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六、Qt之鼠标拖动界面移动代码实现

witmy 2022-06-21 阅读 50

主要适用于组件无法点击时的处理

//继承事件过滤器
bool GifWidget::eventFilter(QObject *watched, QEvent *event)
{
static QPoint mousePoint;
static bool mousePressed = false;

QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
if (mouseEvent->type() == QEvent::MouseButtonPress) {
if (mouseEvent->button() == Qt::LeftButton) {
mousePressed = true;
mousePoint = mouseEvent->globalPos() - this->pos();
return true;
}
} else if (mouseEvent->type() == QEvent::MouseButtonRelease) {
mousePressed = false;
return true;
} else if (mouseEvent->type() == QEvent::MouseMove) {
if (mousePressed && (mouseEvent->buttons() && Qt::LeftButton)) {
this->move(mouseEvent->globalPos() - mousePoint);
return true;
}
}

return QWidget::eventFilter(watched, event);
}

//安装事件过滤器
this->installEventFilter(this);


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