imagelist.c

winNT技术操作系统,国外开放的原代码和LIUX一样

    BitBlt (InternalDrag.himl->hdcMask, 0, 0, cx, cy, himlTrack->hdcMask, iTrack * cx, 0, SRCCOPY);

    InternalDrag.himl->cCurImage = 1;

    return TRUE;
}


/*************************************************************************
 * ImageList_Copy [COMCTL32.@]
 *
 *  Copies an image of the source image list to an image of the
 *  destination image list. Images can be copied or swapped.
 *
 * PARAMS
 *     himlDst [I] handle to the destination image list
 *     iDst    [I] destination image index.
 *     himlSrc [I] handle to the source image list
 *     iSrc    [I] source image index
 *     uFlags  [I] flags for the copy operation
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     Copying from one image list to another is possible. The original
 *     implementation just copies or swaps within one image list.
 *     Could this feature become a bug??? ;-)
 */

BOOL WINAPI
ImageList_Copy (HIMAGELIST himlDst, INT iDst,	HIMAGELIST himlSrc,
		INT iSrc, UINT uFlags)
{
    POINT ptSrc, ptDst;

    TRACE("himlDst=%p iDst=%d himlSrc=%p iSrc=%d\n", himlDst, iDst, himlSrc, iSrc);

    if (!is_valid(himlSrc) || !is_valid(himlDst))
	return FALSE;
    if ((iDst < 0) || (iDst >= himlDst->cCurImage))
	return FALSE;
    if ((iSrc < 0) || (iSrc >= himlSrc->cCurImage))
	return FALSE;

    imagelist_point_from_index( himlDst, iDst, &ptDst );
    imagelist_point_from_index( himlSrc, iSrc, &ptSrc );

    if (uFlags & ILCF_SWAP) {
        /* swap */
        HDC     hdcBmp;
        HBITMAP hbmTempImage, hbmTempMask;

        hdcBmp = CreateCompatibleDC (0);

        /* create temporary bitmaps */
        hbmTempImage = CreateBitmap (himlSrc->cx, himlSrc->cy, 1,
                                       himlSrc->uBitsPixel, NULL);
        hbmTempMask = CreateBitmap (himlSrc->cx, himlSrc->cy, 1,
				      1, NULL);

        /* copy (and stretch) destination to temporary bitmaps.(save) */
        /* image */
        SelectObject (hdcBmp, hbmTempImage);
        StretchBlt   (hdcBmp, 0, 0, himlSrc->cx, himlSrc->cy,
                      himlDst->hdcImage, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      SRCCOPY);
        /* mask */
        SelectObject (hdcBmp, hbmTempMask);
        StretchBlt   (hdcBmp, 0, 0, himlSrc->cx, himlSrc->cy,
                      himlDst->hdcMask, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      SRCCOPY);

        /* copy (and stretch) source to destination */
        /* image */
        StretchBlt   (himlDst->hdcImage, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      himlSrc->hdcImage, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      SRCCOPY);
        /* mask */
        StretchBlt   (himlDst->hdcMask, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      himlSrc->hdcMask, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      SRCCOPY);

        /* copy (without stretching) temporary bitmaps to source (restore) */
        /* mask */
        BitBlt       (himlSrc->hdcMask, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      hdcBmp, 0, 0, SRCCOPY);

        /* image */
        BitBlt       (himlSrc->hdcImage, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      hdcBmp, 0, 0, SRCCOPY);
        /* delete temporary bitmaps */
        DeleteObject (hbmTempMask);
        DeleteObject (hbmTempImage);
        DeleteDC(hdcBmp);
    }
    else {
        /* copy image */
        StretchBlt   (himlDst->hdcImage, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      himlSrc->hdcImage, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      SRCCOPY);

        /* copy mask */
        StretchBlt   (himlDst->hdcMask, ptDst.x, ptDst.y, himlDst->cx, himlDst->cy,
                      himlSrc->hdcMask, ptSrc.x, ptSrc.y, himlSrc->cx, himlSrc->cy,
                      SRCCOPY);
    }

    return TRUE;
}


/*************************************************************************
 * ImageList_Create [COMCTL32.@]
 *
 * Creates a new image list.
 *
 * PARAMS
 *     cx       [I] image height
 *     cy       [I] image width
 *     flags    [I] creation flags
 *     cInitial [I] initial number of images in the image list
 *     cGrow    [I] number of images by which image list grows
 *
 * RETURNS
 *     Success: Handle to the created image list
 *     Failure: NULL
 */
HIMAGELIST WINAPI
ImageList_Create (INT cx, INT cy, UINT flags,
		  INT cInitial, INT cGrow)
{
    HIMAGELIST himl;
    INT      nCount;
    HBITMAP  hbmTemp;
    UINT     ilc = (flags & 0xFE);
    static const WORD aBitBlend25[] =
        {0xAA, 0x00, 0x55, 0x00, 0xAA, 0x00, 0x55, 0x00};

    static const WORD aBitBlend50[] =
        {0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA};

