进度条(CProgressCtrl)自绘

1. 关键函数：GetRange（获取进度条范围）、GetPos（获取当前位置）。
2. CProgresCtrl自绘比较简单，只要重写OnPaint。
3. 代码：

   //CMyProgressCtrl头文件
   
   #pragma once
   
   
   
   // CMyProgressCtrl
   
   class CMyProgressCtrl : public CProgressCtrl
   
   {
   
   	DECLARE_DYNAMIC(CMyProgressCtrl)
   
   
   
   public:
   
   	CMyProgressCtrl();
   
   	virtual ~CMyProgressCtrl();
   
   	typedef enum _ALIGN_TEXT_
   
   	{
   
   		ALIGN_LEFT = 0x00,
   
   		ALIGN_CENTER,
   
   		ALIGN_RIGHT
   
   	}ALIGN_TEXT;
   
   
   
   protected:
   
   	DECLARE_MESSAGE_MAP()
   
   private:
   
   	COLORREF m_clrBarFgColor;//进度条前景色
   
   	COLORREF m_clrBarBkColor;//进度条背景色
   
   	COLORREF m_clrTextFgColor;//文本前景色
   
   	COLORREF m_clrTextBkColor;//文本背景色
   
   	ALIGN_TEXT m_AlignText;//文本对齐方式
   
   	BOOL m_bShowPercent;//是否显示百分比
   
   	CFont m_font;//文本字体
   
   public:
   
   	afx_msg void OnPaint();
   
   
   
   	inline void SetBarFgColor(COLORREF clr) {m_clrBarFgColor = clr;}
   
   	inline void SetBarBkColor(COLORREF clr) {m_clrBarBkColor = clr;}
   
   	inline void SetTextFgColor(COLORREF clr) {m_clrTextFgColor = clr;}
   
   	inline void SetTextBkColor(COLORREF clr) {m_clrTextBkColor = clr;}
   
   	inline void SetAlignText(ALIGN_TEXT AlignText) {m_AlignText = AlignText;}
   
   	inline void ShowPercent(BOOL bShowPercent = TRUE) {m_bShowPercent = bShowPercent;}
   
   	inline COLORREF GetBarFgColor() {return m_clrBarFgColor;}
   
   	inline COLORREF GetBarBkColor() {return m_clrBarBkColor;}
   
   	inline COLORREF GetTextFgColor() {return m_clrTextFgColor;}
   
   	inline COLORREF GetTextBkColor() {return m_clrTextBkColor;}
   
   	inline ALIGN_TEXT GetAlignText() {return m_AlignText;}
   
   	inline BOOL IsShowPercent(){return m_bShowPercent;}
   
   //	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
   
   };
   
   

   // MyProgressCtrl.cpp : implementation file
   
   //
   
   #include "stdafx.h"
   
   #include "Progress_0100.h"
   
   #include "MyProgressCtrl.h"
   
   
   
   // CMyProgressCtrl
   
   IMPLEMENT_DYNAMIC(CMyProgressCtrl, CProgressCtrl)
   
   
   
   CMyProgressCtrl::CMyProgressCtrl() : m_clrBarFgColor(RGB(128, 128, 255)),
   
   				m_clrBarBkColor(RGB(235, 235, 235)),
   
   				m_clrTextFgColor(RGB(0, 0, 0)),
   
   				m_clrTextBkColor(RGB(255, 255, 255)),
   
   				m_AlignText(ALIGN_CENTER),
   
   				m_bShowPercent(TRUE)
   
   {
   
   }
   
   
   
   CMyProgressCtrl::~CMyProgressCtrl()
   
   {
   
   	if(m_font.GetSafeHandle())
   
   	{
   
   		m_font.DeleteObject();
   
   	}
   
   }
   
   
   
   BEGIN_MESSAGE_MAP(CMyProgressCtrl, CProgressCtrl)
   
   	ON_WM_PAINT()
   
   //	ON_WM_ERASEBKGND()
   
   END_MESSAGE_MAP()
   
   
   
   // CMyProgressCtrl message handlers
   
   void CMyProgressCtrl::OnPaint()
   
   {
   
   	CPaintDC paintDC(this); // device context for painting
   
   	// TODO: Add your message handler code here
   
   	//进度条范围
   
   	int nMin = 0;
   
   	int nMax = 0;
   
   
   
   	GetRange(nMin, nMax);
   
   	ASSERT(nMin <= nMax);
   
   	//当前位置
   
   	int nPos = GetPos();
   
   	ASSERT(nPos >= nMin && nPos <= nMax);
   
   
   
   	DWORD dwStyle = GetStyle();
   
   	BOOL bVertical = FALSE;
   
   	if(dwStyle & PBS_VERTICAL)
   
   	{//如果竖直的
   
   		bVertical = TRUE;
   
   	}
   
   
   
   	//创建兼容dc
   
   	CDC dc;
   
   	dc.CreateCompatibleDC(&paintDC);
   
   	ASSERT(dc.GetSafeHdc());
   
   
   
   	CRect rect;//客户端区域
   
   	GetClientRect(&rect);
   
