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50
51#include "graphicsview.h"
52#include "mouse.h"
53
54#include <QApplication>
55#include <cmath>
56
57static constexpr int MouseCount = 7;
58
59//! [0]
60int main(int argc, char **argv)
61{
62 QApplication app(argc, argv);
63//! [0]
64
65//! [1]
66 QGraphicsScene scene;
67 scene.setSceneRect(x: -300, y: -300, w: 600, h: 600);
68//! [1] //! [2]
69 scene.setItemIndexMethod(QGraphicsScene::NoIndex);
70//! [2]
71
72//! [3]
73 for (int i = 0; i < MouseCount; ++i) {
74 Mouse *mouse = new Mouse;
75 mouse->setPos(ax: ::sin(x: (i * 6.28) / MouseCount) * 200,
76 ay: ::cos(x: (i * 6.28) / MouseCount) * 200);
77 scene.addItem(item: mouse);
78 }
79//! [3]
80
81//! [4]
82 GraphicsView view(&scene);
83 view.setRenderHint(hint: QPainter::Antialiasing);
84 view.setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
85//! [4] //! [5]
86 view.setCacheMode(QGraphicsView::CacheBackground);
87 view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
88//! [5] //! [6]
89 view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice"));
90 view.showMaximized();
91
92 return app.exec();
93}
94//! [6]
95

source code of qtbase/examples/widgets/touch/pinchzoom/main.cpp