我知道如何将事件从 qgraphics 场景传递给 q 图形项目,但问题出在项目上,正在执行场景的鼠标事件。
例如在下面的代码中,当按下项目时,输出是“自定义场景被按下”
#include <QtGui>
class CustomScene : public QGraphicsScene
{
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if(itemAt(event->pos()))
QGraphicsScene::mousePressEvent((event));
else
qDebug() << "Custom scene clicked.";
}
};
class CustomItem : public QGraphicsRectItem
{
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event)
{
qDebug() << "Custom item clicked.";
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
CustomItem item;
item.setRect(20, 20, 60, 60);
CustomScene scene;
//scene().set
scene.addItem(&item);
QGraphicsView view;
view.setScene(&scene);
view.show();
return a.exec();
}