一个透明的CStatic控件【原创】

如果我们自画了一个有背景的对话框，static控件在上面不透明是很不爽的。

改进方法很简单，从MFC的CStatic派生一个类，下面是相应的代码：

（使用的时候修改控件ID为其他值，不要是IDC_STATIC，否则不能添加用于ddx的变量）

//=========================================================

// Class: CTransparentStatic

// Product: iW988

// File : TransparentStatic.h

// Author : 天衣有缝

// Created: 2004.12.29 23:40

// Description:

// ValueAdded main program for iW988.

// Contact:ShenZhen @ GuangDong

// waterpub@mail.csdn.net

//=========================================================

#pragma once

// CTransparentStatic

class CTransparentStatic : public CStatic

{

DECLARE_DYNAMIC(CTransparentStatic)

public:

CTransparentStatic();

virtual ~CTransparentStatic();

protected:

DECLARE_MESSAGE_MAP()

public:

afx_msg void OnPaint();

};

//=========================================================

// Class: CTransparentStatic

// Product: iW988

// File : TransparentStatic.cpp

// Author : 天衣有缝

// Created: 2004.12.29 23:40

// Description:

// ValueAdded main program for iW988.

// Contact:ShenZhen @ GuangDong

// waterpub@mail.csdn.net

//=========================================================

// TransparentStatic.cpp : implementation file

#include "stdafx.h"

#include "TransparentStatic.h"

// CTransparentStatic

IMPLEMENT_DYNAMIC(CTransparentStatic, CStatic)

CTransparentStatic::CTransparentStatic()

{

}

CTransparentStatic::~CTransparentStatic()

{

}

BEGIN_MESSAGE_MAP(CTransparentStatic, CStatic)

ON_WM_PAINT()

END_MESSAGE_MAP()

// CTransparentStatic message handlers

void CTransparentStatic::OnPaint()

{

CPaintDC dc(this); // 控件的设备文件

// 取得位置

CRect client_rect;

GetClientRect(client_rect);

// 取得文本

CString szText;

GetWindowText(szText);

// 取得字体，并选入设备文件

CFont *pFont, *pOldFont;

pFont = GetFont();

pOldFont = dc.SelectObject(pFont);

// 用透明背景填充设备文件

dc.SetBkMode(TRANSPARENT);

// 显示文字

dc.DrawText(szText, client_rect, 0);

// 清除字体

dc.SelectObject(pOldFont);

}

转载请注意：

下面的背景对话框是从CButtonST整理二来，版权属于：Davide Calabro' davide_calabro@yahoo.com

//=========================================================//// Copyright (c) 2000-2004 iWise Technologies，Co. Ltd.// All Rights Reserved.//// Class: CBkDialogST//// Product: iW988// File : BkDialogST.h// Author : 天衣有缝// Created: 2004.12.29 23:50// // Description:// ValueAdded main program for iW988.// Contact:ShenZhen @ GuangDong// waterpub@mail.csdn.net////========================================================= #pragma once

class CBkDialogST : public CDialog

{

public:

CBkDialogST(CWnd* pParent = NULL); // 标准构造函数

CBkDialogST(UINT uResourceID, CWnd* pParent = NULL);

CBkDialogST(LPCTSTR pszResourceID, CWnd* pParent = NULL);

virtual ~CBkDialogST(); // 析构

DWORD SetMode(BYTE byMode, BOOL bRepaint = TRUE); // 设置背景位图显示模式

DWORD SetBitmap(HBITMAP hBitmap); // 设置背景位图

DWORD SetBitmap(int nBitmap); // 设置背景位图

DWORD ActivateEasyMoveMode(BOOL bActivate); // 客户区可以随意拖动

DWORD ShrinkToFit(BOOL bRepaint = TRUE); // 使对话框只显示一个背景位图大小，左上角位置不变

enum { // 背景位图显示模式

BKDLGST_MODE_TILE , // 平铺

BKDLGST_MODE_CENTER , // 居中

BKDLGST_MODE_STRETCH , // 拉伸

BKDLGST_MODE_TILETOP , // 只平铺一行，top

BKDLGST_MODE_TILEBOTTOM , // 只平铺一行，bottom

BKDLGST_MODE_TILELEFT , // 只平铺一列，left

BKDLGST_MODE_TILERIGHT , // 只平铺一列，right

BKDLGST_MODE_TOPLEFT , // 只显示一图：top left

BKDLGST_MODE_TOPRIGHT , // 只显示一图：top right

BKDLGST_MODE_TOPCENTER , // 只显示一图：top center

BKDLGST_MODE_BOTTOMLEFT , // 只显示一图：bottom left

BKDLGST_MODE_BOTTOMRIGHT, // 只显示一图：bottom right

BKDLGST_MODE_BOTTOMCENTER, // 只显示一图：bottom center

BKDLGST_MAX_MODES

};

enum {

BKDLGST_OK , // 函数设置成功

BKDLGST_INVALIDRESOURCE , // 无效的位图资源

BKDLGST_INVALIDMODE // 无效的显示模式

};

protected:

