├── .gitignore ├── LICENSE ├── docs ├── .nojekyll ├── README.md ├── _sidebar.md ├── index.html └── zh-cn │ ├── QCustomPlot之Item的移动和缩放（十二）.md │ ├── QCustomPlot之Item（十）.md │ ├── QCustomPlot之个性化外观（二）.md │ ├── QCustomPlot之参数曲线（七）.md │ ├── QCustomPlot之层和布局（四）.md │ ├── QCustomPlot之平滑曲线上（八）.md │ ├── QCustomPlot之平滑曲线下（九）.md │ ├── QCustomPlot之开始（一）.md │ ├── QCustomPlot之柱状图（三）.md │ ├── QCustomPlot之简单动态图（六）.md │ └── QCustomPlot之轴矩形和轴（五）.md └── src ├── CMakeLists.txt ├── examples ├── 001_start │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 003_bar_chart_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 004_layout_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 005_axisrect_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 006_dynamic_data_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 007_lemniscate_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 008_smooth_graph_demo_01 │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 009_smooth_graph_demo_02 │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h ├── 012_stretch_item_demo │ ├── CMakeLists.txt │ ├── main.cpp │ ├── mainwindow.cpp │ └── mainwindow.h └── CMakeLists.txt └── qcustomplot ├── CMakeLists.txt ├── GPL.txt ├── changelog.txt ├── qcpplot.cpp ├── qcpplot.h ├── qcpsizehandle.cpp ├── qcpsizehandle.h ├── qcpsizehandlemanager.cpp ├── qcpsizehandlemanager.h ├── qcpsmoothcurve.cpp ├── qcpsmoothcurve.h ├── qcptextbars.cpp ├── qcptextbars.h ├── qcustomplot.cpp └── qcustomplot.h /.gitignore: -------------------------------------------------------------------------------- 1 | bin/ 2 | build* 3 | .vs/ 4 | .idea/ 5 | out* 6 | 7 | cmake-build*/ 8 | *.txt.user 9 | *.autosave -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2022 梁如风 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /docs/.nojekyll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/lancelot-Yagami/QCustomPlot-Manual/ca3fc5f06e037e1cc7b85b2e718a66e62f6a384e/docs/.nojekyll -------------------------------------------------------------------------------- /docs/README.md: -------------------------------------------------------------------------------- 1 | # QCustomPlot使用手册 2 | 3 | > 少年 4 | > 5 | > 我看你骨骼精奇 6 | > 7 | > 是万中无一的武学奇才 8 | > 9 | > 维护世界和平就靠你了 10 | > 11 | > 我这有本秘籍《QCustomPlot使用手册》 12 | > 13 | > 见与你有缘 14 | > 15 | > 就十块卖给你了 16 | 17 | # 注意事项 18 | 19 | 博客上的代码不是最新的，请以[源码](https://github.com/lancelot-Yagami/QCustomPlot-Manual.git)的地址为准 20 | 21 | # 博客教程 22 | 23 | - [安静阅读地址](https://lancelot-yagami.github.io/QCustomPlot-Manual) 24 | - [CSDN博客地址](https://blog.csdn.net/qq10097355/category_9801691.html) 25 | - [简书博客地址](https://www.jianshu.com/nb/43912120) 26 | 27 | 28 | # 构建 29 | 30 | 使用`QtCreator`和`CMake`进行构建，不要使用`MSVC`编译，请使用`MingW`编译 -------------------------------------------------------------------------------- /docs/_sidebar.md: -------------------------------------------------------------------------------- 1 | * [首页](README "QCustomPlot使用手册") 2 | * [QCustomPlot之开始（一）](zh-cn/QCustomPlot之开始（一） "QCustomPlot之开始（一）") 3 | * [QCustomPlot之个性化外观（二）](zh-cn/QCustomPlot之个性化外观（二） "QCustomPlot之个性化外观（二）") 4 | * [QCustomPlot之柱状图（三）](zh-cn/QCustomPlot之柱状图（三） "QCustomPlot之柱状图（三）") 5 | * [QCustomPlot之层和布局（四）](zh-cn/QCustomPlot之层和布局（四） "QCustomPlot之层和布局（四）") 6 | * [QCustomPlot之轴矩形和轴（五）](zh-cn/QCustomPlot之轴矩形和轴（五） "QCustomPlot之轴矩形和轴（五）") 7 | * [QCustomPlot之简单动态图（六）](zh-cn/QCustomPlot之简单动态图（六） "QCustomPlot之简单动态图（六）") 8 | * [QCustomPlot之参数曲线（七）](zh-cn/QCustomPlot之参数曲线（七） "QCustomPlot之参数曲线（七）") 9 | * [QCustomPlot之平滑曲线上（八）](zh-cn/QCustomPlot之平滑曲线上（八） "QCustomPlot之平滑曲线上（八）") 10 | * [QCustomPlot之平滑曲线下（九）](zh-cn/QCustomPlot之平滑曲线下（九） "QCustomPlot之平滑曲线下（九）") 11 | * [QCustomPlot之Item（十）](zh-cn/QCustomPlot之Item（十） "QCustomPlot之Item（十）") 12 | * [QCustomPlot之Item的移动和缩放（十二）](zh-cn/QCustomPlot之Item的移动和缩放（十二） "QCustomPlot之Item的移动和缩放（十二）") -------------------------------------------------------------------------------- /docs/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | QCustomPlot使用手册 6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 | 26 | 27 | 28 | 29 | 30 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之Item的移动和缩放（十二）.md: -------------------------------------------------------------------------------- 1 | 首先看一下效果图 2 | ![移动和缩放Item](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1hOGQyMjdkYjI3NWE0MjE5LmdpZg) 3 | 4 | #### 移动 5 | Item移动的主要思想是改变Item下所有QCPItemPosition的位置来达到移动的目的 6 | 7 | ```C++ 8 | void QCPSizeHandleManager::onItemMove(QCPAbstractItem *item, const QPointF &delta) 9 | { 10 | if (!item || !mItems.contains(item)) 11 | return; 12 | 13 | auto itemData = mItems.value(item); 14 | if (!itemData->movable) 15 | return; 16 | 17 | for (auto position : item->positions()) 18 | position->setPixelPosition(position->pixelPosition() + delta); 19 | } 20 | ``` 21 | 22 | #### 缩放 23 | 与移动稍微不同的是，缩放只是移动一个QCPItemPosition的位置就可以了，不过为了让缩放点可视化，我们在缩放点位置新增了一个QCPSizeHandle，QCPSizeHandle是一个自定义的Item，如果你还不会自定义Item，请看上篇[QCustomPlot之鼠标悬浮显示值（十一）](https://blog.csdn.net/qq10097355/article/details/105048146) 24 | 25 | ```C++ 26 | void QCPSizeHandleManager::onItemResize(QCPSizeHandle *sizeHandle, const QPointF &delta) 27 | { 28 | if (!sizeHandle) 29 | return; 30 | 31 | auto itemData = mItems.value(sizeHandle->attachItem()); 32 | if (!itemData || !itemData->resizable) 33 | return; 34 | 35 | if (auto parentPosition = static_cast(sizeHandle->position->parentAnchor())) 36 | { 37 | parentPosition->setPixelPosition(parentPosition->pixelPosition() + delta); 38 | } 39 | } 40 | ``` 41 | 42 | 具体请查看[源码](https://github.com/lancelot-Yagami/QCustomPlot-Manual/tree/main/src/examples/012_stretch_item_demo) -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之Item（十）.md: -------------------------------------------------------------------------------- 1 | 在QCustomPlot中，所有的Item都继承自`QCPAbstractItem`，QCustomPlot给我们提供了一些Item 2 | 3 | ![QCustomPlot中所有的Item](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1iOTA3NzZhN2VlYTg1MjdjLnBuZw?x-oss-process=image/format,png) 4 | 5 | - QCPItemBracket 括号Item 6 | - QCPItemCurve 曲线Item，其实就是贝塞尔曲线 7 | - QCPItemEllipse 椭圆/圆Item 8 | - QCPItemLine 线段Item 9 | - QCPItemPixmap 图片Item 10 | - QCPItemRect 矩形Item 11 | - QCPItemStraightLine 直线Item 12 | - QCPItemText 文字Item 13 | - QCPItemTracer 追踪者Item 14 | 15 | `QCPAbstractItem`默认存在于`QCustomPlot`的当前层中，默认的当前层为`main`，我们可以通过`setClipToAxisRect`和`setClipAxisRect`设置Item裁切于某个特定的轴矩形，将`setClipToAxisRect`设置为false则Item裁切于`QCustomPlot` 16 | 17 | #### QCPItemAnchor与QCPItemPosition联系与区别 18 | QCPItemPosition继承自QCPItemAnchor，QCPItemAnchor用于给QCPItemPosition定位用的，QCPItemPosition则表示了Item的位置，一个Item可以有多个QCPItemAnchor和QCPItemPosition 19 | 我们主要理解QCPItemPosition是如何决定Item的位置的，它有四种位置类型： 20 | - ptAbsolute 按像素的方式 21 | - ptViewportRatio 按QCustomPlot可视区域的比例 22 | - ptAxisRectRatio 按其存在的轴矩形的比例(通过`setAxisRect`函数设置轴矩形) 23 | - ptPlotCoords 按坐标系位置(通过`setAxes`函数轴) 24 | 25 | 可以通过`setType`、`setTypeX`、`setTypeY`函数设置x、y方向的位置类型，然后通过`setCoords`设置其位置，`setCoords`是跟`setType`设置的类型相关的，Item的位置还跟它锚定的父锚点QCPItemAnchor相关，可以通过`setParentAnchor`、`setParentAnchorX`、`setParentAnchorY`函数设置x、y方向的父锚点，父锚点决定了其起点位置，**当设置父锚点后，type类型会变为ptAbsolute按像素的方式** 26 | 27 | 我们可以直接通过`setPixelPosition`设置Item的像素位置，而不用管`setType`的类型是什么，通过`pixelPosition`返回Item的像素位置 28 | 29 | **以下图片空心圆为QCPItemAnchor，实心圆为QCPItemPosition** 30 | #### QCPItemBracket 31 | 32 | ![QCPItemBracket ](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1kNGZjNWQwNDgyMzNmMGEwLnBuZw?x-oss-process=image/format,png) 33 | 可以看到QCPItemBracket通过`left`和`right`决定其位置，而`center`则用于给其它的QCPItemPosition定位用的，QCPItemBracket通过`setLength`设置`left`/`right`到`center`的垂直距离(像素) 34 | ![setLength设置的长度](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1lNDk4NDBmNDZiYzdjZWRjLnBuZw?x-oss-process=image/format,png) 35 | 36 | QCPItemBracket有四种类型： 37 | - bsSquare 中括号 38 | - bsRound 小括号 39 | - bsCurly 大括号 40 | - bsCalligraphic 实体大括号 41 | 42 | #### QCPItemCurve 43 | 44 | ![QCPItemCurve](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC04ZGI1NzZjN2U0OGJiNDc1LnBuZw?x-oss-process=image/format,png) 45 | 可以看到QCPItemCurve有四个点决定其位置起点`start`和终点`end`以及两个控制点`startDir`、`endDir`，理解QCPItemCurve的位置需要我们对贝塞尔曲线有所理解 46 | 47 | #### QCPItemText 48 | 49 | ![QCPItemText](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0zMjZkYTk2MDdlOTFhYTJkLnBuZw?x-oss-process=image/format,png) 50 | 可以看到QCPItemText由`position`决定其位置，但是`position`不一定是在文字中心的位置，我们可以通过`setPositionAlignment 51 | `设置`position`对齐在文字的哪一个地方，比如要对齐在`topLeft`的位置：setPositionAlignment(Qt::AlignLeft) 52 | 53 | #### QCPItemTracer 54 | tracer是比较常用的一个Item，它主要用来实时跟踪`QCPGraph`的某个数据点，QCPItemTracer也是用一个`position`来决定其位置 55 | 56 | ![QCPItemTracer](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0xMzM4NjU3MDRkMzMzYTBmLnBuZw?x-oss-process=image/format,png) 57 | 58 | QCPItemTracer有五种风格 59 | - tsNone 不显示tracer 60 | - tsPlus 加号 61 | - tsCrosshair 十字线，横跨整个轴矩形 62 | - tsCircle 圆 63 | - tsSquare 方块 64 | 65 | QCPItemTracer通过函数`setGraph`和`setGraphKey`设置要跟踪的图表以及数据点，`setGraph(nullptr)`可以使QCPItemTracer得位置是任意的。QCPItemTracer的位置还跟`setInterpolating`函数有关，当`setInterpolating`为true时，启用线性插值，这时候QCPItemTracer的位置是精确地在我们设置的位置，并且对`value`轴的值进行线性插值；为false的时候QCPItemTracer的位置是最接近于这个位置的`key`值点的位置 -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之个性化外观（二）.md: -------------------------------------------------------------------------------- 1 | QCustomPlot可以制作出优美的图表，它提供了大量可以自定义风格的接口 2 | 3 | #### 设置QCustomPlot的背景颜色 4 | ``` 5 | QLinearGradient plotGradient; 6 | plotGradient.setStart(0, 0); 7 | plotGradient.setFinalStop(0, 350); 8 | plotGradient.setColorAt(0, QColor(80, 80, 80)); 9 | plotGradient.setColorAt(1, QColor(50, 50, 50)); 10 | customPlot->setBackground(plotGradient); // 设置背景颜色 11 | ``` 12 | ![QCustomPlot背景颜色](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC02ZGUyYjM0Y2FjYWI1ZmIxLnBuZw?x-oss-process=image/format,png#pic_center) 13 | 14 | 15 | #### 设置QCPAxisRect轴矩形的背景颜色 16 | ``` 17 | QLinearGradient axisRectGradient; 18 | axisRectGradient.setStart(0, 0); 19 | axisRectGradient.setFinalStop(0, 350); 20 | axisRectGradient.setColorAt(0, QColor(80, 80, 80)); 21 | axisRectGradient.setColorAt(1, QColor(30, 30, 30)); 22 | customPlot->axisRect()->setBackground(axisRectGradient); // 设置QCPAxisRect背景颜色 23 | ``` 24 | 25 | ![轴矩形的背景颜色](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC05YTMwZGFhNjM2YjVmOWQyLnBuZw?x-oss-process=image/format,png) 26 | 27 | 28 | #### 设置QCPAxis轴的风格 29 | ``` 30 | customPlot->xAxis->setBasePen(QPen(Qt::white, 1)); // 轴线的画笔 31 | customPlot->xAxis->setTickPen(QPen(Qt::white, 1)); // 轴刻度线的画笔 32 | customPlot->xAxis->setSubTickPen(QPen(Qt::white, 1)); // 轴子刻度线的画笔 33 | customPlot->xAxis->setTickLabelColor(Qt::white); // 轴刻度文字颜色 34 | customPlot->xAxis->setLabel("标签"); // 只有设置了标签，轴标签的颜色才会显示 35 | customPlot->xAxis->setLabelColor(Qt::white); // 轴标签颜色 36 | customPlot->xAxis->setTickLengthIn(3); // 轴线内刻度的长度 37 | customPlot->xAxis->setTickLengthOut(5); // 轴线外刻度的长度 38 | customPlot->xAxis->setUpperEnding(QCPLineEnding::esSpikeArrow); // 设置轴线结束时的风格为 实角三角形但内部有凹陷的形状， setLowerEnding设置轴线开始时的风格 39 | ``` 40 | 41 | ![轴风格](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0zMDQyN2IwYzAyNjgyZWM3LnBuZw?x-oss-process=image/format,png#pic_center) 42 | 43 | 44 | #### 设置QCPGrid网格的风格 45 | ``` 46 | // 每条网格对应一个刻度 47 | customPlot->xAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine)); // 网格线(对应刻度)画笔 48 | customPlot->yAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine)); 49 | customPlot->xAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine)); // 子网格线(对应子刻度)画笔 50 | customPlot->yAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine)); 51 | customPlot->xAxis->grid()->setSubGridVisible(true); // 显示子网格线 52 | customPlot->yAxis->grid()->setSubGridVisible(true); 53 | customPlot->xAxis->grid()->setZeroLinePen(QPen(Qt::red)); // 设置刻度为0时的网格线的画笔 54 | customPlot->yAxis->grid()->setZeroLinePen(QPen(Qt::red)); 55 | ``` 56 | ![网格线风格](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC00MWY1YmQ4Y2RhMzAwOGZmLnBuZw?x-oss-process=image/format,png#pic_center) 57 | 58 | 59 | #### 图表的风格 60 | ``` 61 | QPen pen; 62 | QStringList lineNames; 63 | lineNames << "lsNone" << "lsLine" << "lsStepLeft" << "lsStepRight" << "lsStepCenter" << "lsImpulse"; 64 | 65 | for (int i = QCPGraph::lsNone; i <= QCPGraph::lsImpulse; ++i) 66 | { 67 | customPlot->addGraph(); 68 | pen.setColor(QColor(qSin(i*1+1.2)*80+80, qSin(i*0.3+0)*80+80, qSin(i*0.3+1.5)*80+80)); 69 | customPlot->graph()->setPen(pen); // 设置图表的画笔 70 | customPlot->graph()->setName(lineNames.at(i-QCPGraph::lsNone)); 71 | customPlot->graph()->setLineStyle((QCPGraph::LineStyle)i); // 设置图表线段的风格 72 | customPlot->graph()->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, 5)); // 设置图表散点图的样式，散点图的样式有很多种，可以自己试试 73 | 74 | QVector x(15), y(15); 75 | for (int j=0; j<15; ++j) 76 | { 77 | x[j] = j/15.0 * 5*3.14 + 0.01; 78 | y[j] = 7*qSin(x[j])/x[j] - (i-QCPGraph::lsNone)*5 + (QCPGraph::lsImpulse)*5 + 2; 79 | } 80 | customPlot->graph()->setData(x, y); 81 | customPlot->graph()->rescaleAxes(true); 82 | } 83 | ``` 84 | 85 | ![图表风格](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0wMTZmNjI1NDZmMzM5YTNhLnBuZw?x-oss-process=image/format,png#pic_center) 86 | 87 | 88 | #### 图表画刷 89 | ``` 90 | // 第一种：与0刻度线围成区域 91 | customPlot->addGraph(); 92 | customPlot->graph(0)->setPen(QPen(Qt::blue)); 93 | customPlot->graph(0)->setBrush(QBrush(QColor(0, 0, 255, 20))); 94 | customPlot->addGraph(); 95 | customPlot->graph(1)->setPen(QPen(Qt::red)); 96 | 97 | // 第二种方式：与其它图围成区域，使用的是图0的画刷 98 | // customPlot->graph(0)->setChannelFillGraph(customPlot->graph(1)); // 将图0与图1围成区域 99 | ``` 100 | ![图表画刷](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC03MDM4ZjUyOWRiNDRkNjVmLnBuZw?x-oss-process=image/format,png#pic_center) 101 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之参数曲线（七）.md: -------------------------------------------------------------------------------- 1 | `QCPCurve`用于绘制参数方程曲线，常见的参数方程有以下几种： 2 | 3 | ![常见参数方程曲线](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC03MmQ2NmMzNzNmNjBlNTZiLnBuZw?x-oss-process=image/format,png#pic_center) 4 | 5 | `QCPCurve`与`QCPGraph`的区别在于它引入了第三个坐标`t`，而`QCPGraph`只有x,y两个坐标，这是因为在参数方程曲线中，可能会有多个点对应同个key坐标，而`t`坐标的引入决定了参数方程x,y坐标的顺序，这样就不会混乱 6 | 7 | 在数据方面，`t`坐标在QCPCurve表现为排序键`sortKey`，`x`坐标表现为主键`mainKey`，`y`坐标表现为`mainValue`，而在QCPGraph中排序键`sortKey`和主键`mainKey`都是`x`坐标，`y`坐标表现为`mainValue` 8 | 9 | #### 参数方程的使用 10 | 11 | ``` 12 | void MainWindow::setupLemniscateDemo(QCustomPlot *customPlot) 13 | { 14 | QCPCurve *curve = new QCPCurve(customPlot->xAxis, customPlot->yAxis); 15 | curve->setPen(QPen(Qt::red)); 16 | 17 | // 由于我们是动态图，并且其范围不变化，所以预先设置好了范围 18 | customPlot->xAxis->setRange(-2.5, 12.5); 19 | customPlot->yAxis->setRange(-2.8, 2.8); 20 | 21 | connect(&dataTimer, SIGNAL(timeout()), this, SLOT(dynamicLemniscateSlot())); 22 | dataTimer.start(10); // 10ms刷新一次，实际上QTimer可能达不到这个精度 23 | } 24 | ``` 25 | 26 | 参数方程来自：[伯努利双纽线(无穷大的符号)](https://blog.csdn.net/stereohomology/article/details/45528463) 27 | ``` 28 | void MainWindow::dynamicLemniscateSlot() 29 | { 30 | static double t = -M_PI; // 定义起始t 31 | static bool reversed = false; // 为了重复绘制 32 | 33 | QCPCurve *curve = static_cast(ui->customPlot->plottable(0)); 34 | 35 | // 伯努利双纽线(无穷大的符号) 36 | double x = -686*qCos(t) + 735*qCos(2*t) + 490*qSqrt(qPow(qSin(t), 4)) - 265; 37 | x /= (280*qCos(t) - 298); 38 | double y = 5*qSqrt(qPow(qSin(t), 4))*(10/qSin(t) - 7/qTan(t)) + 3*(35*qCos(t) - 33)*qSin(t); 39 | y = 7*y/(140*qCos(t) - 149); 40 | 41 | if (!reversed) { // 还未绘制完成 42 | t += 0.01; 43 | curve->data()->add(QCPCurveData(t, x, y)); 44 | } else { // 绘制已经完成，倒退回去 45 | t -= 0.01; 46 | curve->data()->removeAfter(t); // 这里不能用remove，因为精度原因，remove并不能精确匹配，导致无法删除数据点 47 | } 48 | 49 | ui->customPlot->replot(); 50 | 51 | // 重复绘制 52 | if (t >= M_PI) { 53 | t = M_PI; 54 | reversed = true; 55 | } else if (reversed && t <= -M_PI) { 56 | t = -M_PI; 57 | reversed = false; 58 | } 59 | } 60 | ``` 61 | 62 | 63 | ![效果图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0wZjQzY2M0ZmQwZGE3ODVkLmdpZg#pic_center) 64 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之层和布局（四）.md: -------------------------------------------------------------------------------- 1 | #### 层和层元素 2 | 3 | 在QCustomPlot中，一切可显示的对象都是继承自层元素`QCPLayerable`，层`QCPLayer`则管理着层元素，QCustomPlot利用层决定了不同元素的绘制顺序 4 | 层有两种刷新模式： 5 | - lmLogical 只用于渲染的顺序，并且与`相邻`的lmLogical层共享绘图缓存（注意这里的相邻，如果前一个层是`lmBuffered`模式，则会新建一个绘图缓存用于绘图） 6 | - lmBuffered 层拥有自己的绘图缓存，并且可以单独的刷新（调用`QCPLayer::replot`函数） 7 | 8 | 默认只有`overlay`层启用了`lmBuffered`单独绘制机制，其它层都共享一个绘图缓存，因为`overlay`层主要是用于存放悬浮与图表上的item项，需要频繁的刷新，启用了`lmBuffered`的层会多占用内存 9 | 10 | #### 布局和布局元素 11 | 在QCustomPlot中，布局方式只有两种： 12 | 13 | * QCPLayoutGrid 网格布局 14 | * QCPLayoutInset 内嵌式布局， 这种布局的作用是把子元素与布局的边界对齐或者将其放置在布局内的任意位置(图例QCPLegend就被放置在此布局内)，严格来说这个并不算布局 15 | 16 | 我们可以看下继承关系图，可以看到这两种布局都继承自`QCPLayout`，而`QCPLayout`继承自`QCPLayoutElement`布局元素，所以一个布局可以包含另一个布局，布局内的元素都要继承自`QCPLayoutElement` 