很好的button类 实现文件 3


HBITMAP CButtonST::CreateBitmapMask(HBITMAP hSourceBitmap, DWORD dwWidth, DWORD dwHeight, COLORREF crTransColor)
{
    HBITMAP        hMask        = NULL;
    HDC            hdcSrc        = NULL;
    HDC            hdcDest        = NULL;
    HBITMAP        hbmSrcT        = NULL;
    HBITMAP        hbmDestT    = NULL;
    COLORREF    crSaveBk;
    COLORREF    crSaveDestText;

    hMask = ::CreateBitmap(dwWidth, dwHeight, 1, 1, NULL);
    if (hMask == NULL)    return NULL;

    hdcSrc    = ::CreateCompatibleDC(NULL);
    hdcDest    = ::CreateCompatibleDC(NULL);

    hbmSrcT = (HBITMAP)::SelectObject(hdcSrc, hSourceBitmap);
    hbmDestT = (HBITMAP)::SelectObject(hdcDest, hMask);

    crSaveBk = ::SetBkColor(hdcSrc, crTransColor);

    ::BitBlt(hdcDest, 0, 0, dwWidth, dwHeight, hdcSrc, 0, 0, SRCCOPY);

    crSaveDestText = ::SetTextColor(hdcSrc, RGB(255, 255, 255));
    ::SetBkColor(hdcSrc,RGB(0, 0, 0));

    ::BitBlt(hdcSrc, 0, 0, dwWidth, dwHeight, hdcDest, 0, 0, SRCAND);

    SetTextColor(hdcDest, crSaveDestText);

    ::SetBkColor(hdcSrc, crSaveBk);
    ::SelectObject(hdcSrc, hbmSrcT);
    ::SelectObject(hdcDest, hbmDestT);

    ::DeleteDC(hdcSrc);
    ::DeleteDC(hdcDest);

    return hMask;
} // End of CreateBitmapMask

//
// Parameters:
//        [IN]    bHasTitle
//                TRUE if the button has a text
//        [IN]    rpItem
//                A pointer to a RECT structure indicating the allowed paint area
//        [IN/OUT]rpTitle
//                A pointer to a CRect object indicating the paint area reserved for the
//                text. This structure will be modified if necessary.
//        [IN]    bIsPressed
//                TRUE if the button is currently pressed
//        [IN]    dwWidth
//                Width of the image (icon or bitmap)
//        [IN]    dwHeight
//                Height of the image (icon or bitmap)
//        [OUT]    rpImage
//                A pointer to a CRect object that will receive the area available to the image
//
void CButtonST::PrepareImageRect(BOOL bHasTitle, RECT* rpItem, CRect* rpTitle, BOOL bIsPressed, DWORD dwWidth, DWORD dwHeight, CRect* rpImage)
{
    CRect rBtn;

    rpImage->CopyRect(rpItem);

    switch (m_byAlign)
    {
        case ST_ALIGN_HORIZ:
            if (bHasTitle == FALSE)
            {
                // Center image horizontally
                rpImage->left += ((rpImage->Width() - (long)dwWidth)/2);
            }
            else
            {
                // Image must be placed just inside the focus rect
                rpImage->left += m_ptImageOrg.x;  
                rpTitle->left += dwWidth + m_ptImageOrg.x;
            }
            // Center image vertically
            rpImage->top += ((rpImage->Height() - (long)dwHeight)/2);
            break;

        case ST_ALIGN_HORIZ_RIGHT:
            GetClientRect(&rBtn);
            if (bHasTitle == FALSE)
            {
                // Center image horizontally
                rpImage->left += ((rpImage->Width() - (long)dwWidth)/2);
            }
            else
            {
                // Image must be placed just inside the focus rect
                rpTitle->right = rpTitle->Width() - dwWidth - m_ptImageOrg.x;
                rpTitle->left = m_ptImageOrg.x;
                rpImage->left = rBtn.right - dwWidth - m_ptImageOrg.x;
                // Center image vertically
                rpImage->top += ((rpImage->Height() - (long)dwHeight)/2);
            }
            break;
        
        case ST_ALIGN_VERT:
            // Center image horizontally
            rpImage->left += ((rpImage->Width() - (long)dwWidth)/2);
            if (bHasTitle == FALSE)
            {
                // Center image vertically
                rpImage->top += ((rpImage->Height() - (long)dwHeight)/2);           
            }
            else
            {
                rpImage->top = m_ptImageOrg.y;
                rpTitle->top += dwHeight;
            }
            break;

        case ST_ALIGN_OVERLAP:
            break;
    } // switch
    
    // If button is pressed then press image also
    if (bIsPressed && m_bIsCheckBox == FALSE)
        rpImage->OffsetRect(m_ptPressedOffset.x, m_ptPressedOffset.y);
} // End of PrepareImageRect

void CButtonST::DrawTheIcon(CDC* pDC, BOOL bHasTitle, RECT* rpItem, CRect* rpCaption, BOOL bIsPressed, BOOL bIsDisabled)
{
    BYTE        byIndex        = 0;

