├── qcustomplot-examples ├── qcustomplot-examples.pro ├── images │ └── crossline.gif ├── readme.md ├── crossline │ ├── main.cpp │ ├── mainwindow.h │ ├── crossline.pro │ └── mainwindow.cpp ├── common.pri └── common │ ├── cursorhelper.h │ ├── customplot.h │ ├── cursorhelper.cpp │ ├── crossline.h │ ├── customplot.cpp │ └── crossline.cpp ├── .gitignore └── LICENSE /qcustomplot-examples/qcustomplot-examples.pro: -------------------------------------------------------------------------------- 1 | TEMPLATE = subdirs 2 | 3 | SUBDIRS += \ 4 | crossline 5 | -------------------------------------------------------------------------------- /qcustomplot-examples/images/crossline.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/lowbees/qcustomplot-examples/HEAD/qcustomplot-examples/images/crossline.gif -------------------------------------------------------------------------------- /qcustomplot-examples/readme.md: -------------------------------------------------------------------------------- 1 | ## CrossLine Examples 2 | ![CrossLine](https://github.com/lowbees/qcustomplot-examples/blob/master/qcustomplot-examples/images/crossline.gif "CrossLine") 3 | -------------------------------------------------------------------------------- /qcustomplot-examples/crossline/main.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include 3 | 4 | int main(int argc, char *argv[]) 5 | { 6 | QApplication a(argc, argv); 7 | MainWindow w; 8 | w.show(); 9 | 10 | return a.exec(); 11 | } 12 | -------------------------------------------------------------------------------- /qcustomplot-examples/crossline/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | 6 | class MainWindow : public QMainWindow 7 | { 8 | Q_OBJECT 9 | 10 | public: 11 | MainWindow(QWidget *parent = 0); 12 | ~MainWindow(); 13 | }; 14 | 15 | #endif // MAINWINDOW_H 16 | -------------------------------------------------------------------------------- /qcustomplot-examples/crossline/crossline.pro: -------------------------------------------------------------------------------- 1 | #------------------------------------------------- 2 | # 3 | # Project created by QtCreator 2019-01-08T19:34:15 4 | # 5 | #------------------------------------------------- 6 | 7 | TARGET = crossline 8 | TEMPLATE = app 9 | 10 | include(../common.pri) 11 | DESTDIR = $$PROJECT_BINDIR 12 | 13 | DEFINES += QT_DEPRECATED_WARNINGS 14 | 15 | SOURCES += main.cpp\ 16 | mainwindow.cpp 17 | 18 | HEADERS += mainwindow.h 19 | 20 | 21 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # C++ objects and libs 2 | *.slo 3 | *.lo 4 | *.o 5 | *.a 6 | *.la 7 | *.lai 8 | *.so 9 | *.dll 10 | *.dylib 11 | 12 | # Qt-es 13 | object_script.*.Release 14 | object_script.*.Debug 15 | *_plugin_import.cpp 16 | /.qmake.cache 17 | /.qmake.stash 18 | *.pro.user 19 | *.pro.user.* 20 | *.qbs.user 21 | *.qbs.user.* 22 | *.moc 23 | moc_*.cpp 24 | moc_*.h 25 | qrc_*.cpp 26 | ui_*.h 27 | *.qmlc 28 | *.jsc 29 | Makefile* 30 | *build-* 31 | 32 | # Qt unit tests 33 | target_wrapper.* 34 | 35 | # QtCreator 36 | *.autosave 37 | 38 | # QtCreator Qml 39 | *.qmlproject.user 40 | *.qmlproject.user.