17 | 18 | ![继承关系图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1iZmQxZDY3NDNkNTZlODljLnBuZw?x-oss-process=image/format,png#pic_center) 19 | 20 | 21 | 在QCustomPlot里面维护着一个网格布局，默认只有一个QCPAxisRect元素，而QCPAxisRect里则维护这一个内嵌式的布局，用于放置图例QCPLegend 22 | 23 | ``` 24 | mPlotLayout = new QCPLayoutGrid; 25 | mPlotLayout->initializeParentPlot(this); 26 | mPlotLayout->setParent(this); 27 | mPlotLayout->setLayer(QLatin1String("main")); // 设置网格布局的层为main层 28 | 29 | QCPAxisRect *defaultAxisRect = new QCPAxisRect(this, true); 30 | mPlotLayout->addElement(0, 0, defaultAxisRect); 31 | xAxis = defaultAxisRect->axis(QCPAxis::atBottom); 32 | yAxis = defaultAxisRect->axis(QCPAxis::atLeft); 33 | xAxis2 = defaultAxisRect->axis(QCPAxis::atTop); 34 | yAxis2 = defaultAxisRect->axis(QCPAxis::atRight); 35 | legend = new QCPLegend; 36 | legend->setVisible(false); // 默认不显示图例 37 | defaultAxisRect->insetLayout()->addElement(legend, Qt::AlignRight | Qt::AlignTop); // 设置图例对齐于QCPAxisRect的右上角 38 | defaultAxisRect->insetLayout()->setMargins(QMargins(12, 12, 12, 12)); // 设置布局的外边距 39 | 40 | defaultAxisRect->setLayer(QLatin1String("background")); // QCPAxisRect的层设置为background层 41 | ``` 42 | 43 | 于是我们可以设置图例的位置 44 | ``` 45 | customPlot->legend->setVisible(true); // 因为图例默认为隐藏的，所以让其显示 46 | customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop | Qt::AlignHCenter); // 对齐于QCPAxisRect中间的顶部 47 | 48 | // 以任意位置的方式放置图例，解开以下的注释查看效果 49 | // customPlot->axisRect()->insetLayout()->setInsetPlacement(0, QCPLayoutInset::ipFree); 50 | // customPlot->axisRect()->insetLayout()->setInsetRect(0, QRectF(0.6, 0.0, 0.2, 0.2)); // 这里按比例给出图例的位置，在QCPAxisRect的(60%,40%)的位置，宽高分别为QCPAxisRect的(20%,20%)宽高的大小 51 | ``` 52 | 53 | ![对齐边界的方式](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC05Y2Y1M2ZlOWI4MTJkNDg1LnBuZw?x-oss-process=image/format,png#pic_center) 54 | ![自由位置的方式](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0zMmQ2OGFjODNlNTNlMzVhLnBuZw?x-oss-process=image/format,png#pic_center) 55 | 56 | 57 | 我们甚至可以把它放置在QCustomPlot中，而不是在QCPAxisRect中，但是这种做法不太可取，just for fun :) 58 | 59 | ``` 60 | customPlot->plotLayout()->setMargins(QMargins(0, 0, 0, 30)); // 首先为底部预留出足够的空间 61 | customPlot->axisRect()->insetLayout()->setInsetPlacement(0, QCPLayoutInset::ipFree); // 设置以任意位置放置图例，以对齐边界的方式不行 62 | customPlot->axisRect()->insetLayout()->setInsetRect(0, QRectF(0.0, 1.2, 1.0, 0.1)); // 将y方向的位置设置为超过1以便它的位置超过QCPAxisRect的位置 63 | ``` 64 | 65 | ![图例放置在QCustomPlot中](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC03ZWUwOTAxNjg3MmU3OTVlLnBuZw?x-oss-process=image/format,png#pic_center) 66 | 67 | 其实我们还可以将图例放置在QCustomPlot的网格布局中，这样也可以将图例放置在QCustomPlot中，但这种方法写起来比较麻烦，这里就不讲解了 68 | 69 | 70 | #### 为图表添加标题 71 | 72 | 有了布局，我们可以为所欲为，添加标题很简单，仅需`QCPTextElement`类即可，它也是一个布局元素 73 | ``` 74 | customPlot->plotLayout()->insertRow(0); // 插入一行 75 | customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, "Regenerative Energies", QFont("sans", 12, QFont::Bold))); // 在第一行第一列添加标题 76 | 77 | ``` 78 | 79 | ![为图表添加标题](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC05MDNmYWYwODU1NjlhOTQ5LnBuZw?x-oss-process=image/format,png#pic_center) 80 | 81 | 82 | #### 为图例添加标题 83 | `QCPLegend`继承自`QCPLayoutGrid`，所以我们也很容易为图例添加一个标题 84 | 85 | ``` 86 | QCPTextElement *title = new QCPTextElement(ui->customPlot, "这是图例标题", QFont("sans", 10, QFont::Bold)); 87 | title->setMargins(QMargins(0, 6, 0, 10)); // 为了效果更好，添加一些边距 88 | title->setLayer("legend"); // 一定要把标题的层设置为legend层 89 | 90 | customPlot->legend->insertRow(0); // 插入一行 91 | customPlot->legend->addElement(0, 0, title); // 在第一行第一列添加标题 92 | ``` 93 | 94 | ![为图例添加标题](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1mZmU0YjMyNjdjMWQ3MTNiLnBuZw?x-oss-process=image/format,png#pic_center) 95 | 96 | #### 横向图例 97 | 只需将图例布局的填充顺序改为以列的方式（图例默认是以行的方式，所以是竖向的） 98 | ``` 99 | customPlot->legend->setFillOrder(QCPLayoutGrid::foColumnsFirst); 100 | ``` -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之平滑曲线上（八）.md: -------------------------------------------------------------------------------- 1 | 在QCustomPlot中，并没有为我们提供平滑曲线，所以需要我们改造它 2 | 3 | #### 一、生成平滑曲线 4 | **2020-6-6日更新修复当数据中有NaN的数据时平滑曲线的显示问题** 5 | 来源：[公孙二狗](https://qtdebug.com/qtbook-paint-smooth-curve/) ，在这里感谢狗哥 6 | 生成平滑曲线的方法我也不知道，反正拿来用就是了 7 | ``` 8 | class SmoothCurveGenerator 9 | { 10 | protected: 11 | static QPainterPath generateSmoothCurveImp(const QVector &points) { 12 | QPainterPath path; 13 | int len = points.size(); 14 | 15 | if (len < 2) { 16 | return path; 17 | } 18 | 19 | QVector firstControlPoints; 20 | QVector secondControlPoints; 21 | calculateControlPoints(points, &firstControlPoints, &secondControlPoints); 22 | 23 | path.moveTo(points[0].x(), points[0].y()); 24 | 25 | // Using bezier curve to generate a smooth curve. 26 | for (int i = 0; i < len - 1; ++i) { 27 | path.cubicTo(firstControlPoints[i], secondControlPoints[i], points[i+1]); 28 | } 29 | 30 | return path; 31 | } 32 | public: 33 | static QPainterPath generateSmoothCurve(const QVector &points) { 34 | QPainterPath result; 35 | 36 | int segmentStart = 0; 37 | int i = 0; 38 | int pointSize = points.size(); 39 | while (i < pointSize) { 40 | if (qIsNaN(points.at(i).y()) || qIsNaN(points.at(i).x()) || qIsInf(points.at(i).y())) { 41 | QVector lineData(QVector(points.constBegin() + segmentStart, points.constBegin() + i - segmentStart)); 42 | result.addPath(generateSmoothCurveImp(lineData)); 43 | segmentStart = i + 1; 44 | } 45 | ++i; 46 | } 47 | QVector lineData(QVector(points.constBegin() + segmentStart, points.constEnd())); 48 | result.addPath(generateSmoothCurveImp(lineData)); 49 | return result; 50 | } 51 | 52 | static QPainterPath generateSmoothCurve(const QPainterPath &basePath, const QVector &points) { 53 | if (points.isEmpty()) return basePath; 54 | 55 | QPainterPath path = basePath; 56 | int len = points.size(); 57 | if (len == 1) { 58 | path.lineTo(points.at(0)); 59 | return path; 60 | } 61 | 62 | QVector firstControlPoints; 63 | QVector secondControlPoints; 64 | calculateControlPoints(points, &firstControlPoints, &secondControlPoints); 65 | 66 | path.lineTo(points.at(0)); 67 | for (int i = 0; i < len - 1; ++i) 68 | path.cubicTo(firstControlPoints[i], secondControlPoints[i], points[i+1]); 69 | 70 | return path; 71 | } 72 | 73 | static void calculateFirstControlPoints(double *&result, const double *rhs, int n) { 74 | result = new double[n]; 75 | double *tmp = new double[n]; 76 | double b = 2.0; 77 | result[0] = rhs[0] / b; 78 | 79 | // Decomposition and forward substitution. 80 | for (int i = 1; i < n; i++) { 81 | tmp[i] = 1 / b; 82 | b = (i < n - 1 ? 4.0 : 3.5) - tmp[i]; 83 | result[i] = (rhs[i] - result[i - 1]) / b; 84 | } 85 | 86 | for (int i = 1; i < n; i++) { 87 | result[n - i - 1] -= tmp[n - i] * result[n - i]; // Backsubstitution. 88 | } 89 | 90 | delete[] tmp; 91 | } 92 | 93 | static void calculateControlPoints(const QVector &knots, 94 | QVector *firstControlPoints, 95 | QVector *secondControlPoints) { 96 | int n = knots.size() - 1; 97 | 98 | firstControlPoints->reserve(n); 99 | secondControlPoints->reserve(n); 100 | 101 | for (int i = 0; i < n; ++i) { 102 | firstControlPoints->append(QPointF()); 103 | secondControlPoints->append(QPointF()); 104 | } 105 | 106 | if (n == 1) { 107 | // Special case: Bezier curve should be a straight line. 108 | // P1 = (2P0 + P3) / 3 109 | (*firstControlPoints)[0].rx() = (2 * knots[0].x() + knots[1].x()) / 3; 110 | (*firstControlPoints)[0].ry() = (2 * knots[0].y() + knots[1].y()) / 3; 111 | 112 | // P2 = 2P1 – P0 113 | (*secondControlPoints)[0].rx() = 2 * (*firstControlPoints)[0].x() - knots[0].x(); 114 | (*secondControlPoints)[0].ry() = 2 * (*firstControlPoints)[0].y() - knots[0].y(); 115 | 116 | return; 117 | } 118 | 119 | // Calculate first Bezier control points 120 | double *xs = nullptr; 121 | double *ys = nullptr; 122 | double *rhsx = new double[n]; // Right hand side vector 123 | double *rhsy = new double[n]; // Right hand side vector 124 | 125 | // Set right hand side values 126 | for (int i = 1; i < n - 1; ++i) { 127 | rhsx[i] = 4 * knots[i].x() + 2 * knots[i + 1].x(); 128 | rhsy[i] = 4 * knots[i].y() + 2 * knots[i + 1].y(); 129 | } 130 | rhsx[0] = knots[0].x() + 2 * knots[1].x(); 131 | rhsx[n - 1] = (8 * knots[n - 1].x() + knots[n].x()) / 2.0; 132 | rhsy[0] = knots[0].y() + 2 * knots[1].y(); 133 | rhsy[n - 1] = (8 * knots[n - 1].y() + knots[n].y()) / 2.0; 134 | 135 | // Calculate first control points coordinates 136 | calculateFirstControlPoints(xs, rhsx, n); 137 | calculateFirstControlPoints(ys, rhsy, n); 138 | 139 | // Fill output control points. 140 | for (int i = 0; i < n; ++i) { 141 | (*firstControlPoints)[i].rx() = xs[i]; 142 | (*firstControlPoints)[i].ry() = ys[i]; 143 | 144 | if (i < n - 1) { 145 | (*secondControlPoints)[i].rx() = 2 * knots[i + 1].x() - xs[i + 1]; 146 | (*secondControlPoints)[i].ry() = 2 * knots[i + 1].y() - ys[i + 1]; 147 | } else { 148 | (*secondControlPoints)[i].rx() = (knots[n].x() + xs[n - 1]) / 2; 149 | (*secondControlPoints)[i].ry() = (knots[n].y() + ys[n - 1]) / 2; 150 | } 151 | } 152 | 153 | delete xs; 154 | delete ys; 155 | delete[] rhsx; 156 | delete[] rhsy; 157 | } 158 | }; 159 | ``` 160 | 161 | #### 二、drawLinePlot函数的修改 162 | 163 | `mSmooth`为我们添加的一个`bool`型的类成员变量，并且我们限制了`QCPGraph`的线风格`mLineStyle`为`lsLine`的时候才会真正的绘制平滑曲线 164 | ``` 165 | void QCPGraph::drawLinePlot(QCPPainter *painter, const QVector &lines) const 166 | { 167 | if (painter->pen().style() != Qt::NoPen && painter->pen().color().alpha() != 0) { 168 | applyDefaultAntialiasingHint(painter); 169 | if (mSmooth && mLineStyle == lsLine) painter->drawPath(SmoothCurveGenerator::generateSmoothCurve(lines)); 170 | else drawPolyline(painter, lines); 171 | } 172 | } 173 | ``` 174 | 175 | 这时候已经可以实现平滑曲线了，来个简单的例子看下 176 | ``` 177 | void MainWindow::setupSmoothCurveDemo(QCustomPlot *customPlot) 178 | { 179 | QVector xdata = { 1, 2, 3, 4, 5, 6, 7 }; 180 | QVector ydata = { 820, 932, 901, 934, 1290, 1330, 1320 }; 181 | 182 | QCPSmoothCurve *graph = new QCPSmoothCurve(customPlot->xAxis, customPlot->yAxis); 183 | graph->setPen(QPen(Qt::red, 2)); 184 | graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(Qt::red), QColor(Qt::white), 6)); 185 | graph->setData(xdata, ydata); 186 | graph->setSmooth(true); // 开启平滑曲线 187 | 188 | customPlot->xAxis->setRange(0, 8); 189 | customPlot->yAxis->setRange(0, 1500); 190 | } 191 | ``` 192 | ![平滑曲线与折线对比图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC00MDUwZTJjNjljZjRmOWY1LnBuZw?x-oss-process=image/format,png) 193 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之平滑曲线下（九）.md: -------------------------------------------------------------------------------- 1 | 接上篇[QCustomPlot之平滑曲线上（八）](zh-cn/QCustomPlot之平滑曲线上（八）)，上篇只是实现了平滑曲线的绘制，但是并没有实现平滑曲线与0点线之间的填充区域以及两个`QCPGraph`之间的填充区域，我们将在这里实现它们 2 | 3 | #### drawFill函数的修改 4 | ``` 5 | void QCPSmoothCurve::drawFill(QCPPainter *painter, QVector *lines) const 6 | { 7 | if (mLineStyle == lsImpulse) return; // fill doesn't make sense for impulse plot 8 | if (painter->brush().style() == Qt::NoBrush || painter->brush().color().alpha() == 0) return; 9 | 10 | applyFillAntialiasingHint(painter); 11 | QVector segments = getNonNanSegments(lines, keyAxis()->orientation()); 12 | if (!mChannelFillGraph) // 与0点线围成的区域 13 | { 14 | // draw base fill under graph, fill goes all the way to the zero-value-line: 15 | for (int i=0; idrawPath(getSmoothFillPath(lines, segments.at(i))); // 平滑曲线 18 | else 19 | painter->drawPolygon(getFillPolygon(lines, segments.at(i))); // 折线 20 | } else // 与其它QCPGraph围成的区域 21 | { 22 | // draw fill between this graph and mChannelFillGraph: 23 | auto channelFillGraph = qobject_cast(mChannelFillGraph.data()); 24 | if (!channelFillGraph) { 25 | qDebug() << "ChannelFillGraph must be QCPSmoothCurve"; 26 | return; 27 | } 28 | QVector otherLines; 29 | channelFillGraph->getLines(&otherLines, QCPDataRange(0, channelFillGraph->dataCount())); 30 | if (!otherLines.isEmpty()) 31 | { 32 | QVector otherSegments = getNonNanSegments(&otherLines, channelFillGraph->keyAxis()->orientation()); 33 | QVector > segmentPairs = getOverlappingSegments(segments, lines, otherSegments, &otherLines); 34 | for (int i=0; imLineStyle == lsLine) 36 | painter->drawPath(getSmoothChannelFillPath(lines, segmentPairs.at(i).first, &otherLines, segmentPairs.at(i).second)); // 平滑曲线 37 | else 38 | painter->drawPolygon(getChannelFillPolygon(lines, segmentPairs.at(i).first, &otherLines, segmentPairs.at(i).second)); // 折线 39 | } 40 | } 41 | } 42 | } 43 | ``` 44 | 45 | #### 与0点线之间的填充区域 46 | 47 | ``` 48 | QPainterPath QCPSmoothCurve::getSmoothFillPath(const QVector *lineData, QCPDataRange segment) const 49 | { 50 | // 只有一个点构不成填充区域 51 | if (segment.size() < 2) 52 | return QPainterPath(); 53 | 54 | // 起点，终点对应在轴上的位置 55 | QPointF start = getFillBasePoint(lineData->at(segment.begin())); 56 | QPointF end = getFillBasePoint(lineData->at(segment.end() - 1)); 57 | 58 | // 将平滑曲线连成一个封闭区域 59 | QPainterPath path = SmoothCurveGenerator::generateSmoothCurve(*lineData); 60 | path.lineTo(end); 61 | path.lineTo(start); 62 | path.lineTo(lineData->at(segment.begin())); 63 | return path; 64 | } 65 | ``` 66 | 67 | ![与0点线之间的填充区域](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC02Y2ZkNDM4NDUxNGQwOGM4LnBuZw?x-oss-process=image/format,png) 68 | 69 | 70 | #### 与其它QCPGraph围成的区域 71 | `getSmoothChannelFillPath`基本是从`getChannelFillPolygon`复制过来的，我们在这上面进行修改，修改的内容我都有注释 72 | ``` 73 | QPainterPath QCPSmoothCurve::getSmoothChannelFillPath(const QVector *thisData, QCPDataRange thisSegment, 74 | const QVector *otherData, QCPDataRange otherSegment) const 75 | { 76 | QPainterPath result; 77 | auto channelFillGraph = qobject_cast(mChannelFillGraph.data()); 78 | if (!channelFillGraph) { 79 | qDebug() << "ChannelFillGraph must be QCPSmoothCurve"; 80 | return result; 81 | } 82 | 83 | QCPAxis *keyAxis = mKeyAxis.data(); 84 | QCPAxis *valueAxis = mValueAxis.data(); 85 | if (!keyAxis || !valueAxis) { qDebug() << Q_FUNC_INFO << "invalid key or value axis"; return result; } 86 | if (!channelFillGraph->mKeyAxis) { qDebug() << Q_FUNC_INFO << "channel fill target key axis invalid"; return result; } 87 | 88 | if (channelFillGraph->mKeyAxis.data()->orientation() != keyAxis->orientation()) 89 | return result; // don't have same axis orientation, can't fill that (Note: if keyAxis fits, valueAxis will fit too, because it's always orthogonal to keyAxis) 90 | 91 | if (thisData->isEmpty()) return result; 92 | QVector thisSegmentData(thisSegment.size()); 93 | QVector otherSegmentData(otherSegment.size()); 94 | std::copy(thisData->constBegin()+thisSegment.begin(), thisData->constBegin()+thisSegment.end(), thisSegmentData.begin()); 95 | std::copy(otherData->constBegin()+otherSegment.begin(), otherData->constBegin()+otherSegment.end(), otherSegmentData.begin()); 96 | // pointers to be able to swap them, depending which data range needs cropping: 97 | QVector *staticData = &thisSegmentData; 98 | QVector *croppedData = &otherSegmentData; 99 | 100 | //! [1] 以下为添加的内容 101 | result = SmoothCurveGenerator::generateSmoothCurve(thisSegmentData); 102 | if (channelFillGraph->mSmooth && channelFillGraph->mLineStyle == lsLine) { // mChannelFillGraph也是平滑曲线 103 | QVector otherSegmentDataReverse(otherSegmentData.size()); 104 | for (int i = otherSegmentData.size() - 1; i >= 0; --i) 105 | otherSegmentDataReverse[otherSegmentData.size() - i - 1] = otherSegmentData.at(i); 106 | result = SmoothCurveGenerator::generateSmoothCurve(result, otherSegmentDataReverse); 107 | } else { // mChannelFillGraph 是折线 108 | // mLineStyle != lsLine 会导致闪烁，目前还不知道什么原因造成 109 | for (int i = otherSegmentData.size() - 1; i >= 0; --i) 110 | result.lineTo(otherSegmentData.at(i)); 111 | } 112 | //! [1] 113 | 114 | // crop both vectors to ranges in which the keys overlap (which coord is key, depends on axisType): 115 | if (keyAxis->orientation() == Qt::Horizontal) 116 | { 117 | // x is key 118 | // crop lower bound: 119 | if (staticData->first().x() < croppedData->first().x()) // other one must be cropped 120 | qSwap(staticData, croppedData); 121 | const int lowBound = findIndexBelowX(croppedData, staticData->first().x()); 122 | if (lowBound == -1) return result; // key ranges have no overlap 123 | //! [2] 以下为添加的内容 124 | QPointF firstPoint = QPointF(croppedData->at(0).x(), valueAxis->coordToPixel(valueAxis->range().upper)); // 注意这里只裁剪到了轴矩形的可见区域 125 | //! [2] 126 | croppedData->remove(0, lowBound); 127 | // set lowest point of cropped data to fit exactly key position of first static data point via linear interpolation: 128 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 129 | double slope; 130 | if (!qFuzzyCompare(croppedData->at(1).x(), croppedData->at(0).x())) 131 | slope = (croppedData->at(1).y()-croppedData->at(0).y())/(croppedData->at(1).x()-croppedData->at(0).x()); 132 | else 133 | slope = 0; 134 | (*croppedData)[0].setY(croppedData->at(0).y()+slope*(staticData->first().x()-croppedData->at(0).x())); 135 | (*croppedData)[0].setX(staticData->first().x()); 136 | 137 | //! [3] 以下为添加的内容 138 | QPointF lastPoint = QPointF(staticData->first().x(), valueAxis->coordToPixel(valueAxis->range().lower)); // 注意这里只裁剪到了轴矩形的可见区域 139 | QPainterPath droppedPath; 140 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 141 | result -= droppedPath; // 裁掉多余区域 142 | //! [3] 143 | 144 | // crop upper bound: 145 | if (staticData->last().x() > croppedData->last().x()) // other one must be cropped 146 | qSwap(staticData, croppedData); 147 | int highBound = findIndexAboveX(croppedData, staticData->last().x()); 148 | if (highBound == -1) return result; // key ranges have no overlap 149 | //! [4] 以下为添加的内容 150 | firstPoint = QPointF(croppedData->last().x(), valueAxis->coordToPixel(valueAxis->range().lower)); // 注意这里只裁剪到了轴矩形的可见区域 151 | //! [4] 152 | croppedData->remove(highBound+1, croppedData->size()-(highBound+1)); 153 | // set highest point of cropped data to fit exactly key position of last static data point via linear interpolation: 154 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 155 | const int li = croppedData->size()-1; // last index 156 | if (!qFuzzyCompare(croppedData->at(li).x(), croppedData->at(li-1).x())) 157 | slope = (croppedData->at(li).y()-croppedData->at(li-1).y())/(croppedData->at(li).x()-croppedData->at(li-1).x()); 158 | else 159 | slope = 0; 160 | (*croppedData)[li].setY(croppedData->at(li-1).y()+slope*(staticData->last().x()-croppedData->at(li-1).x())); 161 | (*croppedData)[li].setX(staticData->last().x()); 162 | 163 | //! [5] 以下为添加的内容 164 | lastPoint = QPointF(staticData->last().x(), valueAxis->coordToPixel(valueAxis->range().upper)); 165 | droppedPath = QPainterPath(); 166 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 167 | result -= droppedPath; // 裁掉多余区域 168 | //! [5] 169 | } else // mKeyAxis->orientation() == Qt::Vertical 170 | { 171 | // y is key 172 | // crop lower bound: 173 | if (staticData->first().y() < croppedData->first().y()) // other one must be cropped 174 | qSwap(staticData, croppedData); 175 | int lowBound = findIndexBelowY(croppedData, staticData->first().y()); 176 | if (lowBound == -1) return result; // key ranges have no overlap 177 | //! [6] 以下为添加的内容 178 | QPointF firstPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().upper), croppedData->first().y()); 179 | //! [6] 180 | croppedData->remove(0, lowBound); 181 | // set lowest point of cropped data to fit exactly key position of first static data point via linear interpolation: 182 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 183 | double slope; 184 | if (!qFuzzyCompare(croppedData->at(1).y(), croppedData->at(0).y())) // avoid division by zero in step plots 185 | slope = (croppedData->at(1).x()-croppedData->at(0).x())/(croppedData->at(1).y()-croppedData->at(0).y()); 186 | else 187 | slope = 0; 188 | (*croppedData)[0].setX(croppedData->at(0).x()+slope*(staticData->first().y()-croppedData->at(0).y())); 189 | (*croppedData)[0].setY(staticData->first().y()); 190 | 191 | //! [7] 以下为添加的内容 192 | QPointF lastPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().lower), staticData->first().y()); 193 | QPainterPath droppedPath; 194 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 195 | result -= droppedPath; 196 | //! [7] 197 | 198 | // crop upper bound: 199 | if (staticData->last().y() > croppedData->last().y()) // other one must be cropped 200 | qSwap(staticData, croppedData); 201 | int highBound = findIndexAboveY(croppedData, staticData->last().y()); 202 | if (highBound == -1) return result; // key ranges have no overlap 203 | //! [8] 以下为添加的内容 204 | firstPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().lower), croppedData->last().y()); 205 | //! [8] 206 | croppedData->remove(highBound+1, croppedData->size()-(highBound+1)); 207 | // set highest point of cropped data to fit exactly key position of last static data point via linear interpolation: 208 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 209 | int li = croppedData->size()-1; // last index 210 | if (!qFuzzyCompare(croppedData->at(li).y(), croppedData->at(li-1).y())) // avoid division by zero in step plots 211 | slope = (croppedData->at(li).x()-croppedData->at(li-1).x())/(croppedData->at(li).y()-croppedData->at(li-1).y()); 212 | else 213 | slope = 0; 214 | (*croppedData)[li].setX(croppedData->at(li-1).x()+slope*(staticData->last().y()-croppedData->at(li-1).y())); 215 | (*croppedData)[li].setY(staticData->last().y()); 216 | 217 | //! [9] 以下为添加的内容 218 | lastPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().upper), staticData->last().y()); 219 | droppedPath = QPainterPath(); 220 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 221 | result -= droppedPath; 222 | //! [9] 223 | } 224 | return result; 225 | } 226 | ``` 227 | 228 | ![与其它QCPGraph围成的区域](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1kOTFjMjE3NTNkMTIwZjAzLnBuZw?x-oss-process=image/format,png) 229 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之开始（一）.md: -------------------------------------------------------------------------------- 1 | ## 一、前言 2 | QCustomPlot是Qt的一个小型第三方图表库，支持静态/动态曲线、柱状图、蜡烛图、频谱图等。使用方便， 3 | 4 | 使用方法： 5 | * 直接使用：包含qcustomplot.h和qcustomplot.cpp文件即可 6 | * 生成动态库使用：在生成动态库时定义宏：`QCUSTOMPLOT_COMPILE_LIBRARY`，在使用动态库时定义宏：`QCUSTOMPLOT_USE_LIBRARY` 7 | 8 | 下载地址：https://www.qcustomplot.com/index.php/download 9 | 10 | ## 二、简单介绍QCustomPlot的几个重要类 11 | 12 | * QCustomPlot 图表类：用于图表的显示和交互 13 | * QCPLayer 图层：管理图层元素（QCPLayerable），所有可显示的对象都是继承自图层元素 14 | * QCPAbstractPlottable 绘图元素：包含 折线图(QCPGraph)、曲线图(QCPCurve)、柱状图(QCPBars)、QCPStatiBox(盒子图)、QCPColorMap(色谱图)、QCPFinancial(金融图) 15 | * QCPAxisRect 坐标轴矩形：一个坐标轴矩形默认包含上下左右四个坐标轴，但是可以添加多个坐标轴 16 | 17 | ## 三、简单介绍QCustomPlot类 18 | 19 | QCustomPlot类管理着所有的图层，它默认自带了六个图层，分别是： 20 | 21 | 1. 背景层`background` 22 | 2. 网格层`grid` 23 | 3. 绘图层`main` 24 | 4. 坐标轴层`axes` 25 | 5. 图例层`legend` 26 | 6. overlay层`overlay` 27 | 28 | 依据层的顺序的不同，绘制的顺序也不同，越在底下的层越早绘制，当前层默认为绘图层`main` 29 | 30 | 而我们的绘图区域则在QCPAxisRect中，QCustomPlot类默认包含一个QCPAxisRect，我们可以在下图中可以看到一个QCPAxisRect一般来说会有上轴`xAxis2`、下轴`xAxis`、左轴`yAxis`和右轴`yAxis2`四个轴 31 | 32 | ![QCPAxisRect和QCPAxis的关系图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0wZjdhYzdiYWQzMzI2YTEwLnBuZw?x-oss-process=image/format,png#pic_center) 33 | 34 | 35 | 36 | ## 四、简单使用 37 | 38 | 我们以官方的一个简单示例来结束这篇 39 | ``` 40 | void MainWindow::setupQuadraticDemo(QCustomPlot *customPlot) 41 | { 42 | QVector x(101), y(101); 43 | for (int i = 0; i < 101; ++i) { 44 | x[i] = i / 50.0 - 1; // -1 到 1 45 | y[i] = x[i] * x[i]; 46 | } 47 | 48 | customPlot->addGraph(); // 添加一个曲线图QGraph 49 | customPlot->graph(0)->setData(x, y); // 为曲线图添加数据 50 | customPlot->graph(0)->setName("第一个示例"); // 设置曲线图的名字 51 | customPlot->xAxis->setLabel("x"); // 设置x轴的标签 52 | customPlot->yAxis->setLabel("y"); 53 | customPlot->xAxis->setRange(-1, 1); // 设置x轴的范围为(-1,1) 54 | customPlot->yAxis->setRange(0, 1); 55 | customPlot->legend->setVisible(true); // 显示图例 56 | } 57 | ``` 58 | 59 | 效果图 60 | 61 | ![demo1.png](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC01YWRjZjMzYWU1NmMxYmY5LnBuZw?x-oss-process=image/format,png#pic_center) 62 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之柱状图（三）.md: -------------------------------------------------------------------------------- 1 | 在QCustomPlot中，柱状图需要使用QCPBars类， QCPBars的使用很简单 2 | 3 | #### 竖向柱状图 4 | 创建一个柱状图，并且设置它的风格 5 | ``` 6 | QCPAxis *keyAxis = customPlot->xAxis; 7 | QCPAxis *valueAxis = customPlot->yAxis; 8 | QCPBars *fossil = new QCPBars(keyAxis, valueAxis); // 使用xAxis作为柱状图的key轴，yAxis作为value轴 9 | 10 | fossil->setAntialiased(false); // 为了更好的边框效果，关闭抗齿锯 11 | fossil->setName("Fossil fuels"); // 设置柱状图的名字，可在图例中显示 12 | fossil->setPen(QPen(QColor(0, 168, 140).lighter(130))); // 设置柱状图的边框颜色 13 | fossil->setBrush(QColor(0, 168, 140)); // 设置柱状图的画刷颜色 14 | ``` 15 | 16 | 之后，我们为柱状图的key轴设置一个文字类型的轴 17 | ``` 18 | // 为柱状图设置一个文字类型的key轴，ticks决定了轴的范围，而labels决定了轴的刻度文字的显示 19 | QVector ticks; 20 | QVector labels; 21 | ticks << 1 << 2 << 3 << 4 << 5 << 6 << 7; 22 | labels << "USA" << "Japan" << "Germany" << "France" << "UK" << "Italy" << "Canada"; 23 | QSharedPointer textTicker(new QCPAxisTickerText); 24 | textTicker->addTicks(ticks, labels); 25 | 26 | keyAxis->setTicker(textTicker); // 设置为文字轴 27 | ``` 28 | 29 | 设置柱状图轴范围，并且为其添加数据数据 30 | ``` 31 | keyAxis->setTickLabelRotation(60); // 轴刻度文字旋转60度 32 | keyAxis->setSubTicks(false); // 不显示子刻度 33 | keyAxis->setTickLength(0, 4); // 轴内外刻度的长度分别是0,4,也就是轴内的刻度线不显示 34 | keyAxis->setRange(0, 8); // 设置范围 35 | keyAxis->setUpperEnding(QCPLineEnding::esSpikeArrow); 36 | 37 | valueAxis->setRange(0, 12.1); 38 | valueAxis->setPadding(35); // 轴的内边距，可以到QCustomPlot之开始（一）看图解 39 | valueAxis->setLabel("Power Consumption in\nKilowatts per Capita (2007)"); 40 | valueAxis->setUpperEnding(QCPLineEnding::esSpikeArrow); 41 | QVector fossilData; 42 | fossilData << 0.86*10.5 << 0.83*5.5 << 0.84*5.5 << 0.52*5.8 << 0.89*5.2 << 0.90*4.2 << 0.67*11.2; 43 | fossil->setData(ticks, fossilData); 44 | ``` 45 | ![竖向柱状图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC01ZmQwNjFlYmFmZTlmODc0LnBuZw?x-oss-process=image/format,png#pic_center) 46 | 47 | #### 横向柱状图 48 | 49 | 横向柱状图也很简单，只要设置key轴为y轴，value轴为x轴即可 50 | ``` 51 | QCPAxis *keyAxis = customPlot->yAxis; 52 | QCPAxis *valueAxis = customPlot->xAxis; 53 | ``` 54 | 55 | ![横向柱状图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC02MGE1Y2UwZWFmNzRiNDk0LnBuZw?x-oss-process=image/format,png#pic_center) 56 | 57 | #### 柱状堆积图 58 | 为了展示堆积图，我们再添加了两个柱状图 59 | ``` 60 | QCPBars *regen = new QCPBars(keyAxis, valueAxis); 61 | QCPBars *nuclear = new QCPBars(keyAxis, valueAxis); 62 | QCPBars *fossil = new QCPBars(keyAxis, valueAxis); // 使用xAxis作为柱状图的key轴，yAxis作为value轴 63 | ``` 64 | 65 | 设置它们的数据 66 | ``` 67 | QVector fossilData, nuclearData, regenData; 68 | fossilData << 0.86*10.5 << 0.83*5.5 << 0.84*5.5 << 0.52*5.8 << 0.89*5.2 << 0.90*4.2 << 0.67*11.2; 69 | nuclearData << 0.08*10.5 << 0.12*5.5 << 0.12*5.5 << 0.40*5.8 << 0.09*5.2 << 0.00*4.2 << 0.07*11.2; 70 | regenData << 0.06*10.5 << 0.05*5.5 << 0.04*5.5 << 0.06*5.8 << 0.02*5.2 << 0.07*4.2 << 0.25*11.2; 71 | fossil->setData(ticks, fossilData); 72 | nuclear->setData(ticks, nuclearData); 73 | regen->setData(ticks, regenData); 74 | ``` 75 | 76 | 接下来设置堆积方式 77 | ``` 78 | regen->setStackingGap(1); // 设置堆积在其它柱状图上时的间距(像素) 79 | nuclear->setStackingGap(1); 80 | 81 | nuclear->moveAbove(fossil); // 将nuclear移到fossil之上 82 | regen->moveAbove(nuclear); 83 | ``` 84 | 85 | ![柱状堆积图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC00YmY2ZTI1NzJiZjk4YjNiLnBuZw?x-oss-process=image/format,png#pic_center) 86 | 87 | #### 柱状分组图 88 | 柱状分组图需要引入一个新的类：`QCPBarsGroup`，首先注释掉上面的`堆积方式`的代码 89 | 90 | ``` 91 | QCPBarsGroup *group = new QCPBarsGroup(customPlot); 92 | 93 | QList bars; 94 | bars << fossil << nuclear << regen; 95 | 96 | foreach (QCPBars *bar, bars) { 97 | // 设置柱状图的宽度类型为以key坐标轴计算宽度的大小，其实默认就是这种方式 98 | bar->setWidthType(QCPBars::wtPlotCoords); 99 | bar->setWidth(bar->width() / bars.size()); // 设置柱状图的宽度大小 100 | group->append(bar); // 将柱状图加入柱状图分组中 101 | } 102 | 103 | group->setSpacingType(QCPBarsGroup::stAbsolute); // 设置组内柱状图的间距，按像素 104 | group->setSpacing(2); // 设置较小的间距值，这样看起来更紧凑 105 | ``` 106 | 107 | ![柱状分组图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1jNjY2YTM3NWIyZTYwOGY3LnBuZw?x-oss-process=image/format,png#pic_center) 108 | 109 | #### 柱状图宽度类型和柱状分组图间距类型 110 | 111 | 柱状图有三种宽度类型，分别是： 112 | 113 | * QCPBars::wtAbsolute 宽度是绝对像素大小，即setWidth设置为多少就是多少 114 | * QCPBars::wtAxisRectRatio 宽度大小是以QCPAxisRect的大小决定的，当key轴为水平的时候，宽度大小为setWidth设置的比例值乘以QCPAxisRect的宽度;key轴为垂直的时候，是乘以QCPAxisRect的高度 115 | * QCPBars::wtPlotCoords 宽度大小是以key坐标轴刻度位置以及setWidth设置的值确定，宽度的计算方式为当前key±width 116 | 117 | 柱状分组图的间距类型和柱状图的宽度类型是类似的 118 | 119 | #### 在柱状图上显示值 120 | 有时候我们需要在柱状图上显示具体的值，这时我们仅需继承`QCPBars` 121 | 122 | ``` 123 | // 头文件CustomBars.h 124 | class CustomBars : public QCPBars 125 | { 126 | public: 127 | explicit CustomBars(QCPAxis *keyAxis, QCPAxis *valueAxis); 128 | 129 | Qt::Alignment textAligment() const { return mTextAlignment; } 130 | double spacing() const { return mSpacing; } 131 | QFont font() const { return mFont; } 132 | 133 | void setTextAlignment(Qt::Alignment alignment); 134 | void setSpacing(double spacing); 135 | void setFont(const QFont &font); 136 | 137 | protected: 138 | Qt::Alignment mTextAlignment; // 文字对齐方式 139 | double mSpacing; // 文字与柱状图的间距，这里按像素大小 140 | QFont mFont; // 文字使用的字体 141 | 142 | virtual void draw(QCPPainter *painter) Q_DECL_OVERRIDE; 143 | }; 144 | ``` 145 | 146 | ``` 147 | // 源文件CustomBars.cpp 148 | CustomBars::CustomBars(QCPAxis *keyAxis, QCPAxis *valueAxis) 149 | : QCPBars (keyAxis, valueAxis), 150 | mTextAlignment(Qt::AlignCenter), 151 | mSpacing(5), 152 | mFont(QFont(QLatin1String("sans serif"), 12)) 153 | { 154 | 155 | } 156 | 157 | void CustomBars::setTextAlignment(Qt::Alignment alignment) 158 | { 159 | mTextAlignment = alignment; 160 | } 161 | 162 | void CustomBars::setSpacing(double spacing) 163 | { 164 | mSpacing = spacing; 165 | } 166 | 167 | void CustomBars::setFont(const QFont &font) 168 | { 169 | mFont = font; 170 | } 171 | ``` 172 | 173 | **draw函数的绘制** 我们直接拷贝QCPBars的draw函数源码过来，在其上面修改即可 174 | ``` 175 | // 源文件CustomBars.cpp 176 | void CustomBars::draw(QCPPainter *painter) 177 | { 178 | 179 | // 以上是拷贝的源码部分 180 | painter->drawPolygon(barRect); 181 | 182 | // 我们仅需在 painter->drawPolygon(barRect); 这行下增加以下的内容即可 183 | 184 | // 计算文字的位置 185 | painter->setFont(mFont); // 设置字体 186 | QString text = QString text = QString::number(it->value, 'g', 2); // 取得当前value轴的值，保留两位精度 187 | 188 | QRectF textRect = painter->fontMetrics().boundingRect(0, 0, 0, 0, Qt::TextDontClip | mTextAlignment, text); // 计算文字所占用的大小 189 | 190 | if (mKeyAxis.data()->orientation() == Qt::Horizontal) { // 当key轴为水平轴的时候 191 | if (mKeyAxis.data()->axisType() == QCPAxis::atTop) // 上轴，移动文字到柱状图下面 192 | textRect.moveTopLeft(barRect.bottomLeft() + QPointF(0, mSpacing)); 193 | else // 下轴，移动文字到柱状图上面 194 | textRect.moveBottomLeft(barRect.topLeft() - QPointF(0, mSpacing)); 195 | textRect.setWidth(barRect.width()); 196 | painter->drawText(textRect, Qt::TextDontClip | mTextAlignment, text); 197 | } else { // 当key轴为竖直轴的时候 198 | if (mKeyAxis.data()->axisType() == QCPAxis::atLeft) // 左轴，移动文字到柱状图右边 199 | textRect.moveTopLeft(barRect.topRight() + QPointF(mSpacing, 0)); 200 | else // 右轴，移动文字到柱状图左边 201 | textRect.moveTopRight(barRect.topLeft() - QPointF(mSpacing, 0)); 202 | textRect.setHeight(barRect.height()); 203 | painter->drawText(textRect, Qt::TextDontClip | mTextAlignment, text); 204 | } 205 | 206 | // 以下是拷贝的源码部分 207 | } 208 | ``` 209 | 210 | 使用很简单，仅需将`QCPBars`替换成`CustomBars` 211 | ``` 212 | CustomBars *regen = new CustomBars(keyAxis, valueAxis); 213 | CustomBars *nuclear = new CustomBars(keyAxis, valueAxis); 214 | CustomBars *fossil = new CustomBars(keyAxis, valueAxis); // 使用xAxis作为柱状图的key轴，yAxis作为value轴 215 | ``` 216 | 217 | ![在柱状图上显示数值](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC02M2NhNTYxZDk4ZmZhZTIyLnBuZw?x-oss-process=image/format,png#pic_center) 218 | 219 | #### 最后补充一点 220 | 我们可以通过`setBaseValue`函数设置柱状图的起点位置，这个函数仅对最底下的柱状图有效果（即其没有堆积在别的柱状图之上） 221 | ``` 222 | foreach (QCPBars *bar, bars) { 223 | // 设置柱状图的宽度类型为以key坐标轴计算宽度的大小，其实默认就是这种方式 224 | bar->setBaseValue(2.5); // 设置柱状图的起点为value轴值为2.5的位置 225 | } 226 | ``` 227 | 228 | ![设置柱状图起点位置](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC03YjgzYjcwNGRmNmQ4MzYxLnBuZw?x-oss-process=image/format,png#pic_center) 229 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之简单动态图（六）.md: -------------------------------------------------------------------------------- 1 | 本章节是仿照echart的动态图：[地址](https://www.echartsjs.com/examples/zh/editor.html?c=dynamic-data) 2 | 3 | ![最终效果图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC0yNzdhZDU4ZWQ5ZjFmYzliLmdpZg#pic_center) 4 | 5 | #### 一、设置布局 6 | 7 | 首先新增一行一列用于放置标题和图例，这里将图例放置在一个空的轴矩形当中--[QCustomPlot之层和布局（四）](https://www.jianshu.com/p/4c4c0e2d01e8) 8 | 9 | 10 | ``` 11 | // setupDynamicData(QCustomPlot *customPlot) 函数中 12 | customPlot->plotLayout()->insertRow(0); 13 | customPlot->plotLayout()->insertColumn(0); 14 | 15 | QCPAxisRect *legendRect = new QCPAxisRect(customPlot, false); // 不需要配置轴，因为我们只是把图例放在这里 16 | legendRect->setAutoMargins(QCP::msNone); // 不计算边距 17 | legendRect->insetLayout()->addElement(customPlot->legend, Qt::AlignCenter); // 放置图例 18 | customPlot->legend->setVisible(true); 19 | customPlot->legend->setFillOrder(QCPLayoutGrid::foColumnsFirst); // 横向图例 20 | 21 | customPlot->axisRect()->setAutoMargins(QCP::msBottom | QCP::msRight); // 只计算下边距和右边距 22 | customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, "动态数据", QFont("sans", 12, QFont::Bold))); 23 | customPlot->plotLayout()->addElement(0, 1, legendRect); 24 | customPlot->plotLayout()->setRowStretchFactor(0, 