rebar.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

 * to unminimize a minimized band so we search for a band that is big enough.
 * For some reason "big enough" is defined as bigger than the minimum size of the
 * first band in the row
 */
static REBAR_BAND *REBAR_FindBandToGrow(const REBAR_INFO *infoPtr, INT iBeginBand, INT iEndBand)
{
    INT iLcx = 0, i;

    iLcx = infoPtr->bands[iBeginBand].lcx;

    for (i = prev_band(infoPtr, iEndBand); i >= iBeginBand; i = prev_band(infoPtr, i))
        if (infoPtr->bands[i].cxEffective > iLcx && !(infoPtr->bands[i].fStyle&RBBS_FIXEDSIZE))
            break;

    if (i < iBeginBand)
        for (i = prev_band(infoPtr, iEndBand); i >= iBeginBand; i = prev_band(infoPtr, i))
            if (infoPtr->bands[i].lcx == iLcx)
                break;

    TRACE("Extra space for row [%d..%d) should be added to band %d\n", iBeginBand, iEndBand, i);
    return &infoPtr->bands[i];
}

static int REBAR_ShrinkBandsRTL(const REBAR_INFO *infoPtr, INT iBeginBand, INT iEndBand, INT cxShrink, BOOL bEnforce)
{
    REBAR_BAND *lpBand;
    INT width, i;

    TRACE("Shrinking bands [%d..%d) by %d, right-to-left\n", iBeginBand, iEndBand, cxShrink);
    for (i = prev_band(infoPtr, iEndBand); i >= iBeginBand; i = prev_band(infoPtr, i))
    {
        lpBand = &infoPtr->bands[i];

        width = max(lpBand->cxEffective - cxShrink, (int)lpBand->lcx);
        cxShrink -= lpBand->cxEffective - width;
        lpBand->cxEffective = width;
        if (bEnforce && lpBand->cx > lpBand->cxEffective)
            lpBand->cx = lpBand->cxEffective;
        if (cxShrink == 0)
            break;
    }
    return cxShrink;
}


static int REBAR_ShrinkBandsLTR(const REBAR_INFO *infoPtr, INT iBeginBand, INT iEndBand, INT cxShrink, BOOL bEnforce)
{
    REBAR_BAND *lpBand;
    INT width, i;

    TRACE("Shrinking bands [%d..%d) by %d, left-to-right\n", iBeginBand, iEndBand, cxShrink);
    for (i = iBeginBand; i < iEndBand; i = next_band(infoPtr, i))
    {
        lpBand = &infoPtr->bands[i];

        width = max(lpBand->cxEffective - cxShrink, (int)lpBand->lcx);
        cxShrink -= lpBand->cxEffective - width;
        lpBand->cxEffective = width;
        if (bEnforce)
            lpBand->cx = lpBand->cxEffective;
        if (cxShrink == 0)
            break;
    }
    return cxShrink;
}

static int REBAR_SetBandsHeight(const REBAR_INFO *infoPtr, INT iBeginBand, INT iEndBand, INT yStart)
{
    REBAR_BAND *lpBand;
    int yMaxHeight = 0;
    int yPos = yStart;
    int row = infoPtr->bands[iBeginBand].iRow;
    int i;
    for (i = iBeginBand; i < iEndBand; i = next_band(infoPtr, i))
    {
        lpBand = &infoPtr->bands[i];
        yMaxHeight = max(yMaxHeight, lpBand->lcy);
    }
    TRACE("Bands [%d; %d) height: %d\n", iBeginBand, iEndBand, yMaxHeight);

    for (i = iBeginBand; i < iEndBand; i = next_band(infoPtr, i))
    {
        lpBand = &infoPtr->bands[i];
        /* we may be called for multiple rows if RBS_VARHEIGHT not set */
        if (lpBand->iRow != row) {
            yPos += yMaxHeight + SEP_WIDTH;
            row = lpBand->iRow;
        }

        if (lpBand->rcBand.top != yPos || lpBand->rcBand.bottom != yPos + yMaxHeight) {
            lpBand->fDraw |= NTF_INVALIDATE;
            lpBand->rcBand.top = yPos;
            lpBand->rcBand.bottom = yPos + yMaxHeight;
            TRACE("Band %d: %s\n", i, wine_dbgstr_rect(&lpBand->rcBand));
        }
    }
    return yPos + yMaxHeight;
}

static void REBAR_LayoutRow(const REBAR_INFO *infoPtr, int iBeginBand, int iEndBand, int cx, int *piRow, int *pyPos)
{
    REBAR_BAND *lpBand;
    int i, extra;
    int width = 0;