    TRACE("(%d %d 0x%x %d %d)\n", cx, cy, flags, cInitial, cGrow);

    himl = (HIMAGELIST)Alloc (sizeof(struct _IMAGELIST));
    if (!himl)
        return NULL;

    cGrow = (cGrow < 4) ? 4 : (cGrow + 3) & ~3;

    himl->magic     = IMAGELIST_MAGIC;
    himl->cx        = cx;
    himl->cy        = cy;
    himl->flags     = flags;
    himl->cMaxImage = cInitial + cGrow;
    himl->cInitial  = cInitial;
    himl->cGrow     = cGrow;
    himl->clrFg     = CLR_DEFAULT;
    himl->clrBk     = CLR_NONE;

    /* initialize overlay mask indices */
    for (nCount = 0; nCount < MAX_OVERLAYIMAGE; nCount++)
        himl->nOvlIdx[nCount] = -1;

    /* Create Image & Mask DCs */
    himl->hdcImage = CreateCompatibleDC (0);
    if (!himl->hdcImage)
        goto cleanup;
    if (himl->flags & ILC_MASK){
        himl->hdcMask = CreateCompatibleDC(0);
        if (!himl->hdcMask)
            goto cleanup;
    }

    /* Default to ILC_COLOR4 if none of the ILC_COLOR* flags are specified */
    if (ilc == ILC_COLOR)
        ilc = ILC_COLOR4;

    if (ilc >= ILC_COLOR4 && ilc <= ILC_COLOR32)
        himl->uBitsPixel = ilc;
    else
        himl->uBitsPixel = (UINT)GetDeviceCaps (himl->hdcImage, BITSPIXEL);

    if (himl->cMaxImage > 0) {
        himl->hbmImage = ImageList_CreateImage(himl->hdcImage, himl, himl->cMaxImage, cy);
	SelectObject(himl->hdcImage, himl->hbmImage);
    } else
        himl->hbmImage = 0;

    if ((himl->cMaxImage > 0) && (himl->flags & ILC_MASK)) {
        SIZE sz;

        imagelist_get_bitmap_size(himl, himl->cMaxImage, himl->cy, &sz);
        himl->hbmMask = CreateBitmap (sz.cx, sz.cy, 1, 1, NULL);
        if (himl->hbmMask == 0) {
            ERR("Error creating mask bitmap!\n");
            goto cleanup;
        }
        SelectObject(himl->hdcMask, himl->hbmMask);
    }
    else
        himl->hbmMask = 0;

    /* create blending brushes */
    hbmTemp = CreateBitmap (8, 8, 1, 1, &aBitBlend25);
    himl->hbrBlend25 = CreatePatternBrush (hbmTemp);
    DeleteObject (hbmTemp);

    hbmTemp = CreateBitmap (8, 8, 1, 1, &aBitBlend50);
    himl->hbrBlend50 = CreatePatternBrush (hbmTemp);
    DeleteObject (hbmTemp);

    TRACE("created imagelist %p\n", himl);
    return himl;

cleanup:
    if (himl) ImageList_Destroy(himl);
    return NULL;
}


/*************************************************************************
 * ImageList_Destroy [COMCTL32.@]
 *
 * Destroys an image list.
 *
 * PARAMS
 *     himl [I] handle to image list
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
ImageList_Destroy (HIMAGELIST himl)
{
    if (!is_valid(himl))
	return FALSE;

    /* delete image bitmaps */
    if (himl->hbmImage)
        DeleteObject (himl->hbmImage);
    if (himl->hbmMask)
        DeleteObject (himl->hbmMask);

    /* delete image & mask DCs */
    if (himl->hdcImage)
        DeleteDC(himl->hdcImage);
    if (himl->hdcMask)
        DeleteDC(himl->hdcMask);

    /* delete blending brushes */
    if (himl->hbrBlend25)
        DeleteObject (himl->hbrBlend25);
    if (himl->hbrBlend50)
        DeleteObject (himl->hbrBlend50);

    ZeroMemory(himl, sizeof(*himl));
    Free (himl);

    return TRUE;
}


/*************************************************************************
 * ImageList_DragEnter [COMCTL32.@]
 *
 * Locks window update and displays the drag image at the given position.
 *
 * PARAMS
 *     hwndLock [I] handle of the window that owns the drag image.
 *     x        [I] X position of the drag image.
 *     y        [I] Y position of the drag image.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     The position of the drag image is relative to the window, not
 *     the client area.
 */

BOOL WINAPI
ImageList_DragEnter (HWND hwndLock, INT x, INT y)
{
    TRACE("(hwnd=%p x=%d y=%d)\n", hwndLock, x, y);

    if (!is_valid(InternalDrag.himl))
	return FALSE;

    if (hwndLock)
	InternalDrag.hwnd = hwndLock;
    else
	InternalDrag.hwnd = GetDesktopWindow ();