//{{AFX_MSG(CBkDialogST)

afx_msg BOOL OnEraseBkgnd(CDC* pDC);

afx_msg void OnSize(UINT nType, int cx, int cy);

//}}AFX_MSG

virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持

virtual void OnPostEraseBkgnd(CDC* pDC); // 扩展功能

afx_msg void OnLButtonDown(UINT nFlags, CPoint point); // 支持鼠标拖动对话框

static short GetVersionI() {return 11;} // 程序版本

static LPCTSTR GetVersionC() {return (LPCTSTR)_T("1.1");}// 程序版本

private:

void Init();

void FreeResources(BOOL bCheckForNULL = TRUE);

HBITMAP m_hBitmap ; // 位图句柄Handle to bitmap

DWORD m_dwWidth ; // 位图宽度

DWORD m_dwHeight ; // 位图高度

BYTE m_byMode ; // 当前显示模式

BOOL m_bEasyMoveMode ; // 是否可用鼠标拖动对话框

DECLARE_MESSAGE_MAP()

};

//=========================================================//// Copyright (c) 2000-2004 iWise Technologies，Co. Ltd.// All Rights Reserved.//// Class: CBkDialogST//// Product: iW988// File : BkDialogST.cpp// Author : 天衣有缝// Created: 2004.12.29 23:50// // Description:// ValueAdded main program for iW988.// Contact:ShenZhen @ GuangDong// waterpub@mail.csdn.net////========================================================= #include "stdafx.h"

#include "BkDialogST.h"

CBkDialogST::CBkDialogST(CWnd* pParent /*=NULL*/)

{

Init();

}

CBkDialogST::CBkDialogST(UINT uResourceID, CWnd* pParent)

: CDialog(uResourceID, pParent)

{

Init();

}

CBkDialogST::CBkDialogST(LPCTSTR pszResourceID, CWnd* pParent)

: CDialog(pszResourceID, pParent)

{

Init();

}

CBkDialogST::~CBkDialogST()

{

FreeResources();

}

void CBkDialogST::DoDataExchange(CDataExchange* pDX)

{

CDialog::DoDataExchange(pDX);

}

BEGIN_MESSAGE_MAP(CBkDialogST, CDialog)

ON_WM_ERASEBKGND()

ON_WM_SIZE()

ON_WM_LBUTTONDOWN()

END_MESSAGE_MAP()

void CBkDialogST::Init()

{

FreeResources(FALSE);

// 默认的位图显示模式

m_byMode = BKDLGST_MODE_TILE;

// 客户区可以随意拖动窗口

m_bEasyMoveMode = TRUE;

}

void CBkDialogST::FreeResources(BOOL bCheckForNULL)

{

// 卸载资源

if (bCheckForNULL == TRUE)

{

if (m_hBitmap) ::DeleteObject(m_hBitmap);

}

m_hBitmap = NULL;

m_dwWidth = 0;

m_dwHeight = 0;

}

void CBkDialogST::OnLButtonDown(UINT nFlags, CPoint point)

{

// 客户区可以随意拖动窗口

if (m_bEasyMoveMode == TRUE)

PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x, point.y));

CDialog::OnLButtonDown(nFlags, point);

}

DWORD CBkDialogST::ActivateEasyMoveMode(BOOL bActivate)

{

// 设置是否可以随意拖动窗口

m_bEasyMoveMode = bActivate;

return BKDLGST_OK;

}

DWORD CBkDialogST::SetBitmap(int nBitmap)

{

HBITMAP hBitmap = NULL;

HINSTANCE hInstResource = NULL;

// 找到位图资源的句柄

hInstResource = AfxFindResourceHandle(MAKEINTRESOURCE(nBitmap), RT_BITMAP);

// 加载位图

hBitmap = (HBITMAP)::LoadImage(hInstResource, MAKEINTRESOURCE(nBitmap), IMAGE_BITMAP, 0, 0, 0);

return SetBitmap(hBitmap); // 调用下面的函数

}

DWORD CBkDialogST::SetBitmap(HBITMAP hBitmap)

{

int nRetValue;

BITMAP csBitmapSize;

// 卸载资源

FreeResources();

if (hBitmap)

{

m_hBitmap = hBitmap;

// 取得位图信息

nRetValue = ::GetObject(hBitmap, sizeof(csBitmapSize), &csBitmapSize);

if (nRetValue == 0)

{

// 无效的位图句柄

FreeResources();

return BKDLGST_INVALIDRESOURCE;

}

m_dwWidth = (DWORD)csBitmapSize.bmWidth; // 位图宽度

m_dwHeight = (DWORD)csBitmapSize.bmHeight; // 位图高度

}

Invalidate();

return BKDLGST_OK;

}

DWORD CBkDialogST::SetMode(BYTE byMode, BOOL bRepaint)

{

if (byMode >= BKDLGST_MAX_MODES) return BKDLGST_INVALIDMODE;

// 设置位图显示模式

m_byMode = byMode;

if (bRepaint == TRUE) Invalidate();

return BKDLGST_OK;

}

DWORD CBkDialogST::ShrinkToFit(BOOL bRepaint)