    TRACE("Adjusting row [%d;%d). Width: %d\n", iBeginBand, iEndBand, cx);
    for (i = iBeginBand; i < iEndBand; i++)
        infoPtr->bands[i].iRow = *piRow;

    /* compute the extra space */
    for (i = iBeginBand; i < iEndBand; i = next_band(infoPtr, i))
    {
        lpBand = &infoPtr->bands[i];
        if (i > iBeginBand)
            width += SEP_WIDTH;
        lpBand->cxEffective = max(lpBand->lcx, lpBand->cx);
        width += lpBand->cxEffective;
    }

    extra = cx - width;
    TRACE("Extra space: %d\n", extra);
    if (extra < 0) {
        int ret = REBAR_ShrinkBandsRTL(infoPtr, iBeginBand, iEndBand, -extra, FALSE);
        if (ret > 0 && next_band(infoPtr, iBeginBand) != iEndBand)  /* one band may be longer than expected... */
            ERR("Error layouting row %d - couldn't shrink for %d pixels (%d total shrink)\n", *piRow, ret, -extra);
    } else
    if (extra > 0) {
        lpBand = REBAR_FindBandToGrow(infoPtr, iBeginBand, iEndBand);
        lpBand->cxEffective += extra;
    }

    REBAR_SetRowRectsX(infoPtr, iBeginBand, iEndBand);
    if (infoPtr->dwStyle & RBS_VARHEIGHT)
    {
        if (*piRow > 0)
            *pyPos += SEP_WIDTH;
        *pyPos = REBAR_SetBandsHeight(infoPtr, iBeginBand, iEndBand, *pyPos);
    }
    (*piRow)++;
}

static VOID
REBAR_Layout(REBAR_INFO *infoPtr, const RECT *lpRect)
{
    REBAR_BAND *lpBand;
    RECT rcAdj;
    SIZE oldSize;
    INT adjcx, adjcy, i;
    INT rowstart = 0;
    INT row = 0;
    INT xMin, yPos;
    INT cyTarget;
    const INT yInit = 0;

    cyTarget = 0;
    if (lpRect) {
        rcAdj = *lpRect;
        cyTarget = get_rect_cy(infoPtr, lpRect);
    } else if (infoPtr->dwStyle & (CCS_NORESIZE | CCS_NOPARENTALIGN) || GetParent(infoPtr->hwndSelf) == NULL)
        GetClientRect(infoPtr->hwndSelf, &rcAdj);
    else
        GetClientRect(GetParent(infoPtr->hwndSelf), &rcAdj);
    TRACE("adjustment rect is (%d,%d)-(%d,%d)\n", rcAdj.left, rcAdj.top, rcAdj.right, rcAdj.bottom);

    adjcx = get_rect_cx(infoPtr, &rcAdj);
    adjcy = get_rect_cy(infoPtr, &rcAdj);

    if (infoPtr->uNumBands == 0) {
        TRACE("No bands - setting size to (0,%d), vert: %lx\n", adjcx, infoPtr->dwStyle & CCS_VERT);
        infoPtr->calcSize.cx = adjcx;
        /* the calcSize.cy won't change for a 0 band rebar */
        infoPtr->uNumRows = 0;
        REBAR_ForceResize(infoPtr);
        return;
    }

    yPos = yInit;
    xMin = 0;
    /* divide rows */
    i = 0;
    for (i = 0; i < infoPtr->uNumBands; i++)
    {
        lpBand = &infoPtr->bands[i];
        if (HIDDENBAND(lpBand)) continue;

        if (i > rowstart && (lpBand->fStyle & RBBS_BREAK || xMin + lpBand->lcx > adjcx)) {
            TRACE("%s break on band %d\n", (lpBand->fStyle & RBBS_BREAK ? "Hard" : "Soft"), i - 1);
            REBAR_LayoutRow(infoPtr, rowstart, i, adjcx, &row, &yPos);
            rowstart = i;
            xMin = 0;
        }
        else
            xMin += SEP_WIDTH;

        xMin += lpBand->lcx;
    }
    REBAR_LayoutRow(infoPtr, rowstart, infoPtr->uNumBands, adjcx, &row, &yPos);

