progressbar.cpp

《OpenGL游戏编程》这本书的配套源码。

//========================================================
/**
*  @file      ProgressBar.cpp
*
*  项目描述： 构造游戏引擎
*  文件描述:  进度条类
*  适用平台： Windows98/2000/NT/XP
*  
*  作者：     WWBOSS
*  电子邮件:  [e-mail]
*  创建日期： 2007-07-26	
*  修改日期： 2007-07-26
*
*/ 
//========================================================

#include "stdafx.h"
#include "ProgressBar.h"


CProgressBar::CProgressBar():pos(0.0f),border(3)
{
	BarColor=SColor(0.0f,0.0f,1.0f,0.0f);
	m_sRect=SRect(0,0,100,20);
}



/**\brief
 * 绘制进度条
 *
 * 虚函数，由其父类CWindow的draw()来调用
 */
void CProgressBar::OnDraw(void)
{
	if(pos>1.0f)pos=1.0f;
	if(pos<0.0f)pos=0.0f;

	glColor4f(BarColor.r,BarColor.g,BarColor.b,BarColor.a);
	glBegin(GL_QUADS);
		glVertex2i(m_sRect.x+border,m_sRect.y+m_sRect.height-border);
		glVertex2i(m_sRect.x+border,m_sRect.y+border);
		glVertex2i(m_sRect.x+border+(int)(pos*(m_sRect.width-2.0f*border)),m_sRect.y+border);
		glVertex2i(m_sRect.x+border+(int)(pos*(m_sRect.width-2.0f*border)),m_sRect.y+m_sRect.height-border);
	glEnd();
}


/**\brief
 * 从INI文件载入窗口数据
 */
BOOL CProgressBar::LoadIni(char* filename,char* index)
{
	CIniFile Ini(filename);
	
	m_sRect.x=Ini.ReadInt(index,"x");
	m_sRect.y=Ini.ReadInt(index,"y");
	m_sRect.width=Ini.ReadInt(index,"width");
	m_sRect.height=Ini.ReadInt(index,"height");

	//背景色
	m_sColor.r	=PERSENT(Ini.ReadInt(index,"c1r"));
	m_sColor.g	=PERSENT(Ini.ReadInt(index,"c1g"));
	m_sColor.b	=PERSENT(Ini.ReadInt(index,"c1b"));
	m_sColor.a	=PERSENT(Ini.ReadInt(index,"c1a"));
	//进度条色
	BarColor.r	=PERSENT(Ini.ReadInt(index,"c2r"));
	BarColor.g	=PERSENT(Ini.ReadInt(index,"c2g"));
	BarColor.b	=PERSENT(Ini.ReadInt(index,"c2b"));
	BarColor.a	=PERSENT(Ini.ReadInt(index,"c2a"));

	border=Ini.ReadInt(index,"border");
	pos=PERSENT(Ini.ReadInt(index,"pos"));

	return TRUE;
}