0.1); // 让其尽可能小一点 25 | customPlot->plotLayout()->setColumnStretchFactor(0, 0.1); 26 | ``` 27 | 28 | #### 二、设置图表 29 | 30 | 其次添加一个柱状图和折线图，并且添加它们的数据，注意这里采用`QCPAxisTickerText`而不采用`QCPAxisTickerTime`或者`QCPAxisTickerDateTime`的原因，是因为我们不想要它们计算刻度线的位置，同时要注意让`xAxis2`保持与`xAxis`的联动，这里只需连接信号槽即可 31 | 32 | ``` 33 | // setupDynamicData(QCustomPlot *customPlot) 函数中 34 | // 设置柱状图 35 | QCPBars *bar = new QCPBars(customPlot->xAxis, customPlot->yAxis2); 36 | bar->setName("预购队列"); 37 | bar->setPen(Qt::NoPen); 38 | bar->setBrush(QColor(194, 53, 49)); 39 | 40 | // 设置折线图 41 | QCPGraph *graph = customPlot->addGraph(customPlot->xAxis, customPlot->yAxis); 42 | graph->setName("最新成交价"); 43 | graph->setPen(QPen(QColor(47, 69, 84), 2)); 44 | graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(47, 69, 84), QColor(Qt::white), 4)); 45 | 46 | customPlot->yAxis->setLabel("价格"); 47 | customPlot->yAxis->setRange(0, 30); 48 | customPlot->yAxis->setSubTicks(false); // 设置子刻度线不显示 49 | customPlot->yAxis->setTickLength(0, 6); // 设置刻度线内外的长度 50 | customPlot->yAxis2->setLabel("预购量"); 51 | customPlot->yAxis2->setVisible(true); 52 | customPlot->yAxis2->setRange(0, 1200); 53 | customPlot->yAxis2->setSubTicks(false); 54 | customPlot->yAxis2->setTickLength(0, 6); 55 | 56 | // 这里之所以用 QCPAxisTickerText，而不用 QCPAxisTickerTime / QCPAxisTickerDateTime 是因为它们会自动计算刻度线的位置，这是我们不想要的 57 | QSharedPointer timeTicker(new QCPAxisTickerText); 58 | QSharedPointer indexTicker(new QCPAxisTickerText); 59 | customPlot->xAxis->setTicker(timeTicker); 60 | customPlot->xAxis->setSubTicks(false); 61 | customPlot->xAxis2->setVisible(true); 62 | customPlot->xAxis2->setSubTicks(false); 63 | customPlot->xAxis2->setTicker(indexTicker); 64 | connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange))); // 重要：让xAxis2与xAxis保持联动 65 | 66 | // 添加数据 67 | QVector datax, datay1, datay2; 68 | QTime now = QTime::currentTime(); 69 | for (int i = 0; i < 8; ++i) { 70 | mLabels.insert(0, now.toString("hh:mm:ss")); // mLabels == QVector 71 | datax.insert(0, now.msecsSinceStartOfDay() / 1000.0); // 时间 72 | now = now.addMSecs(-2000); 73 | 74 | mIndexLabels.insert(0, QString::number(8 - i)); 75 | datay1.insert(0, QRandomGenerator::global()->bounded(20) + 5); // 产生随机数，Qt 5.10 以下用qrand() % 20 76 | datay2.insert(0, QRandomGenerator::global()->bounded(1000)); 77 | } 78 | 79 | mIndex = 8; 80 | mPositions = datax; // mPositions == QVector 81 | 82 | graph->setData(datax, datay1); 83 | bar->setData(datax, datay2); 84 | 85 | timeTicker->setTicks(mPositions, mLabels); // 设置刻度线位置和刻度标签 86 | indexTicker->setTicks(mPositions, mIndexLabels); 87 | 88 | customPlot->xAxis->rescale(); 89 | customPlot->xAxis->scaleRange(1.1); // 稍微缩放一下，以显示全部 90 | ``` 91 | 92 | #### 三、连接计时信号槽 93 | ``` 94 | // setupDynamicData(QCustomPlot *customPlot) 函数中 95 | connect(&dataTimer, SIGNAL(timeout()), this, SLOT(dynamicDataSlot())); 96 | dataTimer.start(2000); // 2秒刷新一次 97 | ``` 98 | 99 | #### 四、设置数据刷新的槽函数 100 | 101 | 以下都是在`dynamicDataSlot`槽函数中 102 | 103 | - 去除之前的数据 104 | 105 | ``` 106 | QCPBars *bar = static_cast(ui->customPlot->plottable(0)); 107 | 108 | // 移除第一个数据 109 | bar->data()->remove(mPositions.first()); 110 | ui->customPlot->graph(0)->data()->remove(mPositions.first()); 111 | 112 | mPositions.removeFirst(); 113 | mLabels.removeFirst(); 114 | mIndexLabels.removeFirst(); 115 | ``` 116 | 117 | - 添加新增数据 118 | 119 | ``` 120 | // 计算当前时间 121 | double key = QTime::currentTime().msecsSinceStartOfDay() / 1000.0; 122 | QString label = QTime::currentTime().toString("hh:mm:ss"); 123 | 124 | ui->customPlot->graph(0)->addData(key, QRandomGenerator::global()->bounded(20) + 5); 125 | bar->addData(key, QRandomGenerator::global()->bounded(1000)); 126 | 127 | mPositions.push_back(key); 128 | mLabels.push_back(label); 129 | mIndexLabels.push_back(QString::number(++mIndex)); 130 | ``` 131 | 132 | - 重新设置轴并刷新图表 133 | 134 | ``` 135 | QCPAxisTickerText *timeTicker = static_cast(ui->customPlot->xAxis->ticker().data()); 136 | timeTicker->setTicks(mPositions, mLabels); // 重新设置x轴 137 | 138 | QCPAxisTickerText *indexTicker = static_cast(ui->customPlot->xAxis2->ticker().data()); 139 | indexTicker->setTicks(mPositions, mIndexLabels); 140 | 141 | ui->customPlot->xAxis->rescale(); 142 | ui->customPlot->xAxis->scaleRange(1.1); 143 | 144 | ui->customPlot->replot(); 145 | ``` 146 | 147 | -------------------------------------------------------------------------------- /docs/zh-cn/QCustomPlot之轴矩形和轴（五）.md: -------------------------------------------------------------------------------- 1 | #### 轴矩形QCPAxisRect 2 | 3 | 轴矩形的作用主要有以下几种： 4 | 5 | - 背景绘制，所以轴矩形默认存在于`background`层 6 | - 管理多个轴，并不仅限于上下左右四个轴 7 | - 图表的拖拽和缩放 8 | 9 | 先来看下轴矩形的构造函数，可以看到，轴矩形管理着上下左右四个方向的轴，同时当`setupDefaultAxes`为true时(默认为true)时，将会添加上下左右四个轴，并且设置下轴(x轴)和左轴(y轴)为拖拽和缩放时影响的轴 10 | 11 | ``` 12 | QCPAxisRect::QCPAxisRect(QCustomPlot *parentPlot, bool setupDefaultAxes) 13 | : QCPLayoutElement(parentPlot), 14 | mBackgroundBrush(Qt::NoBrush), 15 | mBackgroundScaled(true), 16 | mBackgroundScaledMode(Qt::KeepAspectRatioByExpanding), 17 | mInsetLayout(new QCPLayoutInset), 18 | mRangeDrag(Qt::Horizontal | Qt::Vertical), // 水平和竖直方向都可以拖拽 19 | mRangeZoom(Qt::Horizontal | Qt::Vertical), // 水平和竖直方向都可以缩放 20 | mRangeZoomFactorHorz(0.85), // 水平缩放比例 21 | mRangeZoomFactorVert(0.85), // 竖直缩放比例 22 | mDragging(false) 23 | { 24 | // 其余无关代码 25 | 26 | mAxes.insert(QCPAxis::atLeft, QList()); 27 | mAxes.insert(QCPAxis::atRight, QList()); 28 | mAxes.insert(QCPAxis::atTop, QList()); 29 | mAxes.insert(QCPAxis::atBottom, QList()); 30 | 31 | if (setupDefaultAxes) { 32 | QCPAxis *xAxis = addAxis(QCPAxis::atBottom); 33 | QCPAxis *yAxis = addAxis(QCPAxis::atLeft); 34 | QCPAxis *xAxis2 = addAxis(QCPAxis::atTop); 35 | QCPAxis *yAxis2 = addAxis(QCPAxis::atRight); 36 | setRangeDragAxes(xAxis, yAxis); // 设置拖拽时影响的轴 37 | setRangeZoomAxes(xAxis, yAxis); // 设置缩放时影响的轴 38 | 39 | // 其余无关代码 40 | } 41 | } 42 | ``` 43 | 44 | 45 | 于是我们可以知道，轴矩形是怎么影响图表的拖拽和缩放的： 46 | 1. mRangeDrag、mRangeZoom作用的方向，由setRangeDrag和setRangeZoom函数设置 47 | 2. setRangeDragAxes和setRangeZoomAxes函数设置的拖拽和缩放时影响的轴(可以是多个轴) 48 | 49 | 50 | 同时轴矩形还提供了函数zoom函数，可以很方便的实现矩形框选缩放的功能 51 | 52 | #### 轴QCPAxis 53 | 54 | 轴的作用主要是：决定图表的范围 55 | 56 | 轴主要由四部分组成： 57 | - 轴线及刻度线 58 | - 轴刻度文字 59 | - 轴标签 60 | - 网格线 61 | 62 | QCPAxis可以为多个图表所共有，同时它提供了非常丰富的接口用于设置上述组成部分的风格，[QCustomPlot之个性化外观（二）](https://www.jianshu.com/p/bdd8b363e6b7)的内容 63 | 64 | QCustomPlot还为我们提供了几种默认的轴（ticker, 其实是用于产生刻度和刻度文字的）： 65 | - QCPAxisTickerFixed // 固定步进的轴 66 | - QCPAxisTickerLog // log轴 67 | - QCPAxisTickerPi // Pi轴 68 | - QCPAxisTickerText // 文字轴 69 | - QCPAxisTickerDateTime // 日期轴 70 | - QCPAxisTickerTime // 时间轴 71 | 72 | 使用**setTicker**函数设置相应的ticker就可以了 73 | 74 | ![多种轴类型](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC02NjQxMTc0ZjRkYjI1ZjNkLnBuZw?x-oss-process=image/format,png#pic_center) 75 | 76 | **setNumberFormat**函数的介绍：用于轴标签文字的显示格式，可以由以下三个字符组成 77 | - 第一个字符可以为：'e'/'E'、'g'/'G'、'f'，这里使用了Qt的显示风格 78 | - 第二个字符必须为：'b'，当且仅当第一个字符为'e'(科学计数法)或者'g'(精度为最大有效位数)时才有效，b即beautiful，可以让轴刻度文字看起来更好看 79 | - 第三个字符可以为：'c'(cross)、'd'(dot)，即表现为乘号或者点 80 | 81 | 82 | #### 总结 83 | - 轴矩形可以拥有多个轴 84 | - 多个图表可以共用一个轴 85 | - QCustomPlot可以存在多个轴矩形，因为轴矩形继承自`QCPLayoutElement` 86 | 87 | 88 | ``` 89 | void MainWindow::setupAdvancedAxesDemo(QCustomPlot *customPlot) 90 | { 91 | demoName = "Advanced Axes Demo"; 92 | 93 | customPlot->plotLayout()->clear(); // 首先清空默认的轴矩形，让我们从头开始 94 | QCPAxisRect *wideAxisRect = new QCPAxisRect(customPlot, true); // 还记得setupDefaultAxes为true时的作用吗，忘了的话翻上去看吧 95 | wideAxisRect->setupFullAxesBox(true); // 让四个轴关联，并全部显示出来 96 | wideAxisRect->addAxis(QCPAxis::atLeft)->setTickLabelColor(QColor("#6050F8")); // 在左边多添加一个轴并且设置它的颜色 97 | 98 | QCPLayoutGrid *subLayout = new QCPLayoutGrid; 99 | customPlot->plotLayout()->addElement(0, 0, wideAxisRect); // 在第一行添加轴矩形 100 | customPlot->plotLayout()->addElement(1, 0, subLayout); // 在第二行添加一个子布局，后面会添加两个轴矩形在里面 101 | 102 | QCPAxisRect *subRectLeft = new QCPAxisRect(customPlot, false); // 不配置轴 103 | QCPAxisRect *subRectRight = new QCPAxisRect(customPlot, false); 104 | 105 | // 让右边的轴矩形固定大小 106 | subRectRight->setMaximumSize(100, 100); 107 | subRectRight->setMinimumSize(100, 100); 108 | 109 | subLayout->addElement(0, 0, subRectLeft); // 在第一列添加轴矩形 110 | subLayout->addElement(0, 1, subRectRight); // 在第二列添加轴矩形 111 | 112 | subRectLeft->addAxes(QCPAxis::atBottom | QCPAxis::atLeft); // 添加下轴和左轴 113 | subRectRight->addAxes(QCPAxis::atBottom | QCPAxis::atRight); // 添加下轴和右轴 114 | subRectLeft->axis(QCPAxis::atLeft)->ticker()->setTickCount(2); // 设置轴的刻度为一个固定的步进值 115 | subRectRight->axis(QCPAxis::atRight)->ticker()->setTickCount(2); 116 | subRectLeft->axis(QCPAxis::atBottom)->grid()->setVisible(true); 117 | 118 | // 保持一个好的习惯，将它们放置在相应的层 119 | foreach (auto *rect, customPlot->axisRects()) { 120 | foreach (auto *axis, rect->axes()) { 121 | axis->setLayer("axes"); 122 | axis->grid()->setLayer("grid"); 123 | } 124 | } 125 | 126 | // 准备数据 127 | QVector dataCos(21), dataGauss(50), dataRandom(100); 128 | QVector x3, y3; 129 | qsrand(3); 130 | for (int i=0; iaddGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft)); 147 | mainGraphCos->data()->set(dataCos); 148 | mainGraphCos->valueAxis()->setRange(-1, 1); 149 | mainGraphCos->rescaleKeyAxis(); 150 | mainGraphCos->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(Qt::black), QBrush(Qt::white), 6)); 151 | mainGraphCos->setPen(QPen(QColor(120, 120, 120), 2)); 152 | 153 | QCPGraph *mainGraphGauss = customPlot->addGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft, 1)); 154 | mainGraphGauss->data()->set(dataGauss); 155 | mainGraphGauss->setPen(QPen(QColor("#8070B8"), 2)); 156 | mainGraphGauss->setBrush(QColor(110, 170, 110, 30)); 157 | mainGraphCos->setChannelFillGraph(mainGraphGauss); 158 | mainGraphCos->setBrush(QColor(255, 161, 0, 50)); 159 | mainGraphGauss->valueAxis()->setRange(0, 1000); 160 | mainGraphGauss->rescaleKeyAxis(); 161 | 162 | QCPGraph *subGraphRandom = customPlot->addGraph(subRectLeft->axis(QCPAxis::atBottom), subRectLeft->axis(QCPAxis::atLeft)); 163 | subGraphRandom->data()->set(dataRandom); 164 | subGraphRandom->setLineStyle(QCPGraph::lsImpulse); 165 | subGraphRandom->setPen(QPen(QColor("#FFA100"), 1.5)); 166 | subGraphRandom->rescaleAxes(); 167 | 168 | QCPBars *subBars = new QCPBars(subRectRight->axis(QCPAxis::atBottom), subRectRight->axis(QCPAxis::atRight)); 169 | subBars->setWidth(3/(double)x3.size()); 170 | subBars->setData(x3, y3); 171 | subBars->setPen(QPen(Qt::black)); 172 | subBars->setAntialiased(false); 173 | subBars->setAntialiasedFill(false); 174 | subBars->setBrush(QColor("#705BE8")); 175 | subBars->keyAxis()->setSubTicks(false); 176 | subBars->rescaleAxes(); 177 | 178 | // 给柱状图一个固定步进轴 179 | QSharedPointer intTicker(new QCPAxisTickerFixed); 180 | intTicker->setTickStep(1.0); 181 | intTicker->setScaleStrategy(QCPAxisTickerFixed::ssMultiples); 182 | subBars->keyAxis()->setTicker(intTicker); 183 | } 184 | ``` 185 | 186 | ![多个轴与多个轴矩形的效果图](https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xOTA3NTIxMC1jMWJjNDBhM2MyNmM4NTE0LnBuZw?x-oss-process=image/format,png#pic_center) 187 | -------------------------------------------------------------------------------- /src/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | cmake_minimum_required(VERSION 3.5) 2 | project(qcustomplot-manual) 3 | 4 | set(ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR}/..) 5 | set(EXECUTABLE_OUTPUT_PATH ${ROOT_PATH}/bin) 6 | set(LIBRARY_OUTPUT_PATH ${ROOT_PATH}/bin) 7 | 8 | add_subdirectory(qcustomplot) 9 | add_subdirectory(examples) 10 | -------------------------------------------------------------------------------- /src/examples/001_start/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/001_start/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/001_start/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcustomplot.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | QCustomPlot* customPlot = new QCustomPlot; 8 | setCentralWidget(customPlot); 9 | 10 | setupQuadraticDemo(customPlot); 11 | } 12 | 13 | void MainWindow::setupQuadraticDemo(QCustomPlot *customPlot) 14 | { 15 | QVector x(101), y(101); 16 | for (int i = 0; i < 101; ++i) { 17 | x[i] = i / 50.0 - 1; // -1 到 1 18 | y[i] = x[i] * x[i]; 19 | } 20 | 21 | customPlot->addGraph(); // 添加一个曲线图QGraph 22 | customPlot->graph(0)->setData(x, y); // 为曲线图添加数据 23 | customPlot->graph(0)->setName(QString::fromLocal8Bit("第一个示例")); // 设置曲线图的名字 24 | customPlot->xAxis->setLabel("x"); // 设置x轴的标签 25 | customPlot->yAxis->setLabel("y"); 26 | customPlot->xAxis->setRange(-1, 1); // 设置x轴的范围为(-1,1) 27 | customPlot->yAxis->setRange(0, 1); 28 | customPlot->legend->setVisible(true); // 显示图例 29 | } 30 | -------------------------------------------------------------------------------- /src/examples/001_start/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | 6 | class QCustomPlot; 7 | 8 | class MainWindow : public QMainWindow 9 | { 10 | public: 11 | MainWindow(QWidget* parent = nullptr); 12 | 13 | void setupQuadraticDemo(QCustomPlot *customPlot); 14 | 15 | private: 16 | 17 | }; 18 | 19 | #endif // MAINWINDOW_H 20 | -------------------------------------------------------------------------------- /src/examples/003_bar_chart_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/003_bar_chart_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/003_bar_chart_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | 3 | #include 4 | #include 5 | 6 | #include "qcustomplot.h" 7 | #include "qcptextbars.h" 8 | 9 | MainWindow::MainWindow(QWidget *parent) 10 | : QMainWindow(parent) 11 | { 12 | mCustomPlot = new QCustomPlot; 13 | 14 | setWindowTitle("QCustomPlot: Bar Chart Demo"); 15 | 16 | QWidget* w = new QWidget; 17 | QVBoxLayout* layout = new QVBoxLayout; 18 | w->setLayout(layout); 19 | setCentralWidget(w); 20 | 21 | QStringList items; 22 | items << QString::fromLocal8Bit("竖向柱状图") 23 | << QString::fromLocal8Bit("横向柱状图") 24 | << QString::fromLocal8Bit("竖向堆积图") 25 | << QString::fromLocal8Bit("横向堆积图") 26 | << QString::fromLocal8Bit("竖向分组图") 27 | << QString::fromLocal8Bit("横向分组图") 28 | << QString::fromLocal8Bit("竖向文字显示") 29 | << QString::fromLocal8Bit("横向文字显示"); 30 | 31 | QComboBox* comboBox = new QComboBox; 32 | comboBox->addItems(items); 33 | connect(comboBox, QOverload::of(&QComboBox::currentIndexChanged), this, &MainWindow::setupDemo); 34 | 35 | layout->addWidget(comboBox); 36 | layout->addWidget(mCustomPlot); 37 | setupDemo(0); 38 | } 39 | 40 | void MainWindow::reset() 41 | { 42 | delete mCustomPlot; 43 | mCustomPlot = new QCustomPlot; 44 | centralWidget()->layout()->addWidget(mCustomPlot); 45 | 46 | mOrientation = Qt::Vertical; 47 | mIsStackedBar = false; 48 | mIsGroupBar = false; 49 | mTextVisible = false; 50 | } 51 | 52 | void MainWindow::setupDemo(int index) 53 | { 54 | reset(); 55 | 56 | switch (index) { 57 | case 0: mOrientation = Qt::Vertical; setupBarDemo(mCustomPlot); break; 58 | case 1: mOrientation = Qt::Horizontal; setupBarDemo(mCustomPlot); break; 59 | case 2: mOrientation = Qt::Vertical; mIsStackedBar = true; setupBarDemo(mCustomPlot); break; 60 | case 3: mOrientation = Qt::Horizontal; mIsStackedBar = true; setupBarDemo(mCustomPlot); break; 61 | case 4: mOrientation = Qt::Vertical; mIsGroupBar = true; setupBarDemo(mCustomPlot); break; 62 | case 5: mOrientation = Qt::Horizontal; mIsGroupBar = true; setupBarDemo(mCustomPlot); break; 63 | case 6: mOrientation = Qt::Vertical; mTextVisible = true; mIsGroupBar = true; setupBarDemo(mCustomPlot); break; 64 | case 7: mOrientation = Qt::Horizontal; mTextVisible = true; mIsGroupBar = true; setupBarDemo(mCustomPlot); break; 65 | } 66 | } 67 | 68 | void MainWindow::setupBarDemo(QCustomPlot *customPlot) 69 | { 70 | QCPAxis *keyAxis = customPlot->xAxis; 71 | QCPAxis *valueAxis = customPlot->yAxis; 72 | 73 | // 水平方向 74 | if (mOrientation == Qt::Horizontal) { 75 | keyAxis = customPlot->yAxis; 76 | valueAxis = customPlot->xAxis; 77 | } 78 | 79 | auto *regen = new QCPTextBars(keyAxis, valueAxis); 80 | auto *nuclear = new QCPTextBars(keyAxis, valueAxis); 81 | auto *fossil = new QCPTextBars(keyAxis, valueAxis); // 使用xAxis作为柱状图的key轴，yAxis作为value轴 82 | regen->setTextVisible(mTextVisible); 83 | nuclear->setTextVisible(mTextVisible); 84 | fossil->setTextVisible(mTextVisible); 85 | 86 | regen->setAntialiased(false); // 为了更好的边框效果，关闭抗齿锯 87 | nuclear->setAntialiased(false); // 为了更好的边框效果，关闭抗齿锯 88 | fossil->setAntialiased(false); // 为了更好的边框效果，关闭抗齿锯 89 | 90 | regen->setName("Regenerative"); 91 | regen->setPen(QPen(QColor(111, 9, 176).lighter(170))); 92 | regen->setBrush(QColor(111, 9, 176)); 93 | nuclear->setName("Nuclear"); 94 | nuclear->setPen(QPen(QColor(250, 170, 20).lighter(150))); 95 | nuclear->setBrush(QColor(250, 170, 20)); 96 | 97 | fossil->setName("Fossil fuels"); // 设置柱状图的名字，可在图例中显示 98 | fossil->setPen(QPen(QColor(0, 168, 