    if (!(infoPtr->dwStyle & RBS_VARHEIGHT))
        yPos = REBAR_SetBandsHeight(infoPtr, 0, infoPtr->uNumBands, yInit);

    infoPtr->uNumRows = row;

    if (infoPtr->dwStyle & CCS_VERT)
        REBAR_CalcVertBand(infoPtr, 0, infoPtr->uNumBands);
    else
        REBAR_CalcHorzBand(infoPtr, 0, infoPtr->uNumBands);
    /* now compute size of Rebar itself */
    oldSize = infoPtr->calcSize;

    infoPtr->calcSize.cx = adjcx;
    infoPtr->calcSize.cy = yPos;
    TRACE("calcsize size=(%d, %d), origheight=(%d,%d)\n",
            infoPtr->calcSize.cx, infoPtr->calcSize.cy,
	    oldSize.cx, oldSize.cy);

    REBAR_DumpBand (infoPtr);
    REBAR_MoveChildWindows (infoPtr, 0, infoPtr->uNumBands);
    REBAR_ForceResize (infoPtr);

    /* note: after a RBN_HEIGHTCHANGE native sends once again all the RBN_CHILDSIZE
     * and does another ForceResize */
    if (oldSize.cy != infoPtr->calcSize.cy)
    {
        NMHDR heightchange;
        REBAR_Notify(&heightchange, infoPtr, RBN_HEIGHTCHANGE);
    }
}


static VOID
REBAR_ValidateBand (const REBAR_INFO *infoPtr, REBAR_BAND *lpBand)
     /* Function:  This routine evaluates the band specs supplied */
     /*  by the user and updates the following 5 fields in        */
     /*  the internal band structure: cxHeader, lcx, lcy, hcx, hcy*/
{
    UINT header=0;
    UINT textheight=0;
    UINT i, nonfixed;
    REBAR_BAND *tBand;

    lpBand->fStatus = 0;
    lpBand->lcx = 0;
    lpBand->lcy = 0;

    /* Data coming in from users into the cx... and cy... fields   */
    /* may be bad, just garbage, because the user never clears     */
    /* the fields. RB_{SET|INSERT}BAND{A|W} just passes the data   */
    /* along if the fields exist in the input area. Here we must   */
    /* determine if the data is valid. I have no idea how MS does  */
    /* the validation, but it does because the RB_GETBANDINFO      */
    /* returns a 0 when I know the sample program passed in an     */
    /* address. Here I will use the algorithm that if the value    */
    /* is greater than 65535 then it is bad and replace it with    */
    /* a zero. Feel free to improve the algorithm.  -  GA 12/2000  */
    if (lpBand->cxMinChild > 65535) lpBand->cxMinChild = 0;
    if (lpBand->cyMinChild > 65535) lpBand->cyMinChild = 0;
    if (lpBand->cx         > 65535) lpBand->cx         = 0;
    if (lpBand->cyChild    > 65535) lpBand->cyChild    = 0;
    if (lpBand->cyIntegral > 65535) lpBand->cyIntegral = 0;
    if (lpBand->cxIdeal    > 65535) lpBand->cxIdeal    = 0;
    if (lpBand->cxHeader   > 65535) lpBand->cxHeader   = 0;

    /* TODO : we could try return to the caller if a value changed so that */
    /*        a REBAR_Layout is needed. Till now the caller should call it */
    /*        it always (we should also check what native does)            */

    /* Header is where the image, text and gripper exist  */
    /* in the band and precede the child window.          */

    /* count number of non-FIXEDSIZE and non-Hidden bands */
    nonfixed = 0;
    for (i=0; i<infoPtr->uNumBands; i++){
	tBand = &infoPtr->bands[i];
	if (!HIDDENBAND(tBand) && !(tBand->fStyle & RBBS_FIXEDSIZE))
	    nonfixed++;
    }

    /* calculate gripper rectangle */
    if (  (!(lpBand->fStyle & RBBS_NOGRIPPER)) &&
	  ( (lpBand->fStyle & RBBS_GRIPPERALWAYS) ||
	    ( !(lpBand->fStyle & RBBS_FIXEDSIZE) && (nonfixed > 1)))
       ) {
	lpBand->fStatus |= HAS_GRIPPER;
        if (infoPtr->dwStyle & CCS_VERT)
	    if (infoPtr->dwStyle & RBS_VERTICALGRIPPER)
                header += (GRIPPER_HEIGHT + REBAR_PRE_GRIPPER);
            else
	        header += (GRIPPER_WIDTH + REBAR_PRE_GRIPPER);
        else
            header += (REBAR_PRE_GRIPPER + GRIPPER_WIDTH);
        /* Always have 4 pixels before anything else */
        header += REBAR_ALWAYS_SPACE;
    }

