16.QT鼠标

• 头文件

   #include <QMouseEvent>
   #include <QStatusBar>
   #include <QLabel>

   protected:
       //鼠标按下
       void mousePressEvent(QMouseEvent *e);
       //鼠标移动
       void mouseMoveEvent(QMouseEvent *e);
       //鼠标释放
       void mouseReleaseEvent(QMouseEvent *e);
       //鼠标双击
       void mouseDoubleClickEvent(QMouseEvent *e);

• mainwindow.cpp

   //点击
   void MainWindow::mousePressEvent(QMouseEvent *e)
   {
       if(e->button()==Qt::LeftButton)
       {
           this->setWindowTitle("left press");
       }
       else if(e->button()==Qt::RightButton)
       {
           this->setWindowTitle("right press");
       }
       else if(e->button()==Qt::MidButton)
       {
           this->setWindowTitle("mid press");
       }
   }
  
   //移动
   void MainWindow::mouseMoveEvent(QMouseEvent *e)
   {
       this->setWindowTitle(QString::number(e->x()) + "," + QString::number(e->y()) );
   }
  
   void MainWindow::mouseReleaseEvent(QMouseEvent *e)
   {
        this->setWindowTitle("Release " + QString::number(e->x()) + "," + QString::number(e->y()) );
   }
  
   void MainWindow::mouseDoubleClickEvent(QMouseEvent *e)
   {
       this->setWindowTitle("double click " + QString::number(e->x()) + "," + QString::number(e->y()) );
   }