header.c

winNT技术操作系统,国外开放的原代码和LIUX一样

    /* make space for the new item */
    memmove(&infoPtr->items[nItem + 1], &infoPtr->items[nItem],
            (infoPtr->uNumItem - nItem - 1) * sizeof(HEADER_ITEM));
    memmove(&infoPtr->order[iOrder + 1], &infoPtr->order[iOrder],
           (infoPtr->uNumItem - iOrder - 1) * sizeof(INT));

    /* update the order array */
    infoPtr->order[iOrder] = nItem;
    for (i = 0; i < infoPtr->uNumItem; i++)
    {
        if (i != iOrder && infoPtr->order[i] >= nItem)
            infoPtr->order[i]++;
        infoPtr->items[infoPtr->order[i]].iOrder = i;
    }

    lpItem = &infoPtr->items[nItem];
    ZeroMemory(lpItem, sizeof(HEADER_ITEM));
    /* cxy, fmt and lParam are copied even if not in the HDITEM mask */
    copyMask = phdi->mask | HDI_WIDTH | HDI_FORMAT | HDI_LPARAM;
    HEADER_StoreHDItemInHeader(lpItem, copyMask, phdi, bUnicode);
    lpItem->iOrder = iOrder;

    /* set automatically some format bits */
    if (phdi->mask & HDI_TEXT)
        lpItem->fmt |= HDF_STRING;
    else
        lpItem->fmt &= ~HDF_STRING;

    if (lpItem->hbm != NULL)
        lpItem->fmt |= HDF_BITMAP;
    else
        lpItem->fmt &= ~HDF_BITMAP;

    if (phdi->mask & HDI_IMAGE)
        lpItem->fmt |= HDF_IMAGE;

    HEADER_SetItemBounds (hwnd);
    InvalidateRect(hwnd, NULL, FALSE);

    return nItem;
}


static LRESULT
HEADER_Layout (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    LPHDLAYOUT lpLayout = (LPHDLAYOUT)lParam;

    lpLayout->pwpos->hwnd = hwnd;
    lpLayout->pwpos->hwndInsertAfter = 0;
    lpLayout->pwpos->x = lpLayout->prc->left;
    lpLayout->pwpos->y = lpLayout->prc->top;
    lpLayout->pwpos->cx = lpLayout->prc->right - lpLayout->prc->left;
    if (GetWindowLongW (hwnd, GWL_STYLE) & HDS_HIDDEN)
        lpLayout->pwpos->cy = 0;
    else {
        lpLayout->pwpos->cy = infoPtr->nHeight;
        lpLayout->prc->top += infoPtr->nHeight;
    }
    lpLayout->pwpos->flags = SWP_NOZORDER;

    TRACE("Layout x=%d y=%d cx=%d cy=%d\n",
           lpLayout->pwpos->x, lpLayout->pwpos->y,
           lpLayout->pwpos->cx, lpLayout->pwpos->cy);

    infoPtr->bRectsValid = FALSE;

    return TRUE;
}


static LRESULT
HEADER_SetImageList (HWND hwnd, HIMAGELIST himl)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    HIMAGELIST himlOld;

    TRACE("(himl %p)\n", himl);
    himlOld = infoPtr->himl;
    infoPtr->himl = himl;

    /* FIXME: Refresh needed??? */

    return (LRESULT)himlOld;
}


static LRESULT
HEADER_GetBitmapMargin(HWND hwnd)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr(hwnd);
    
    return infoPtr->iMargin;
}

static LRESULT
HEADER_SetBitmapMargin(HWND hwnd, WPARAM wParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    INT oldMargin = infoPtr->iMargin;

    infoPtr->iMargin = (INT)wParam;

    return oldMargin;
}

static LRESULT
HEADER_SetItemT (HWND hwnd, INT nItem, LPHDITEMW phdi, BOOL bUnicode)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    HEADER_ITEM *lpItem;
    HDITEMW hdNotify;
    void *pvScratch;

    if (phdi == NULL)
	return FALSE;
    if ((nItem < 0) || (nItem >= (INT)infoPtr->uNumItem))
        return FALSE;

    TRACE("[nItem=%d]\n", nItem);

    HEADER_CopyHDItemForNotify(infoPtr, &hdNotify, phdi, bUnicode, &pvScratch);
    if (HEADER_SendNotifyWithHDItemT(hwnd, HDN_ITEMCHANGINGW, nItem, &hdNotify))
    {
        if (pvScratch) Free(pvScratch);
	return FALSE;
    }

    lpItem = &infoPtr->items[nItem];
    HEADER_StoreHDItemInHeader(lpItem, phdi->mask, phdi, bUnicode);

    if (phdi->mask & HDI_ORDER)
        if (phdi->iOrder >= 0 && phdi->iOrder < infoPtr->uNumItem)
            HEADER_ChangeItemOrder(infoPtr, nItem, phdi->iOrder);

    HEADER_SendNotifyWithHDItemT(hwnd, HDN_ITEMCHANGEDW, nItem, &hdNotify);