140).lighter(130))); // 设置柱状图的边框颜色 99 | fossil->setBrush(QColor(0, 168, 140)); // 设置柱状图的画刷颜色 100 | 101 | // 为柱状图设置一个文字类型的key轴，ticks决定了轴的范围，而labels决定了轴的刻度文字的显示 102 | QVector ticks; 103 | QVector labels; 104 | ticks << 1 << 2 << 3 << 4 << 5 << 6 << 7; 105 | labels << "USA" << "Japan" << "Germany" << "France" << "UK" << "Italy" << "Canada"; 106 | QSharedPointer textTicker(new QCPAxisTickerText); 107 | textTicker->addTicks(ticks, labels); 108 | 109 | keyAxis->setTicker(textTicker); // 设置为文字轴 110 | 111 | keyAxis->setTickLabelRotation(60); // 轴刻度文字旋转60度 112 | keyAxis->setSubTicks(false); // 不显示子刻度 113 | keyAxis->setTickLength(0, 4); // 轴内外刻度的长度分别是0,4,也就是轴内的刻度线不显示 114 | keyAxis->setRange(0, 8); // 设置范围 115 | keyAxis->setUpperEnding(QCPLineEnding::esSpikeArrow); 116 | 117 | valueAxis->setRange(0, 12.1); 118 | valueAxis->setPadding(35); // 轴的内边距，可以到QCustomPlot之开始（一）看图解 119 | valueAxis->setLabel("Power Consumption in\nKilowatts per Capita (2007)"); 120 | valueAxis->setUpperEnding(QCPLineEnding::esSpikeArrow); 121 | QVector fossilData, nuclearData, regenData; 122 | fossilData << 0.86*10.5 << 0.83*5.5 << 0.84*5.5 << 0.52*5.8 << 0.89*5.2 << 0.90*4.2 << 0.67*11.2; 123 | nuclearData << 0.08*10.5 << 0.12*5.5 << 0.12*5.5 << 0.40*5.8 << 0.09*5.2 << 0.00*4.2 << 0.07*11.2; 124 | regenData << 0.06*10.5 << 0.05*5.5 << 0.04*5.5 << 0.06*5.8 << 0.02*5.2 << 0.07*4.2 << 0.25*11.2; 125 | fossil->setData(ticks, fossilData); 126 | nuclear->setData(ticks, nuclearData); 127 | regen->setData(ticks, regenData); 128 | 129 | if (mIsStackedBar) { 130 | regen->setStackingGap(1); // 设置堆积在其它柱状图上时的间距(像素) 131 | nuclear->setStackingGap(1); 132 | 133 | nuclear->moveAbove(fossil); 134 | regen->moveAbove(nuclear); // 将nuclear移到fossil之上 135 | } else if (mIsGroupBar) { 136 | QCPBarsGroup *group = new QCPBarsGroup(customPlot); 137 | 138 | QList bars; 139 | bars << fossil << nuclear << regen; 140 | 141 | foreach (QCPBars *bar, bars) { 142 | // 设置柱状图的宽度类型为以key坐标轴计算宽度的大小，其实默认就是这种方式 143 | bar->setWidthType(QCPBars::wtPlotCoords); 144 | bar->setWidth(bar->width() / bars.size()); // 设置柱状图的宽度大小 145 | group->append(bar); // 将柱状图加入柱状图分组中 146 | } 147 | 148 | group->setSpacingType(QCPBarsGroup::stAbsolute); // 设置组内柱状图的间距，按像素 149 | group->setSpacing(2); // 设置较小的间距值，这样看起来更紧凑 150 | } else { 151 | regen->setVisible(false); 152 | nuclear->setVisible(false); 153 | } 154 | 155 | customPlot->replot(); 156 | } 157 | 158 | 159 | -------------------------------------------------------------------------------- /src/examples/003_bar_chart_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | 6 | class QCustomPlot; 7 | 8 | class MainWindow : public QMainWindow 9 | { 10 | public: 11 | MainWindow(QWidget* parent = nullptr); 12 | 13 | void setupDemo(int index); 14 | void setupBarDemo(QCustomPlot* customPlot); 15 | 16 | protected: 17 | void reset(); 18 | 19 | private: 20 | QCustomPlot* mCustomPlot; 21 | Qt::Orientation mOrientation; 22 | 23 | bool mIsStackedBar = false; 24 | bool mIsGroupBar = false; 25 | bool mTextVisible = false; 26 | }; 27 | 28 | #endif // MAINWINDOW_H 29 | -------------------------------------------------------------------------------- /src/examples/004_layout_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/004_layout_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/004_layout_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | 3 | #include 4 | #include 5 | 6 | #include "qcustomplot.h" 7 | 8 | MainWindow::MainWindow(QWidget *parent) 9 | : QMainWindow(parent) 10 | { 11 | mCustomPlot = new QCustomPlot; 12 | 13 | setWindowTitle("QCustomPlot: Layout Demo"); 14 | 15 | QWidget* w = new QWidget; 16 | QVBoxLayout* layout = new QVBoxLayout; 17 | w->setLayout(layout); 18 | setCentralWidget(w); 19 | 20 | QStringList items; 21 | items << QString::fromLocal8Bit("对齐位置图例") 22 | << QString::fromLocal8Bit("自由位置图例") 23 | << QString::fromLocal8Bit("图例在QCustomPlot中"); 24 | QComboBox* comboBox = new QComboBox; 25 | comboBox->addItems(items); 26 | connect(comboBox, QOverload::of(&QComboBox::currentIndexChanged), this, &MainWindow::setupDemo); 27 | 28 | layout->addWidget(comboBox); 29 | layout->addWidget(mCustomPlot); 30 | setupDemo(0); 31 | } 32 | 33 | void MainWindow::reset() 34 | { 35 | delete mCustomPlot; 36 | mCustomPlot = new QCustomPlot; 37 | centralWidget()->layout()->addWidget(mCustomPlot); 38 | 39 | mOrientation = Qt::Vertical; 40 | mIsFreeLegend = false; 41 | mIsLegendInCustomPlot = false; 42 | } 43 | 44 | void MainWindow::setupDemo(int index) 45 | { 46 | reset(); 47 | 48 | switch (index) { 49 | case 0: setupLayoutDemo(mCustomPlot); break; 50 | case 1: mIsFreeLegend = true; setupLayoutDemo(mCustomPlot); break; 51 | case 2: mIsLegendInCustomPlot = true; setupLayoutDemo(mCustomPlot); break; 52 | } 53 | } 54 | 55 | void MainWindow::setupQuadraticDemo(QCustomPlot *customPlot) 56 | { 57 | QVector x(101), y(101); 58 | for (int i = 0; i < 101; ++i) { 59 | x[i] = i / 50.0 - 1; // -1 到 1 60 | y[i] = x[i] * x[i]; 61 | } 62 | 63 | auto keyAxis = customPlot->xAxis; 64 | auto valueAxis = customPlot->yAxis; 65 | 66 | if (mOrientation == Qt::Horizontal) { 67 | keyAxis = customPlot->yAxis; 68 | valueAxis = customPlot->xAxis; 69 | } 70 | 71 | customPlot->addGraph(keyAxis, valueAxis); // 添加一个曲线图QGraph 72 | customPlot->graph(0)->setName(QString::fromLocal8Bit("第一个示例")); // 设置曲线图的名字，用于QCPLegend显示 73 | 74 | customPlot->xAxis->setLabel("x"); // 设置x轴的标签 75 | customPlot->yAxis->setLabel("y"); 76 | customPlot->graph(0)->setData(x, y); 77 | customPlot->rescaleAxes(); 78 | } 79 | 80 | void MainWindow::setupLayoutDemo(QCustomPlot* customPlot) 81 | { 82 | setupQuadraticDemo(customPlot); 83 | customPlot->legend->setVisible(true); // 因为图例默认为隐藏的，所以让其显示 84 | // 设置图例标题 85 | QCPTextElement *title = new QCPTextElement(customPlot, QString::fromLocal8Bit("这是图例标题"), QFont("sans", 10, QFont::Bold)); 86 | title->setMargins(QMargins(0, 6, 0, 10)); // 为了效果更好，添加一些边距 87 | title->setLayer("legend"); // 一定要把标题的层设置为legend层 88 | customPlot->legend->insertRow(0); // 插入一行 89 | customPlot->legend->addElement(0, 0, title); // 在第一行第一列添加标题 90 | 91 | if (mIsFreeLegend) { 92 | customPlot->axisRect()->insetLayout()->setInsetPlacement(0, QCPLayoutInset::ipFree); 93 | customPlot->axisRect()->insetLayout()->setInsetRect(0, QRectF(0.6, 0.0, 0.2, 0.2)); // 这里按比例给出图例的位置，在QCPAxisRect的(60%,40%)的位置，宽高分别为QCPAxisRect的(20%,20%)宽高的大小 94 | } else { 95 | customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop | Qt::AlignHCenter); // 对齐于QCPAxisRect中间的顶部 96 | } 97 | 98 | if (mIsLegendInCustomPlot) { 99 | QCPAxisRect* legendAxisRect = new QCPAxisRect(customPlot, false); // 不需要配置轴，因为我们只是把图例放在这里 100 | legendAxisRect->insetLayout()->addElement(customPlot->legend, QRectF(0, 0, 1, 1)); // 添加图例，充满整个legendAxisRect 101 | 102 | // 添加到QCustomPlot中 103 | customPlot->plotLayout()->insertRow(0); 104 | customPlot->plotLayout()->addElement(0, 0, legendAxisRect); 105 | customPlot->plotLayout()->setRowStretchFactor(0, 0.1); 106 | 107 | // 设置边距对齐 108 | QCPMarginGroup* marginGroup = new QCPMarginGroup(customPlot); 109 | customPlot->axisRect(0)->setMarginGroup(QCP::msLeft | QCP::msRight, marginGroup); 110 | customPlot->axisRect(1)->setMarginGroup(QCP::msLeft | QCP::msRight, marginGroup); 111 | } 112 | 113 | // 设置图表标题 114 | customPlot->plotLayout()->insertRow(0); 115 | customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, QString::fromLocal8Bit("这里是QCustomPlot的标题"))); 116 | customPlot->plotLayout()->setMargins(QMargins(0, 10, 0, 10)); 117 | } 118 | 119 | -------------------------------------------------------------------------------- /src/examples/004_layout_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | 6 | class QCustomPlot; 7 | class QCPLayoutGrid; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | public: 12 | MainWindow(QWidget* parent = nullptr); 13 | 14 | void setupDemo(int index); 15 | void setupQuadraticDemo(QCustomPlot *customPlot); 16 | void setupLayoutDemo(QCustomPlot* customPlot); 17 | 18 | protected: 19 | void reset(); 20 | 21 | private: 22 | QCustomPlot* mCustomPlot; 23 | Qt::Orientation mOrientation; 24 | 25 | bool mIsFreeLegend = false; 26 | bool mIsLegendInCustomPlot = false; 27 | }; 28 | 29 | #endif // MAINWINDOW_H 30 | -------------------------------------------------------------------------------- /src/examples/005_axisrect_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/005_axisrect_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/005_axisrect_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcustomplot.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | QCustomPlot* customPlot = new QCustomPlot; 8 | setCentralWidget(customPlot); 9 | 10 | setupAdvancedAxesDemo(customPlot); 11 | } 12 | 13 | void MainWindow::setupAdvancedAxesDemo(QCustomPlot *customPlot) 14 | { 15 | customPlot->plotLayout()->clear(); // 首先清空默认的轴矩形，让我们从头开始 16 | QCPAxisRect *wideAxisRect = new QCPAxisRect(customPlot, true); // 还记得setupDefaultAxes为true时的作用吗，忘了的话翻上去看吧 17 | wideAxisRect->setupFullAxesBox(true); // 让四个轴关联，并全部显示出来 18 | wideAxisRect->addAxis(QCPAxis::atLeft)->setTickLabelColor(QColor("#6050F8")); // 在左边多添加一个轴并且设置它的颜色 19 | 20 | QCPLayoutGrid *subLayout = new QCPLayoutGrid; 21 | customPlot->plotLayout()->addElement(0, 0, wideAxisRect); // 在第一行添加轴矩形 22 | customPlot->plotLayout()->addElement(1, 0, subLayout); // 在第二行添加一个子布局，后面会添加两个轴矩形在里面 23 | 24 | QCPAxisRect *subRectLeft = new QCPAxisRect(customPlot, false); // 不配置轴 25 | QCPAxisRect *subRectRight = new QCPAxisRect(customPlot, false); 26 | 27 | // 让右边的轴矩形固定大小 28 | subRectRight->setMaximumSize(100, 100); 29 | subRectRight->setMinimumSize(100, 100); 30 | 31 | subLayout->addElement(0, 0, subRectLeft); // 在第一列添加轴矩形 32 | subLayout->addElement(0, 1, subRectRight); // 在第二列添加轴矩形 33 | 34 | subRectLeft->addAxes(QCPAxis::atBottom | QCPAxis::atLeft); // 添加下轴和左轴 35 | subRectRight->addAxes(QCPAxis::atBottom | QCPAxis::atRight); // 添加下轴和右轴 36 | subRectLeft->axis(QCPAxis::atLeft)->ticker()->setTickCount(2); // 设置轴的刻度为一个固定的步进值 37 | subRectRight->axis(QCPAxis::atRight)->ticker()->setTickCount(2); 38 | subRectLeft->axis(QCPAxis::atBottom)->grid()->setVisible(true); 39 | 40 | // 保持一个好的习惯，将它们放置在相应的层 41 | foreach (auto *rect, customPlot->axisRects()) { 42 | foreach (auto *axis, rect->axes()) { 43 | axis->setLayer("axes"); 44 | axis->grid()->setLayer("grid"); 45 | } 46 | } 47 | 48 | // 准备数据 49 | QVector dataCos(21), dataGauss(50), dataRandom(100); 50 | QVector x3, y3; 51 | qsrand(3); 52 | for (int i=0; iaddGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft)); 69 | mainGraphCos->data()->set(dataCos); 70 | mainGraphCos->valueAxis()->setRange(-1, 1); 71 | mainGraphCos->rescaleKeyAxis(); 72 | mainGraphCos->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(Qt::black), QBrush(Qt::white), 6)); 73 | mainGraphCos->setPen(QPen(QColor(120, 120, 120), 2)); 74 | 75 | QCPGraph *mainGraphGauss = customPlot->addGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft, 1)); 76 | mainGraphGauss->data()->set(dataGauss); 77 | mainGraphGauss->setPen(QPen(QColor("#8070B8"), 2)); 78 | mainGraphGauss->setBrush(QColor(110, 170, 110, 30)); 79 | mainGraphCos->setChannelFillGraph(mainGraphGauss); 80 | mainGraphCos->setBrush(QColor(255, 161, 0, 50)); 81 | mainGraphGauss->valueAxis()->setRange(0, 1000); 82 | mainGraphGauss->rescaleKeyAxis(); 83 | 84 | QCPGraph *subGraphRandom = customPlot->addGraph(subRectLeft->axis(QCPAxis::atBottom), subRectLeft->axis(QCPAxis::atLeft)); 85 | subGraphRandom->data()->set(dataRandom); 86 | subGraphRandom->setLineStyle(QCPGraph::lsImpulse); 87 | subGraphRandom->setPen(QPen(QColor("#FFA100"), 1.5)); 88 | subGraphRandom->rescaleAxes(); 89 | 90 | QCPBars *subBars = new QCPBars(subRectRight->axis(QCPAxis::atBottom), subRectRight->axis(QCPAxis::atRight)); 91 | subBars->setWidth(3/(double)x3.size()); 92 | subBars->setData(x3, y3); 93 | subBars->setPen(QPen(Qt::black)); 94 | subBars->setAntialiased(false); 95 | subBars->setAntialiasedFill(false); 96 | subBars->setBrush(QColor("#705BE8")); 97 | subBars->keyAxis()->setSubTicks(false); 98 | subBars->rescaleAxes(); 99 | 100 | // 给柱状图一个固定步进轴 101 | QSharedPointer intTicker(new QCPAxisTickerFixed); 102 | intTicker->setTickStep(1.0); 103 | intTicker->setScaleStrategy(QCPAxisTickerFixed::ssMultiples); 104 | subBars->keyAxis()->setTicker(intTicker); 105 | } 106 | 107 | -------------------------------------------------------------------------------- /src/examples/005_axisrect_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | 6 | class QCustomPlot; 7 | 8 | class MainWindow : public QMainWindow 9 | { 10 | public: 11 | MainWindow(QWidget* parent = nullptr); 12 | 13 | void setupAdvancedAxesDemo(QCustomPlot *customPlot); 14 | 15 | private: 16 | 17 | }; 18 | 19 | #endif // MAINWINDOW_H 20 | -------------------------------------------------------------------------------- /src/examples/006_dynamic_data_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/006_dynamic_data_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/006_dynamic_data_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcustomplot.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | mCustomPlot = new QCustomPlot; 8 | setCentralWidget(mCustomPlot); 9 | 10 | setupDynamicData(mCustomPlot); 11 | } 12 | 13 | void MainWindow::setupDynamicData(QCustomPlot *customPlot) 14 | { 15 | customPlot->plotLayout()->insertRow(0); 16 | customPlot->plotLayout()->insertColumn(0); 17 | 18 | QCPAxisRect *legendRect = new QCPAxisRect(customPlot, false); // 不需要配置轴，因为我们只是把图例放在这里 19 | legendRect->setAutoMargins(QCP::msNone); // 不计算边距 20 | legendRect->insetLayout()->addElement(customPlot->legend, Qt::AlignCenter); // 放置图例 21 | customPlot->legend->setVisible(true); 22 | customPlot->legend->setFillOrder(QCPLayoutGrid::foColumnsFirst); // 横向图例 23 | 24 | customPlot->axisRect()->setAutoMargins(QCP::msBottom | QCP::msRight); // 只计算下边距和右边距 25 | customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, QString::fromLocal8Bit("动态数据"), QFont("sans", 12, QFont::Bold))); 26 | customPlot->plotLayout()->addElement(0, 1, legendRect); 27 | customPlot->plotLayout()->setRowStretchFactor(0, 0.1); // 让其尽可能小一点 28 | customPlot->plotLayout()->setColumnStretchFactor(0, 0.1); 29 | 30 | // 设置柱状图 31 | QCPBars *bar = new QCPBars(customPlot->xAxis, customPlot->yAxis2); 32 | bar->setName(QString::fromLocal8Bit("预购队列")); 33 | bar->setPen(Qt::NoPen); 34 | bar->setBrush(QColor(194, 53, 49)); 35 | 36 | // 设置折线图 37 | QCPGraph *graph = customPlot->addGraph(customPlot->xAxis, customPlot->yAxis); 38 | graph->setName(QString::fromLocal8Bit("最新成交价")); 39 | graph->setPen(QPen(QColor(47, 69, 84), 2)); 40 | graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(47, 69, 84), QColor(Qt::white), 4)); 41 | 42 | customPlot->yAxis->setLabel(QString::fromLocal8Bit("价格")); 43 | customPlot->yAxis->setRange(0, 30); 44 | customPlot->yAxis->setSubTicks(false); // 设置子刻度线不显示 45 | customPlot->yAxis->setTickLength(0, 6); // 设置刻度线内外的长度 46 | customPlot->yAxis2->setLabel(QString::fromLocal8Bit("预购量")); 47 | customPlot->yAxis2->setVisible(true); 48 | customPlot->yAxis2->setRange(0, 1200); 49 | customPlot->yAxis2->setSubTicks(false); 50 | customPlot->yAxis2->setTickLength(0, 6); 51 | 52 | // 这里之所以用 QCPAxisTickerText，而不用 QCPAxisTickerTime / QCPAxisTickerDateTime 是因为它们会自动计算刻度线的位置，这是我们不想要的 53 | QSharedPointer timeTicker(new QCPAxisTickerText); 54 | QSharedPointer indexTicker(new QCPAxisTickerText); 55 | customPlot->xAxis->setTicker(timeTicker); 56 | customPlot->xAxis->setSubTicks(false); 57 | customPlot->xAxis2->setVisible(true); 58 | customPlot->xAxis2->setSubTicks(false); 59 | customPlot->xAxis2->setTicker(indexTicker); 60 | connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange))); // 重要：让xAxis2与xAxis保持联动 61 | 62 | // 添加数据 63 | QVector datax, datay1, datay2; 64 | QTime now = QTime::currentTime(); 65 | for (int i = 0; i < 8; ++i) { 66 | mLabels.insert(0, now.toString("hh:mm:ss")); // mLabels == QVector 67 | datax.insert(0, now.msecsSinceStartOfDay() / 1000.0); // 时间 68 | now = now.addMSecs(-2000); 69 | 70 | mIndexLabels.insert(0, QString::number(8 - i)); 71 | datay1.insert(0, QRandomGenerator::global()->bounded(20) + 5); // 产生随机数，Qt 5.10 以下用qrand() % 20 72 | datay2.insert(0, QRandomGenerator::global()->bounded(1000)); 73 | } 74 | 75 | mIndex = 8; 76 | mPositions = datax; // mPositions == QVector 77 | 78 | graph->setData(datax, datay1); 79 | bar->setData(datax, datay2); 80 | 81 | timeTicker->setTicks(mPositions, mLabels); // 设置刻度线位置和刻度标签 82 | indexTicker->setTicks(mPositions, mIndexLabels); 83 | 84 | customPlot->xAxis->rescale(); 85 | customPlot->xAxis->scaleRange(1.1); // 稍微缩放一下，以显示全部 86 | 87 | connect(&dataTimer, SIGNAL(timeout()), this, SLOT(dynamicDataSlot())); 88 | dataTimer.start(2000); // 2秒刷新一次 89 | } 90 | 91 | void MainWindow::dynamicDataSlot() 92 | { 93 | QCPBars *bar = static_cast(mCustomPlot->plottable(0)); 94 | 95 | // 1. 