VC 带有文字百分比的进度条

//以下是CPP文件 // TextProgressCtrl.cpp : implementation file // // Written by Chris Maunder (chrismaunder@codeguru.com) // Copyright 1998. // // Modified : 26/05/98 Jeremy Davis, jmd@jvf.co.uk // Added colour routines // // TextProgressCtrl is a drop-in replacement for the standard // CProgressCtrl that displays text in a progress control. // // This code may be used in compiled form in any way you desire. This // file may be redistributed by any means PROVIDING it is not sold for // profit without the authors written consent, and providing that this // notice and the authors name is included. If the source code in // this file is used in any commercial application then an email to // the me would be nice. // // This file is provided "as is" with no expressed or implied warranty. // The author accepts no liability if it causes any damage to your // computer, causes your pet cat to fall ill, increases baldness or // makes you car start emitting strange noises when you start it up. // // Expect bugs. // // Please use and enjoy. Please let me know of any bugs/mods/improvements // that you have found/implemented and I will fix/incorporate them into this // file. #include "stdafx.h" #include "TextProgressCtrl.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif #ifndef _MEMDC_H_ ////////////////////////////////////////////////// // CMemDC - memory DC // // Author: Keith Rule // Email: keithr@europa.com // Copyright 1996-1997, Keith Rule // // You may freely use or modify this code provided this // Copyright is included in all derived versions. // // History - 10/3/97 Fixed scrolling bug. // Added print support. // // This class implements a memory Device Context class CMemDC : public CDC { public: // constructor sets up the memory DC CMemDC(CDC* pDC) : CDC() { ASSERT(pDC != NULL); m_pDC = pDC; m_pOldBitmap = NULL; m_bMemDC = !pDC->IsPrinting(); if (m_bMemDC) // Create a Memory DC { pDC->GetClipBox(&m_rect); CreateCompatibleDC(pDC); m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height()); m_pOldBitmap = SelectObject(&m_bitmap); SetWindowOrg(m_rect.left, m_rect.top); } else // Make a copy of the relevent parts of the current DC for printing { m_bPrinting = pDC->m_bPrinting; m_hDC = pDC->m_hDC; m_hAttribDC = pDC->m_hAttribDC; } } // Destructor copies the contents of the mem DC to the original DC ~CMemDC() { if (m_bMemDC) { // Copy the offscreen bitmap onto the screen. m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(), this, m_rect.left, m_rect.top, SRCCOPY); //Swap back the original bitmap. SelectObject(m_pOldBitmap); } else { // All we need to do is replace the DC with an illegal value, // this keeps us from accidently deleting the handles associated with // the CDC that was passed to the constructor. m_hDC = m_hAttribDC = NULL; } } // Allow usage as a pointer CMemDC* operator->() {return this;} // Allow usage as a pointer operator CMemDC*() {return this;} private: CBitmap m_bitmap; // Offscreen bitmap CBitmap* m_pOldBitmap; // bitmap originally found in CMemDC CDC* m_pDC; // Saves CDC passed in constructor CRect m_rect; // Rectangle of drawing area. BOOL m_bMemDC; // TRUE if CDC really is a Memory DC. }; #endif ///////////////////////////////////////////////////////////////////////////// // CTextProgressCtrl CTextProgressCtrl::CTextProgressCtrl() { m_nPos = 0; m_nStepSize = 1; m_nMax = 100; m_nMin = 0; m_bShowText = TRUE; m_strText.Empty(); m_colFore = ::GetSysColor(COLOR_HIGHLIGHT); m_colBk = ::GetSysColor(COLOR_WINDOW); m_colTextFore = ::GetSysColor(COLOR_HIGHLIGHT); m_colTextBk = ::GetSysColor(COLOR_WINDOW); m_nBarWidth = -1; } CTextProgressCtrl::~CTextProgressCtrl() { } BEGIN_MESSAGE_MAP(CTextProgressCtrl, CProgressCtrl) //{{AFX_MSG_MAP(CTextProgressCtrl) ON_WM_ERASEBKGND() ON_WM_PAINT() ON_WM_SIZE() //}}AFX_MSG_MAP ON_MESSAGE(WM_SETTEXT, OnSetText) ON_MESSAGE(WM_GETTEXT, OnGetText) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CTextProgressCtrl message handlers LRESULT CTextProgressCtrl::OnSetText(UINT, LPCTSTR szText) { LRESULT result = Default(); if ( (!szText && m_strText.GetLength()) || (szText && (m_strText != szText)) ) { m_strText = szText; Invalidate(); } return result; } LRESULT CTextProgressCtrl::OnGetText(UINT cchTextMax, LPTSTR szText) { if (!_tcsncpy(szText, m_strText, cchTextMax)) return 0; else return min(cchTextMax, (UINT) m_strText.GetLength()); } BOOL CTextProgressCtrl::OnEraseBkgnd(CDC* /*pDC*/) { return TRUE; } void CTextProgressCtrl::OnSize(UINT nType, int cx, int cy) { CProgressCtrl::OnSize(nType, cx, cy); m_nBarWidth = -1; // Force update if SetPos called } void CTextProgressCtrl::OnPaint() { if (m_nMin >= m_nMax) return; CRect LeftRect, RightRect, ClientRect; GetClientRect(ClientRect); double Fraction = (double)(m_nPos - m_nMin) / ((double)(m_nMax - m_nMin)); CPaintDC PaintDC(this); // device context for painting CMemDC dc(&PaintDC); //CPaintDC dc(this); // device context for painting (if not double buffering) LeftRect = RightRect = ClientRect; LeftRect.right = LeftRect.left + (int)((LeftRect.right - LeftRect.left)*Fraction); dc.FillSolidRect(LeftRect, m_colFore); RightRect.left = LeftRect.right; dc.FillSolidRect(RightRect, m_colBk); if (m_bShowText) { CString str; if (m_strText.GetLength()) str = m_strText; else str.Format("%d%%", (int)(Fraction*100.0)); dc.SetBkMode(TRANSPARENT); CRgn rgn; rgn.CreateRectRgn(LeftRect.left, LeftRect.top, LeftRect.right, LeftRect.bottom); dc.SelectClipRgn(&rgn); dc.SetTextColor(m_colTextBk); dc.DrawText(str, ClientRect, DT_CENTER | DT_VCENTER | DT_SINGLELINE); rgn.DeleteObject(); rgn.CreateRectRgn(RightRect.left, RightRect.top, RightRect.right, RightRect.bottom); dc.SelectClipRgn(&rgn); dc.SetTextColor(m_colTextFore); dc.DrawText(str, ClientRect, DT_CENTER | DT_VCENTER | DT_SINGLELINE); } } void CTextProgressCtrl::SetForeColour(COLORREF col) { m_colFore = col; } void CTextProgressCtrl::SetBkColour(COLORREF col) { m_colBk = col; } void CTextProgressCtrl::SetTextForeColour(COLORREF col) { m_colTextFore = col; } void CTextProgressCtrl::SetTextBkColour(COLORREF col) { m_colTextBk = col; } COLORREF CTextProgressCtrl::GetForeColour() { return m_colFore; } COLORREF CTextProgressCtrl::GetBkColour() { return m_colBk; } COLORREF CTextProgressCtrl::GetTextForeColour() { return m_colTextFore; } COLORREF CTextProgressCtrl::GetTextBkColour() { return m_colTextBk; } ///////////////////////////////////////////////////////////////////////////// // CTextProgressCtrl message handlers void CTextProgressCtrl::SetShowText(BOOL bShow) { if (::IsWindow(m_hWnd) && m_bShowText != bShow)