    HEADER_SetItemBounds (hwnd);

    InvalidateRect(hwnd, NULL, FALSE);

    if (pvScratch != NULL)
        Free(pvScratch);
    return TRUE;
}

inline static LRESULT
HEADER_SetUnicodeFormat (HWND hwnd, WPARAM wParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    BOOL bTemp = (infoPtr->nNotifyFormat == NFR_UNICODE);

    infoPtr->nNotifyFormat = ((BOOL)wParam ? NFR_UNICODE : NFR_ANSI);

    return bTemp;
}


static LRESULT
HEADER_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr;
    TEXTMETRICW tm;
    HFONT hOldFont;
    HDC   hdc;

    infoPtr = (HEADER_INFO *)Alloc (sizeof(HEADER_INFO));
    SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);

    infoPtr->hwndNotify = ((LPCREATESTRUCTA)lParam)->hwndParent;
    infoPtr->uNumItem = 0;
    infoPtr->hFont = 0;
    infoPtr->items = 0;
    infoPtr->order = 0;
    infoPtr->bRectsValid = FALSE;
    infoPtr->hcurArrow = LoadCursorW (0, (LPWSTR)IDC_ARROW);
    infoPtr->hcurDivider = LoadCursorW (COMCTL32_hModule, MAKEINTRESOURCEW(IDC_DIVIDER));
    infoPtr->hcurDivopen = LoadCursorW (COMCTL32_hModule, MAKEINTRESOURCEW(IDC_DIVIDEROPEN));
    infoPtr->bPressed  = FALSE;
    infoPtr->bTracking = FALSE;
    infoPtr->iMoveItem = 0;
    infoPtr->himl = 0;
    infoPtr->iHotItem = -1;
    infoPtr->iHotDivider = -1;
    infoPtr->iMargin = 3*GetSystemMetrics(SM_CXEDGE);
    infoPtr->nNotifyFormat =
	SendMessageW (infoPtr->hwndNotify, WM_NOTIFYFORMAT, (WPARAM)hwnd, NF_QUERY);

    hdc = GetDC (0);
    hOldFont = SelectObject (hdc, GetStockObject (SYSTEM_FONT));
    GetTextMetricsW (hdc, &tm);
    infoPtr->nHeight = tm.tmHeight + VERT_BORDER;
    SelectObject (hdc, hOldFont);
    ReleaseDC (0, hdc);

    OpenThemeData(hwnd, themeClass);

    return 0;
}


static LRESULT
HEADER_Destroy (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    HEADER_ITEM *lpItem;
    INT nItem;
    HTHEME theme;

    if (infoPtr->items) {
        lpItem = infoPtr->items;
        for (nItem = 0; nItem < infoPtr->uNumItem; nItem++, lpItem++) {
            HEADER_DisposeItem(lpItem);
        }
        Free (infoPtr->items);
    }

    if (infoPtr->order)
        Free(infoPtr->order);

    if (infoPtr->himl)
	ImageList_Destroy (infoPtr->himl);

    SetWindowLongPtrW (hwnd, 0, 0);
    Free (infoPtr);

    theme = GetWindowTheme(hwnd);
    CloseThemeData(theme);
    return 0;
}


static inline LRESULT
HEADER_GetFont (HWND hwnd)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);

    return (LRESULT)infoPtr->hFont;
}


static BOOL
HEADER_IsDragDistance(HEADER_INFO *infoPtr, POINT *pt)
{
    /* Windows allows for a mouse movement before starting the drag. We use the
     * SM_CXDOUBLECLICK/SM_CYDOUBLECLICK as that distance.
     */
    return (abs(infoPtr->ptLButtonDown.x - pt->x)>GetSystemMetrics(SM_CXDOUBLECLK) ||
            abs(infoPtr->ptLButtonDown.y - pt->y)>GetSystemMetrics(SM_CYDOUBLECLK));
}

static LRESULT
HEADER_LButtonDblClk (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    POINT pt;
    UINT  flags;
    INT   nItem;

    pt.x = (short)LOWORD(lParam);
    pt.y = (short)HIWORD(lParam);
    HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);

    if ((GetWindowLongW (hwnd, GWL_STYLE) & HDS_BUTTONS) && (flags == HHT_ONHEADER))
        HEADER_SendNotifyWithHDItemT(hwnd, HDN_ITEMDBLCLICKW, nItem, NULL);
    else if ((flags == HHT_ONDIVIDER) || (flags == HHT_ONDIVOPEN))
        HEADER_SendNotifyWithHDItemT(hwnd, HDN_DIVIDERDBLCLICKW, nItem, NULL);

    return 0;
}


static LRESULT
HEADER_LButtonDown (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
    POINT pt;
    UINT  flags;
    INT   nItem;
    HDC   hdc;

    pt.x = (short)LOWORD(lParam);
    pt.y = (short)HIWORD(lParam);
    HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);

    if ((dwStyle & HDS_BUTTONS) && (flags == HHT_ONHEADER)) {
	SetCapture (hwnd);
	infoPtr->bCaptured = TRUE;
	infoPtr->bPressed  = TRUE;
	infoPtr->bDragging = FALSE;
	infoPtr->iMoveItem = nItem;
	infoPtr->ptLButtonDown = pt;

	infoPtr->items[nItem].bDown = TRUE;

