QT绘制类似手机信号强度图标的实现源码

#ifndef SIGNALS_H
#define SIGNALS_H

#include <QPixmap>
#include <QColor>
//显示信号强度的图标
//模拟类似手机的信号强度图标的绘制,比较简单，欢迎参考
//程序编程人员:Jason's.Alex QQ:531401335   
//QT社区群:167304303  
//日期:2012/2/10  
class Signals : public QPixmap
{
public:
    explicit Signals();
    QPixmap GetPixmap(const int ping);
private:
    QColor GetColor(const int ping);//获取颜色
    int GetLineNum(const int ping);//获取线条数量
    QPixmap GetSignalPixmap(const QColor &color,const int lineNum);//获取信号位图
};

#endif // SIGNALS_H


#include "signals.h"
#include <QPainter>
//显示信号强度的图标
//模拟类似手机的信号强度图标的绘制,比较简单，欢迎参考
//程序编程人员:Jason's.Alex QQ:531401335   
//QT社区群:167304303  
//日期:2012/2/10 
Signals::Signals()

{

}

QPixmap Signals::GetPixmap(const int ping)
{
    return GetSignalPixmap(GetColor(ping),GetLineNum(ping));
}

QColor Signals::GetColor(const int ping )//获取颜色
{
    if(ping<=10)
        return QColor(0x6a,0x6a,0xff);
    else if(ping<=20)
        return QColor(0x28,0x94,0xff);
    else if(ping<=30)
           return QColor(0x00,0xff,0xff);
    else if(ping<=40)
        return QColor(0x9a,0xff,0x02);
    else if(ping<=50)
        return QColor(0xe1,0xe1,0x00);
    else if(ping<=60)
        return QColor(0xea,0xc1,0x00);
    else if(ping<=70)
        return QColor(0xe8,0x00,0xe8);
    else if(ping<=80)
        return QColor(0xff,0x00,0x80);
    else
        return QColor(0xea,0x00,0x00);
}

int Signals::GetLineNum(const int ping)//获取线条数量
{
    if(ping<=20)
        return 5;
    else if(ping<=40)
        return 4;
    else if(ping<=60)
        return 3;
    else if(ping<=80)
        return 2;
    else
        return 1;
}

QPixmap Signals::GetSignalPixmap(const QColor &color,const int linenum)//获取信号位图
{
    QPixmap pixmap(20,30);
    pixmap.fill(QColor(255,255,255,0));
    QPainter painter(&pixmap);
    painter.setPen(QPen(color,3));

    for(int i=1,xpos=0;i<=linenum;++i,++xpos)
    {
        painter.drawLine(xpos*4,30,xpos*4,33-(i*6));
    }
    return pixmap;
}