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BSPBinary Space Partitioningitem
Qt4.2QCanvasQCanvasPorting to Graphics View
—InterViewQTableWidgetQTreeWidgetQListWidget
QGraphicsScene
QGraphicsItemQGraphicsScene::addItem()QGraphicsScene::items()QGraphicsScene::itemAt()
QGraphicsS
QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100));
QGraphicsItem *item = scene.itemAt(50, 50);
// item == rect
QGraphicsScene
QGraphicsSceneQGraphics::setSelectionArea()QGraphicsViewQGraphicsSceneQGraphics::setFocusItem()QGraphicsItem::setFocus()QGraphicsScene::focusItem()
QGraphicsSceneQGraphicsScene::render()
QGraphicsViewOpenGLQGraphicsView::setViewport()lQGLWidget
QGraphicsS
&myPopulateScene(&scene);
&QGraphicsView view(&scene);
view.show();
QGraphicsView::matrix()QGraphicsViewQGraphicsView::mapToScene()QGraphicsView::mapFromScene()
QGraphicsItemQGraphicsRectItemQGraphicsEllipseItemQGraphicsTextItemQGraphicsItemQGraphicsItem
?hover eventswheel eventscontext menu events
?GroupingQGraphicsItemGroup
QGraphicsViewlocal coordinate systemQGraphicsViewQGraphicsItem::matrix()
QGraphicsItem::contains()QGraphicsItem::boundingRect()QGraphicsItem::collidesWith()
QGraphicsItemQGRaphicsItem::shape()QGraphicsItem::collidesWith()QGRaphicsItem::shape()QGraphicsItem::collidesWith()QPainterPathQGraphicsItem::collidesWith()
The Graphics View Coordinate System
Cartesian coordinate systemXY
QPainterThe Coordinate Systemlogical coordinatedevice coordinate
Item Coordinates
QGraphicsSceneQGraphicsViewQGraphicsItem::contains()
1000101010
010101022X2X200100400
QGraphicsItem::pos()QGraphicsItemQGraphicsItem::boundingRect()
Scene Coordinates
QGraphicsItem::scenePos()QGraphicsItem::sceneBoundingRect()QGraphicsSceneQGraphicsScene::changed()
View Coordinates
viewportQGraphicsView00
Coordinate Mapping
QGraphicsView::mapToScene()QGraphicsScene::itemAt()QGraphicsItem::mapToScene()QGraphicsView::mapToScene()mapToScene()QPainterPathQGraphicsScene::items()mapped path
QGraphicsItem::mapToScene()QGraphicsItem::mapFromScene()QGraphicsItem::mapToParent()QGraphicsItem::mapFromParent ()
QGraphicsView::mapFromScene()QGraphicsView::mapToScene()
Key Featue
Zooming and rotating
QGraphicsViewQGraphicsView::setMatrix()QPainter
QGraphicsView
class View : public QGraphicsView
&public slots:
&&&& void zoomIn() { scale(1.2, 1.2); }
&&&& void zoomOut() { scale(1 / 1.2, 1 / 1.2); }
&&&& void rotateLeft() { rotate(-10); }
&&&& void rotateRight() { rotate(10); }
QToolButtonsautoRepeat
QGraphicsView
Elastic Node
QGraphicsScene::render()QGraphicsView::render()single-line
APIQPainter
QGraphicsS
&scene.addRect(QRectF(0, 0, 100, 200), Qt::black, QBrush(Qt::green));
&if (QPrintDialog(&printer).exec() == QDialog::Accepted) {
&&&& QPainter painter(&printer);
&&&& painter.setRenderHint(QPainter::Antialiasing);
&&&& scene.render(&painter);
QGraphicsScene::render()QGraphicsView::render()screenshots
QGraphicsS
&scene.addRect(QRectF(0, 0, 100, 200), Qt::black, QBrush(Qt::green));
&QPainter painter(&pixmap);
&painter.setRenderHint(QPainter::Antialiasing);
&scene.render(&painter);
&painter.end();
&pixmap.save(&scene.png&);
Qt::AspectRatioMode
Drag and Drop
QGraphicsViewQWidgetQWidgetQGraphicsSceneDragDropEvent
QDragmousePressEvent()mouseMoveEvent()
void CustomItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
& &&&QMimeData *data = new QMimeD
&&&& data-&setColor(Qt::green);
&&&& QDrag *drag = new QDrag(event-&widget());
&&&& drag-&setMimeData(data);
&&&& drag-&start();
QGraphicsItemQGraphicsScene::dragEnteEvent()QGraphicsScene
Drag and Drop
Cursors and Tooltips
QWidgetQGraphicsItemQGraphicsItem::setCursor()QGraphicsItem::setToolTip()QGraphicsItem::contains()QGraphicsView
QGraphicsView::setCursor()
Drag and Drop
QGraphicsItemAnimationQGraphicsItemAnimationQSliderQTimeLine
QObjectQGraphicsItemQObject::timeEvent()
Qt3QCanvasQGraphicsScene::advance()advanceQGraphicsItem::advance()
Drag and Drop
OpenGlOpenGL Rendering
OpenGLQGraphicsView::setViewport()QGLWidgetQGraphicsViewOpenGLOpenGLQGLFormat::sampleBuffers()
QGraphicsView view(&scene);
view.setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
Item Groups
QGraphicsItemQGraphicsItem::setHandlesChildEvents()
QGraphicsItemGroupQGraphicsItemGroupQGraphicsScene::createItemGroup()QGraphicsItemGroups
Widgets and Layouts
Qt4.4QGraphicsWidgetQWidgetQPaintDeviceQGraphicsItemQGraphicsLinearLayoutQGraphicsGridLayout
QGraphicsWidget
QGraphicsWidgetQGraphicsItemQWidgetQGraphicsItemGraphicsViewQGraphicsWidgetQRectFQPointFQGraphicsWidget0.50.50.50.5Graphics View
QWidgetQGraphicsWidgetQt::WindowQGraphicsWidgetGraphics ViewMac OS XQt::SheetQt::Drawer
QGraphicsWidget
QGraphicsLayout
QGraphicsLayoutQGraphicsWidgetAPIQLayoutQGraphicsLinearLayoutQGraphicsGridLayoutQGraphicsLayoutQGraphicsLayoutItemQGraphicsItems
Graphics ViewQLineEditQPushButtonQTabWidgetQGraphicsScene::addWidget()QGraphicsProxyWidget
QGraphicsProxyWidgetGraphics ViewtabletQComboBoxQCompleterQGraphicsProxyWidgettabQGrasphicsView
Graphics View
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