QT绘制类似手机信号强度图标的实现源码

本文主要是介绍QT绘制类似手机信号强度图标的实现源码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

#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);elsereturn 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;elsereturn 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;
}