去除之前的数据 96 | // 移除第一个数据 97 | bar->data()->remove(mPositions.first()); 98 | mCustomPlot->graph(0)->data()->remove(mPositions.first()); 99 | 100 | mPositions.removeFirst(); 101 | mLabels.removeFirst(); 102 | mIndexLabels.removeFirst(); 103 | 104 | // 2. 添加新增数据 105 | // 计算当前时间 106 | double key = QTime::currentTime().msecsSinceStartOfDay() / 1000.0; 107 | QString label = QTime::currentTime().toString("hh:mm:ss"); 108 | 109 | mCustomPlot->graph(0)->addData(key, QRandomGenerator::global()->bounded(20) + 5); 110 | bar->addData(key, QRandomGenerator::global()->bounded(1000)); 111 | 112 | mPositions.push_back(key); 113 | mLabels.push_back(label); 114 | mIndexLabels.push_back(QString::number(++mIndex)); 115 | 116 | // 3. 重新设置轴并刷新图表 117 | QCPAxisTickerText *timeTicker = static_cast(mCustomPlot->xAxis->ticker().data()); 118 | timeTicker->setTicks(mPositions, mLabels); // 重新设置x轴 119 | 120 | QCPAxisTickerText *indexTicker = static_cast(mCustomPlot->xAxis2->ticker().data()); 121 | indexTicker->setTicks(mPositions, mIndexLabels); 122 | 123 | mCustomPlot->xAxis->rescale(); 124 | mCustomPlot->xAxis->scaleRange(1.1); 125 | 126 | mCustomPlot->replot(); 127 | 128 | } 129 | -------------------------------------------------------------------------------- /src/examples/006_dynamic_data_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | class QCustomPlot; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | public: 13 | MainWindow(QWidget* parent = nullptr); 14 | 15 | void setupDynamicData(QCustomPlot *customPlot); 16 | 17 | protected slots: 18 | void dynamicDataSlot(); 19 | 20 | private: 21 | 22 | int mIndex; 23 | QVector mPositions; 24 | QVector mLabels; 25 | QVector mIndexLabels; 26 | 27 | QTimer dataTimer; 28 | QCustomPlot* mCustomPlot; 29 | }; 30 | 31 | #endif // MAINWINDOW_H 32 | -------------------------------------------------------------------------------- /src/examples/007_lemniscate_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/007_lemniscate_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/007_lemniscate_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcustomplot.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | mCustomPlot = new QCustomPlot; 8 | setCentralWidget(mCustomPlot); 9 | 10 | setupLemniscateDemo(mCustomPlot); 11 | } 12 | 13 | void MainWindow::setupLemniscateDemo(QCustomPlot *customPlot) 14 | { 15 | QCPCurve *curve = new QCPCurve(customPlot->xAxis, customPlot->yAxis); 16 | curve->setPen(QPen(Qt::red)); 17 | 18 | // 由于我们是动态图，并且其范围不变化，所以预先设置好了范围 19 | customPlot->xAxis->setRange(-2.5, 12.5); 20 | customPlot->yAxis->setRange(-2.8, 2.8); 21 | 22 | connect(&dataTimer, SIGNAL(timeout()), this, SLOT(dynamicLemniscateSlot())); 23 | dataTimer.start(10); // 10ms刷新一次，实际上QTimer可能达不到这个精度 24 | } 25 | 26 | void MainWindow::dynamicLemniscateSlot() 27 | { 28 | static double t = -M_PI; // 定义起始t 29 | static bool reversed = false; // 为了重复绘制 30 | 31 | QCPCurve *curve = static_cast(mCustomPlot->plottable(0)); 32 | 33 | // 伯努利双纽线(无穷大的符号) 34 | double x = -686*qCos(t) + 735*qCos(2*t) + 490*qSqrt(qPow(qSin(t), 4)) - 265; 35 | x /= (280*qCos(t) - 298); 36 | double y = 5*qSqrt(qPow(qSin(t), 4))*(10/qSin(t) - 7/qTan(t)) + 3*(35*qCos(t) - 33)*qSin(t); 37 | y = 7*y/(140*qCos(t) - 149); 38 | 39 | if (!reversed) { // 还未绘制完成 40 | t += 0.01; 41 | curve->data()->add(QCPCurveData(t, x, y)); 42 | } else { // 绘制已经完成，倒退回去 43 | t -= 0.01; 44 | curve->data()->removeAfter(t); // 这里不能用remove，因为精度原因，remove并不能精确匹配，导致无法删除数据点 45 | } 46 | 47 | mCustomPlot->replot(); 48 | 49 | // 重复绘制 50 | if (t >= M_PI) { 51 | t = M_PI; 52 | reversed = true; 53 | } else if (reversed && t <= -M_PI) { 54 | t = -M_PI; 55 | reversed = false; 56 | } 57 | } 58 | -------------------------------------------------------------------------------- /src/examples/007_lemniscate_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | class QCustomPlot; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | public: 13 | MainWindow(QWidget* parent = nullptr); 14 | 15 | void setupLemniscateDemo(QCustomPlot *customPlot); 16 | 17 | protected slots: 18 | void dynamicLemniscateSlot(); 19 | 20 | private: 21 | QTimer dataTimer; 22 | QCustomPlot* mCustomPlot; 23 | }; 24 | 25 | #endif // MAINWINDOW_H 26 | -------------------------------------------------------------------------------- /src/examples/008_smooth_graph_demo_01/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/008_smooth_graph_demo_01/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/008_smooth_graph_demo_01/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcpsmoothcurve.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | mCustomPlot = new QCustomPlot; 8 | mCustomPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom); 9 | setCentralWidget(mCustomPlot); 10 | setupSmoothCurveDemo(mCustomPlot); 11 | } 12 | 13 | void MainWindow::setupSmoothCurveDemo(QCustomPlot *customPlot) 14 | { 15 | QVector xdata = { 1, 2, 3, 4, 5, 6, 7 }; 16 | QVector ydata = { 820, 932, 901, 934, 1290, 1330, 1320 }; 17 | 18 | QCPSmoothCurve *graph = new QCPSmoothCurve(customPlot->xAxis, customPlot->yAxis); 19 | graph->setPen(QPen(Qt::red, 2)); 20 | graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(Qt::red), QColor(Qt::white), 6)); 21 | graph->setData(xdata, ydata); 22 | graph->setSmooth(true); 23 | 24 | customPlot->xAxis->setRange(0, 8); 25 | customPlot->yAxis->setRange(0, 1500); 26 | } 27 | 28 | -------------------------------------------------------------------------------- /src/examples/008_smooth_graph_demo_01/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | class QCustomPlot; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | public: 13 | MainWindow(QWidget* parent = nullptr); 14 | 15 | void setupSmoothCurveDemo(QCustomPlot *customPlot); 16 | 17 | private: 18 | QCustomPlot* mCustomPlot; 19 | }; 20 | 21 | #endif // MAINWINDOW_H 22 | -------------------------------------------------------------------------------- /src/examples/009_smooth_graph_demo_02/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/009_smooth_graph_demo_02/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/009_smooth_graph_demo_02/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcpsmoothcurve.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | mCustomPlot = new QCustomPlot; 8 | mCustomPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom); 9 | setCentralWidget(mCustomPlot); 10 | setupSmoothCurveDemo(mCustomPlot); 11 | } 12 | 13 | void MainWindow::setupSmoothCurveDemo(QCustomPlot *customPlot) 14 | { 15 | QVector xdata = { 1, 2, 3, 4, 5, 6, 7 }; 16 | QVector ydata = { 820, 932, 901, 934, 1290, 1330, 1320 }; 17 | 18 | QCPSmoothCurve *graph = new QCPSmoothCurve(customPlot->xAxis, customPlot->yAxis); 19 | graph->setPen(QPen(Qt::red, 2)); 20 | graph->setBrush(QColor(208,110,107)); // 设置了填充色即可填充曲线与0点线之间的区域 21 | graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(Qt::red), QColor(Qt::white), 6)); 22 | graph->setData(xdata, ydata); 23 | graph->setSmooth(true); 24 | 25 | double offset = 500; 26 | QVector ydata1 = { 820 - offset, 880 - offset, 901 - offset, 934 - offset, 1290 - offset, 1330 - offset, 1320 - offset }; 27 | QCPSmoothCurve *graph1 = new QCPSmoothCurve(customPlot->xAxis, customPlot->yAxis); 28 | graph1->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QColor(Qt::blue), QColor(Qt::white), 6)); 29 | graph1->setData(xdata, ydata1); 30 | graph1->setSmooth(true); 31 | 32 | graph->setChannelFillGraph(graph1); // 设置与其它曲线填充 33 | 34 | customPlot->xAxis->setRange(0, 8); 35 | customPlot->yAxis->setRange(0, 1500); 36 | } 37 | 38 | -------------------------------------------------------------------------------- /src/examples/009_smooth_graph_demo_02/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | class QCustomPlot; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | public: 13 | MainWindow(QWidget* parent = nullptr); 14 | 15 | void setupSmoothCurveDemo(QCustomPlot *customPlot); 16 | 17 | private: 18 | QCustomPlot* mCustomPlot; 19 | }; 20 | 21 | #endif // MAINWINDOW_H 22 | -------------------------------------------------------------------------------- /src/examples/012_stretch_item_demo/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | get_filename_component(CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} NAME) 2 | project(${CURRENT_SOURCE_DIR}) 3 | 4 | find_package(Qt5Widgets) 5 | 6 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 7 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 8 | 9 | add_executable(${PROJECT_NAME} ${ALL_INCLUDES} ${ALL_SOURCES}) 10 | 11 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets qcustomplot) 12 | -------------------------------------------------------------------------------- /src/examples/012_stretch_item_demo/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include "mainwindow.h" 3 | 4 | int main(int argc, char* argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | 8 | MainWindow w; 9 | w.resize(800, 600); 10 | w.show(); 11 | 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /src/examples/012_stretch_item_demo/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "qcpplot.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) 5 | : QMainWindow(parent) 6 | { 7 | mCustomPlot = new QCPPlot; 8 | setCentralWidget(mCustomPlot); 9 | setupStretchItemDemo(mCustomPlot); 10 | } 11 | 12 | void MainWindow::setupStretchItemDemo(QCustomPlot *plot) 13 | { 14 | auto customPlot = qobject_cast(plot); 15 | customPlot->setInteractions(QCP::iSelectItems | QCP::iRangeZoom | QCP::iRangeDrag); 16 | QCPItemRect *rect = new QCPItemRect(customPlot); 17 | customPlot->sizeHandleManager()->addItem(rect); 18 | rect->setBrush(Qt::red); 19 | rect->setSelectedBrush(Qt::red); 20 | 21 | QCPItemLine *line = new QCPItemLine(customPlot); 22 | customPlot->sizeHandleManager()->addItem(line); 23 | 24 | QCPItemCurve *curve = new QCPItemCurve(customPlot); 25 | customPlot->sizeHandleManager()->addItem(curve); 26 | customPlot->sizeHandleManager()->setLineVisible(curve, true); 27 | 28 | QCPItemText *text = new QCPItemText(customPlot); 29 | text->setText(QString::fromLocal8Bit("试着拖动我！")); 30 | customPlot->sizeHandleManager()->addItem(text); 31 | 32 | QCPItemBracket *bracket = new QCPItemBracket(customPlot); 33 | customPlot->sizeHandleManager()->addItem(bracket); 34 | 35 | QCPItemEllipse *ellipse = new QCPItemEllipse(customPlot); 36 | customPlot->sizeHandleManager()->addItem(ellipse); 37 | customPlot->sizeHandleManager()->setLineVisible(ellipse, true); 38 | 39 | // QCPItemPixmap *pixmap = new QCPItemPixmap(customPlot); 40 | // pixmap->setPixmap(QPixmap(":/sun.png")); 41 | // customPlot->sizeHandleManager()->addItem(pixmap); 42 | 43 | QCPItemStraightLine *straightLine = new QCPItemStraightLine(customPlot); 44 | customPlot->sizeHandleManager()->addItem(straightLine); 45 | 46 | QCPItemTracer *tracer = new QCPItemTracer(customPlot); 47 | customPlot->sizeHandleManager()->addItem(tracer); 48 | } 49 | -------------------------------------------------------------------------------- /src/examples/012_stretch_item_demo/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | class QCustomPlot; 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | public: 13 | MainWindow(QWidget* parent = nullptr); 14 | 15 | void setupStretchItemDemo(QCustomPlot *customPlot); 16 | 17 | private: 18 | QCustomPlot* mCustomPlot; 19 | }; 20 | 21 | #endif // MAINWINDOW_H 22 | -------------------------------------------------------------------------------- /src/examples/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | set(CMAKE_INCLUDE_CURRENT_DIR ON) 2 | set(CMAKE_AUTOMOC ON) 3 | set(CMAKE_CXX_STANDARD 11) 4 | set(CMAKE_CXX_STANDARD_REQUIRED ON) 5 | add_definitions(-DQCUSTOMPLOT_USE_LIBRARY) 6 | 7 | include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../qcustomplot) 8 | link_directories(${ROOT_PATH}/bin) 9 | 10 | add_subdirectory(001_start) 11 | add_subdirectory(003_bar_chart_demo) 12 | add_subdirectory(004_layout_demo) 13 | add_subdirectory(005_axisrect_demo) 14 | add_subdirectory(006_dynamic_data_demo) 15 | add_subdirectory(007_lemniscate_demo) 16 | add_subdirectory(008_smooth_graph_demo_01) 17 | add_subdirectory(009_smooth_graph_demo_02) 18 | add_subdirectory(012_stretch_item_demo) 19 | 20 | -------------------------------------------------------------------------------- /src/qcustomplot/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | project(qcustomplot) 2 | 3 | set(CMAKE_INCLUDE_CURRENT_DIR ON) 4 | set(CMAKE_AUTOMOC ON) 5 | set(CMAKE_CXX_STANDARD 11) 6 | set(CMAKE_CXX_STANDARD_REQUIRED ON) 7 | add_definitions(-DQCUSTOMPLOT_COMPILE_LIBRARY) 8 | 9 | find_package(Qt5Widgets) 10 | find_package(Qt5PrintSupport) 11 | 12 | file(GLOB ALL_SOURCES "*.cpp" "*.c") 13 | file(GLOB ALL_INCLUDES "*.hpp" "*.h") 14 | 15 | add_library(${PROJECT_NAME} SHARED ${ALL_INCLUDES} ${ALL_SOURCES}) 16 | 17 | target_link_libraries(${PROJECT_NAME} Qt5::Widgets Qt5::PrintSupport) 18 | 19 | install(TARGETS ${PROJECT_NAME} 20 | LIBRARY DESTINATION ${ROOT_PATH}/bin) 21 | -------------------------------------------------------------------------------- /src/qcustomplot/GPL.txt: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpplot.cpp: -------------------------------------------------------------------------------- 1 | #include "qcpplot.h" 2 | 3 | QCPPlot::QCPPlot(QWidget *parent) 4 | : QCustomPlot(parent) 5 | , mSizeHandleManager(new QCPSizeHandleManager(this)) 6 | { 7 | 8 | } 9 | 10 | void QCPPlot::mousePressEvent(QMouseEvent *event) 11 | { 12 | mMousePressPos = event->pos(); 13 | mMouseHasMoved = false; 14 | mLastMousePos = mMousePressPos; 15 | 16 | if (event->button() == Qt::LeftButton) { 17 | processPointSelection(event); 18 | if (selectedItems().count()) { 19 | emit mousePress(event); 20 | replot(rpQueuedReplot); 21 | return; 22 | } 23 | } 24 | 25 | QCustomPlot::mousePressEvent(event); 26 | } 27 | 28 | void QCPPlot::mouseMoveEvent(QMouseEvent *event) 29 | { 30 | QCustomPlot::mouseMoveEvent(event); 31 | 32 | if (mMouseHasMoved && (event->buttons() & Qt::LeftButton)) { 33 | auto items = selectedItems(); 34 | for (auto item : items) { 35 | if (auto sizeHandle = qobject_cast(item)) 36 | mSizeHandleManager->onItemResize(sizeHandle, event->pos() - mLastMousePos); 37 | else 38 | mSizeHandleManager->onItemMove(item, event->pos() - mLastMousePos); 39 | } 40 | 41 | mLastMousePos = event->pos(); 42 | if (items.count()) 43 | replot(rpQueuedReplot); 44 | } 45 | } 46 | 47 | void QCPPlot::mouseReleaseEvent(QMouseEvent *event) 48 | { 49 | QCustomPlot::mouseReleaseEvent(event); 50 | if (event->button() == Qt::LeftButton) { 51 | if (auto item = itemAt(event->pos(), true)) { 52 | item->setSelected(false); 53 | replot(rpQueuedReplot); 54 | } 55 | } 56 | } 57 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpplot.h: -------------------------------------------------------------------------------- 1 | #ifndef QCPPLOT_H 2 | #define QCPPLOT_H 3 | 4 | #include "qcpsizehandlemanager.h" 5 | 6 | class QCP_LIB_DECL QCPPlot : public QCustomPlot 7 | { 8 | Q_OBJECT 9 | public: 10 | explicit QCPPlot(QWidget* parent = nullptr); 11 | 12 | QCPSizeHandleManager* sizeHandleManager() const { return mSizeHandleManager; } 13 | 14 | protected: 15 | void mousePressEvent(QMouseEvent *event) override; 16 | void mouseMoveEvent(QMouseEvent *event) override; 17 | void mouseReleaseEvent(QMouseEvent *event) override; 18 | 19 | protected: 20 | QCPSizeHandleManager* mSizeHandleManager; 21 | QPointF mLastMousePos; 22 | }; 23 | 24 | #endif // QCPPLOT_H 25 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsizehandle.cpp: -------------------------------------------------------------------------------- 1 | #include "qcpsizehandle.h" 2 | 3 | QCPSizeHandle::QCPSizeHandle(QCustomPlot *parentPlot, QCPAbstractItem *attachItem) 4 | : QCPAbstractItem(parentPlot) 5 | , position(createPosition(QLatin1String("position"))) 6 | , mHovered(false) 7 | , mAttachItem(attachItem) 8 | { 9 | setBrush(QColor("#436EEE")); 10 | setHoveredBrush(QColor("#1C86EE")); 11 | setSelectedBrush(QColor("#3A5FCD")); 12 | setSize(8); 13 | setLayer(QLatin1String("overlay")); 14 | } 15 | 16 | QCPSizeHandle::~QCPSizeHandle() 17 | { 18 | } 19 | 20 | void QCPSizeHandle::setBrush(const QBrush &brush) 21 | { 22 | mBrush = brush; 23 | } 24 | 25 | void QCPSizeHandle::setSelectedBrush(const QBrush &brush) 26 | { 27 | mSelectedBrush = brush; 28 | } 29 | 30 | void QCPSizeHandle::setHoveredBrush(const QBrush &brush) 31 | { 32 | mHoveredBrush = brush; 33 | } 34 | 35 | void QCPSizeHandle::setSize(double size) 36 | { 37 | mSize = size; 38 | } 39 | 40 | double QCPSizeHandle::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const 41 | { 42 | Q_UNUSED(details) 43 | if (onlySelectable && !mSelectable) 44 | return -1; 45 | 46 | QPointF itemPos = position->pixelPosition(); 47 | QRectF rect = QRectF(itemPos.x() - mSize * 0.5, itemPos.y() - mSize * 0.5, mSize, mSize); 48 | bool filledRect = mBrush.style() != Qt::NoBrush && mBrush.color().alpha() != 0; 49 | return rectDistance(rect, pos, filledRect); 50 | } 51 | 52 | void QCPSizeHandle::draw(QCPPainter *painter) 53 | { 54 | QRectF rect(0, 0, mSize, mSize); 55 | 56 | rect.moveTopLeft(position->pixelPosition() - QPointF(mSize * 0.5, mSize * 0.5)); 57 | 58 | if (rect.intersects(clipRect())) { 59 | painter->setPen(Qt::NoPen); 60 | painter->setBrush(mainBrush()); 61 | painter->drawRect(rect); 62 | } 63 | } 64 | 65 | //void QCPSizeHandle::hoverEnterEvent(QHoverEvent *event) 66 | //{ 67 | // Q_UNUSED(event) 68 | // mHovered = true; 69 | // layer()->replot(); 70 | //} 71 | 72 | //void QCPSizeHandle::hoverLeaveEvent(QHoverEvent *event) 73 | //{ 74 | // Q_UNUSED(event) 75 | // mHovered = true; 76 | // layer()->replot(); 77 | //} 78 | 79 | QBrush QCPSizeHandle::mainBrush() const 80 | { 81 | return selected() ? mSelectedBrush : (mHovered ? mHoveredBrush : mBrush); 82 | } 83 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsizehandle.h: -------------------------------------------------------------------------------- 1 | #ifndef QCPSIZEHANDLE_H 2 | #define QCPSIZEHANDLE_H 3 | 4 | #include "qcustomplot.h" 5 | 6 | class QCP_LIB_DECL QCPSizeHandle : public QCPAbstractItem 7 | { 8 | Q_OBJECT 9 | public: 10 | explicit QCPSizeHandle(QCustomPlot *parentPlot, QCPAbstractItem* attachItem); 11 | ~QCPSizeHandle(); 12 | 13 | void setBrush(const QBrush &brush); 14 | void setSelectedBrush(const QBrush &brush); 15 | void setHoveredBrush(const QBrush &brush); 16 | void setSize(double size); 17 | 18 | QCPAbstractItem* attachItem() const { return mAttachItem; } 19 | 20 | QCPItemPosition * const position; 21 | 22 | public: 23 | virtual double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const Q_DECL_OVERRIDE; 24 | 25 | protected: 26 | bool mHovered; 27 | double mSize; 28 | QBrush mBrush; 29 | QBrush mSelectedBrush; 30 | QBrush mHoveredBrush; 31 | QCPAbstractItem* mAttachItem; 32 | 33 | virtual void draw(QCPPainter *painter) Q_DECL_OVERRIDE; 34 | // virtual void hoverEnterEvent(QHoverEvent *event) Q_DECL_OVERRIDE; 35 | // virtual void hoverLeaveEvent(QHoverEvent *event) Q_DECL_OVERRIDE; 36 | 37 | QBrush mainBrush() const; 38 | }; 39 | 40 | #endif // QCPSIZEHANDLE_H 41 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsizehandlemanager.cpp: -------------------------------------------------------------------------------- 1 | #include "qcpsizehandlemanager.h" 2 | 3 | QCPSizeHandleManager::QCPSizeHandleManager(QCustomPlot *parent) 4 | : QCPAbstractItem(parent) 5 | { 6 | setLayer("overlay"); 7 | } 8 | 9 | bool QCPSizeHandleManager::addItem(QCPAbstractItem *item) 10 | { 11 | if (!item || item->positions().isEmpty() || qobject_cast(item)) 12 | return false; 13 | 14 | if (mItems.contains(item)) 15 | return true; 16 | 17 | QList handles; 18 | for (auto position : item->positions()) { 19 | auto *handle = new QCPSizeHandle(mParentPlot, item); 20 | handle->position->setParentAnchor(position); 21 | handles.append(handle); 22 | } 23 | 24 | if (handles.count() == 1) 25 | handles.at(0)->setVisible(false); 26 | 27 | auto itemData = QSharedPointer::create(); 28 | itemData->resizable = handles.count() > 1; 29 | itemData->handles = handles; 30 | mItems.insert(item, itemData); 31 | return true; 32 | } 33 | 34 | void QCPSizeHandleManager::removeItem(QCPAbstractItem *item) 35 | { 36 | mItems.remove(item); 37 | } 38 | 39 | void QCPSizeHandleManager::setLineVisible(QCPAbstractItem *item, bool visible) 40 | { 41 | if (auto itemData = mItems.value(item)) 42 | itemData->lineVisible = visible; 43 | } 44 | 45 | void QCPSizeHandleManager::setLinePen(QCPAbstractItem *item, const QPen &pen) 46 | { 47 | if (auto itemData = mItems.value(item)) 48 | itemData->linePen = pen; 49 | } 50 | 51 | void QCPSizeHandleManager::setItemMovable(QCPAbstractItem *item, bool movable) 52 | { 53 | if (auto itemData = mItems.value(item)) 54 | itemData->movable = movable; 55 | } 56 | 57 | void QCPSizeHandleManager::setItemResizable(QCPAbstractItem *item, bool resizable) 58 | { 59 | if (auto itemData = mItems.value(item)) 60 | itemData->resizable = resizable && itemData->handles.count() > 1; 61 | } 62 | 63 | double QCPSizeHandleManager::selectTest(const QPointF &, bool , QVariant *) const 64 | { 65 | return -1; 66 | } 67 | 68 | void QCPSizeHandleManager::onItemMove(QCPAbstractItem *item, const QPointF &delta) 69 | { 70 | if (!item || !mItems.contains(item)) 71 | return; 72 | 73 | auto itemData = mItems.value(item); 74 | if (!itemData->movable) 75 | return; 76 | 77 | for (auto position : item->positions()) 78 | position->setPixelPosition(position->pixelPosition() + delta); 79 | } 80 | 81 | void QCPSizeHandleManager::onItemResize(QCPSizeHandle *sizeHandle, const QPointF &delta) 82 | { 83 | if (!sizeHandle) 84 | return; 85 | 86 | auto itemData = mItems.value(sizeHandle->attachItem()); 87 | if (!itemData || !itemData->resizable) 88 | return; 89 | 90 | if (auto parentPosition = static_cast(sizeHandle->position->parentAnchor())) 91 | { 92 | parentPosition->setPixelPosition(parentPosition->pixelPosition() + delta); 93 | } 94 | } 95 | 96 | void QCPSizeHandleManager::draw(QCPPainter *painter) 97 | { 98 | QMapIterator, QSharedPointer> i(mItems); 99 | QList destoryedItems; 100 | 101 | while (i.hasNext()) { 102 | i.next(); 103 | 104 | if (!i.key()) { 105 | destoryedItems.append(i.key()); 106 | continue; 107 | } 108 | 109 | auto itemData = i.value(); 110 | if (!itemData->lineVisible || itemData->handles.count() < 2) 111 | continue; 112 | 113 | painter->setPen(itemData->linePen); 114 | 115 | QVector lines; 116 | 117 | QCPItemAnchor *topLeft = nullptr; 118 | QCPItemAnchor *bottomRight = nullptr; 119 | 120 | for (auto handle : itemData->handles) { 121 | if (handle->position->parentAnchor()->name() == QLatin1String("topLeft")) 122 | topLeft = handle->position->parentAnchor(); 123 | if (handle->position->parentAnchor()->name() == QLatin1String("bottomRight")) 124 | bottomRight = handle->position->parentAnchor(); 125 | lines.push_back(handle->position->pixelPosition()); 126 | } 127 | 128 | if (topLeft && bottomRight) { 129 | lines.clear(); 130 | 131 | lines.push_back(topLeft->pixelPosition()); 132 | lines.push_back(QPointF(bottomRight->pixelPosition().x(), topLeft->pixelPosition().y())); 133 | lines.push_back(bottomRight->pixelPosition()); 134 | lines.push_back(QPointF(topLeft->pixelPosition().x(), bottomRight->pixelPosition().y())); 135 | lines.push_back(topLeft->pixelPosition()); 136 | painter->drawPolyline(lines); 137 | } else 138 | painter->drawLines(lines); 139 | } 140 | } 141 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsizehandlemanager.h: -------------------------------------------------------------------------------- 1 | #ifndef QCPSIZEHANDLEMANAGER_H 2 | #define QCPSIZEHANDLEMANAGER_H 3 | 4 | #include "qcpsizehandle.h" 5 | 6 | class QCPSizeHandle; 7 | class QCP_LIB_DECL QCPSizeHandleManager : public QCPAbstractItem 8 | { 9 | Q_OBJECT 10 | public: 11 | explicit QCPSizeHandleManager(QCustomPlot *parent); 12 | 13 | bool addItem(QCPAbstractItem* item); 14 | void removeItem(QCPAbstractItem* item); 15 | 16 | void setLineVisible(QCPAbstractItem* item, bool visible); 17 | void setLinePen(QCPAbstractItem* item, const QPen& pen); 18 | void setItemMovable(QCPAbstractItem* item, bool movable); 19 | void setItemResizable(QCPAbstractItem* item, bool resizable); 20 | 21 | double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override; 22 | 23 | public slots: 24 | void onItemMove(QCPAbstractItem* item, const QPointF &delta); 25 | void onItemResize(QCPSizeHandle* sizeHandle, const QPointF &delta); 26 | 27 | protected: 28 | void draw(QCPPainter *painter) override; 29 | 30 | protected: 31 | struct ItemData { 32 | bool lineVisible = false; 33 | bool movable = true; 34 | bool resizable = true; 35 | QPen linePen = QPen(Qt::blue, 1, Qt::DashLine); 36 | QList handles; 37 | }; 38 | 39 | QMap, QSharedPointer> mItems; 40 | }; 41 | 42 | #endif // QCPSIZEHANDLEMANAGER_H 43 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsmoothcurve.cpp: -------------------------------------------------------------------------------- 1 | #include "qcpsmoothcurve.h" 2 | 3 | class SmoothCurveGenerator 4 | { 5 | protected: 6 | static QPainterPath generateSmoothCurveImp(const QVector &points) { 7 | QPainterPath path; 8 | int len = points.size(); 9 | 10 | if (len < 2) { 11 | return path; 12 | } 13 | 14 | QVector firstControlPoints; 15 | QVector secondControlPoints; 16 | calculateControlPoints(points, &firstControlPoints, &secondControlPoints); 17 | 18 | path.moveTo(points[0].x(), points[0].y()); 19 | 20 | // Using bezier curve to generate a smooth curve. 21 | for (int i = 0; i < len - 1; ++i) { 22 | path.cubicTo(firstControlPoints[i], secondControlPoints[i], points[i+1]); 23 | } 24 | 25 | return path; 26 | } 27 | public: 28 | static QPainterPath generateSmoothCurve(const QVector &points) { 29 | QPainterPath result; 30 | QVector lineData(QVector(points.constBegin(), points.constEnd())); 31 | result.addPath(generateSmoothCurveImp(lineData)); 32 | return result; 33 | } 34 | 35 | static QPainterPath generateSmoothCurve(const QPainterPath &basePath, const QVector &points) { 36 | if (points.isEmpty()) return basePath; 37 | 38 | QPainterPath path = basePath; 39 | int len = points.size(); 40 | if (len == 1) { 41 | path.lineTo(points.at(0)); 42 | return path; 43 | } 44 | 45 | QVector firstControlPoints; 46 | QVector secondControlPoints; 47 | calculateControlPoints(points, &firstControlPoints, &secondControlPoints); 48 | 49 | path.lineTo(points.at(0)); 50 | for (int i = 0; i < len - 1; ++i) 51 | path.cubicTo(firstControlPoints[i], secondControlPoints[i], points[i+1]); 52 | 53 | return path; 54 | } 55 | 56 | static void calculateFirstControlPoints(double *&result, const double *rhs, int n) { 57 | result = new double[n]; 58 | double *tmp = new double[n]; 59 | double b = 2.0; 60 | result[0] = rhs[0] / b; 61 | 62 | // Decomposition and forward substitution. 63 | for (int i = 1; i < n; i++) { 64 | tmp[i] = 1 / b; 65 | b = (i < n - 1 ? 4.0 : 3.5) - tmp[i]; 66 | result[i] = (rhs[i] - result[i - 1]) / b; 67 | } 68 | 69 | for (int i = 1; i < n; i++) { 70 | result[n - i - 1] -= tmp[n - i] * result[n - i]; // Backsubstitution. 71 | } 72 | 73 | delete[] tmp; 74 | } 75 | 76 | static void calculateControlPoints(const QVector &knots, 77 | QVector *firstControlPoints, 78 | QVector *secondControlPoints) { 79 | int n = knots.size() - 1; 80 | 81 | firstControlPoints->reserve(n); 82 | secondControlPoints->reserve(n); 83 | 84 | for (int i = 0; i < n; ++i) { 85 | firstControlPoints->append(QPointF()); 86 | secondControlPoints->append(QPointF()); 87 | } 88 | 89 | if (n == 1) { 90 | // Special case: Bezier curve should be a straight line. 91 | // P1 = (2P0 + P3) / 3 92 | (*firstControlPoints)[0].rx() = (2 * knots[0].x() + knots[1].x()) / 3; 93 | (*firstControlPoints)[0].ry() = (2 * knots[0].y() + knots[1].y()) / 3; 94 | 95 | // P2 = 2P1 – P0 96 | (*secondControlPoints)[0].rx() = 2 * (*firstControlPoints)[0].x() - knots[0].x(); 97 | (*secondControlPoints)[0].ry() = 2 * (*firstControlPoints)[0].y() - knots[0].y(); 98 | 99 | return; 100 | } 101 | 102 | // Calculate first Bezier control points 103 | double *xs = nullptr; 104 | double *ys = nullptr; 105 | double *rhsx = new double[n]; // Right hand side vector 106 | double *rhsy = new double[n]; // Right hand side vector 107 | 108 | // Set right hand side values 109 | for (int i = 1; i < n - 1; ++i) { 110 | rhsx[i] = 4 * knots[i].x() + 2 * knots[i + 1].x(); 111 | rhsy[i] = 4 * knots[i].y() + 2 * knots[i + 1].y(); 112 | } 113 | rhsx[0] = knots[0].x() + 2 * knots[1].x(); 114 | rhsx[n - 1] = (8 * knots[n - 1].x() + knots[n].x()) / 2.0; 115 | rhsy[0] = knots[0].y() + 2 * knots[1].y(); 116 | rhsy[n - 1] = (8 * knots[n - 1].y() + knots[n].y()) / 2.0; 117 | 118 | // Calculate first control points coordinates 119 | calculateFirstControlPoints(xs, rhsx, n); 120 | calculateFirstControlPoints(ys, rhsy, n); 121 | 122 | // Fill output control points. 123 | for (int i = 0; i < n; ++i) { 124 | (*firstControlPoints)[i].rx() = xs[i]; 125 | (*firstControlPoints)[i].ry() = ys[i]; 126 | 127 | if (i < n - 1) { 128 | (*secondControlPoints)[i].rx() = 2 * knots[i + 1].x() - xs[i + 1]; 129 | (*secondControlPoints)[i].ry() = 2 * knots[i + 1].y() - ys[i + 1]; 130 | } else { 131 | (*secondControlPoints)[i].rx() = (knots[n].x() + xs[n - 1]) / 2; 132 | (*secondControlPoints)[i].ry() = (knots[n].y() + ys[n - 1]) / 2; 133 | } 134 | } 135 | 136 | delete xs; 137 | delete ys; 138 | delete[] rhsx; 139 | delete[] rhsy; 140 | } 141 | }; 142 | 143 | 144 | QCPSmoothCurve::QCPSmoothCurve(QCPAxis *keyAxis, QCPAxis *valueAxis) 145 | : QCPGraph(keyAxis, valueAxis) 146 | , mSmooth(true) 147 | { 148 | 149 | } 150 | 151 | void QCPSmoothCurve::draw(QCPPainter *painter) 152 | { 153 | if (!mKeyAxis || !mValueAxis) { qDebug() << Q_FUNC_INFO << "invalid key or value axis"; return; } 154 | if (mKeyAxis.data()->range().size() <= 0 || mDataContainer->isEmpty()) return; 155 | if (mLineStyle == lsNone && mScatterStyle.isNone()) return; 156 | 157 | if (mSmooth && mLineStyle == lsLine) { 158 | QVector data(mDataContainer->begin(), mDataContainer->end()); 159 | mLines = dataToLines(data); 160 | mSegments = getNonNanSegments(&mLines, mKeyAxis->orientation()); 161 | mSmoothPaths = QVector(); 162 | mSmoothPaths.reserve(mSegments.count()); 163 | for (int i = 0; i < mSegments.count(); ++i) { 164 | const auto& segment = mSegments.at(i); 165 | QVector points(mLines.constBegin() + segment.begin(), mLines.constBegin() + segment.end()); 166 | mSmoothPaths.append(SmoothCurveGenerator::generateSmoothCurve(points)); 167 | } 168 | qDebug() << mSegments.count() << mSmoothPaths.count() << mLines.count(); 169 | } 170 | 171 | QCPGraph::draw(painter); 172 | 173 | mSegments = QVector(); 174 | mSmoothPaths = QVector(); 175 | mLines = QVector(); 176 | } 177 | 178 | void QCPSmoothCurve::drawLinePlot(QCPPainter *painter, const QVector &lines) const 179 | { 180 | if (painter->pen().style() != Qt::NoPen && painter->pen().color().alpha() != 0) { 181 | applyDefaultAntialiasingHint(painter); 182 | if (mSmooth && mLineStyle == lsLine) { 183 | QPainterPath clipPath = painter->clipPath(); 184 | QPainterPath clipRect = getLinesClipPath(lines); 185 | 186 | painter->setClipPath(clipPath.intersected(clipRect)); 187 | for (int i = 0; i < mSmoothPaths.count(); ++i) { 188 | if (mSmoothPaths.at(i).intersects(clipRect)) 189 | painter->drawPath(mSmoothPaths.at(i)); 190 | } 191 | 192 | painter->setClipPath(clipPath); 193 | } 194 | else 195 | drawPolyline(painter, lines); 196 | } 197 | } 198 | 199 | void QCPSmoothCurve::drawFill(QCPPainter *painter, QVector *lines) const 200 | { 201 | if (mLineStyle == lsImpulse) return; // fill doesn't make sense for impulse plot 202 | if (painter->brush().style() == Qt::NoBrush || painter->brush().color().alpha() == 0) return; 203 | 204 | applyFillAntialiasingHint(painter); 205 | QVector segments = getNonNanSegments(lines, keyAxis()->orientation()); 206 | if (!mChannelFillGraph) // 与0点线围成的区域 207 | { 208 | // draw base fill under graph, fill goes all the way to the zero-value-line: 209 | for (int i=0; iclipPath(); 212 | QPainterPath clipRect; 213 | auto path = getSmoothFillPath(lines, segments.at(i), &clipRect); 214 | painter->setClipPath(clipPath.intersected(clipRect)); 215 | painter->drawPath(path); // 平滑曲线 216 | painter->setClipPath(clipPath); 217 | } 218 | else 219 | painter->drawPolygon(getFillPolygon(lines, segments.at(i))); // 折线 220 | } else // 与其它QCPGraph围成的区域 221 | { 222 | // draw fill between this graph and mChannelFillGraph: 223 | auto channelFillGraph = qobject_cast(mChannelFillGraph.data()); 224 | if (!channelFillGraph) { 225 | qDebug() << "ChannelFillGraph must be QCPSmoothCurve"; 226 | return; 227 | } 228 | QVector otherLines; 229 | channelFillGraph->getLines(&otherLines, QCPDataRange(0, channelFillGraph->dataCount())); 230 | if (!otherLines.isEmpty()) 231 | { 232 | QVector otherSegments = getNonNanSegments(&otherLines, channelFillGraph->keyAxis()->orientation()); 233 | QVector > segmentPairs = getOverlappingSegments(segments, lines, otherSegments, &otherLines); 234 | for (int i=0; imLineStyle == lsLine) && (mSmooth || channelFillGraph->mSmooth)) 236 | painter->drawPath(getSmoothChannelFillPath(lines, segmentPairs.at(i).first, &otherLines, segmentPairs.at(i).second)); // 平滑曲线 237 | else 238 | painter->drawPolygon(getChannelFillPolygon(lines, segmentPairs.at(i).first, &otherLines, segmentPairs.at(i).second)); // 折线 239 | } 240 | } 241 | } 242 | } 243 | 244 | QPainterPath QCPSmoothCurve::getSmoothFillPath(const QVector *lineData, QCPDataRange segment, QPainterPath *clipPath) const 245 | { 246 | // 只有一个点构不成填充区域 247 | if (segment.size() < 2) 248 | return QPainterPath(); 249 | 250 | *clipPath = getLinesClipPath(getFillPolygon(lineData, segment)); 251 | 252 | QPainterPath result; 253 | for (int i = 0; i < mSmoothPaths.count(); ++i) { 254 | QCPDataRange subSegment = mSegments.at(i); 255 | if (subSegment.size() < 2) 256 | continue; 257 | 258 | QPointF start = getFillBasePoint(mLines.at(subSegment.begin())); 259 | QPointF end = getFillBasePoint(mLines.at(subSegment.end() - 1)); 260 | QPainterPath path = mSmoothPaths.at(i); 261 | path.lineTo(end); 262 | path.lineTo(start); 263 | path.lineTo(mLines.at(subSegment.begin())); 264 | result.addPath(path); 265 | 266 | } 267 | return result; 268 | } 269 | 270 | QPainterPath QCPSmoothCurve::getSmoothChannelFillPath(const QVector *thisData, QCPDataRange thisSegment, 271 | const QVector *otherData, QCPDataRange otherSegment) const 272 | { 273 | QPainterPath result; 274 | auto channelFillGraph = qobject_cast(mChannelFillGraph.data()); 275 | if (!channelFillGraph) { 276 | qDebug() << "ChannelFillGraph must be QCPSmoothCurve"; 277 | return result; 278 | } 279 | 280 | QCPAxis *keyAxis = mKeyAxis.data(); 281 | QCPAxis *valueAxis = mValueAxis.data(); 282 | if (!keyAxis || !valueAxis) { qDebug() << Q_FUNC_INFO << "invalid key or value axis"; return result; } 283 | if (!channelFillGraph->mKeyAxis) { qDebug() << Q_FUNC_INFO << "channel fill target key axis invalid"; return result; } 284 | 285 | if (channelFillGraph->mKeyAxis.data()->orientation() != keyAxis->orientation()) 286 | return result; // don't have same axis orientation, can't fill that (Note: if keyAxis fits, valueAxis will fit too, because it's always orthogonal to keyAxis) 287 | 288 | if (thisData->isEmpty()) return result; 289 | QVector thisSegmentData(thisSegment.size()); 290 | QVector otherSegmentData(otherSegment.size()); 291 | std::copy(thisData->constBegin()+thisSegment.begin(), thisData->constBegin()+thisSegment.end(), thisSegmentData.begin()); 292 | std::copy(otherData->constBegin()+otherSegment.begin(), otherData->constBegin()+otherSegment.end(), otherSegmentData.begin()); 293 | // pointers to be able to swap them, depending which data range needs cropping: 294 | QVector *staticData = &thisSegmentData; 295 | QVector *croppedData = &otherSegmentData; 296 | 297 | //! [1] 以下为添加的内容 298 | if (mSmooth) 299 | result = SmoothCurveGenerator::generateSmoothCurve(thisSegmentData); 300 | else 301 | result.addPolygon(thisSegmentData); 302 | if (channelFillGraph->mSmooth && channelFillGraph->mLineStyle == lsLine) { // mChannelFillGraph也是平滑曲线 303 | QVector otherSegmentDataReverse(otherSegmentData.size()); 304 | for (int i = otherSegmentData.size() - 1; i >= 0; --i) 305 | otherSegmentDataReverse[otherSegmentData.size() - i - 1] = otherSegmentData.at(i); 306 | result = SmoothCurveGenerator::generateSmoothCurve(result, otherSegmentDataReverse); 307 | } else { // mChannelFillGraph 是折线 308 | // mLineStyle != lsLine 会导致闪烁，目前还不知道什么原因造成 309 | for (int i = otherSegmentData.size() - 1; i >= 0; --i) 310 | result.lineTo(otherSegmentData.at(i)); 311 | } 312 | //! [1] 313 | 314 | // crop both vectors to ranges in which the keys overlap (which coord is key, depends on axisType): 315 | if (keyAxis->orientation() == Qt::Horizontal) 316 | { 317 | // x is key 318 | // crop lower bound: 319 | if (staticData->first().x() < croppedData->first().x()) // other one must be cropped 320 | qSwap(staticData, croppedData); 321 | const int lowBound = findIndexBelowX(croppedData, staticData->first().x()); 322 | if (lowBound == -1) return result; // key ranges have no overlap 323 | //! [2] 以下为添加的内容 324 | QPointF firstPoint = QPointF(croppedData->at(0).x(), valueAxis->coordToPixel(valueAxis->range().upper)); // 注意这里只裁剪到了轴矩形的可见区域 325 | //! [2] 326 | croppedData->remove(0, lowBound); 327 | // set lowest point of cropped data to fit exactly key position of first static data point via linear interpolation: 328 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 329 | double slope; 330 | if (!qFuzzyCompare(croppedData->at(1).x(), croppedData->at(0).x())) 331 | slope = (croppedData->at(1).y()-croppedData->at(0).y())/(croppedData->at(1).x()-croppedData->at(0).x()); 332 | else 333 | slope = 0; 334 | (*croppedData)[0].setY(croppedData->at(0).y()+slope*(staticData->first().x()-croppedData->at(0).x())); 335 | (*croppedData)[0].setX(staticData->first().x()); 336 | 337 | //! [3] 以下为添加的内容 338 | QPointF lastPoint = QPointF(staticData->first().x(), valueAxis->coordToPixel(valueAxis->range().lower)); // 注意这里只裁剪到了轴矩形的可见区域 339 | QPainterPath droppedPath; 340 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 341 | result -= droppedPath; // 裁掉多余区域 342 | //! [3] 343 | 344 | // crop upper bound: 345 | if (staticData->last().x() > croppedData->last().x()) // other one must be cropped 346 | qSwap(staticData, croppedData); 347 | int highBound = findIndexAboveX(croppedData, staticData->last().x()); 348 | if (highBound == -1) return result; // key ranges have no overlap 349 | //! [4] 以下为添加的内容 350 | firstPoint = QPointF(croppedData->last().x(), valueAxis->coordToPixel(valueAxis->range().lower)); // 注意这里只裁剪到了轴矩形的可见区域 351 | //! [4] 352 | croppedData->remove(highBound+1, croppedData->size()-(highBound+1)); 353 | // set highest point of cropped data to fit exactly key position of last static data point via linear interpolation: 354 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 355 | const int li = croppedData->size()-1; // last index 356 | if (!qFuzzyCompare(croppedData->at(li).x(), croppedData->at(li-1).x())) 357 | slope = (croppedData->at(li).y()-croppedData->at(li-1).y())/(croppedData->at(li).x()-croppedData->at(li-1).x()); 358 | else 359 | slope = 0; 360 | (*croppedData)[li].setY(croppedData->at(li-1).y()+slope*(staticData->last().x()-croppedData->at(li-1).x())); 361 | (*croppedData)[li].setX(staticData->last().x()); 362 | 363 | //! [5] 以下为添加的内容 364 | lastPoint = QPointF(staticData->last().x(), valueAxis->coordToPixel(valueAxis->range().upper)); 365 | droppedPath = QPainterPath(); 366 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 367 | result -= droppedPath; // 裁掉多余区域 368 | //! [5] 369 | } else // mKeyAxis->orientation() == Qt::Vertical 370 | { 371 | // y is key 372 | // crop lower bound: 373 | if (staticData->first().y() < croppedData->first().y()) // other one must be cropped 374 | qSwap(staticData, croppedData); 375 | int lowBound = findIndexBelowY(croppedData, staticData->first().y()); 376 | if (lowBound == -1) return result; // key ranges have no overlap 377 | //! [6] 以下为添加的内容 378 | QPointF firstPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().upper), croppedData->first().y()); 379 | //! [6] 380 | croppedData->remove(0, lowBound); 381 | // set lowest point of cropped data to fit exactly key position of first static data point via linear interpolation: 382 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 383 | double slope; 384 | if (!qFuzzyCompare(croppedData->at(1).y(), croppedData->at(0).y())) // avoid division by zero in step plots 385 | slope = (croppedData->at(1).x()-croppedData->at(0).x())/(croppedData->at(1).y()-croppedData->at(0).y()); 386 | else 387 | slope = 0; 388 | (*croppedData)[0].setX(croppedData->at(0).x()+slope*(staticData->first().y()-croppedData->at(0).y())); 389 | (*croppedData)[0].setY(staticData->first().y()); 390 | 391 | //! [7] 以下为添加的内容 392 | QPointF lastPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().lower), staticData->first().y()); 393 | QPainterPath droppedPath; 394 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 395 | result -= droppedPath; 396 | //! [7] 397 | 398 | // crop upper bound: 399 | if (staticData->last().y() > croppedData->last().y()) // other one must be cropped 400 | qSwap(staticData, croppedData); 401 | int highBound = findIndexAboveY(croppedData, staticData->last().y()); 402 | if (highBound == -1) return result; // key ranges have no overlap 403 | //! [8] 以下为添加的内容 404 | firstPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().lower), croppedData->last().y()); 405 | //! [8] 406 | croppedData->remove(highBound+1, croppedData->size()-(highBound+1)); 407 | // set highest point of cropped data to fit exactly key position of last static data point via linear interpolation: 408 | if (croppedData->size() < 2) return result; // need at least two points for interpolation 409 | int li = croppedData->size()-1; // last index 410 | if (!qFuzzyCompare(croppedData->at(li).y(), croppedData->at(li-1).y())) // avoid division by zero in step plots 411 | slope = (croppedData->at(li).x()-croppedData->at(li-1).x())/(croppedData->at(li).y()-croppedData->at(li-1).y()); 412 | else 413 | slope = 0; 414 | (*croppedData)[li].setX(croppedData->at(li-1).x()+slope*(staticData->last().y()-croppedData->at(li-1).y())); 415 | (*croppedData)[li].setY(staticData->last().y()); 416 | 417 | //! [9] 以下为添加的内容 418 | lastPoint = QPointF(valueAxis->coordToPixel(valueAxis->range().upper), staticData->last().y()); 419 | droppedPath = QPainterPath(); 420 | droppedPath.addRect(QRectF(firstPoint, lastPoint).normalized()); 421 | result -= droppedPath; 422 | //! [9] 423 | } 424 | return result; 425 | } 426 | 427 | QPainterPath QCPSmoothCurve::getLinesClipPath(const QPolygonF &polygon) const 428 | { 429 | QPainterPath result; 430 | QRectF br = polygon.boundingRect(); 431 | if (br.isNull()) return result; 432 | 433 | if (mKeyAxis->orientation() == Qt::Horizontal) { 434 | QPointF firstPoint = QPointF(br.x(), mValueAxis->coordToPixel(mValueAxis->range().upper)); 435 | QPointF lastPoint = QPointF(br.x() + br.width(), mValueAxis->coordToPixel(mValueAxis->range().lower)); 436 | result.addRect(QRectF(firstPoint, lastPoint).normalized()); 437 | } else { 438 | QPointF firstPoint = QPointF(mValueAxis->coordToPixel(mValueAxis->range().lower), br.y()); 439 | QPointF lastPoint = QPointF(mValueAxis->coordToPixel(mValueAxis->range().upper), br.y() + br.height()); 440 | result.addRect(QRectF(firstPoint, lastPoint).normalized()); 441 | } 442 | return result; 443 | } 444 | 445 | -------------------------------------------------------------------------------- /src/qcustomplot/qcpsmoothcurve.h: -------------------------------------------------------------------------------- 1 | #ifndef QCPSMOOTHCURVE_H 2 | #define QCPSMOOTHCURVE_H 3 | 4 | #include "qcustomplot.h" 5 | 6 | class QCP_LIB_DECL QCPSmoothCurve : public QCPGraph 7 | { 8 | Q_OBJECT 9 | public: 10 | explicit QCPSmoothCurve(QCPAxis *keyAxis, QCPAxis *valueAxis); 11 | 12 | void setSmooth(bool smooth) { mSmooth = smooth; } 13 | 14 | protected: 15 | void draw(QCPPainter *painter) override; 16 | void drawLinePlot(QCPPainter *painter, const QVector &lines) const override; 17 | void drawFill(QCPPainter *painter, QVector *lines) const override; 18 | 19 | protected: 20 | QPainterPath getSmoothFillPath(const QVector *lineData, QCPDataRange segment, QPainterPath *clipPath) const; 21 | QPainterPath getSmoothChannelFillPath(const QVector *thisData, QCPDataRange thisSegment, 22 | const QVector *otherData, QCPDataRange otherSegment) const; 23 | QRectF getLinesRect(const QVector& lineData); 24 | QPainterPath getLinesClipPath(const QPolygonF& polygon) const; 25 | 26 | protected: 27 | bool mSmooth; 28 | QVector mSmoothPaths; 29 | QVector mSegments; 30 | QVector mLines; 31 | }; 32 | 33 | #endif // QCPSMOOTHCURVE_H 34 | -------------------------------------------------------------------------------- /src/qcustomplot/qcptextbars.cpp: -------------------------------------------------------------------------------- 1 | #include "qcptextbars.h" 2 | 3 | QCPTextBars::QCPTextBars(QCPAxis *keyAxis, QCPAxis *valueAxis) 4 | : QCPBars(keyAxis, valueAxis) 5 | , mTextAlignment(Qt::AlignCenter) 6 | , mTextVisible(false) 7 | , mSpacing(5) 8 | , mFont(QFont(QLatin1String("sans serif"), 12)) 9 | { 10 | 11 | } 12 | 13 | void QCPTextBars::setTextAlignment(Qt::Alignment alignment) 14 | { 15 | mTextAlignment = alignment; 16 | } 17 | 18 | void QCPTextBars::setTextVisible(bool visible) 19 | { 20 | mTextVisible = visible; 21 | } 22 | 23 | void QCPTextBars::setSpacing(double spacing) 24 | { 25 | mSpacing = spacing; 26 | } 27 | 28 | void QCPTextBars::setFont(const QFont &font) 29 | { 30 | mFont = font; 31 | } 32 | 33 | void QCPTextBars::draw(QCPPainter *painter) 34 | { 35 | if (!mKeyAxis || !mValueAxis) { qDebug() << Q_FUNC_INFO << "invalid key or value axis"; return; } 36 | if (mDataContainer->isEmpty()) return; 37 | 38 | QCPBarsDataContainer::const_iterator visibleBegin, visibleEnd; 39 | getVisibleDataBounds(visibleBegin, visibleEnd); 40 | 41 | // loop over and draw segments of unselected/selected data: 42 | QList selectedSegments, unselectedSegments, allSegments; 43 | getDataSegments(selectedSegments, unselectedSegments); 44 | allSegments << unselectedSegments << selectedSegments; 45 | for (int i=0; i= unselectedSegments.size(); 48 | QCPBarsDataContainer::const_iterator begin = visibleBegin; 49 | QCPBarsDataContainer::const_iterator end = visibleEnd; 50 | mDataContainer->limitIteratorsToDataRange(begin, end, allSegments.at(i)); 51 | if (begin == end) 52 | continue; 53 | 54 | for (QCPBarsDataContainer::const_iterator it=begin; it!=end; ++it) 55 | { 56 | // check data validity if flag set: 57 | #ifdef QCUSTOMPLOT_CHECK_DATA 58 | if (QCP::isInvalidData(it->key, it->value)) 59 | qDebug() << Q_FUNC_INFO << "Data point at" << it->key << "of drawn range invalid." << "Plottable name:" << name(); 60 | #endif 61 | // draw bar: 62 | if (isSelectedSegment && mSelectionDecorator) 63 | { 64 | mSelectionDecorator->applyBrush(painter); 65 | mSelectionDecorator->applyPen(painter); 66 | } else 67 | { 68 | painter->setBrush(mBrush); 69 | painter->setPen(mPen); 70 | } 71 | applyDefaultAntialiasingHint(painter); 72 | 73 | QRectF barRect = getBarRect(it->key, it->value); 74 | painter->drawPolygon(barRect); 75 | 76 | if (mTextVisible) 77 | drawText(painter, it->key, it->value, barRect); 78 | } 79 | } 80 | 81 | // draw other selection decoration that isn't just line/scatter pens and brushes: 82 | if (mSelectionDecorator) 83 | mSelectionDecorator->drawDecoration(painter, selection()); 84 | } 85 | 86 | void QCPTextBars::drawText(QCPPainter *painter, double key, double value, const QRectF &barRect) 87 | { 88 | Q_UNUSED(key) 89 | 90 | painter->setFont(mFont); 91 | QString text = QString::number(value, 'g', 2); // 取得当前value轴的值，保留两位精度 92 | 93 | QRectF textRect = painter->fontMetrics().boundingRect(0, 0, 0, 0, Qt::TextDontClip | mTextAlignment, text); // 计算文字所占用的大小 94 | 95 | if (mKeyAxis.data()->orientation() == Qt::Horizontal) { // 当key轴为水平轴的时候 96 | if (mKeyAxis.data()->axisType() == QCPAxis::atTop) // 上轴，移动文字到柱状图下面 97 | textRect.moveTopLeft(barRect.bottomLeft() + QPointF(0, mSpacing)); 98 | else // 下轴，移动文字到柱状图上面 99 | textRect.moveBottomLeft(barRect.topLeft() - QPointF(0, mSpacing)); 100 | textRect.setWidth(barRect.width()); 101 | painter->drawText(textRect, Qt::TextDontClip | mTextAlignment, text); 102 | } else { // 当key轴为竖直轴的时候 103 | if (mKeyAxis.data()->axisType() == QCPAxis::atLeft) // 左轴，移动文字到柱状图右边 104 | textRect.moveTopLeft(barRect.topRight() + QPointF(mSpacing, 0)); 105 | else // 右轴，移动文字到柱状图左边 106 | textRect.moveTopRight(barRect.topLeft() - QPointF(mSpacing, 0)); 107 | textRect.setHeight(barRect.height()); 108 | painter->drawText(textRect, Qt::TextDontClip | mTextAlignment, text); 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /src/qcustomplot/qcptextbars.h: -------------------------------------------------------------------------------- 1 | #ifndef QCPTEXTBARS_H 2 | #define QCPTEXTBARS_H 3 | 4 | #include "qcustomplot.h" 5 | 6 | class QCP_LIB_DECL QCPTextBars : public QCPBars 7 | { 8 | Q_OBJECT 9 | public: 10 | explicit QCPTextBars(QCPAxis *keyAxis, QCPAxis *valueAxis); 11 | 12 | Qt::Alignment textAligment() const { return mTextAlignment; } 13 | bool textVisible() const { return mTextVisible; } 14 | double spacing() const { return mSpacing; } 15 | QFont font() const { return mFont; } 16 | 17 | void setTextAlignment(Qt::Alignment alignment); 18 | void setTextVisible(bool visible); 19 | void setSpacing(double spacing); 20 | void setFont(const QFont &font); 21 | 22 | protected: 23 | void draw(QCPPainter *painter) Q_DECL_OVERRIDE; 24 | 25 | virtual void drawText(QCPPainter* painter, double key, double value, const QRectF& barRect); 26 | 27 | protected: 28 | Qt::Alignment mTextAlignment; // 文字对齐方式 29 | bool mTextVisible; // 文字是否可见 30 | double mSpacing; // 文字与柱状图的间距，这里按像素大小 31 | QFont mFont; // 文字使用的字体 32 | }; 33 | 34 | #endif // QCPTEXTBARS_H 35 | --------------------------------------------------------------------------------