colorprogress.cpp

一个完整的彩票软件的源代码

// ColorProgress.cpp : implementation file
//

#include "stdafx.h"
#include "lottery.h"
#include "ColorProgress.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CColorProgress

CColorProgress::CColorProgress()
{
	m_crStart=RGB(0,0,255);
	m_crEnd=RGB(0,0,0);
	m_pColorBuf=NULL;
}

CColorProgress::~CColorProgress()
{
	if (m_pColorBuf) delete [] m_pColorBuf;
}


BEGIN_MESSAGE_MAP(CColorProgress, CProgressCtrl)
	//{{AFX_MSG_MAP(CColorProgress)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CColorProgress message handlers

void CColorProgress::OnPaint() 
{
	if (m_pColorBuf)
	{
		CPaintDC mainDC(this); // device context for painting
		CDC dc;
		dc.CreateCompatibleDC(&mainDC);
		CRect rect;
		GetClientRect(&rect);
		CBitmap bitmap,*pOldBitmap;
		bitmap.CreateCompatibleBitmap(&mainDC,rect.Width(),rect.Height());
		pOldBitmap=(CBitmap*)dc.SelectObject(&bitmap);

		int nUpper,nLower;
		GetRange(nLower,nUpper);
		int nPos=GetPos();
		int nChunks=nUpper-nLower+1;
		int nWidth=rect.Width()/nChunks + 1;
		CRect rect1;
		rect1.top=0;
		rect1.bottom=rect.bottom;
		for (int i=0; i<nChunks; i++)
		{
			CBrush brush(m_pColorBuf[i]);
			rect1.left=(i)*nWidth;
			rect1.right=rect1.left+nWidth;
			dc.FillRect(&rect1,&brush);
			brush.DeleteObject();
		}
		mainDC.BitBlt(0,0,rect.Width(),rect.Height(),&dc,0,0,SRCCOPY);
		dc.SelectObject(pOldBitmap);
		bitmap.DeleteObject();
		dc.DeleteDC();
	}
}

void CColorProgress::Step()
{
	RotateColorBuf();
	Invalidate();
}
void CColorProgress::SetRange(short nLower,short nUpper)
{
	if (nLower > nUpper)
	{
		int temp=nLower;
		nLower=nUpper;
		nUpper=temp;
	}
	CProgressCtrl::SetRange(nLower,nUpper);
	int nChunks=nUpper-nLower+1;
	if (m_pColorBuf) delete [] m_pColorBuf;
	m_pColorBuf=new COLORREF[nChunks];
	nChunks/=2;
	for (int i=0; i<=nChunks; i++)
	{
		m_pColorBuf[i]=RGB((nChunks-i)*255/nChunks,(nChunks-i)*255/nChunks,255);
	}
	for (i=nChunks+1; i<=(nUpper-nLower); i++)
	{
		m_pColorBuf[i]=RGB((i-nChunks)*255/nChunks,(i-nChunks)*255/nChunks,255);
	}
}


void CColorProgress::RotateColorBuf()
{
	int nLower,nUpper,nChunks;
	GetRange(nLower,nUpper);
	nChunks=nUpper-nLower;
	COLORREF temp=m_pColorBuf[nChunks];
	memmove((void*)(&(m_pColorBuf[1])),(void*)(&(m_pColorBuf[0])),nChunks*sizeof(COLORREF));
	m_pColorBuf[0]=temp;
}