QT之不规则窗口--小埋

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = 0);
    ~Widget();
protected:
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void paintEvent(QPaintEvent *event);
private:
    QPoint dragPosition;
    QPixmap pix;
    bool flag=true;
};

#endif // WIDGET_H

#include "widget.h"
#include <QMouseEvent>
#include <QPainter>
#include <QPixmap>
#include <QBitmap>
#include <QLCDNumber>
#include <QPushButton>
#include <QTime>
#include <QTimer>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{

    pix.load(":/mm.png",0,Qt::AvoidDither | Qt::ThresholdDither | Qt::ThresholdAlphaDither);
    resize(pix.size());
    setMask(QBitmap(pix.mask()));   //为调用它的控件增加一个遮罩，遮住所选区域以外的部分，使其看起来是透明的
                                    //它的参数可以为QBitmap对象，或者一个QRegion对象，此处调用的是QPixmap的mask()函数用于获得图片自身的遮罩
                                    //为一个QBitmap对象，这里使用的是png图片，它的透明部分实际上是一个遮罩

    QLCDNumber *lcdnum=new QLCDNumber(this);
    //设置能显示的位数
    lcdnum->setDigitCount(8);
    //设置显示的模式为10进制
    lcdnum->setMode(QLCDNumber::Dec);
    //设置显示外观
    lcdnum->setSegmentStyle(QLCDNumber::Flat);
    //设置样式
    lcdnum->setStyleSheet("color:black;background-color: transparent;");

    QTime tim=QTime::currentTime();
    QString str=tim.toString("hh:mm:ss");
    lcdnum->display(str);


    QTimer *timer=new QTimer(this);
    timer->start(1000);
    connect(timer,&QTimer::timeout,[=](){
        QTime tim=QTime::currentTime();
        QString str=tim.toString("hh:mm:ss");
        str=tim.toString("hh:mm:ss");
        if(this->flag){
            this->flag=false;
        }else{
            QString a=str.mid(6);
            if(a=="00"){
                str.replace(2,1," ");
            }
            str.replace(5,1," ");
            this->flag=true;
        }
        lcdnum->display(str);
    });


    lcdnum->resize(200,80);

    lcdnum->move(this->width()*0.5-130,this->height()*0.5+50);

}

Widget::~Widget()
{

}
void Widget::mousePressEvent(QMouseEvent *event){
    if(event->button()==Qt::LeftButton){
        this->dragPosition=event->globalPos()-frameGeometry().topLeft();
        event->accept();
    }
    if(event->button()==Qt::RightButton){
        this->close();
    }
}

void Widget::mouseMoveEvent(QMouseEvent *event){
    if(event->buttons() & Qt::LeftButton){
        this->move(event->globalPos()-this->dragPosition);
        event->accept();
    }
}

void Widget::paintEvent(QPaintEvent *event){
        QPainter painterr(this);
        painterr.drawPixmap(0,0,pix);
}