{

// 使对话框只显示一个背景位图大小，左上角位置不变

CRect rWnd;

CRect rClient;

DWORD dwDiffCX;

DWORD dwDiffCY;

::GetWindowRect(m_hWnd, &rWnd); // 相对于屏幕的位置

::GetClientRect(m_hWnd, &rClient); // 客户区相对于对话框左上角的位置

dwDiffCX = rWnd.Width() - rClient.Width(); // 左右边框线宽度之和

dwDiffCY = rWnd.Height() - rClient.Height(); // 对话框标题兰和下边框宽度之和

m_byMode = BKDLGST_MODE_CENTER; // 显示模式为居中一副图

// 计算边框大小，再移动之，使客户区只显示一个位图大小

MoveWindow(rWnd.left, rWnd.top, dwDiffCX + m_dwWidth, dwDiffCY + m_dwHeight, bRepaint);

return BKDLGST_OK;

}

void CBkDialogST::OnSize(UINT nType, int cx, int cy)

{

CDialog::OnSize(nType, cx, cy);

// 如果有位图资源则重画

if (m_hBitmap != NULL)

{

Invalidate();

}

void CBkDialogST::OnPostEraseBkgnd(CDC* pDC)

{

// 留作扩展用

}

BOOL CBkDialogST::OnEraseBkgnd(CDC* pDC)

{

CRect rWnd;

int nX = 0;

int nY = 0;

BOOL bRetValue = CDialog::OnEraseBkgnd(pDC);

// 位图加载时才执行重画背景

if (m_hBitmap)

{

GetClientRect(rWnd); // 客户区位置，相对于对话框左上角

CDC dcMemoryDC; // 目标图形设备

CBitmap bmpMemoryBitmap; // 上面设备的位图

CBitmap* pbmpOldMemoryBitmap = NULL;

dcMemoryDC.CreateCompatibleDC(pDC); // 创建与设备文件兼容的内存图形设备

bmpMemoryBitmap.CreateCompatibleBitmap(pDC, rWnd.Width(), rWnd.Height());

// 用内存图形设备初始化这个内存位图

pbmpOldMemoryBitmap = (CBitmap*)dcMemoryDC.SelectObject(&bmpMemoryBitmap);

// 内存图形设备中选入这个位图

dcMemoryDC.FillSolidRect(rWnd, pDC->GetBkColor()); // 填充背景色

CDC dcTempDC; // 源图形设备，位图先选入之

HBITMAP hbmpOldTempBitmap = NULL;

dcTempDC.CreateCompatibleDC(pDC);

hbmpOldTempBitmap = (HBITMAP)::SelectObject(dcTempDC.m_hDC, m_hBitmap);

switch (m_byMode)

{

case BKDLGST_MODE_TILE:

// 平铺位图

while (nY < rWnd.Height())

{

while(nX < rWnd.Width())

{

dcMemoryDC.BitBlt(nX, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

nX += m_dwWidth;

}

nX = 0;

nY += m_dwHeight;

}

break;

case BKDLGST_MODE_CENTER:

nX = ((rWnd.Width() - m_dwWidth)/2);

nY = ((rWnd.Height() - m_dwHeight)/2);

dcMemoryDC.BitBlt(nX, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_STRETCH:

// 拉伸位图

dcMemoryDC.StretchBlt(0, 0, rWnd.Width(), rWnd.Height(), &dcTempDC, 0, 0, m_dwWidth, m_dwHeight, SRCCOPY);

break;

case BKDLGST_MODE_TILETOP:

while(nX < rWnd.Width())

{

dcMemoryDC.BitBlt(nX, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

nX += m_dwWidth;

}

break;

case BKDLGST_MODE_TILEBOTTOM:

while(nX < rWnd.Width())

{

dcMemoryDC.BitBlt(nX, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

nX += m_dwWidth;

}

break;

case BKDLGST_MODE_TILELEFT:

while (nY < rWnd.Height())

{

dcMemoryDC.BitBlt(0, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

nY += m_dwHeight;

}

break;

case BKDLGST_MODE_TILERIGHT:

while (nY < rWnd.Height())

{

dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

nY += m_dwHeight;

}

break;

case BKDLGST_MODE_TOPLEFT:

dcMemoryDC.BitBlt(0, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_TOPRIGHT:

dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_TOPCENTER:

nX = ((rWnd.Width() - m_dwWidth)/2);

dcMemoryDC.BitBlt(nX, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_BOTTOMLEFT:

dcMemoryDC.BitBlt(0, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_BOTTOMRIGHT:

dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

case BKDLGST_MODE_BOTTOMCENTER:

nX = ((rWnd.Width() - m_dwWidth)/2);

dcMemoryDC.BitBlt(nX, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

break;

}

pDC->BitBlt(0, 0, rWnd.Width(), rWnd.Height(), &dcMemoryDC, 0, 0, SRCCOPY);

OnPostEraseBkgnd(&dcMemoryDC);

::SelectObject(dcTempDC.m_hDC, hbmpOldTempBitmap);

dcMemoryDC.SelectObject(pbmpOldMemoryBitmap);

}

return bRetValue;

}