├── .gitignore ├── LICENSE ├── README.md ├── main.cpp ├── mainwindow.cpp ├── mainwindow.h ├── mainwindow.ui └── qgis_demo.pro /.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 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | 294 | Copyright (C) 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | , 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Introduction 2 | An simple QGIS 3.x demo using C++ API containing map canvas and layer tree view. You can use this project to configure your development environment.The following paths of QGIS in **qgis_demo.pro** and **main.cpp** should be replaced by yours. 3 | 4 | 5 | 一个简单的QGIS 3.x 版本二次开发的demo，包含地图画布控件和图层树控件，可以用于开发环境的配置。使用时需要将**qgis_demo.pro**文件与**main.cpp**文件中以下路径替换为自己的下载路径。 6 | 7 | 8 | ``` 9 | INCLUDEPATH += "D:/OSGeo4W64/apps/qgis/include" 10 | INCLUDEPATH += "D:/OSGeo4W64/include" 11 | 12 | LIBS += -L"D:/OSGeo4W64/apps/qgis/lib" -lqgis_core -lqgis_gui 13 | ``` 14 | 15 | 16 | ``` 17 | QgsApplication::setPrefixPath("D:/OSGeo4W64/apps/qgis", true); 18 | ``` 19 | -------------------------------------------------------------------------------- /main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "mainwindow.h" 5 | int main(int argc, char *argv[]) 6 | { 7 | QgsApplication a(argc, argv, true); 8 | QgsApplication::setPrefixPath("D:/OSGeo4W64/apps/qgis", true); 9 | QgsApplication::initQgis(); 10 | MainWindow w; 11 | w.show(); 12 | return a.exec(); 13 | } 14 | -------------------------------------------------------------------------------- /mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "ui_mainwindow.h" 3 | 4 | #include 5 | #include 6 | #include 7 | 8 | #include 9 | 10 | #include 11 | 12 | #include 13 | #include "qgslayertreeviewdefaultactions.h" 14 | 15 | MainWindow *MainWindow::sInstance = nullptr; 16 | MainWindow::MainWindow(QWidget *parent) : 17 | QMainWindow(parent), 18 | ui(new Ui::MainWindow) 19 | { 20 | sInstance = this; 21 | ui->setupUi(this); 22 | 23 | QWidget *centralWidget = this->centralWidget(); 24 | QGridLayout *centralLayout = new QGridLayout( centralWidget ); 25 | centralWidget->setLayout( centralLayout ); 26 | centralLayout->setContentsMargins( 0, 0, 0, 0 ); 27 | 28 | mMapCanvas = new QgsMapCanvas(centralWidget); 29 | mMapCanvas->setVisible(true); 30 | mMapCanvas->enableAntiAliasing(true); 31 | 32 | 33 | mCentralContainer = new QStackedWidget; 34 | mCentralContainer->insertWidget( 0, mMapCanvas ); 35 | centralLayout->addWidget( mCentralContainer, 0, 0, 2, 1 ); 36 | mCentralContainer->setCurrentIndex(0); 37 | 38 | mInfoBar = new QgsMessageBar( centralWidget ); 39 | mInfoBar->setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed ); 40 | centralLayout->addWidget( mInfoBar, 0, 0, 1, 1 ); 41 | 42 | mLayerTreeView = new QgsLayerTreeView( this ); 43 | mLayerTreeView->setObjectName( QStringLiteral( "theLayerTreeView" ) ); // "theLayerTreeView" used to find this canonical instance later 44 | 45 | initLayerTreeView(); 46 | creatOverview(); 47 | 48 | connect(ui->actionAddVectorLayer, &QAction::triggered, this, &MainWindow::addVectorLayers); 49 | connect(ui->actionAddRasterLayer, &QAction::triggered, this, &MainWindow::addRasterLayers); 50 | } 51 | 52 | MainWindow::~MainWindow() 53 | { 54 | delete ui; 55 | } 56 | 57 | 58 | void MainWindow::addVectorLayers() 59 | { 60 | mMapCanvas->freeze(); 61 | 62 | QgsSettings settings; 63 | QString lastUsedDir = settings.value( QStringLiteral( "UI/lastOgrDir" ), QDir::homePath() ).toString(); 64 | 65 | QStringList filePaths = QFileDialog::getOpenFileNames(this, 66 | tr("Add Vector Layer"), 67 | lastUsedDir, 68 | "OGR layers(*.shp *.geojson *.gmt *.kml)"); 69 | 70 | if(filePaths.isEmpty()) 71 | { 72 | return; 73 | } 74 | for(QStringList::iterator it = filePaths.begin(); it != filePaths.end(); it++) 75 | { 76 | QString baseName = QFileInfo(*it).completeBaseName(); 77 | QgsVectorLayer *layer = new QgsVectorLayer(*it, baseName, "ogr"); 78 | if( !layer || !layer->isValid()) 79 | { 80 | QMessageBox::critical(this, tr("Error"), tr("Failed to open file\n%1").arg(*it)); 81 | return; 82 | } 83 | addVectorLayer(layer); 84 | } 85 | mMapCanvas->freeze(false); 86 | mMapCanvas->refresh(); 87 | 88 | QFileInfo fi( filePaths.at(0) ); 89 | QString path = fi.path(); 90 | settings.setValue( QStringLiteral( "UI/lastOgrDir" ), path ); 91 | } 92 | 93 | bool MainWindow::addVectorLayer(QgsVectorLayer *layer) 94 | { 95 | if(!layer) 96 | { 97 | qDebug() << "no vector layer"; 98 | return false; 99 | } 100 | if(!layer->isValid()) 101 | { 102 | qDebug() << "invalid vector layer"; 103 | delete layer; 104 | return false; 105 | } 106 | 107 | // register this layer with the central layers registry 108 | QList myList; 109 | myList << layer; 110 | QgsProject::instance()->addMapLayers( myList ); 111 | qDebug() << "add layer, crs of project:" << QgsProject::instance()->crs().authid() << "," << QgsProject::instance()->crs().description(); 112 | 113 | QgsLayerTreeLayer *layerTreeLayer = new QgsLayerTreeLayer(layer); 114 | qDebug() << layerTreeLayer->name(); 115 | 116 | return true; 117 | } 118 | 119 | void MainWindow::addRasterLayers() 120 | { 121 | mMapCanvas->freeze(); 122 | 123 | QgsSettings settings; 124 | QString lastUsedDir = settings.value( QStringLiteral( "UI/lastGdalDir" ), QDir::homePath() ).toString(); 125 | 126 | //QString filter = "NetCDF(*.grd *.GRD)";//默认过滤名测试 127 | QStringList filePaths = QFileDialog::getOpenFileNames(this, 128 | tr("Add Raster Layer(s)"), 129 | lastUsedDir, 130 | "Raster layers(*.tif *.img *.grd *.hgt)"); 131 | 132 | if(filePaths.isEmpty()) 133 | { 134 | return; 135 | } 136 | for(QStringList::iterator it = filePaths.begin(); it != filePaths.end(); it++) 137 | { 138 | QString baseName = QFileInfo(*it).completeBaseName(); 139 | QgsRasterLayer *layer = new QgsRasterLayer(*it, baseName, "gdal"); 140 | if( !layer || !layer->isValid()) 141 | { 142 | return; 143 | } 144 | addRasterLayer(layer); 145 | } 146 | mMapCanvas->freeze(false); 147 | mMapCanvas->updateScale(); 148 | mMapCanvas->refresh(); 149 | 150 | QFileInfo fi( filePaths.at(0) ); 151 | QString path = fi.path(); 152 | settings.setValue( QStringLiteral( "UI/lastGdalDir" ), path ); 153 | } 154 | 155 | bool