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| #include <QtCore>
#include <QtGui>
class Tile:public QGraphicsItem{//représente un item de 128*128
public:
Tile(QGraphicsItem* parent=0):QGraphicsItem(parent)
{
pix.load(":/images/timer.png");//load une image de 128*128
//setCacheMode(QGraphicsItem::ItemCoordinateCache, QSize(128,128));//utilisation du cache, voire plus bas
}
void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0 )
{
painter->drawPixmap(pos(),pix);
//painter->drawEllipse(boundingRect()); //dessiner un cercle à la place du pixmap pour voir que ça fonctionne
}
QRectF boundingRect () const
{
return QRectF(0,0,128,128);
}
QPixmap pix;
};
class Scene: public QGraphicsScene{
public:
Scene(qreal a=-1280 ,qreal b=-1280,qreal c=2560 ,qreal d=2560):QGraphicsScene( a , b, c , d)
{
for(int x=-1280;x<1280;x+=128)
for(int y=-1280;y<1280;y+=128)
{
Tile* tile = new Tile();
tile->setPos(QPointF(x,y));
addItem(tile);
}
}
};
class View: public QGraphicsView
{
public:
View():QGraphicsView()
{
setRenderHint(QPainter::Antialiasing, false);
setDragMode(QGraphicsView::RubberBandDrag);
setOptimizationFlags(QGraphicsView::DontSavePainterState);
setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
this->setScene(&scene);
}
Scene scene;
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Q_INIT_RESOURCE(perso);
View view;
view.show();
return app.exec();
} |
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