自绘CProgressCtrl进度条控件，支持自定义显示文本和进程百分比信息

// CXProgressCtrl 头文件#pragma once// CXProgressCtrlclass CXProgressCtrl : public CProgressCtrl{DECLARE_DYNAMIC(CXProgressCtrl)public:CXProgressCtrl();virtual ~CXProgressCtrl();typedef enum _ALIGN_TEXT_{ALIGN_LEFT = 0x00,ALIGN_CENTER,ALIGN_RIGHT}ALIGN_TEXT;public:inline void SetBarColor(COLORREF clr){m_clrBarColor = clr;}inline COLORREF GetBarColor(){return m_clrBarColor;}inline void SetBarBkColor(COLORREF clr){m_clrBarBkColor = clr;}inline COLORREF GetBarBkColor(){return m_clrBarBkColor;}inline void SetTextColor(COLORREF clr){m_clrTextColor = clr;}inline COLORREF GetTextColor(){return m_clrTextColor;}inline void SetTextBkColor(COLORREF clr){m_clrTextBkColor = clr;}inline COLORREF GetTextBkColor(){return m_clrTextBkColor;}inline void SetTextAlign(ALIGN_TEXT AlignText){m_AlignText = AlignText;}inline ALIGN_TEXT GetTextAlign(){return m_AlignText;}inline void ShowPercent(BOOL bShowPercent = TRUE){m_bShowPercent = bShowPercent;}inline BOOL IsShowPercent(){return m_bShowPercent;}protected:COLORREF m_clrBarColor;COLORREF m_clrBarBkColor;COLORREF m_clrTextColor;COLORREF m_clrTextBkColor;ALIGN_TEXT m_AlignText;BOOL m_bShowPercent;CFont m_font; // Only for vertical styleprotected:afx_msg BOOL OnEraseBkgnd(CDC* pDC);afx_msg void OnPaint();DECLARE_MESSAGE_MAP()};

 

// CXProgressCtrl .CPP文件// XProgressCtrl.cpp : implementation file//#include "stdafx.h"#include "Demo.h"#include "XProgressCtrl.h"// CXProgressCtrlIMPLEMENT_DYNAMIC(CXProgressCtrl, CProgressCtrl)CXProgressCtrl::CXProgressCtrl() : m_clrTextColor(RGB(0, 0, 0)),m_clrTextBkColor(RGB(255, 255, 255)),m_clrBarColor(RGB(128, 128, 255)),m_clrBarBkColor(RGB(235, 235, 235)),m_AlignText(ALIGN_CENTER), m_bShowPercent(TRUE){}CXProgressCtrl::~CXProgressCtrl(){if(m_font.GetSafeHandle()){m_font.DeleteObject();}}BEGIN_MESSAGE_MAP(CXProgressCtrl, CProgressCtrl)ON_WM_ERASEBKGND()ON_WM_PAINT()END_MESSAGE_MAP()// CXProgressCtrl message handlersBOOL CXProgressCtrl::OnEraseBkgnd(CDC *pDC){return TRUE;}void CXProgressCtrl::OnPaint(){CPaintDC paintDC(this);int nMin = 0;int nMax = 0;GetRange(nMin, nMax);ASSERT(nMin <= nMax);int nPos = GetPos();ASSERT(nPos >= nMin && nPos <= nMax);DWORD dwStyle = GetStyle();BOOL bVertical = FALSE;if(dwStyle & PBS_VERTICAL){bVertical = TRUE;}CDC dc;dc.CreateCompatibleDC(&paintDC);ASSERT(dc.GetSafeHdc());CRect rect;GetClientRect(&rect);CBitmap bmp;bmp.CreateCompatibleBitmap(&paintDC, rect.Width(), rect.Height());ASSERT(bmp.GetSafeHandle());CBitmap* pOldBitmap = (CBitmap*)dc.SelectObject(&bmp);CFont* pOldFont = NULL;CWnd* pParent = GetParent();ASSERT(pParent);CFont* pFont = pParent->GetFont();ASSERT(pFont);if(bVertical){if(NULL == m_font.GetSafeHandle()){LOGFONT lf = {0};pFont->GetLogFont(&lf);lf.lfEscapement = 900;m_font.CreateFontIndirect(&lf);}ASSERT(m_font.GetSafeHandle());pOldFont = (CFont*)dc.SelectObject(&m_font);}else{pOldFont = (CFont*)dc.SelectObject(pFont);}double dPercent = (double)(nPos - nMin) / ((double)(nMax - nMin));dc.DrawEdge(rect, EDGE_SUNKEN, BF_RECT | BF_FLAT);CRect rc(rect);rc.DeflateRect(CSize(2, 2));dc.FillSolidRect(&rc, m_clrBarBkColor);CString strText(_T(""));GetWindowText(strText);if(m_bShowPercent){strText.AppendFormat(_T("%d%% "), static_cast<int>((dPercent * 100.0) + 0.5));}dc.SetBkMode(TRANSPARENT);dc.SetTextColor(m_clrTextColor);CPoint pt(0, 0);CSize size = dc.GetOutputTextExtent(strText);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;CRect rcPos(rc);rcPos.right = rcPos.left + (int)(dPercent * rcPos.Width());dc.FillSolidRect(rcPos, m_clrBarColor);dc.SetTextColor(m_clrTextColor);dc.ExtTextOut(pt.x, pt.y, ETO_OPAQUE, rcPos, strText, NULL);dc.SetTextColor(m_clrTextBkColor);dc.ExtTextOut(pt.x, pt.y, ETO_CLIPPED, &rcPos, strText, NULL);}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.bottom - (rc.Height() - size.cx) / 2;break;}pt.x = rc.left + (rc.Width() - size.cy) / 2;CRect rcPos(rc);rcPos.top = rcPos.bottom - (int)(dPercent * rcPos.Height());dc.FillSolidRect(rcPos, m_clrBarColor);dc.SetTextColor(m_clrTextColor);dc.ExtTextOut(pt.x, pt.y, ETO_OPAQUE, rcPos, strText, NULL);dc.SetTextColor(m_clrTextBkColor);dc.ExtTextOut(pt.x, pt.y, ETO_CLIPPED, &rcPos, strText, NULL);}paintDC.BitBlt(rect.left, rect.top ,rect.Width(), rect.Height(), &dc, 0, 0, SRCCOPY);dc.SelectObject(pOldFont);dc.SelectObject(pOldBitmap);bmp.DeleteObject();dc.DeleteDC();}

 

效果图如下所示：