Bitmap Button 不可用的情况

根据CButtonST类写了一个可以加载Bitmap 、Icon的按钮

但是缺陷是设置Bitmap按钮为不可用的时候 

按钮就变成一个灰色框框 

想实现设置Bitmap按钮为不可用的时候 只是让Bitmap变为灰色 

这个怎么实现啊 

望高手赐教

PS：下面是CButtonST类中重画Bitmap的代码

void CButtonST::DrawTheBitmap(CDC* pDC, BOOL bHasTitle, RECT* rpItem, CRect* rpCaption, BOOL bIsPressed, BOOL bIsDisabled)
{
	HDC			hdcBmpMem	= NULL;
	HBITMAP		hbmOldBmp	= NULL;
	HDC			hdcMem		= NULL;
	HBITMAP		hbmT		= NULL;

	BYTE		byIndex		= 0;

	// Select the bitmap to use
	if ((m_bIsCheckBox && bIsPressed) || (!m_bIsCheckBox && (bIsPressed || m_bMouseOnButton)))
		byIndex = 0;
	else
		byIndex = (m_csBitmaps[1].hBitmap == NULL ? 0 : 1);

	CRect	rImage;
	PrepareImageRect(bHasTitle, rpItem, rpCaption, bIsPressed, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, &rImage);

	hdcBmpMem = ::CreateCompatibleDC(pDC->m_hDC);

	hbmOldBmp = (HBITMAP)::SelectObject(hdcBmpMem, m_csBitmaps[byIndex].hBitmap);

	hdcMem = ::CreateCompatibleDC(NULL);

	hbmT = (HBITMAP)::SelectObject(hdcMem, m_csBitmaps[byIndex].hMask);

	if (bIsDisabled && m_bShowDisabledBitmap) //按钮为不可用的时候的处理代码 m_bShowDisabledBitmap为TRUE
	{
		HDC		hDC = NULL;
		HBITMAP	hBitmap = NULL;

		hDC = ::CreateCompatibleDC(pDC->m_hDC);
		hBitmap = ::CreateCompatibleBitmap(pDC->m_hDC, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight);
		HBITMAP	hOldBmp2 = (HBITMAP)::SelectObject(hDC, hBitmap);

		RECT	rRect;
		rRect.left = 0;
		rRect.top = 0;
		rRect.right = rImage.right + 1;
		rRect.bottom = rImage.bottom + 1;
		::FillRect(hDC, &rRect, (HBRUSH)RGB(255, 255, 255));

		COLORREF crOldColor = ::SetBkColor(hDC, RGB(255,255,255));

		::BitBlt(hDC, 0, 0, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, hdcMem, 0, 0, SRCAND);
		::BitBlt(hDC, 0, 0, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, hdcBmpMem, 0, 0, SRCPAINT);

		::SetBkColor(hDC, crOldColor);
		::SelectObject(hDC, hOldBmp2);
		::DeleteDC(hDC);

		pDC->DrawState(	CPoint(rImage.left/*+1*/, rImage.top), 
						CSize(m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight), 
						hBitmap, DST_BITMAP | DSS_DISABLED);

		::DeleteObject(hBitmap);
	} // if
	else
	{
		::BitBlt(pDC->m_hDC, rImage.left, rImage.top, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, hdcMem, 0, 0, SRCAND);

		::BitBlt(pDC->m_hDC, rImage.left, rImage.top, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, hdcBmpMem, 0, 0, SRCPAINT);
	} // else

	::SelectObject(hdcMem, hbmT);
	::DeleteDC(hdcMem);

	::SelectObject(hdcBmpMem, hbmOldBmp);
	::DeleteDC(hdcBmpMem);
} // End of DrawTheBitmap

6 个解决方案

#1

#2

调整一下bmp灰度再贴上去按钮上吧

#3

引用 2 楼 nintendo_dskay 的回复:

调整一下bmp灰度再贴上去按钮上吧

赞成，在按钮废止时（其实未废止，仅仅是你不让其相应，方法是onclick加上返回），然后显示灰色的位图，然后就形成了那种变灰废止的效果

#4

设置为不可用后按钮应该还要重绘，不能用默认的重绘

#5

哇咔咔 自己解决啦 
说一下实现的思想 ：就是2楼和3楼的，实现将彩色Bitmap转换成灰色Bitmap 
最后重绘灰度Bitmap

我很不HD的使用了CButtonST中的彩色Bitmap向灰度Bitmap转换的函数实现
下面是实现以后的代码 大家自己看看吧 

void CButtonST::DrawTheBitmap(CDC* pDC, 
                              BOOL bHasTitle, 
                              RECT* rpItem, 
                              CRect* rpCaption, 
                              BOOL bIsPressed, 
                              BOOL bIsDisabled) //按钮是否可用
{
	HDC			hdcBmpMem	= NULL;
	HBITMAP		hbmOldBmp	= NULL;
	HDC			hdcMem		= NULL;
	HBITMAP		hbmT		= NULL;
  STRUCT_BITMAPS grayBitmap;
	BYTE		byIndex		= 0;

	// Select the bitmap to use
	if ((m_bIsCheckBox && bIsPressed) || (!m_bIsCheckBox && (bIsPressed || m_bMouseOnButton)))
		byIndex = 0;
	else
		byIndex = (m_csBitmaps[1].hBitmap == NULL ? 0 : 1);
  
  CRect	rImage;
	PrepareImageRect(bHasTitle, rpItem, rpCaption, bIsPressed, m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight, &rImage);

	hdcBmpMem = ::CreateCompatibleDC(pDC->m_hDC);
  hdcMem = ::CreateCompatibleDC(NULL); 

  if (bIsDisabled && (NULL == m_csBitmaps[1].hBitmap))//创建灰色图像
  {
    grayBitmap.hBitmap = CreateGrayscaleBitmap(m_csBitmaps[0].hBitmap,       //Bitmap ID
                                               m_csBitmaps[0].dwWidth,
                                               m_csBitmaps[0].dwHeight,
                                               m_csBitmaps[0].crTransparent);
    grayBitmap.dwWidth = m_csBitmaps[0].dwWidth;
    grayBitmap.dwHeight = m_csBitmaps[0].dwHeight;
    grayBitmap.crTransparent = m_csBitmaps[0].crTransparent;
    grayBitmap.hMask = CreateBitmapMask( grayBitmap.hBitmap,
                                         grayBitmap.dwWidth,
                                         grayBitmap.dwHeight,
                                         grayBitmap.crTransparent);
    hbmOldBmp = (HBITMAP)::SelectObject(hdcBmpMem, grayBitmap.hBitmap);
    hbmT = (HBITMAP)::SelectObject(hdcMem, grayBitmap.hMask);
  }else
  {
	  hbmOldBmp = (HBITMAP)::SelectObject(hdcBmpMem, m_csBitmaps[byIndex].hBitmap);
    hbmT = (HBITMAP)::SelectObject(hdcMem, m_csBitmaps[byIndex].hMask);
  }

	if (bIsDisabled && m_bShowDisabledBitmap)     //button disabled
	{
		HDC		hDC = NULL;
		HBITMAP	hBitmap = NULL;

    hDC = ::CreateCompatibleDC(pDC->m_hDC);
		hBitmap = ::CreateCompatibleBitmap(pDC->m_hDC, 
                                       m_csBitmaps[byIndex].dwWidth, 
                                       m_csBitmaps[byIndex].dwHeight);
		HBITMAP	hOldBmp2 = (HBITMAP)::SelectObject(hDC, hBitmap);

		COLORREF crOldColor = ::SetBkColor(hDC, RGB(255,255,255));

    ::BitBlt(hDC, 0, 0, 
             m_csBitmaps[byIndex].dwWidth, 
             m_csBitmaps[byIndex].dwHeight, 
             hdcMem, 0, 0, SRCAND);
		::BitBlt(hDC, 0, 0, 
             m_csBitmaps[byIndex].dwWidth, 
             m_csBitmaps[byIndex].dwHeight, 
             hdcBmpMem, 0, 0, SRCPAINT);

