voidMainWindow::mousePressEvent(QMouseEvent*event){ui->label_mouse_position->move(event->pos());//鼠标点击哪里,label就在哪里显示autopos=event->pos();//获得鼠标点击的位置QStringtext=QString("mouse postion (%1, %2)").arg(pos.x()).arg(pos.y());//生成文本内容ui->label_mouse_positio...
void MyWidget::mouseMoveEvent(QMouseEvent *event) { QPoint currentPosition = event->pos(); QPoint previousPosition = event->oldPos(); // 计算鼠标移动的方向 int deltaX = currentPosition.x() - previousPosition.x(); int deltaY = currentPosition.y() - previousPosition.y(); if (deltaX >...
2、QPoint QMouseEvent::globalPos() 窗口坐标,这个是返回鼠标的全局坐标 const Returns the global position of the mouse cursor at the time of the event. This is important on asynchronous window systems like X11. Whenever you move your widgets around in response to mouse events,globalPos() may d...
class CustomButton : public QWidget { Q_OBJECT public: explicit CustomButton(QWidget *parent = nullptr); protected: void mousePressEvent(QMouseEvent *event) override; void mouseReleaseEvent(QMouseEvent *event) override; }; void CustomButton::mousePressEvent(QMouseEvent *event) { if (event->...
QPaintDevice是能使用QPainter类在绘图设备上绘图的类. 所有从QWidget继承而来的界面组件被称为widget组件,他们是构成GUI应用程序的窗口界面基本元素. 界面组件可以从窗口系统接收鼠标事件,键盘事件和其他事件,然后在屏幕上绘制自己. 常用的界面组件 按钮类组件 ...
(); void HeartRate_LoadPlot(); void InitPlot(); void InitForm(); void on_toolButton_src_data_clicked(); void on_toolButton_image_data_clicked(); void on_toolButton_clear_clicked(); protected: void closeEvent(QCloseEvent *event); //窗口关闭 private: Ui::Widget *ui; }; #endif //...
MouseButtonPress) //判断类型 { QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event); if (mouseEvent->button() == Qt::LeftButton) //判断左键 { int value = QStyle::sliderValueFromPosition(ui->horizontalSlider_2->minimum(), ui->horizontalSlider_2->maximum(), mouseEvent->pos()...
QTimer的工作方式是基于Qt的事件循环(Event Loop)。事件循环是Qt程序的核心,它负责处理和分发各种事件,如用户输入、窗口更新、网络通信等。QTimer就是通过在事件循环中定期触发一个特殊的定时器事件(Timer Event)来工作的。 在Qt中,我们可以创建多个QTimer对象,每个对象都可以有自己的定时间隔和信号槽连接。这些QTime...
protected:voidmousePressEvent(QGraphicsSceneMouseEvent *event)override{dragPosition = event->scenePos();// 记录场景坐标系中的位置QGraphicsRectItem::mousePressEvent(event);} voidmouseMoveEvent(QGraphicsSceneMouseEvent *event)override{QPointF delta = event->scenePos(...
80 void MainWindow::mouseMoveEvent(QMouseEvent * event) 81 { 82 if (event->buttons() & Qt::LeftButton){ //如果左键是按下的 83 if(resizeDir == nodir){ //如果鼠标不是放在边缘那么说明这是在拖动窗口 84 move(event->globalPos() - dragPosition); ...