* 41 | 42 | # QtCreator CMake 43 | CMakeLists.txt.user* 44 | 45 | # Folders 46 | qcustomplot-examples/bin 47 | -------------------------------------------------------------------------------- /qcustomplot-examples/common.pri: -------------------------------------------------------------------------------- 1 | QT += core gui printsupport 2 | greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 3 | 4 | PROJECT_BINDIR = $$PWD/bin 5 | PROJECT_LIBDIR = $$PWD/lib 6 | PROJECT_COMMON = $$PWD/common 7 | 8 | HEADERS += $$PROJECT_LIBDIR/qcustomplot.h \ 9 | $$PROJECT_COMMON/cursorhelper.h \ 10 | $$PROJECT_COMMON/customplot.h \ 11 | $$PROJECT_COMMON/crossline.h 12 | 13 | SOURCES += $$PROJECT_LIBDIR/qcustomplot.cpp \ 14 | $$PROJECT_COMMON/cursorhelper.cpp \ 15 | $$PROJECT_COMMON/customplot.cpp \ 16 | $$PROJECT_COMMON/crossline.cpp 17 | 18 | CONFIG += debug_and_release build_all 19 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/cursorhelper.h: -------------------------------------------------------------------------------- 1 | #ifndef CURSORHELPER_H 2 | #define CURSORHELPER_H 3 | 4 | #include 5 | #include 6 | #include 7 | 8 | class CursorHelper : public QObject 9 | { 10 | Q_OBJECT 11 | Q_DISABLE_COPY(CursorHelper) 12 | public: 13 | static CursorHelper *instance(); 14 | static void release(); 15 | 16 | void setCursor(QObject *item, const QCursor &cursor); 17 | QCursor cursor(QObject *item); 18 | 19 | 20 | public Q_SLOTS: 21 | void remove(QObject *item); 22 | 23 | private: 24 | CursorHelper(); 25 | ~CursorHelper(); 26 | private: 27 | static CursorHelper *mInstance; 28 | QHash mCursors; 29 | }; 30 | 31 | #endif // CURSORHELPER_H 32 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/customplot.h: -------------------------------------------------------------------------------- 1 | #ifndef CUSTOMPLOT_H 2 | #define CUSTOMPLOT_H 3 | 4 | #include "../lib/qcustomplot.h" 5 | 6 | class CustomPlot : public QCustomPlot 7 | { 8 | Q_OBJECT 9 | public: 10 | CustomPlot(QWidget *parent = Q_NULLPTR); 11 | virtual ~CustomPlot() Q_DECL_OVERRIDE; 12 | 13 | Q_SIGNALS: 14 | void itemMoved(QCPAbstractItem *item, QMouseEvent *event); 15 | 16 | // QWidget interface 17 | protected: 18 | virtual void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE; 19 | virtual void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE; 20 | virtual void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE; 21 | 22 | // QWidget interface 23 | public: 24 | virtual QSize sizeHint() const Q_DECL_OVERRIDE; 25 | 26 | }; 27 | 28 | #endif // CUSTOMPLOT_H 29 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/cursorhelper.cpp: -------------------------------------------------------------------------------- 1 | #include "cursorhelper.h" 2 | 3 | CursorHelper *CursorHelper::mInstance = Q_NULLPTR; 4 | 5 | CursorHelper *CursorHelper::instance() 6 | { 7 | if (Q_NULLPTR == mInstance) 8 | mInstance = new CursorHelper; 9 | return mInstance; 10 | } 11 | 12 | void CursorHelper::release() 13 | { 14 | delete mInstance; 15 | mInstance = Q_NULLPTR; 16 | } 17 | 18 | void CursorHelper::setCursor(QObject *item, const QCursor &cursor) 19 | { 20 | if (Q_NULLPTR == item) 21 | return; 22 | mCursors[item] = cursor; 23 | connect(item, SIGNAL(destroyed(QObject*)), this, SLOT(remove(QObject*))); 24 | } 25 | 26 | QCursor CursorHelper::cursor(QObject *item) 27 | { 28 | if (Q_NULLPTR == item || !mCursors.contains(item)) 29 | return QCursor(); 30 | return mCursors[item]; 31 | } 32 | 33 | void CursorHelper::remove(QObject *item) 34 | { 35 | mCursors.remove(item); 36 | } 37 | 38 | CursorHelper::CursorHelper() 39 | { 40 | 41 | } 42 | 43 | CursorHelper::~CursorHelper() 44 | { 45 | 46 | } 47 