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50
51#include <QtMath>
52#include <QtWidgets>
53
54#include "mouse.h"
55
56static constexpr int MouseCount = 7;
57
58//! [0]
59int main(int argc, char **argv)
60{
61 QApplication app(argc, argv);
62//! [0]
63
64//! [1]
65 QGraphicsScene scene;
66 scene.setSceneRect(-300, -300, 600, 600);
67//! [1] //! [2]
68 scene.setItemIndexMethod(QGraphicsScene::NoIndex);
69//! [2]
70
71//! [3]
72 for (int i = 0; i < MouseCount; ++i) {
73 Mouse *mouse = new Mouse;
74 mouse->setPos(::sin((i * 6.28) / MouseCount) * 200,
75 ::cos((i * 6.28) / MouseCount) * 200);
76 scene.addItem(mouse);
77 }
78//! [3]
79
80//! [4]
81 QGraphicsView view(&scene);
82 view.setRenderHint(QPainter::Antialiasing);
83 view.setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
84//! [4] //! [5]
85 view.setCacheMode(QGraphicsView::CacheBackground);
86 view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
87 view.setDragMode(QGraphicsView::ScrollHandDrag);
88//! [5] //! [6]
89 view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice"));
90 view.resize(400, 300);
91 view.show();
92
93 QTimer timer;
94 QObject::connect(&timer, &QTimer::timeout, &scene, &QGraphicsScene::advance);
95 timer.start(1000 / 33);
96
97 return app.exec();
98}
99//! [6]
100