MainWindow::addRasterLayer(QgsRasterLayer *layer) 156 | { 157 | if ( ! layer ) 158 | { 159 | return false; 160 | } 161 | 162 | if ( !layer->isValid() ) 163 | { 164 | delete layer; 165 | return false; 166 | } 167 | 168 | // register this layer with the central layers registry 169 | QList myList; 170 | myList << layer; 171 | QgsProject::instance()->addMapLayers( myList ); 172 | 173 | return true; 174 | } 175 | 176 | void MainWindow::initLayerTreeView() 177 | { 178 | mLayerTreeDock = new QgsDockWidget( tr( "Layers" ), this ); 179 | mLayerTreeDock->setObjectName( QStringLiteral( "Layers" ) ); 180 | mLayerTreeDock->setAllowedAreas( Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea ); 181 | 182 | QgsLayerTreeModel *model = new QgsLayerTreeModel( QgsProject::instance()->layerTreeRoot(), this ); 183 | 184 | model->setFlag( QgsLayerTreeModel::AllowNodeReorder ); 185 | model->setFlag( QgsLayerTreeModel::AllowNodeRename ); 186 | model->setFlag( QgsLayerTreeModel::AllowNodeChangeVisibility ); 187 | model->setFlag( QgsLayerTreeModel::ShowLegendAsTree ); 188 | model->setFlag( QgsLayerTreeModel::UseEmbeddedWidgets ); 189 | model->setAutoCollapseLegendNodes( 10 ); 190 | 191 | mLayerTreeView->setModel( model ); 192 | 193 | QVBoxLayout *vboxLayout = new QVBoxLayout; 194 | vboxLayout->setMargin( 0 ); 195 | vboxLayout->setContentsMargins( 0, 0, 0, 0 ); 196 | vboxLayout->setSpacing( 0 ); 197 | vboxLayout->addWidget( mLayerTreeView ); 198 | 199 | QWidget *w = new QWidget; 200 | w->setLayout( vboxLayout ); 201 | mLayerTreeDock->setWidget( w ); 202 | addDockWidget( Qt::LeftDockWidgetArea, mLayerTreeDock ); 203 | 204 | mLayerTreeCanvasBridge = new QgsLayerTreeMapCanvasBridge( QgsProject::instance()->layerTreeRoot(), mMapCanvas, this ); 205 | } 206 | 207 | void MainWindow::creatOverview() 208 | { 209 | mOverviewCanvas = new QgsMapOverviewCanvas( nullptr, mMapCanvas ); 210 | mOverviewCanvas->setBackgroundColor(QColor(Qt::white)); 211 | 212 | QCursor mOverviewMapCursor( Qt::OpenHandCursor ); 213 | mOverviewCanvas->setCursor( mOverviewMapCursor ); 214 | mOverviewDock = new QgsDockWidget( tr( "Overview" ), this ); 215 | 216 | mOverviewDock->setObjectName( QStringLiteral( "Overview" ) ); 217 | mOverviewDock->setAllowedAreas( Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea ); 218 | mOverviewDock->setWidget( mOverviewCanvas ); 219 | addDockWidget( Qt::LeftDockWidgetArea, mOverviewDock ); 220 | 221 | mLayerTreeCanvasBridge->setOverviewCanvas( mOverviewCanvas ); 222 | } 223 | -------------------------------------------------------------------------------- /mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | 19 | namespace Ui 20 | { 21 | class MainWindow; 22 | } 23 | 24 | class MainWindow : public QMainWindow 25 | { 26 | Q_OBJECT 27 | 28 | public: 29 | explicit MainWindow(QWidget *parent = 0); 30 | ~MainWindow(); 31 | 32 | QgsLayerTreeView *layerTreeView() 33 | { 34 | return mLayerTreeView; 35 | } 36 | 37 | QgsLayerTreeMapCanvasBridge *layerTreeCanvasBridge() 38 | { 39 | return mLayerTreeCanvasBridge; 40 | } 41 | 42 | public slots: 43 | void addVectorLayers(); 44 | bool