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/crossline.h: -------------------------------------------------------------------------------- 1 | #ifndef CROSSLINE_H 2 | #define CROSSLINE_H 3 | 4 | #include 5 | 6 | class QCustomPlot; 7 | class QCPItemLine; 8 | class QCPItemText; 9 | class QCPItemTracer; 10 | class QCPItemCurve; 11 | class QCPAbstractItem; 12 | class QMouseEvent; 13 | class QCPGraph; 14 | 15 | class CrossLine : public QObject 16 | { 17 | Q_OBJECT 18 | public: 19 | 20 | enum LineMode { 21 | lmFree, 22 | lmFollowCursor, 23 | lmTracing 24 | }; 25 | Q_ENUM(LineMode) 26 | 27 | explicit CrossLine(QCustomPlot *parentPlot, QCPGraph *targetGraph = Q_NULLPTR); 28 | ~CrossLine(); 29 | 30 | void setLineMode(LineMode mode); 31 | LineMode lineMode() const { return mLineMode; } 32 | 33 | void setLineVisible(Qt::Orientation orientation, bool visible = true); 34 | bool lineVisible(Qt::Orientation orientation); 35 | 36 | void setGraph(QCPGraph *graph); 37 | 38 | public Q_SLOTS: 39 | void onMouseMoved(QMouseEvent *event); 40 | void onItemMoved(QCPAbstractItem *item, QMouseEvent *event); 41 | void update(); 42 | 43 | protected: 44 | QCustomPlot *mParentPlot; 45 | QCPItemLine *mHLine, *mVLine; 46 | QCPItemText *mHText, *mVText; 47 | QCPItemTracer *mTracer; 48 | QCPItemText *mTracerText; 49 | QCPItemCurve *mTracerArrow; 50 | QCPGraph *mTargetGraph; 51 | 52 | LineMode mLineMode; 53 | double mKey, mValue; 54 | 55 | protected: 56 | void updateTracer(); 57 | void updateHLine(double value); 58 | void updateVLine(double key); 59 | }; 60 | 61 | #endif // CROSSLINE_H 62 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/customplot.cpp: -------------------------------------------------------------------------------- 1 | #include "customplot.h" 2 | #include "cursorhelper.h" 3 | 4 | CustomPlot::CustomPlot(QWidget *parent) 5 | : QCustomPlot(parent) 6 | { 7 | setSelectionTolerance(6); 8 | } 9 | 10 | CustomPlot::~CustomPlot() 11 | { 12 | CursorHelper::release(); 13 | } 14 | 15 | 16 | void CustomPlot::mousePressEvent(QMouseEvent *event) 17 | { 18 | QCPAbstractItem *item = itemAt(event->localPos()); 19 | if (item && item->selectable()) { 20 | item->setSelected(true); 21 | item->layer()->replot(); 22 | } 23 | QCustomPlot::mousePressEvent(event); 24 | } 25 | 26 | void CustomPlot::mouseReleaseEvent(QMouseEvent *event) 27 | { 28 | QCustomPlot::mouseReleaseEvent(event); 29 | foreach (QCPAbstractItem *item, selectedItems()) { 30 | item->setSelected(false); 31 | item->layer()->replot(); 32 | } 33 | } 34 | 35 | void CustomPlot::mouseMoveEvent(QMouseEvent *event) 36 | { 37 | QCustomPlot::mouseMoveEvent(event); 38 | 39 | QPointF localPos = event->localPos(); 40 | QCPAbstractItem *item = itemAt(localPos); 41 | 42 | QCPAbstractItem *selectedItem = (selectedItems().isEmpty() ? Q_NULLPTR : selectedItems().at(0)); 43 | 44 | // set item cursor 45 | if (item || selectedItem) { 46 | QCPAbstractItem *obj = selectedItem ? selectedItem : item; 47 | QCursor itemCursor = CursorHelper::instance()->cursor(obj); 48 | if (itemCursor.shape() != cursor().shape()) 49 | setCursor(itemCursor); 50 | } else { 51 | if (cursor().shape() != Qt::ArrowCursor) 52 | unsetCursor(); 53 | } 54 | 55 | if (selectedItem && (event->buttons() & Qt::LeftButton)) { 56 | Q_EMIT itemMoved(selectedItem, event); 57 | selectedItem->layer()->replot(); 58 | } 59 | } 60 | 61 | 62 | QSize CustomPlot::sizeHint() const 