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 // CXProgressCtrl class 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 style protected: 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" // CXProgressCtrl IMPLEMENT_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 handlers BOOL 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：