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50
51#include <QGraphicsEllipseItem>
52#include <QGraphicsScene>
53#include <QStyleOptionGraphicsItem>
54#include <QtGui>
55
56class CustomScene : public QGraphicsScene
57{
58public:
59 CustomScene()
60 { addItem(item: new QGraphicsEllipseItem(QRect(10, 10, 30, 30))); }
61
62 void drawItems(QPainter *painter, int numItems, QGraphicsItem *items[],
63 const QStyleOptionGraphicsItem options[],
64 QWidget *widget = 0) override;
65};
66
67//! [0]
68void CustomScene::drawItems(QPainter *painter, int numItems,
69 QGraphicsItem *items[],
70 const QStyleOptionGraphicsItem options[],
71 QWidget *widget)
72{
73 for (int i = 0; i < numItems; ++i) {
74 // Draw the item
75 painter->save();
76 painter->setTransform(transform: items[i]->sceneTransform(), combine: true);
77 items[i]->paint(painter, option: &options[i], widget);
78 painter->restore();
79 }
80}
81//! [0]
82

source code of qtbase/src/widgets/doc/snippets/graphicssceneadditem/graphicssceneadditemsnippet.cpp