这是一个比较简单的有关于进度条控制的类，它在进度框中能够显示文件名和百分比，我想读者肯定在装软件的时候看到过。这个类最重要的功能就是允许在进度条中显示文字，如下：
void setshowtext(bool bshow);
你可以通过这个函数来设置是否能显示文字。设置文字你可以用cwnd::setwindowtext，如果你用函数setshowtext(true)来设置能显示文字，但是你没有用cwnd::setwindowtext来设置要显示的文字是什么，那么该类就会用默认的设置，只显示进度百分比，这点大家还是要注意的。
由于本人是菜鸟级的VC编程手，还没有完全理解其中的内容，也就是说没有看完全部的代码，我希望读者能把它读完，会更有好处。下面是其中的一些函数的功能，请大家笑纳：
void SetForeColour(colorref col) 设置进度条中的条的颜色
void SetBkColour(colorref col) 设置进度条的背景色
void SetTextForeColour(colorref col) 当进度条没有覆盖文本时，文本的颜色
void SetTextBkColour(colorref col) 当进度条覆盖文本时，文本的颜色
CORLORREF GetForeColour() 得到进度条中条的颜色
CORLORREF GetBkColour() 得到进度条的背景色
CORLORREF GetTextForeColour() 当进度条没有覆盖文本时，得到文本的颜色
CORLORREF GetTextBkColour() 当进度条覆盖文本时，得到文本的颜色
下面是全部的代码，包括H文件CPP文件
//以下是H文件
#if !defined(AFX_TEXTPROGRESSCTRL_H__4C78DBBE_EFB6_11D1_AB14_203E25000000__INCLUDED_)
#define AFX_TEXTPROGRESSCTRL_H__4C78DBBE_EFB6_11D1_AB14_203E25000000__INCLUDED_
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
// TextProgressCtrl.h : header file
//
// Written by Chris Maunder (chrismaunder@codeguru.com)
// Copyright 1998.
/////////////////////////////////////////////////////////////////////////////
// CTextProgressCtrl window
class CTextProgressCtrl : public CProgressCtrl
{
// Construction
public:
CTextProgressCtrl();
// Attributes
public:
// Operations
public:
int SetPos(int nPos);
int StepIt();
void SetRange(int nLower, int nUpper);
int OffsetPos(int nPos);
int SetStep(int nStep);
void SetForeColour(COLORREF col);
void SetBkColour(COLORREF col);
void SetTextForeColour(COLORREF col);
void SetTextBkColour(COLORREF col);
COLORREF GetForeColour();
COLORREF GetBkColour();
COLORREF GetTextForeColour();
COLORREF GetTextBkColour();
void SetShowText(BOOL bShow);
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CTextProgressCtrl)
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CTextProgressCtrl();
// Generated message map functions
protected:
int m_nPos,
m_nStepSize,
m_nMax,
m_nMin;
CString m_strText;
BOOL m_bShowText;
int m_nBarWidth;
COLORREF m_colFore,
m_colBk,
m_colTextFore,
m_colTextBk;
//{{AFX_MSG(CTextProgressCtrl)
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
afx_msg void OnPaint();
afx_msg void OnSize(UINT nType, int cx, int cy);
//}}AFX_MSG
afx_msg LRESULT OnSetText(UINT, LPCTSTR szText);
afx_msg LRESULT OnGetText(UINT cchTextMax, LPTSTR szText);
DECLARE_MESSAGE_MAP()
};
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_TEXTPROGRESSCTRL_H__4C78DBBE_EFB6_11D1_AB14_203E25000000__INCLUDED_)
//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
aintDC);