#ifndef DIGICLOCK_H
#define DIGICLOCK_H

#include <QLCDNumber>

class DigiClock : public QLCDNumber
{
    Q_OBJECT
public:
    DigiClock(QWidget *parent=0);
    void mousePressEvent(QMouseEvent *);
    void mouseMoveEvent(QMouseEvent *);

public slots:
    void showTime();    //顯示當(dāng)前時(shí)間

private:
    QPoint dragPosition;  //保存鼠標(biāo)點(diǎn)相對(duì)電子時(shí)鐘窗體左上角的偏移量
    bool showColon;       //用于顯示時(shí)間時(shí)是否顯示:
};

#endif // DIGICLOCK_H

DigiClock::DigiClock(QWidget *parent):QLCDNumber(parent)
{
//設(shè)置時(shí)鐘背景
QPalette p=palette();//定義調(diào)色板對(duì)象
p.setColor(QPalette::Window,Qt::blue);//設(shè)置背景顏色為藍(lán)色
setPalette(p);//啟用調(diào)色板對(duì)象
setWindowFlags(Qt::FramelessWindowHint);//生成無邊界窗口
setWindowOpacity(0.5);//設(shè)置窗體透明度為0.5
QTimer *timer=new QTimer(this);//新建定時(shí)器對(duì)象
connect(timer,SIGNAL(timeout()),this,SLOT(showTime()));//連接定時(shí)器地timeout()信號(hào)與顯示時(shí)間的槽信號(hào)showTime()
timer->start(1000);//啟動(dòng)定時(shí)器(每隔1000ms啟動(dòng)一次)
showTime();//初始時(shí)間顯示
resize(150,60);//設(shè)置電子時(shí)鐘顯示的尺寸
showColon=true;//初始化

}

//槽函數(shù)showTime()
void DigiClock::showTime()
{
    QTime time=QTime::currentTime();    //獲取當(dāng)前系統(tǒng)時(shí)間
    QString text=time.toString("hh:mm");//獲取的當(dāng)前時(shí)間轉(zhuǎn)換為字符串類型
    if(showColon)                        //控制:閃爍
    {
        text[2]=':';
        showColon=false;
    }
    else
    {
        text[2]=' ';
        showColon=true;
    }
    display(text);    //顯示轉(zhuǎn)換好的字符串時(shí)間
}

//鼠標(biāo)按下事件響應(yīng)函數(shù)
void DigiClock::mousePressEvent(QMouseEvent *event)
{
    if(event->button()==Qt::LeftButton) //判斷按下鍵是否為鼠標(biāo)左鍵
    {
        //dragPosition=event->globalPos()-frameGeometry().topLeft();
        dragPosition=event->pos();//兩種方法
        //event->accept();//接收事件
    }
    if(event->button()==Qt::RightButton)    //若按下鍵為鼠標(biāo)右鍵
    {
        close();//退出
    }
}

//鼠標(biāo)移動(dòng)響應(yīng)函數(shù)
void DigiClock::mouseMoveEvent(QMouseEvent *event)
{
    if(event->buttons()&Qt::LeftButton)
    {
        move(event->globalPos()-dragPosition);
        //event->accept();//接收事件
    }
}

#include "dialog.h"
#include <QApplication>
#include"digiclock.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    DigiClock clock;
    clock.show();
//    Dialog w;
//    w.show();
    return a.exec();
}