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

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：