addVectorLayer(QgsVectorLayer *layer); 45 | 46 | void addRasterLayers(); 47 | bool addRasterLayer(QgsRasterLayer *layer); 48 | 49 | private slots: 50 | 51 | 52 | private: 53 | Ui::MainWindow *ui; 54 | static MainWindow *sInstance; 55 | 56 | QgsMapCanvas *mMapCanvas = nullptr; 57 | QgsMapOverviewCanvas *mOverviewCanvas = nullptr; 58 | 59 | QgsLayerTreeView *mLayerTreeView = nullptr; 60 | QgsLayerTreeMapCanvasBridge *mLayerTreeCanvasBridge = nullptr; 61 | 62 | QgsDockWidget *mLayerTreeDock = nullptr; 63 | QgsDockWidget *mOverviewDock = nullptr; 64 | QStackedWidget *mCentralContainer = nullptr; 65 | QgsMessageBar *mInfoBar = nullptr; 66 | 67 | void initLayerTreeView(); 68 | void creatOverview(); 69 | 70 | 71 | }; 72 | 73 | #endif // MAINWINDOW_H 74 | -------------------------------------------------------------------------------- /mainwindow.ui: -------------------------------------------------------------------------------- 1 | 2 | 3 | MainWindow 4 | 5 | 6 | 7 | 0 8 | 0 9 | 400 10 | 300 11 | 12 | 13 | 14 | MainWindow 15 | 16 | 17 | 18 | 19 | 20 | 0 21 | 0 22 | 400 23 | 23 24 | 25 | 26 | 27 | 28 | File(&F) 29 | 30 | 31 | 32 | 33 | 34 | Layer(&L) 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | TopToolBarArea 45 | 46 | 47 | false 48 | 49 | 50 | 51 | 52 | 53 | Open 54 | 55 | 56 | 57 | 58 | Add Vector Layer 59 | 60 | 61 | 62 | 63 | Add Raster Layer 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | -------------------------------------------------------------------------------- /qgis_demo.pro: -------------------------------------------------------------------------------- 1 | #------------------------------------------------- 2 | # 3 | # Project created by QtCreator 2019-06-11T20:13:24 4 | # 5 | #------------------------------------------------- 6 | 7 | QT += core gui xml 8 | 9 | greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 10 | 11 | TARGET = qgis_demo 12 | TEMPLATE = app 13 | 14 | DESTDIR = ../qgis_demo_app 15 | 16 | # The following define makes your compiler emit warnings if you use 17 | # any feature of Qt which has been marked as deprecated (the exact warnings 18 | # depend on your compiler). Please consult the documentation of the 19 | # deprecated API in order to know how to port your code away from it. 20 | DEFINES += QT_DEPRECATED_WARNINGS 21 | 22 | # You can also make your code fail to compile if you use deprecated APIs. 23 | # In order to do so, uncomment the following line. 24 | # You can also select to disable deprecated APIs only up to a certain version of Qt. 25 | #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 26 | 27 | 28 | SOURCES += \ 29 | main.cpp \ 30 | mainwindow.cpp 31 | 32 | HEADERS += \ 33 | mainwindow.h 34 | 35 | FORMS += \ 36 | mainwindow.ui 37 | 38 | INCLUDEPATH += "D:/OSGeo4W64/apps/qgis/include" 39 | INCLUDEPATH += "D:/OSGeo4W64/include" 40 | 41 | LIBS += -L"D:/OSGeo4W64/apps/qgis/lib" -lqgis_core -lqgis_gui 42 | 43 | DEFINES += CORE_EXPORT=__declspec(dllimport) 44 | DEFINES += GUI_EXPORT=__declspec(dllimport) 45 | --------------------------------------------------------------------------------