Qt-事件处理-鼠标事件

根据书中的内容，简单的实现鼠标相关的内容

源代码如下

  

   

    

     

    
    

     

      .h
     
    
   

    

     

    
    

     

      #ifndef MOUSEEVENT_H
     
    
   

    

     

    
    

     

      #define MOUSEEVENT_H
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #include <QMainWindow>
     
    
   

    

     

    
    

     

      #include <QLabel>
     
    
   

    

     

    
    

     

      #include <QStatusBar>
     
    
   

    

     

    
    

     

      #include <QMouseEvent>
     
    
   

    

     

    
    

     

      class MouseEvent : public QMainWindow
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          Q_OBJECT
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      public:
     
    
   

    

     

    
    

     
    MouseEvent(QWidget *parent = 0);
     
    
   

    

     

    
    

     

          ~MouseEvent();
     
    
   

    

     

    
    

     

      protected:
     
    
   

    

     

    
    

     
    void mousePressEvent(QMouseEvent *e);
     
    
   

    

     

    
    

     
    void mouseMoveEvent(QMouseEvent *e);
     
    
   

    

     

    
    

     
    void mouseReleaseEvent(QMouseEvent *e);
     
    
   

    

     

    
    

     
    void mouseDoubleClickEvent(QMouseEvent *e);
     
    
   

    

     

    
    

     

      private:
     
    
   

    

     

    
    

     

          QLabel *statusLabel;
     
    
   

    

     

    
    

     

          QLabel *MousePosLabel;
     
    
   

    

     

    
    

     

      };
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #endif // MOUSEEVENT_H
     
    
  
 

  

   

    

     

    
    

     

      .cpp
     
    
   

    

     

    
    

     

      #include "mouseevent.h"
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      MouseEvent::MouseEvent(QWidget *parent)
     
    
   

    

     

    
    

     

          : QMainWindow(parent)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    setWindowTitle(tr("鼠标事件"));
     
    
   

    

     

    
    

     

          statusLabel = new QLabel;
     
    
   

    

     

    
    

     

          statusLabel->setText(tr("当前位置"));
     
    
   

    

     

    
    

     

          statusLabel->setFixedWidth(100);
     
    
   

    

     

    
    

     

          MousePosLabel = new QLabel;
     
    
   

    

     

    
    

     

          MousePosLabel->setText(tr(""));
     
    
   

    

     

    
    

     

          MousePosLabel->setFixedWidth(100);
     
    
   

    

     

    
    

     
    statusBar()->addPermanentWidget(statusLabel);
     
    
   

    

     

    
    

     
    statusBar()->addPermanentWidget(MousePosLabel);
     
    
   

    

     

    
    

     
    this->setMouseTracking(true);
     
    
   

    

     

    
    

     
    resize(400,200);
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MouseEvent::mousePressEvent(QMouseEvent *e)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          QString str="("+QString::number(e->x())+","+QString::number(e->y()) +")";
     
    
   

    

     

    
    

     
    if(e->button()==Qt::LeftButton)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        statusBar()->showMessage(tr("左键")+str);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    else if(e->button()==Qt::RightButton)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        statusBar()->showMessage(tr("右键")+str);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    else if(e->button()==Qt::MidButton)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        statusBar()->showMessage(tr("中键")+str);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MouseEvent::mouseMoveEvent(QMouseEvent *e)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          MousePosLabel->setText("("+QString::number(e->x())+","+QString::number(e->y())+")");
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MouseEvent::mouseReleaseEvent(QMouseEvent *e)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          QString str="("+QString::number(e->x())+","+QString::number(e->y()) +")";
     
    
   

    

     

    
    

     
    statusBar()->showMessage(tr("释放在：")+str,3000);
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MouseEvent::mouseDoubleClickEvent(QMouseEvent *e){}
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      MouseEvent::~MouseEvent()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
  
 

工程代码：https://gitee.com/DreamLife-Technology_DreamLife/MouseEvent

文章来源: dreamlife.blog.csdn.net，作者：DreamLife.，版权归原作者所有，如需转载，请联系作者。

原文链接：dreamlife.blog.csdn.net/article/details/79417705