Qt-LCD电子时钟

先上效果图吧

就是这个样子，简单的时间显示时间。

这里需要注意的是，我们最好建立一个空文件，这里我们需要建立一个集成QLCDNumber的类

具体方法如下图

一下是源代码

digiclock.h

  

   

    

     

    
    

     

      #ifndef DIGICLOCK_H
     
    
   

    

     

    
    

     

      #define DIGICLOCK_H
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #include <QObject>
     
    
   

    

     

    
    

     

      #include <QLCDNumber>
     
    
   

    

     

    
    

     

      class DigiClock : public QLCDNumber
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          Q_OBJECT
     
    
   

    

     

    
    

     

      public:
     
    
   

    

     

    
    

     
    DigiClock(QWidget *parent = 0);
     
    
   

    

     

    
    

     
    void mousePressEvent(QMouseEvent *event);
     
    
   

    

     

    
    

     
    void mouseMoveEvent(QMouseEvent *event);
     
    
   

    

     

    
    

     

      private slots:
     
    
   

    

     

    
    

     
    void showTime();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      private:
     
    
   

    

     

    
    

     

          QPoint dragPosition;
     
    
   

    

     

    
    

     
    bool showColon;
     
    
   

    

     

    
    

     

      };
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #endif // DIGICLOCK_H
     
    
  
 

digiclock.cpp

  

   

    

     

    
    

     

      #include "digiclock.h"
     
    
   

    

     

    
    

     

      #include <QTime>
     
    
   

    

     

    
    

     

      #include <QTimer>
     
    
   

    

     

    
    

     

      #include <QMouseEvent>
     
    
   

    

     

    
    

     

      #include <QString>
     
    
   

    

     

    
    

     

      DigiClock::DigiClock(QWidget *parent) : QLCDNumber(parent)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          QPalette p = palette();
     
    
   

    

     

    
    

     

          p.setColor(QPalette::Window,Qt::blue);
     
    
   

    

     

    
    

     
    setPalette(p);
     
    
   

    

     

    
    

     
    setWindowFlags(Qt::FramelessWindowHint);
     
    
   

    

     

    
    

     
    setWindowOpacity(0.5);
     
    
   

    

     

    
    

     

          QTimer *timer = new QTimer(this);
     
    
   

    

     

    
    

     
    connect(timer,SIGNAL(timeout()),this,SLOT(showTime()));
     
    
   

    

     

    
    

     

          timer->start(1000);
     
    
   

    

     

    
    

     
    showTime();
     
    
   

    

     

    
    

     
    resize(150,60);
     
    
   

    

     

    
    

     

          showColon = true;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void DigiClock::mousePressEvent(QMouseEvent *event)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

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

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              dragPosition = event->globalPos()-frameGeometry().topLeft();
     
    
   

    

     

    
    

     

              event->accept();
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    if(event->button() == Qt::RightButton)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        close();
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void DigiClock::mouseMoveEvent(QMouseEvent *event)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    if(event->buttons() & Qt::LeftButton)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        move(event->globalPos() - dragPosition);
     
    
   

    

     

    
    

     

              event->accept();
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void DigiClock::showTime()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          QTime time = QTime::currentTime();
     
    
   

    

     

    
    

     

          QString text = time.toString("hh:mm");
     
    
   

    

     

    
    

     
    if(showColon)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              text[2] = ':';
     
    
   

    

     

    
    

     

              showColon = false;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    else
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              text[2] = ' ';
     
    
   

    

     

    
    

     

              showColon = true;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    display(text);
     
    
   

    

     

    
    

     

      }
     
    
  
 

工程目录：https://gitee.com/DreamLife-Technology_DreamLife/LCDClock

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/79381784