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

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

    // Ole'!
    pDC->DrawState(    rImage.TopLeft(),
                    rImage.Size(), 
                    m_csIcons[byIndex].hIcon,
                    (bIsDisabled ? DSS_DISABLED : DSS_NORMAL), 
                    (CBrush*)NULL);
} // End of DrawTheIcon

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)
    {
        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

void CButtonST::DrawTheText(CDC* pDC, LPCTSTR lpszText, RECT* rpItem, CRect* rpCaption, BOOL bIsPressed, BOOL bIsDisabled)
{
    // Draw the button's title
    // If button is pressed then "press" title also
    if (m_bIsPressed && m_bIsCheckBox == FALSE)
        rpCaption->OffsetRect(m_ptPressedOffset.x, m_ptPressedOffset.y);

    // ONLY FOR DEBUG 
    //CBrush brBtnShadow(RGB(255, 0, 0));
    //pDC->FrameRect(rCaption, &brBtnShadow);

    // Center text
    CRect centerRect = rpCaption;
    pDC->DrawText(lpszText, -1, rpCaption, DT_WORDBREAK | DT_CENTER | DT_CALCRECT);
    rpCaption->OffsetRect((centerRect.Width() - rpCaption->Width())/2, (centerRect.Height() - rpCaption->Height())/2);
    /* RFU
    rpCaption->OffsetRect(0, (centerRect.Height() - rpCaption->Height())/2);
    rpCaption->OffsetRect((centerRect.Width() - rpCaption->Width())-4, (centerRect.Height() - rpCaption->Height())/2);
    */

    pDC->SetBkMode(TRANSPARENT);
    /*
    pDC->DrawState(rCaption->TopLeft(), rCaption->Size(), (LPCTSTR)sTitle, (bIsDisabled ? DSS_DISABLED : DSS_NORMAL), 
                    TRUE, 0, (CBrush*)NULL);
    */
    if (m_bIsDisabled)
    {
        rpCaption->OffsetRect(1, 1);
        pDC->SetTextColor(::GetSysColor(COLOR_3DHILIGHT));
        pDC->DrawText(lpszText, -1, rpCaption, DT_WORDBREAK | DT_CENTER);
        rpCaption->OffsetRect(-1, -1);
        pDC->SetTextColor(::GetSysColor(COLOR_3DSHADOW));
        pDC->DrawText(lpszText, -1, rpCaption, DT_WORDBREAK | DT_CENTER);
    } // if
    else
    {
        if (m_bMouseOnButton || m_bIsPressed) 
        {
            pDC->SetTextColor(m_crColors[BTNST_COLOR_FG_IN]);
            pDC->SetBkColor(m_crColors[BTNST_COLOR_BK_IN]);
        } // if
        else 
        {
            if (m_bIsFocused)
            { 
                pDC->SetTextColor(m_crColors[BTNST_COLOR_FG_FOCUS]); 
                pDC->SetBkColor(m_crColors[BTNST_COLOR_BK_FOCUS]); 
            } // if
            else 
            {
                pDC->SetTextColor(m_crColors[BTNST_COLOR_FG_OUT]); 
                pDC->SetBkColor(m_crColors[BTNST_COLOR_BK_OUT]); 
            } // else
        } // else
        pDC->DrawText(lpszText, -1, rpCaption, DT_WORDBREAK | DT_CENTER);
    } // if
} // End of DrawTheText

// This function creates a grayscale bitmap starting from a given bitmap.
// The resulting bitmap will have the same size of the original one.
//
// Parameters:
//        [IN]    hBitmap
//                Handle to the original bitmap.
//        [IN]    dwWidth
//                Specifies the bitmap width, in pixels.
//        [IN]    dwHeight
//                Specifies the bitmap height, in pixels.
//        [IN]    crTrans
//                Color to be used as transparent color. This color will be left unchanged.
//
// Return value:
//        If the function succeeds, the return value is the handle to the newly created
//        grayscale bitmap.
//        If the function fails, the return value is NULL.
//
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

// This function creates a bitmap that is 25% darker than the original.
// The resulting bitmap will have the same size of the original one.
//
// Parameters:
//        [IN]    hBitmap
//                Handle to the original bitmap.
//        [IN]    dwWidth
//                Specifies the bitmap width, in pixels.
//        [IN]    dwHeight
//                Specifies the bitmap height, in pixels.
//        [IN]    crTrans
//                Color to be used as transparent color. This color will be left unchanged.
//
// Return value:
//        If the function succeeds, the return value is the handle to the newly created
//        darker bitmap.
//        If the function fails, the return value is NULL.
//
HBITMAP CButtonST::CreateDarkerBitmap(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;

        for (dwLoopY = 0; dwLoopY < dwHeight; dwLoopY++)
        {
            for (dwLoopX = 0; dwLoopX < dwWidth; dwLoopX++)
            {
                crPixel = ::GetPixel(hMemDC2, dwLoopX, dwLoopY);

                if (crPixel != crTrans)
                    ::SetPixel(hMemDC1, dwLoopX, dwLoopY, DarkenColor(crPixel, 0.25));
                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 CreateDarkerBitmap
Posted on 2007-04-12 11:47 艾凡赫 阅读(624) 评论(0)  编辑 收藏 引用 所属分类: MFC技术

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