63 | { 64 | return QSize(400, 300); 65 | } 66 | -------------------------------------------------------------------------------- /qcustomplot-examples/crossline/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "../common/customplot.h" 3 | #include "../common/crossline.h" 4 | 5 | #include 6 | #include 7 | #include 8 | 9 | MainWindow::MainWindow(QWidget *parent) 10 | : QMainWindow(parent) 11 | { 12 | CustomPlot *customPlot = new CustomPlot; 13 | QComboBox *comboBox = new QComboBox; 14 | comboBox->addItems(QStringList() << "Free" << "Follow Cursor" << "Tracing"); 15 | 16 | QVBoxLayout *layout = new QVBoxLayout; 17 | layout->addWidget(comboBox); 18 | layout->addWidget(customPlot); 19 | 20 | QWidget *widget = new QWidget; 21 | 22 | widget->setLayout(layout); 23 | setCentralWidget(widget); 24 | 25 | customPlot->addGraph(customPlot->xAxis, customPlot->yAxis); 26 | customPlot->graph()->setPen(QPen(Qt::blue)); 27 | customPlot->graph()->setBrush(QBrush(QColor(0, 0, 255, 20))); 28 | 29 | QVector x(251), y0(251); 30 | for (int i = 0; i < 251; ++i) { 31 | x[i] = i; 32 | y0[i] = qExp(-i / 150.0) * qCos(i / 10.0); 33 | } 34 | customPlot->graph()->setData(x, y0); 35 | customPlot->graph()->rescaleAxes(); 36 | customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectItems); 37 | 38 | CrossLine *crossLine = new CrossLine(customPlot, customPlot->graph()); 39 | connect(comboBox, static_cast(&QComboBox::currentIndexChanged), [crossLine](int index) { 40 | crossLine->setLineMode(CrossLine::LineMode(index)); 41 | }); 42 | connect(customPlot, SIGNAL(itemMoved(QCPAbstractItem*,QMouseEvent*)), 43 | crossLine, SLOT(onItemMoved(QCPAbstractItem*,QMouseEvent*))); 44 | 45 | // we don't want to drag when item is selected. 46 | connect(customPlot, &QCustomPlot::mousePress, [customPlot](QMouseEvent *event) { 47 | if (customPlot->itemAt(event->localPos()) && !customPlot->selectedItems().isEmpty()) 48 | customPlot->setInteractions(QCP::iRangeZoom | QCP::iSelectItems); 49 | }); 50 | connect(customPlot, &QCustomPlot::mouseRelease, [customPlot](){ 51 | customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectItems); 52 | }); 53 | 54 | showMaximized(); 55 | } 56 | 57 | MainWindow::~MainWindow() 58 | { 59 | } 60 | -------------------------------------------------------------------------------- /qcustomplot-examples/common/crossline.cpp: -------------------------------------------------------------------------------- 1 | #include "crossline.h" 2 | #include "cursorhelper.h" 3 | #include "../lib/qcustomplot.h" 4 | #include 5 | #include 6 | 7 | CrossLine::CrossLine(QCustomPlot *parentPlot, QCPGraph *targetGraph) 8 | : QObject(parentPlot) 9 | , mParentPlot(parentPlot) 10 | , mHLine(new QCPItemLine(parentPlot)) 11 | , mVLine(new QCPItemLine(parentPlot)) 12 | , mHText(new QCPItemText(parentPlot)) 13 | , mVText(new QCPItemText(parentPlot)) 14 | , mTracer(new QCPItemTracer(parentPlot)) 15 | , mTracerText(new QCPItemText(parentPlot)) 16 | , mTracerArrow(new QCPItemCurve(parentPlot)) 17 | , mTargetGraph(Q_NULLPTR) 18 | , mKey(0) 19 | , mValue(0) 20 | { 21 | const QString layer(QStringLiteral("overlay")); 22 | const QMargins margins(6, 6, 6, 6); 23 | 24 | targetGraph = targetGraph ? targetGraph : mParentPlot->graph(); 25 | 26 | setGraph(targetGraph); 27 | setLineMode(lmFree); 28 | 29 | mTracer->setBrush(Qt::red); 30 | mTracer->setInterpolating(true); 31 | mTracer->setStyle(QCPItemTracer::tsCircle); 