		::SetBkColor(hDC, crOldColor);
		::SelectObject(hDC, hOldBmp2);
		::DeleteDC(hDC);

		pDC->DrawState(	CPoint(rImage.left/*+1*/, rImage.top), 
						CSize(m_csBitmaps[byIndex].dwWidth, m_csBitmaps[byIndex].dwHeight), 
            hBitmap, DST_BITMAP | DSS_NORMAL);

		::DeleteObject(hBitmap);
	} // if
	else        //button abled
	{
		::BitBlt(pDC->m_hDC, 
             rImage.left, 
             rImage.top, 
             m_csBitmaps[byIndex].dwWidth, 
             m_csBitmaps[byIndex].dwHeight, 
             hdcMem, 0, 0, SRCAND);

		::BitBlt(pDC->m_hDC, 
             rImage.left, 
             rImage.top, 
             m_csBitmaps[byIndex].dwWidth, 
             m_csBitmaps[byIndex].dwHeight, 
             hdcBmpMem, 0, 0, SRCPAINT);
	} // else

	::SelectObject(hdcMem, hbmT);
	::DeleteDC(hdcMem);

	::SelectObject(hdcBmpMem, hbmOldBmp);
	::DeleteDC(hdcBmpMem);
} // End of DrawTheBitmap

特此结贴~~~~~ ^^

#6

厄 这个是CButtonSt中的将彩色Bitmap转换成灰度图的代码：

HBITMAP CButtonST::CreateGrayscaleBitmap(HBITMAP hBitmap, 
                                         DWORD dwWidth, 
                                         DWORD dwHeight, 
                                         COLORREF crTrans)
{
	HBITMAP		hGrayBitmap = NULL;
	HDC			hMainDC = NULL, hMemDC1 = NULL, hMemDC2 = NULL;
	HBITMAP		hOldBmp1 = NULL, hOldBmp2 = NULL;

	hMainDC = ::GetDC(NULL);
	if (hMainDC == NULL)	return NULL;
	hMemDC1 = ::CreateCompatibleDC(hMainDC);
	if (hMemDC1 == NULL)
	{
		::ReleaseDC(NULL, hMainDC);
		return NULL;
	} // if
	hMemDC2 = ::CreateCompatibleDC(hMainDC);
	if (hMemDC2 == NULL)
	{
		::DeleteDC(hMemDC1);
		::ReleaseDC(NULL, hMainDC);
		return NULL;
	} // if

	hGrayBitmap = ::CreateCompatibleBitmap(hMainDC, dwWidth, dwHeight);
	if (hGrayBitmap)
	{
		hOldBmp1 = (HBITMAP)::SelectObject(hMemDC1, hGrayBitmap);
		hOldBmp2 = (HBITMAP)::SelectObject(hMemDC2, hBitmap);

		//::BitBlt(hMemDC1, 0, 0, dwWidth, dwHeight, hMemDC2, 0, 0, SRCCOPY);

		DWORD		dwLoopY = 0, dwLoopX = 0;
		COLORREF	crPixel = 0;
		BYTE		byNewPixel = 0;

		for (dwLoopY = 0; dwLoopY < dwHeight; dwLoopY++)
		{
			for (dwLoopX = 0; dwLoopX < dwWidth; dwLoopX++)
			{
				crPixel = ::GetPixel(hMemDC2, dwLoopX, dwLoopY);
				byNewPixel = (BYTE)((GetRValue(crPixel) * 0.299) + (GetGValue(crPixel) * 0.587) + (GetBValue(crPixel) * 0.114));

				if (crPixel != crTrans)
					::SetPixel(hMemDC1, dwLoopX, dwLoopY, RGB(byNewPixel, byNewPixel, byNewPixel));
				else
					::SetPixel(hMemDC1, dwLoopX, dwLoopY, crPixel);
			} // for
		} // for

		::SelectObject(hMemDC1, hOldBmp1);
		::SelectObject(hMemDC2, hOldBmp2);
	} // if

	::DeleteDC(hMemDC1);
	::DeleteDC(hMemDC2);
	::ReleaseDC(NULL, hMainDC);

	return hGrayBitmap;
} // End of CreateGrayscaleBitmap