27.Qt时钟

• myclock.h

   #ifndef MYCLOCK_H
   #define MYCLOCK_H
  
   #include <QObject>
   #include <QLCDNumber>
   #include <QWidget>
   #include <QMouseEvent>
  
   class myclock : public QLCDNumber
   {
       Q_OBJECT
   public:
       myclock(QWidget* parent=);
       void mousePressEvent(QMouseEvent *event);
       void mouseMoveEvent(QMouseEvent *event);
   private:
       QPoint pos;
  18     bool showcolon;
  
   private slots:
       void showtime();
   };
  
   #endif // MYCLOCK_H

• myclock.cpp 1 #include "myclock.h"

   #include <QTimer>
   #include <QTime>
   #include <QPalette>
  
   myclock::myclock(QWidget* parent):QLCDNumber(parent)
   {
       //设定颜色
       QPalette p = palette();
       p.setColor(QPalette::Window,Qt::blue);
       setPalette(p);
  
       //隐藏标题,关闭按钮
       setWindowFlags(Qt::FramelessWindowHint);
       //设置透明度
       setWindowOpacity(0.5);
   
  　　    //创建事件空间
       QTimer *timer = new QTimer(this);
         //与事件绑定
       connect(timer,SIGNAL(timeout()),this,SLOT(showtime()));
         //多长时间改变一次
       timer->start();
         //显示时间
       showtime();
       resize(,);
   }
  
   void myclock::mousePressEvent(QMouseEvent *event)
   {
  
   }
  
   void myclock::mouseMoveEvent(QMouseEvent *event)
   {
  
   }
  
   void myclock::showtime()
   {
  37     QTime time = QTime::currentTime();//当前时间
  38     QString str = time.toString("hh:mm:ss");//时间
  39     this->display(str);
   }