QGraphicsScene子类忽略鼠标按下事件

问题描述

我有一个UI和QGraphicsScene子类GraphicsScene实现mousePressEvent（），但鼠标点击被忽略。

I have a UI and a QGraphicsScene subclass GraphicsScene that implements mousePressEvent(), however mouse clicks are being ignored.

ui->setupUi(this);
scene = new GraphicsScene(this);
scene->addPixmap(QPixmap::fromImage(someImage));
ui->graphicsView->setScene(scene);
connect(scene, SIGNAL(clicked(QPoint)), this, SLOT(someSlot(QPoint)));

GraphicsScene :: mousePressEvent（）未被调用，因此不会发出clicked是否需要设置其他设置才能启用此功能？

GraphicsScene::mousePressEvent() is not called, and so does not emit signal clicked(). Is there something else I need to set to enable this?

更新：

void GraphicsView::mousePressEvent(QMouseEvent *event) {
        emit clicked(event->pos());
}

它已连接到正确签名的插槽。

It's connected to a slot of the right signature.

推荐答案

mos关于函数签名是正确的。函数应该是：

mos was right about the function signature. The function should have been:

void GraphicsView::mousePressEvent(QGraphicsSceneMouseEvent *event) {
        emit clicked(event->pos());
}

而不是

void GraphicsView::mousePressEvent(QMouseEvent *event) {
        emit clicked(event->pos());
}

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