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QT 习俗改变事件和拖拉模式
原标题:QT custom mouse events and drag mode

I m 采用带有QGraphicsScene的QGraphicsView,与Qt. Im一起申请。 由于我需要增加习俗改变活动功能,我是次级的QGraphicsView。 我的问题是,当我重新履行 mo事职能时,原来的QGraphicsView功能就没有工作。

i.e. 我重新执行了一些 mo新闻和释放事件,现在我可以拖拉QGraphicsScene,尽管我已经这样做。

this->setDragMode(QGraphicsView::ScrollHandDrag);

我希望我的问题足够明确,如果我不了解什么不明确的话。

最佳回答

你们是否把基础班级的实施称为 mo花活动,而你却置之不理? 例如,

void MyGraphicsView::mousePressEvent(QMouseEvent *e)
{
    // Custom logic

    QGraphicsView::mousePressEvent(e);
}
问题回答

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