www.pudn.com > 1223456.rar > GradientProgressCtrl.cpp

// GradientProgressCtrl.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "GradientProgressCtrl.h" 
#include "MemDC.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CGradientProgressCtrl 
 
CGradientProgressCtrl::CGradientProgressCtrl() 
{ 
	m_nLower=0; 
	m_nUpper=100; 
	m_nCurrentPosition=0; 
	m_nStep=1; 
 
	//Initial Color of show 
	m_clrStart=	COLORREF(RGB(255,0,0)); 
	m_clrEnd=	COLORREF(RGB(0,0,255)); 
	m_clrBkGround=::GetSysColor(COLOR_3DFACE); 
	m_clrText=COLORREF(RGB(255,255,255)); 
	//Not show Word 
	m_bShowPercent=FALSE; 
	m_bIsShowText=0; 
} 
 
CGradientProgressCtrl::~CGradientProgressCtrl() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CGradientProgressCtrl, CProgressCtrl) 
	//{{AFX_MSG_MAP(CGradientProgressCtrl) 
	ON_WM_ERASEBKGND() 
	ON_WM_PAINT() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CGradientProgressCtrl message handlers 
 
void CGradientProgressCtrl::SetRange(int nLower,int nUpper) 
{ 
	//This Function is to Set Range of the progress  
	m_nLower=nLower; 
	m_nUpper=nUpper; 
	m_nCurrentPosition=nLower; 
	 
	CProgressCtrl::SetRange(nLower,nUpper); 
} 
 
int CGradientProgressCtrl::SetStep(int nStep) 
{ 
	m_nStep=nStep; 
 
	return CProgressCtrl::SetStep(nStep); 
} 
 
BOOL CGradientProgressCtrl::OnEraseBkgnd(CDC* pDC)  
{ 
	// TODO: Add your message handler code here and/or call default 
	 
	return TRUE;//CProgressCtrl::OnEraseBkgnd(pDC); 
} 
 
void CGradientProgressCtrl::DrawGradient(CPaintDC *pDC, const RECT &rectClient, const int &nMaxWidth) 
{ 
	RECT	rectFill;		//显示区域 
	float	fStep;			//每一步的幅宽 
	CBrush	brush;			//显示的颜色画刷 
	CMemDC	memDC(pDC);	 
 
	int		r,g,b; 
	float	rStep,gStep,bStep; 
	//得到不同颜色并相减，返回颜色之间的最大差值 
	r=(GetRValue(m_clrEnd)-GetRValue(m_clrStart)); 
	g=(GetGValue(m_clrEnd)-GetGValue(m_clrStart)); 
	b=(GetBValue(m_clrEnd)-GetBValue(m_clrStart)); 
	//使进程条显示的总数 等于最大的颜色差值 
	int		nSteps=max(abs(r),max(abs(g),abs(b))); 
	//确定每一颜色填充多大的矩形区域 
	fStep=(float)rectClient.right/(float)nSteps; 
	//设置每一颜色填充的步数 
	rStep=r/(float)nSteps; 
	gStep=g/(float)nSteps; 
	bStep=b/(float)nSteps; 
 
	r=GetRValue(m_clrStart); 
	g=GetGValue(m_clrStart); 
	b=GetBValue(m_clrStart); 
	//绘制颜色渐变的进程条 
	for(int iOnBand=0;iOnBandnMaxWidth) 
		{ 
			::SetRect(&rectFill,rectFill.right,0,rectClient.right,rectClient.bottom); 
			VERIFY(brush.CreateSolidBrush(m_clrBkGround)); 
			memDC.FillRect(&rectFill,&brush); 
			VERIFY(brush.DeleteObject()); 
			return; 
		} 
	} 
} 
 
 
void CGradientProgressCtrl::OnPaint()  
{ 
	CPaintDC dc(this); // device context for painting 
	 
	// TODO: Add your message handler code here 
	if(m_nCurrentPosition<=m_nLower || m_nCurrentPosition>=m_nUpper) 
	{ 
		CRect rect; 
		GetClientRect(rect); 
		CBrush brush; 
		brush.CreateSolidBrush(::GetSysColor(COLOR_3DFACE)); 
		dc.FillRect(&rect,&brush); 
		VERIFY(brush.DeleteObject()); 
		return; 
	} 
	CRect rectClient; 
	GetClientRect(rectClient); 
	float maxWidth((float)m_nCurrentPosition/(float)m_nUpper*(float)rectClient.right); 
	//绘制 
	DrawGradient(&dc,rectClient,(int)maxWidth); 
 
	//显示进程条进度文字 
	if(m_bShowPercent) 
	{ 
		CString percent; 
		percent.Format("%d%%",(int)(100*(float)m_nCurrentPosition/m_nUpper)); 
		dc.SetTextColor(m_clrText); 
		dc.SetBkMode(TRANSPARENT); 
		dc.DrawText(percent,&rectClient,DT_VCENTER|DT_CENTER|DT_SINGLELINE); 
	} 
 
	//显示其他文字 
	if(m_bIsShowText) 
	{ 
		dc.SetTextColor(m_clrText); 
		dc.SetBkMode(TRANSPARENT); 
		dc.DrawText(m_strShow,&rectClient,DT_VCENTER|DT_CENTER|DT_SINGLELINE); 
	} 
 
	// Do not call CProgressCtrl::OnPaint() for painting messages 
} 
 
int CGradientProgressCtrl::SetPos(int nPos) 
{ 
	//Set the Position of the Progress 
	m_nCurrentPosition=nPos; 
	return (CProgressCtrl::SetPos(nPos)); 
} 
 
int CGradientProgressCtrl::StepIt() 
{ 
	m_nCurrentPosition+=m_nStep; 
 
	return CProgressCtrl::StepIt(); 
}