   	//创建兼容位图
   
   	CBitmap bmp;
   
   	bmp.CreateCompatibleBitmap(&paintDC, rect.Width(), rect.Height());
   
   	ASSERT(bmp.GetSafeHandle());
   
   
   
   	CBitmap * pOldBitmap = dc.SelectObject(&bmp);
   
   
   
   	CFont *pOldFont = NULL;
   
   	CWnd *pParent = GetParent();
   
   	ASSERT(pParent);
   
   	//设置文本字体
   
   	CFont *pFont = pParent->GetFont();
   
   	ASSERT(pFont);
   
   	if(bVertical)
   
   	{
   
   		if(NULL == m_font.GetSafeHandle())
   
   		{
   
   			LOGFONT lf = {0};
   
   			pFont->GetLogFont(&lf);
   
   			lf.lfEscapement = 900;
   
   			m_font.CreateFontIndirectW(&lf);
   
   		}
   
   		ASSERT(m_font.GetSafeHandle());
   
   		pOldFont = dc.SelectObject(&m_font);
   
   	}
   
   	else
   
   	{
   
   		pOldFont = dc.SelectObject(&m_font);
   
   	}
   
   
   
   	double dPercent = 1.0 * (nPos - nMin) / (nMax - nMin);
   
   	//绘制进度条外边框
   
   	dc.DrawEdge(rect, EDGE_SUNKEN, BF_RECT | BF_FLAT);
   
   	//绘制进度条内矩形
   
   	CRect rc(rect);
   
   	rc.DeflateRect(CSize(2, 2));
   
   	dc.FillSolidRect(&rc, m_clrBarBkColor);
   
   
   
   	//获取要绘制的文本
   
   	CString strText(_T(""));
   
   	GetWindowTextW(strText);
   
   	if(m_bShowPercent)
   
   	{
   
   		strText.AppendFormat(_T("完成%.lf%%"), dPercent * 100.0);
   
   	}
   
   
   
   	dc.SetBkMode(TRANSPARENT);
   
   
   
   	CPoint pt(0, 0);//绘制文本的位置
   
   	CSize size = dc.GetOutputTextExtent(strText);//字体大小
   
   	CRect rcPos(rc);//进度条已前进的范围
   
   
   
   	if(!bVertical)
   
   	{
   
   		switch(m_AlignText)
   
   		{
   
   		case ALIGN_LEFT:
   
   			pt.x = rc.left;
   
   			break;
   
   		case ALIGN_RIGHT:
   
   			pt.x = rc.right - size.cx;
   
   			break;
   
   		case ALIGN_CENTER:
   
   		default:
   
   			pt.x = rc.left + (rc.Width() - size.cx) / 2;
   
   			break;
   
   		}
   
   		pt.y = rc.top + (rc.Height() - size.cy) / 2;
   
   
   
   		rcPos.right = rcPos.left + (int)(dPercent * rcPos.Width());
   
   	}
   
   	else
   
   	{
   
   		switch(m_AlignText)
   
   		{
   
   		case ALIGN_LEFT:
   
   			pt.y = rc.bottom;
   
   			break;
   
   		case ALIGN_RIGHT:
   
   			pt.y = rc.top + size.cx;
   
   			break;
   
   		case ALIGN_CENTER:
   
   		default:
   
   			pt.y = rc.top + rc.Height() / 2 + size.cx / 2;
   
   			break;
   
   		}
   
   		pt.x = rc.left + (rc.Width() - size.cy) / 2;
   
   
   
   		rcPos.top = rcPos.bottom - (int)(dPercent * rcPos.Height());
   
   	}
   
   	//绘制进度条已前进的矩形
   
   	dc.FillSolidRect(rcPos, m_clrBarFgColor);
   
   	//绘制文本
   
   	dc.SetTextColor(m_clrTextFgColor);
   
   	dc.ExtTextOutW(pt.x, pt.y, ETO_OPAQUE, rcPos, strText, NULL);
   
   
   
   	dc.SetTextColor(m_clrTextBkColor);
   
   	dc.ExtTextOutW(pt.x, pt.y, ETO_CLIPPED, &rcPos, strText, NULL);
   
   	//真正开始绘制
   
   	paintDC.BitBlt(rect.left, rect.top, rect.Width(), rect.Height(), &dc, 0, 0, SRCCOPY);
   
   
   
   	dc.SelectObject(pOldFont);
   
   	dc.SelectObject(pOldBitmap);
   
   	bmp.DeleteObject();
   
   
   
   	dc.DeleteDC();
   
   
   
   	// Do not call CProgressCtrl::OnPaint() for painting messages
   
   }
   
   
   
   //BOOL CMyProgressCtrl::OnEraseBkgnd(CDC* pDC)
   
   //{
   
   //	// TODO: Add your message handler code here and/or call default
   
   //	return TRUE;
   
   //	return CProgressCtrl::OnEraseBkgnd(pDC);
   
   //}
   
   

4. 参考：
   http://blog.csdn.net/VisualEleven/article/details/6165007 
   http://hi.baidu.com/3582077/item/0491ea172298c858f1090e08