    /* image is visible */
    if ((lpBand->fMask & RBBIM_IMAGE) && (infoPtr->himl)) {
	lpBand->fStatus |= HAS_IMAGE;
        if (infoPtr->dwStyle & CCS_VERT) {
	   header += (infoPtr->imageSize.cy + REBAR_POST_IMAGE);
	   lpBand->lcy = infoPtr->imageSize.cx + 2;
	}
	else {
	   header += (infoPtr->imageSize.cx + REBAR_POST_IMAGE);
	   lpBand->lcy = infoPtr->imageSize.cy + 2;
	}
    }

    /* text is visible */
    if ((lpBand->fMask & RBBIM_TEXT) && (lpBand->lpText) &&
        !(lpBand->fStyle & RBBS_HIDETITLE)) {
	HDC hdc = GetDC (0);
	HFONT hOldFont = SelectObject (hdc, infoPtr->hFont);
	SIZE size;

	lpBand->fStatus |= HAS_TEXT;
	GetTextExtentPoint32W (hdc, lpBand->lpText,
			       lstrlenW (lpBand->lpText), &size);
	header += ((infoPtr->dwStyle & CCS_VERT) ? (size.cy + REBAR_POST_TEXT) : (size.cx + REBAR_POST_TEXT));
	textheight = (infoPtr->dwStyle & CCS_VERT) ? 0 : size.cy;

	SelectObject (hdc, hOldFont);
	ReleaseDC (0, hdc);
    }

    /* if no gripper but either image or text, then leave space */
    if ((lpBand->fStatus & (HAS_IMAGE | HAS_TEXT)) &&
	!(lpBand->fStatus & HAS_GRIPPER)) {
	header += REBAR_ALWAYS_SPACE;
    }

    /* check if user overrode the header value */
    if (!(lpBand->fStyle & RBBS_UNDOC_FIXEDHEADER))
        lpBand->cxHeader = header;


    /* Now compute minimum size of child window */
    lpBand->lcy = textheight;
    if (lpBand->hwndChild != NULL) {
	/* Set the .cy values for CHILDSIZE case */
        lpBand->lcy = max(lpBand->lcy, lpBand->cyChild + REBARSPACE(lpBand));
        TRACE("_CHILDSIZE\n");
    }
    else
        lpBand->lcy = max(lpBand->lcy, REBAR_NO_CHILD_HEIGHT);

    lpBand->lcx = lpBand->cxMinChild + lpBand->cxHeader + REBAR_POST_CHILD;
    if (lpBand->fStyle & RBBS_USECHEVRON && lpBand->cxMinChild < lpBand->cxIdeal)
        lpBand->lcx += CHEVRON_WIDTH;
}

static BOOL
REBAR_CommonSetupBand(HWND hwnd, const REBARBANDINFOW *lprbbi, REBAR_BAND *lpBand)
     /* Function:  This routine copies the supplied values from   */
     /*  user input (lprbbi) to the internal band structure.      */
     /*  It returns true if something changed and false if not.   */
{
    BOOL bChanged = FALSE;

    lpBand->fMask |= lprbbi->fMask;

    if( (lprbbi->fMask & RBBIM_STYLE) &&
        (lpBand->fStyle != lprbbi->fStyle ) )
    {
	lpBand->fStyle = lprbbi->fStyle;
        bChanged = TRUE;
    }

    if( (lprbbi->fMask & RBBIM_COLORS) &&
       ( ( lpBand->clrFore != lprbbi->clrFore ) ||
         ( lpBand->clrBack != lprbbi->clrBack ) ) )
    {
	lpBand->clrFore = lprbbi->clrFore;
	lpBand->clrBack = lprbbi->clrBack;
        bChanged = TRUE;
    }

    if( (lprbbi->fMask & RBBIM_IMAGE) &&
       ( lpBand->iImage != lprbbi->iImage ) )
    {
	lpBand->iImage = lprbbi->iImage;
        bChanged = TRUE;
    }

    if( (lprbbi->fMask & RBBIM_CHILD) &&
       (lprbbi->hwndChild != lpBand->hwndChild ) )