理解event->globalPos() 事件触发点相对于桌面的位置; pos() 程序相对于桌面左上角的位置,实际是窗口的左上角坐标。 下面是通过图示更加清楚的表明上述的解释: 红点所在处即为窗口左上角的坐标pos(); 若鼠标在程序窗口中点击,则通过event->globalPos()获取鼠标在桌面坐标系统的位置。... QT 窗口拖拽移动实现(...
你想表达什么意思?这样不行么:鼠标按下时记录的p点,鼠标移动时获取的点和p进行计算,满足的就存起来子啊
QTreeView::mousePressEvent(event); }voidDragTreeView::mouseMoveEvent(QMouseEvent *event) {if(event->buttons() &Qt::LeftButton) {intdistance = (event->pos() - m_dragStartPos).manhattanLength();//计算距离intdistance2 = QLineF(event->pos(), m_dragStartPos).length();//方式2计算距离if(d...
新建一个窗口程序,然后创建一个QMenu对象。在构造函数里初始化 menu = new QMenu("menu", this); //menu在头文件声明 QAction *action = new QAction(tr("1111"), this); //为使目录较大,能看见,我们添加一个action menu->addAction(action);然后在mousePressEvent里看到效果 void Dialog...
因为希望取值可以取几个固定的值,此处限定只能取0, 0.1, 0.2… 1这些值,所以在释放时对当前值四舍五入,然后让滑块移动到相应的位置。最后发出信号传递数值。 void MySlider::mouseReleaseEvent(QMouseEvent *event) { //获取当前点击位置 int currentX = event->pos().x(); ...
keybd_event('A',(BYTE)0,0,0);//此处可以用 'A', (BYTE)65, 用'a'不起作用.keybd_event('A', (BYTE)0, KEYEVENTF_KEYUP,0); keybd_event(VK_CONTROL, (BYTE)0, KEYEVENTF_KEYUP,0); 1. 2. 3. 4. 5. 更多例子:javascript:void(0) ...
void TableWidget::contextMenuEvent(QContextMenuEvent *event) { pop_menu->clear(); //清除原有菜单 QPoint point = event->pos(); //得到窗口坐标 QTableWidgetItem *item = this->itemAt(point); if(item != NULL) { pop_menu->addAction(action_download); ...
(2)重新实现contextMenuEvent void TableWidget::contextMenuEvent(QContextMenuEvent *event) { pop_menu->clear();//清除原有菜单 QPoint point = event->pos();//得到窗口坐标 QTableWidgetItem *item = this->itemAt(point); if(item != NULL) ...
void QWGraphicsView::mouseMoveEvent(QMouseEvent *event){QPoint point=event->pos(); //QGraphicsView的坐标emit mouseMovePoint(point); //发送信号QGraphicsView::mouseMoveEvent(event);} //鼠标左键按下事件: void QWGraphicsView::mousePressEvent(QMouseEvent *event){if (event->button()==Qt::LeftBu...
QPoint point = event->pos(); point.setX(point.x() - ui->centralwidget->x()); newWidget(row, point); } void frmMain::dragEnterEvent(QDragEnterEvent *event) { if(event->mimeData()->hasFormat("application/x-qabstractitemmodeldatalist")) { ...