QT鼠标响应事件和获取鼠标位置

你的名字 2023-01-01 11:47 271阅读 0赞

//鼠标按下事件
    ```c
    void MainWindow::mousePressEvent(QMouseEvent *event)
    { 
    QString str="("+QString::number(event->x())+","+QString::number(event->y())+")";
    // ui->lineEdit->setText(tr("鼠标按下")+str);
    if(event->button()==Qt::LeftButton)
    { 
    ui->lineEdit->setText(tr("鼠标左键按下:")+str);
    }else if(event->button()==Qt::RightButton)
    { 
    ui->lineEdit->setText(tr("鼠标右键按下:")+str);
    }else if(event->button()==Qt::MidButton)
    { 
    ui->lineEdit->setText(tr("鼠标中键按下:")+str);
    }
    }

//鼠标移动事件
    void MainWindow::mouseMoveEvent(QMouseEvent *event) 
    { 
    QString str="("+QString::number(event->x())+","+QString::number(event->y())+")";
    ui->lineEdit->setText(tr("鼠标移动")+str);
    if(event->buttons()&Qt::LeftButton) 
    { 
    ui->lineEdit->setText(tr("鼠标左键按下并移动")+str);
    }else if(event->buttons()&Qt::LeftButton) 
    { 
    ui->lineEdit->setText(tr("鼠标右键按下移动")+str); 
    }else if(event->buttons()&Qt::LeftButton)
    { 
    ui->lineEdit->setText(tr("鼠标中键按下移动")+str);
    }
    }

//鼠标释放事件
    void MainWindow::mouseReleaseEvent(QMouseEvent *event)
    { 
    // ui->lineEdit->setText(tr("鼠标释放")+str);
    if(event->button()==Qt::LeftButton)
    { 
    ui->lineEdit->setText(tr("鼠标左键释放:")+str);
    }else if(event->button()==Qt::RightButton)
    { 
    ui->lineEdit->setText(tr("鼠标右键释放:")+str);
    }else if(event->button()==Qt::MidButton)
    { 
    ui->lineEdit->setText(tr("鼠标中键释放:")+str);
    }

获取鼠标的位置。
    void   MainWindow::mouseMoveEvent(QMouseEvent* event){   
    if(event->buttons() & Qt::LeftButton){ //与运算 
    QPoint temp;  
    temp = event->globalPos() - offset;// 
    move(temp);//移动到具体坐标点 
    qDebug()<<"globalPos"<<event->globalPos()<<endl;  
    qDebug()<<"pos"<<pos()<<endl; }
    }
    
    void  MainWindow::wheelEvent(QWheelEvent * event)
    {  if(event->delta() > 0)
    {  ui.textEdit->zoomIn();//放大 }
    else{   
    ui.textEdit->zoomOut();//缩小 }
    }

// 键盘按键事件
    void MainWindow::keyPressEvent(QKeyEvent *e)
    { 
        if(e->key() == Qt::Key_Z)
        { 
       //ui.label->setPixmap(QPixmap("C:/Users/sony/Desktop/pic/Lena.jpg"));
         ui->label->resize(100, 100);
        }
    }