    InternalDrag.x = x;
    InternalDrag.y = y;

    /* draw the drag image and save the background */
    if (!ImageList_DragShowNolock(TRUE)) {
	return FALSE;
    }

    return TRUE;
}


/*************************************************************************
 * ImageList_DragLeave [COMCTL32.@]
 *
 * Unlocks window update and hides the drag image.
 *
 * PARAMS
 *     hwndLock [I] handle of the window that owns the drag image.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
ImageList_DragLeave (HWND hwndLock)
{
    /* As we don't save drag info in the window this can lead to problems if
       an app does not supply the same window as DragEnter */
    /* if (hwndLock)
	InternalDrag.hwnd = hwndLock;
    else
	InternalDrag.hwnd = GetDesktopWindow (); */
    if(!hwndLock)
	hwndLock = GetDesktopWindow();
    if(InternalDrag.hwnd != hwndLock)
	FIXME("DragLeave hWnd != DragEnter hWnd\n");

    ImageList_DragShowNolock (FALSE);

    return TRUE;
}


/*************************************************************************
 * ImageList_InternalDragDraw [Internal]
 *
 * Draws the drag image.
 *
 * PARAMS
 *     hdc [I] device context to draw into.
 *     x   [I] X position of the drag image.
 *     y   [I] Y position of the drag image.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     The position of the drag image is relative to the window, not
 *     the client area.
 *
 */

static inline void
ImageList_InternalDragDraw (HDC hdc, INT x, INT y)
{
    IMAGELISTDRAWPARAMS imldp;

    ZeroMemory (&imldp, sizeof(imldp));
    imldp.cbSize  = sizeof(imldp);
    imldp.himl    = InternalDrag.himl;
    imldp.i       = 0;
    imldp.hdcDst  = hdc,
    imldp.x       = x;
    imldp.y       = y;
    imldp.rgbBk   = CLR_DEFAULT;
    imldp.rgbFg   = CLR_DEFAULT;
    imldp.fStyle  = ILD_NORMAL;
    imldp.fState  = ILS_ALPHA;
    imldp.Frame   = 128;

    /* FIXME: instead of using the alpha blending, we should
     * create a 50% mask, and draw it semitransparantly that way */
    ImageList_DrawIndirect (&imldp);
}

/*************************************************************************
 * ImageList_DragMove [COMCTL32.@]
 *
 * Moves the drag image.
 *
 * PARAMS
 *     x [I] X position of the drag image.
 *     y [I] Y position of the drag image.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     The position of the drag image is relative to the window, not
 *     the client area.
 *
 * BUGS
 *     The drag image should be drawn semitransparent.
 */

BOOL WINAPI
ImageList_DragMove (INT x, INT y)
{
    TRACE("(x=%d y=%d)\n", x, y);

    if (!is_valid(InternalDrag.himl))
	return FALSE;

    /* draw/update the drag image */
    if (InternalDrag.bShow) {
	HDC hdcDrag;
	HDC hdcOffScreen;
	HDC hdcBg;
	HBITMAP hbmOffScreen;
	INT origNewX, origNewY;
	INT origOldX, origOldY;
	INT origRegX, origRegY;
	INT sizeRegX, sizeRegY;


	/* calculate the update region */
	origNewX = x - InternalDrag.dxHotspot;
	origNewY = y - InternalDrag.dyHotspot;
	origOldX = InternalDrag.x - InternalDrag.dxHotspot;
	origOldY = InternalDrag.y - InternalDrag.dyHotspot;
	origRegX = min(origNewX, origOldX);
	origRegY = min(origNewY, origOldY);
	sizeRegX = InternalDrag.himl->cx + abs(x - InternalDrag.x);
	sizeRegY = InternalDrag.himl->cy + abs(y - InternalDrag.y);

	hdcDrag = GetDCEx(InternalDrag.hwnd, 0,
   			  DCX_WINDOW | DCX_CACHE | DCX_LOCKWINDOWUPDATE);
    	hdcOffScreen = CreateCompatibleDC(hdcDrag);
    	hdcBg = CreateCompatibleDC(hdcDrag);

	hbmOffScreen = CreateCompatibleBitmap(hdcDrag, sizeRegX, sizeRegY);
	SelectObject(hdcOffScreen, hbmOffScreen);
	SelectObject(hdcBg, InternalDrag.hbmBg);

	/* get the actual background of the update region */
	BitBlt(hdcOffScreen, 0, 0, sizeRegX, sizeRegY, hdcDrag,
	       origRegX, origRegY, SRCCOPY);
	/* erase the old image */
	BitBlt(hdcOffScreen, origOldX - origRegX, origOldY - origRegY,
	       InternalDrag.himl->cx, InternalDrag.himl->cy, hdcBg, 0, 0,
	       SRCCOPY);
	/* save the background */
	BitBlt(hdcBg, 0, 0, InternalDrag.himl->cx, InternalDrag.himl->cy,