32 | 33 | mTracerText->setSelectable(false); 34 | mTracerText->setPadding(margins); 35 | mTracerText->position->setParentAnchor(mTracer->position); 36 | mTracerText->position->setType(QCPItemPosition::ptAbsolute); 37 | 38 | mTracerArrow->start->setParentAnchor(mTracerText->left); 39 | mTracerArrow->startDir->setParentAnchor(mTracerArrow->start); 40 | mTracerArrow->end->setParentAnchor(mTracer->position); 41 | mTracerArrow->endDir->setParentAnchor(mTracerArrow->end); 42 | mTracerArrow->setHead(QCPLineEnding::esSpikeArrow); 43 | mTracerArrow->setTail(QCPLineEnding(QCPLineEnding::esBar, 44 | (mTracerText->bottom->pixelPosition().y() - 45 | mTracerText->top->pixelPosition().y()) * 0.85)); 46 | 47 | mHLine->start->setType(QCPItemPosition::ptAbsolute); 48 | mHLine->end->setType(QCPItemPosition::ptAbsolute); 49 | mVLine->start->setType(QCPItemPosition::ptAbsolute); 50 | mVLine->end->setType(QCPItemPosition::ptAbsolute); 51 | 52 | mHLine->setLayer(layer); 53 | mVLine->setLayer(layer); 54 | mTracer->setLayer(layer); 55 | mTracerText->setLayer(layer); 56 | mTracerArrow->setLayer(layer); 57 | 58 | mHText->setPadding(margins); 59 | mHText->setLayer(layer); 60 | mVText->setPadding(margins); 61 | mVText->setLayer(layer); 62 | 63 | connect(parentPlot, SIGNAL(afterReplot()), this, SLOT(update())); 64 | } 65 | 66 | CrossLine::~CrossLine() 67 | { 68 | 69 | } 70 | 71 | void CrossLine::setLineMode(CrossLine::LineMode mode) 72 | { 73 | CursorHelper *helper = CursorHelper::instance(); 74 | 75 | mTracer->setVisible(mode == lmTracing); 76 | mTracerText->setVisible(mode == lmTracing); 77 | mTracerArrow->setVisible(mode == lmTracing); 78 | mHLine->setSelectable(mode == lmFree); 79 | mVLine->setSelectable(mode != lmFollowCursor); 80 | 81 | if (mode == lmFollowCursor) { 82 | connect(mParentPlot, SIGNAL(mouseMove(QMouseEvent*)), 83 | this, SLOT(onMouseMoved(QMouseEvent*))); 84 | 85 | helper->remove(mHLine); 86 | helper->remove(mVLine); 87 | } else { 88 | disconnect(mParentPlot, SIGNAL(mouseMove(QMouseEvent*)), 89 | this, SLOT(onMouseMoved(QMouseEvent*))); 90 | 91 | if (mTargetGraph->keyAxis()->orientation() == Qt::Horizontal) { 92 | helper->setCursor(mVLine, QCursor(Qt::SizeHorCursor)); 93 | helper->setCursor(mHLine, QCursor(Qt::SizeVerCursor)); 94 | } else { 95 | helper->setCursor(mVLine, QCursor(Qt::SizeVerCursor)); 96 | helper->setCursor(mHLine, QCursor(Qt::SizeHorCursor)); 97 | } 98 | 99 | if (mode == lmTracing) { 100 | mTracer->setGraphKey(mKey); 101 | helper->remove(mHLine); 102 | } 103 | } 104 | mLineMode = mode; 105 | update(); 106 | } 107 | 108 | /*! 109 | Set \a orientation line to show or hide. 110 | \note Note: The vertical line is always perpendicular to the keyAxis, and the horizontal line perpendicular to the valueAxis. 111 | */ 112 | void CrossLine::setLineVisible(Qt::Orientation orientation, bool visible) 113 | { 114 | if (mTargetGraph->keyAxis()->orientation() == Qt::Horizontal) { 115 | QCPItemLine *line = (orientation == Qt::Horizontal ? mHLine : mVLine); 116 | QCPItemText *text = (orientation == Qt::Horizontal ? mHText : mVText); 117 | line->setVisible(visible); 118 | text->setVisible(visible); 119 | } else { 120 | QCPItemLine *line = (orientation == Qt::Vertical ? mHLine : mVLine); 121 | QCPItemText *text = (orientation == Qt::Vertical ? mHText : mVText); 122 | line->setVisible(visible); 123 | text->setVisible(visible); 124 | } 125 | } 126 | 127 | bool CrossLine::lineVisible(Qt::Orientation orientation) 128 | { 129 | if (mTargetGraph->keyAxis()->orientation() == Qt::Horizontal) { 130 | QCPItemLine *line = (orientation == Qt::Horizontal ? mHLine : mVLine); 131 | return line->visible(); 132 | } else { 133 | QCPItemLine *line = (orientation == Qt::Vertical ? mHLine : mVLine); 134 | return line->visible(); 135 | } 136 | } 137 | 138 | /*! 