QCAD MainWindow 原型

一个简单QCAD窗体原型应用程序。

准备界面UI

\\support\\examples\\mainwindow\\MyDisplay.ui
QFrame类型的Viewport00用来加载View渲染QCAD实体对象。这里对应于模板
\\scripts\\Widgets\\ViewportWidget\\Templates\\00_Single.ui。

• MyDisplay.ui
  
• 00_Single.ui
  

渲染的基本流程

构造函数中，模拟了加载QCAD加载dxf到绘制的基本流程。

MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
{
    resize(800, 600);
    createMenu();
    // init script handler for ECMAScript:
    RScriptHandlerRegistry::registerScriptHandler(
        RScriptHandlerEcma::factory,
        RScriptHandlerEcma::getSupportedFileExtensionsStatic()
    );
    RScriptHandlerEcma* handler = 
        dynamic_cast<RScriptHandlerEcma*>(RScriptHandlerRegistry::getGlobalScriptHandler("js"));
    //QString autofile;
    //handler->init(autofile);
    // create central widget from UI file:
    // this widget contains a child called 'Viewport00'. This child
    // widget will be filled with our graphics display with scroll
    // bars, etc.
    QString uiFileName = "support/examples/mainwindow/MyDisplay.ui";
    QFile file(uiFileName);
    if (!file.open(QIODevice::ReadOnly)) {
        qWarning() << "Cannot open file " << uiFileName;
        return;
    }

    QUiLoader* loader = new QUiLoader();
    QWidget* widget = loader->load(&file, this);
    file.close();

    setCentralWidget(widget);

    // create drawing document with document interface:
    RMemoryStorage* storage = new RMemoryStorage();
    RSpatialIndexNavel* spatialIndex = new RSpatialIndexNavel();
    RDocument* document = new RDocument(*storage, *spatialIndex);
    documentInterface = new RDocumentInterface(*document);

    // import a DXF file into the drawing:
    //documentInterface->importFile("support/examples/mainwindow/drawing_file_to_display.dxf");

    // operation used to add various objects:
    RAddObjectOperation* op;

    // add a layer 'MyLayer':
    QSharedPointer<RLayer> layer = 
        QSharedPointer<RLayer>(
            new RLayer(document, "MyLayer")
        );
    layer->setLinetypeId(document->getLinetypeId("continuous"));
    layer->setLineweight(RLineweight::Weight025);
    layer->setColor(RColor(255,0,0));

    op = new RAddObjectOperation(layer);
    documentInterface->applyOperation(op);
    RLayer::Id layerId = layer->getId();
    

    // create and add a line entity:
    QSharedPointer<RLineEntity> lineEntity = 
        QSharedPointer<RLineEntity>(
            new RLineEntity(document, RLineData(RVector(0,0), RVector(100,0)))
        );

    // set attributes:
    lineEntity->setLayerId(layerId);
    lineEntity->setColor(RColor(0,128,255));
    lineEntity->setLinetypeId(document->getLinetypeId("dashed"));
    lineEntity->setLineweight(RLineweight::Weight100);

    // set a custom property:
    lineEntity->setCustomProperty("MyApp", "MyIntProperty", 77);
    lineEntity->setCustomProperty("MyApp", "MyStringProperty", "Some text");

    op = new RAddObjectOperation(
        lineEntity, 
        false       // false: don't use current attributes but 
                    //        custom attributes set above
    );

    // add the line entity to the drawing:
    documentInterface->applyOperation(op);


    // make 'widget' and 'documentInterface' available for the script engine:
    QScriptEngine& engine = handler->getScriptEngine();
    QScriptValue globalObject = engine.globalObject();
    globalObject.setProperty("widget", engine.newQObject(widget));
    globalObject.setProperty("documentInterface", qScriptValueFromValue(&engine, documentInterface));

    // call script to initialize viewport (add scroll bars, rulers, etc.):
    handler->doScript("support/examples/mainwindow/init_viewport.js");
}

void MainWindow::showEvent(QShowEvent* event) {
    Q_UNUSED(event)

    // trigger auto zoom on first show only:
    static bool first = true;

    if (first) {
        documentInterface->autoZoom();
        first = false;
    }
}

support/examples/mainwindow/init_viewport.js

include('scripts/Widgets/ViewportWidget/ViewportWidget.js');

var viewports = ViewportWidget.getViewports(widget, documentInterface);

// creates a scene for the view,
// attaches the scene to the document interface,
// sets default navigation,
// adds scrollbars and rulers:
ViewportWidget.initializeViewports(viewports);

// init event handlers for drag and drop and scrolling:
ViewportWidget.initEventHandler(viewports);

应用程序入口

一些初始化操作、加载插件和显示窗口等等。

\\support\\examples\\mainwindow\\main.cpp（简单版）
\\src\\run\\main.cpp（复杂版）

//`\\support\\examples\\mainwindow\\main.cpp`
int main(int argc, char **argv)
{
    QApplication* app = new QApplication(argc, argv);

    // set current working directory:
    QDir::setCurrent(RSettings::getApplicationPath());

    // only use plugins dir of QCAD, none of the default plugin dirs of Qt self:
    app->setLibraryPaths(QStringList() << RSettings::getPluginPath());

    qRegisterMetaType<RColor>();

    qRegisterMetaTypeStreamOperators<RColor>("RColor");

    qRegisterMetaType<RVector>();

    qRegisterMetaTypeStreamOperators<RVector>("RVector");

    RMath::init();
    // compile font list from 'fonts' dir:
    RFontList::init();

    // compile hatch pattern lists from 'patterns' dir:
    RPatternListMetric::init();
    RPatternListImperial::init();

    // init object properties:
    RObject::init();
    REntity::init();
    RDocumentVariables::init();

    RArcEntity::init();
    RBlockReferenceEntity::init();
    RCircleEntity::init();
    RDimensionEntity::init();
    RDimLinearEntity::init();
    RDimAlignedEntity::init();
    RDimAngularEntity::init();
    RDimAngular2LEntity::init();
    RDimAngular3PEntity::init();
    RDimArcLengthEntity::init();
    RDimDiametricEntity::init();
    RDimOrdinateEntity::init();
    RDimRadialEntity::init();
    RDimRotatedEntity::init();
    REllipseEntity::init();
    RImageEntity::init();
    RHatchEntity::init();
    RLeaderEntity::init();
    RLineEntity::init();
    RPointEntity::init();
    RPolylineEntity::init();
    RSolidEntity::init();
    RTraceEntity::init();
    RFaceEntity::init();
    RSplineEntity::init();
    RXLineEntity::init();
    RRayEntity::init();
    RViewportEntity::init();

    RTextBasedEntity::init();
    RTextEntity::init();
    RAttributeDefinitionEntity::init();
    RAttributeEntity::init();

    RUcs::init();
    RLayer::init();
    RLayerState::init();
    RLayout::init();
    RLinetype::init();
    RBlock::init();
    RView::init();
    // load plugins (DWG support, etc.):
    RPluginLoader::loadPlugins(true);

    RLinetypeListMetric::init();
    RLinetypeListImperial::init();
    // show main window:
    MainWindow* window = new MainWindow();
    window->show();

    // exec:
    int ret = app->exec();

    // uninit:
    RPluginLoader::unloadPlugins();

    RSettings::uninit();
    RFontList::uninit();
    RPatternListMetric::uninit();
    RPatternListImperial::uninit();
    RSingleton::cleanUp();
    RMath::uninit();

    RDocumentInterface::deleteClipboard();

    RDebug::printCounters();

    return ret;
}

原文链接:https://blog.csdn.net/mrbaolong/article/details/111907798