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bool GraphicsScene::event(QEvent *event){
qDebug()<<event->type();
switch (event->type()) {
case QEvent::TouchBegin:
{
qDebug()<<"touch Begin";
return true;
}
case QEvent::TouchUpdate:
{
qDebug()<<"touch Update";
return true;
}
case QEvent::TouchEnd:
{
qDebug()<<"touch end";
return true;
}
default:
return QGraphicsScene::event(event);
}