139 | Set the \a graph which tracer sticks to. And only vertical line can be moved. 140 | To free the tracer from any tracer, set \a graph to 0. 141 | Set \a graph to 0 means that horizontal line and vertical line can be moved individually. 142 | */ 143 | void CrossLine::setGraph(QCPGraph *graph) 144 | { 145 | mTracer->setGraph(graph); 146 | mTracer->setGraphKey(0); 147 | 148 | mTargetGraph = graph ? graph : (mTargetGraph ? mTargetGraph : mParentPlot->graph()); 149 | 150 | if (mTargetGraph->keyAxis()->orientation() == Qt::Horizontal) { 151 | mHText->position->setParentAnchor(mHLine->start); 152 | mVText->position->setParentAnchor(mVLine->end); 153 | } else { 154 | mHText->position->setParentAnchor(mHLine->end); 155 | mVText->position->setParentAnchor(mVLine->start); 156 | } 157 | } 158 | 159 | void CrossLine::onMouseMoved(QMouseEvent *event) 160 | { 161 | mTargetGraph->pixelsToCoords(event->localPos(), mKey, mValue); 162 | update(); 163 | } 164 | 165 | void CrossLine::onItemMoved(QCPAbstractItem *item, QMouseEvent *event) 166 | { 167 | if (item == Q_NULLPTR || (item != mVLine && item != mHLine)) 168 | return; 169 | 170 | QCPAxis *keyAxis = mTargetGraph->keyAxis(); 171 | QCPAxis *valueAxis = mTargetGraph->valueAxis(); 172 | 173 | QPointF localPos = event->localPos(); 174 | double key, value; 175 | 176 | if (keyAxis->orientation() == Qt::Horizontal) { 177 | key = keyAxis->pixelToCoord(localPos.x()); 178 | value = valueAxis->pixelToCoord(localPos.y()); 179 | } else { 180 | key = keyAxis->pixelToCoord(localPos.y()); 181 | value = valueAxis->pixelToCoord(localPos.x()); 182 | } 183 | 184 | if (mLineMode == lmTracing) { 185 | mTracer->setGraphKey(key); 186 | } else { 187 | if (item == mHLine) mValue = value; 188 | else mKey = key; 189 | } 190 | 191 | update(); 192 | } 193 | 194 | void CrossLine::update() 195 | { 196 | updateTracer(); 197 | updateHLine(mValue); 198 | updateVLine(mKey); 199 | // we just want replot individual by use overlay layer 200 | if (mParentPlot->isVisible() && mParentPlot->layer("overlay")->visible()) // for some cases we need to do this 201 | mParentPlot->layer("overlay")->replot(); 202 | } 203 | 204 | void CrossLine::updateTracer() 205 | { 206 | if (mLineMode != lmTracing) 207 | return; 208 | 209 | mTracer->updatePosition(); 210 | mKey = mTracer->position->key(); 211 | mValue = mTracer->position->value(); 212 | 213 | QRect rect = mTargetGraph->keyAxis()->axisRect()->rect(); 214 | QPointF center = rect.center(); 215 | QPointF pixel = mTracer->position->pixelPosition(); 216 | 217 | Qt::Alignment alignment = Qt::AlignTop | Qt::AlignLeft; 218 | double offset = qMax(rect.width(), rect.height()) / double(8.0); 219 | double offsetX, offsetY; 220 | 221 | const int endOffset = 10; 222 | const int endDirOffset = 30; 223 | const int startDirOffset = 40; 224 | 225 | if (pixel.x() <= center.x()) { 226 | alignment = Qt::AlignLeft; 227 | offsetX = offset; 228 | mTracerArrow->start->setParentAnchor(mTracerText->left); 229 | mTracerArrow->startDir->setCoords(-startDirOffset, 0); 230 | mTracerArrow->end->setCoords(endOffset, 0); 231 | mTracerArrow->endDir->setCoords(endDirOffset, 0); 232 | } else { 233 | alignment = Qt::AlignRight; 234 | offsetX = -offset; 235 | mTracerArrow->start->setParentAnchor(mTracerText->right); 236 | mTracerArrow->startDir->setCoords(startDirOffset, 0); 237 | mTracerArrow->end->setCoords(-endOffset, 0); 238 | mTracerArrow->endDir->setCoords(-endDirOffset, 0); 239 | } 240 | if (pixel.y() <= center.y()) { 241 | alignment |= Qt::AlignTop; 242 | offsetY = offset; 243 | mTracerArrow->end->setCoords(mTracerArrow->end->coords().x(), endOffset); 244 | mTracerArrow->endDir->setCoords(mTracerArrow->endDir->coords().x(), endDirOffset); 245 | } else { 246 | alignment |= Qt::AlignBottom; 247 | offsetY = -offset; 248 | mTracerArrow->end->setCoords(mTracerArrow->end->coords().x(), -endOffset); 249 | mTracerArrow->endDir->setCoords(mTracerArrow->endDir->coords().x(), -endDirOffset); 250 | } 251 | mTracerText->position->setCoords(offsetX, offsetY); 252 | mTracerText->setPositionAlignment(alignment); 253 | mTracerText->setText(QString("(%1, %2)").arg(mKey, 0, 'f', 2).arg(mValue, 0, 'f', 2)); 254 | } 255 | 256 | void CrossLine::updateHLine(double value) 257 | { 258 | QCPAxis *valueAxis = mTargetGraph->valueAxis(); 259 | QRect rect = valueAxis->axisRect()->rect(); 260 | QPointF center = rect.center(); 261 | 262 | mHText->setText(QString::number(value, 'f', 2)); 263 | mValue = value; 264 | 265 | value = valueAxis->coordToPixel(value); 266 | 267 | if (valueAxis->orientation() == Qt::Vertical) { 268 | mHLine->start->setCoords(rect.left(), value); 269 | mHLine->end->setCoords(rect.right(), value); 270 | Qt::Alignment alignment = (value >= center.y() ? Qt::AlignBottom : Qt::AlignTop) | Qt::AlignLeft; 271 | mHText->setPositionAlignment(alignment); 272 | } else { 273 | mHLine->start->setCoords(value, rect.top()); 274 | mHLine->end->setCoords(value, rect.bottom()); 275 | Qt::Alignment alignment = (value >= center.x() ? Qt::AlignRight : Qt::AlignLeft) | Qt::AlignBottom; 276 | mHText->setPositionAlignment(alignment); 277 | } 278 | } 279 | 280 | void CrossLine::updateVLine(double key) 281 | { 282 | QCPAxis *keyAxis = mTargetGraph->keyAxis(); 283 | QRect rect = keyAxis->axisRect()->rect(); 284 | QPointF center = rect.center(); 285 | 286 | mVText->setText(QString::number(key, 'f', 2)); 287 | mKey = key; 288 | 289 | key = keyAxis->coordToPixel(key); 290 | 291 | if (keyAxis->orientation() == Qt::Horizontal) { 292 | mVLine->start->setCoords(key, rect.top()); 293 | mVLine->end->setCoords(key, rect.bottom()); 294 | Qt::Alignment alignment = (key >= center.x() ? Qt::AlignRight : Qt::AlignLeft) | Qt::AlignBottom; 295 | mVText->setPositionAlignment(alignment); 296 | } else { 297 | mVLine->start->setCoords(rect.left(), key); 298 | mVLine->end->setCoords(rect.right(), key); 299 | Qt::Alignment alignment = (key >= center.y() ? Qt::AlignBottom : Qt::AlignTop) | Qt::AlignLeft; 300 | mVText->setPositionAlignment(alignment); 301 | } 302 | } 303 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 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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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. 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 | --------------------------------------------------------------------------------