| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the documentation of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:BSD$ |
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| ****************************************************************************/ |
| #include <QGraphicsView> |
| #include <QOpenGLWidget> |
| #include <QPrinter> |
| #include <QPrintDialog> |
| #include <QStandardItem> |
| #include <QMimeData> |
| #include <QDrag> |
| #include <QGraphicsSceneMouseEvent> |
| |
| void graphicsview_snippet_main() |
| { |
| //! [0] |
| QGraphicsScene scene; |
| QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100)); |
| |
| QGraphicsItem *item = scene.itemAt(50, 50, QTransform()); |
| //! [0] |
| Q_UNUSED(rect); |
| Q_UNUSED(item); |
| } |
| |
| void myPopulateScene(QGraphicsScene *) |
| { |
| // Intentionally left empty |
| } |
| |
| void snippetThatUsesMyPopulateScene() |
| { |
| //! [1] |
| QGraphicsScene scene; |
| myPopulateScene(&scene); |
| QGraphicsView view(&scene); |
| view.show(); |
| //! [1] |
| } |
| |
| class CustomItem : public QStandardItem |
| { |
| public: |
| using QStandardItem::QStandardItem; |
| |
| int type() const override { return UserType; } |
| void mousePressEvent(QGraphicsSceneMouseEvent *event); |
| QStandardItem *clone() const override { return new CustomItem; } |
| }; |
| |
| |
| void printScene() |
| { |
| //! [3] |
| QGraphicsScene scene; |
| QPrinter printer; |
| scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); |
| |
| if (QPrintDialog(&printer).exec() == QDialog::Accepted) { |
| QPainter painter(&printer); |
| painter.setRenderHint(QPainter::Antialiasing); |
| scene.render(&painter); |
| } |
| //! [3] |
| } |
| |
| void pixmapScene() |
| { |
| //! [4] |
| QGraphicsScene scene; |
| scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); |
| |
| QPixmap pixmap; |
| QPainter painter(&pixmap); |
| painter.setRenderHint(QPainter::Antialiasing); |
| scene.render(&painter); |
| painter.end(); |
| |
| pixmap.save("scene.png"); |
| //! [4] |
| } |
| |
| //! [5] |
| void CustomItem::mousePressEvent(QGraphicsSceneMouseEvent *event) |
| { |
| QMimeData *data = new QMimeData; |
| QDrag *drag = new QDrag(event->widget()); |
| drag->setMimeData(data); |
| drag->exec(); |
| } |
| //! [5] |
| |
| void viewScene() |
| { |
| QGraphicsScene scene; |
| //! [6] |
| QGraphicsView view(&scene); |
| QOpenGLWidget *gl = new QOpenGLWidget(); |
| QSurfaceFormat format; |
| format.setSamples(4); |
| gl->setFormat(format); |
| view.setViewport(gl); |
| //! [6] |
| } |