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()) );
  }