Implementation of Qt-LCD electronic clock and qt-LCD electronic clock

Implementation of Qt-LCD electronic clock and qt-LCD electronic clock

First.

In this way, a simple time is displayed.

Note that we 'd better create an empty file. here we need to create a class that integrates QLCDNumber.

The specific method is as follows:

Source code

Digiclock. h

#ifndef DIGICLOCK_H#define DIGICLOCK_H#include 
 
  #include 
  
   class DigiClock : public QLCDNumber{    Q_OBJECTpublic:    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 
 
  #include 
  
   #include 
   
    #include 
    
     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);}