	/* Send WM_CUSTOMDRAW */
	hdc = GetDC (hwnd);
	HEADER_RefreshItem (hwnd, hdc, nItem);
	ReleaseDC (hwnd, hdc);

	TRACE("Pressed item %d!\n", nItem);
    }
    else if ((flags == HHT_ONDIVIDER) || (flags == HHT_ONDIVOPEN)) {
        INT iCurrWidth = infoPtr->items[nItem].cxy;
        if (!HEADER_SendNotifyWithIntFieldT(hwnd, HDN_BEGINTRACKW, nItem, HDI_WIDTH, iCurrWidth))
        {
	    SetCapture (hwnd);
	    infoPtr->bCaptured = TRUE;
	    infoPtr->bTracking = TRUE;
	    infoPtr->iMoveItem = nItem;
	    infoPtr->xTrackOffset = infoPtr->items[nItem].rect.right - pt.x;

	    if (!(dwStyle & HDS_FULLDRAG)) {
		infoPtr->xOldTrack = infoPtr->items[nItem].rect.right;
		hdc = GetDC (hwnd);
		HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
		ReleaseDC (hwnd, hdc);
	    }

	    TRACE("Begin tracking item %d!\n", nItem);
	}
    }

    return 0;
}


static LRESULT
HEADER_LButtonUp (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
    POINT pt;
    UINT  flags;
    INT   nItem;
    HDC   hdc;

    pt.x = (INT)(SHORT)LOWORD(lParam);
    pt.y = (INT)(SHORT)HIWORD(lParam);
    HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);

    if (infoPtr->bPressed) {
	if (infoPtr->bDragging)
	{
            HEADER_ITEM *lpItem = &infoPtr->items[infoPtr->iMoveItem];
            INT iNewOrder;
            
	    ImageList_DragShowNolock(FALSE);
	    ImageList_EndDrag();
            lpItem->bDown=FALSE;
            
            if (infoPtr->iHotDivider == -1)
                iNewOrder = -1;
            else if (infoPtr->iHotDivider == infoPtr->uNumItem)
                iNewOrder = infoPtr->uNumItem-1;
            else
	    {
                iNewOrder = HEADER_IndexToOrder(hwnd, infoPtr->iHotDivider);
                if (iNewOrder > lpItem->iOrder)
                    iNewOrder--;
            }

            if (iNewOrder != -1 &&
                !HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ENDDRAG, infoPtr->iMoveItem, HDI_ORDER, iNewOrder))
            {
                HEADER_ChangeItemOrder(infoPtr, infoPtr->iMoveItem, iNewOrder);
		infoPtr->bRectsValid = FALSE;
		InvalidateRect(hwnd, NULL, FALSE);
	    }
	    else
		InvalidateRect(hwnd, &infoPtr->items[infoPtr->iMoveItem].rect, FALSE);
                
            HEADER_SetHotDivider(hwnd, FALSE, -1);
	}
	else if (!(dwStyle&HDS_DRAGDROP) || !HEADER_IsDragDistance(infoPtr, &pt))
	{
	    infoPtr->items[infoPtr->iMoveItem].bDown = FALSE;
	    hdc = GetDC (hwnd);
	    HEADER_RefreshItem (hwnd, hdc, infoPtr->iMoveItem);
	    ReleaseDC (hwnd, hdc);

	    HEADER_SendNotifyWithHDItemT(hwnd, HDN_ITEMCLICKW, infoPtr->iMoveItem, NULL);
	}

	TRACE("Released item %d!\n", infoPtr->iMoveItem);
	infoPtr->bPressed = FALSE;
    }
    else if (infoPtr->bTracking) {
        INT iNewWidth = pt.x - infoPtr->items[infoPtr->iMoveItem].rect.left + infoPtr->xTrackOffset;
        if (iNewWidth < 0)
	    iNewWidth = 0;
	TRACE("End tracking item %d!\n", infoPtr->iMoveItem);
	infoPtr->bTracking = FALSE;

        HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ENDTRACKW, infoPtr->iMoveItem, HDI_WIDTH, iNewWidth);

        if (!(dwStyle & HDS_FULLDRAG)) {
	    hdc = GetDC (hwnd);
	    HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
            ReleaseDC (hwnd, hdc);
        }
          
        if (!HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ITEMCHANGINGW, infoPtr->iMoveItem, HDI_WIDTH, iNewWidth))
        {
            infoPtr->items[infoPtr->iMoveItem].cxy = iNewWidth;
            HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ITEMCHANGEDW, infoPtr->iMoveItem, HDI_WIDTH, iNewWidth);
        }

	HEADER_SetItemBounds (hwnd);
	InvalidateRect(hwnd, NULL, TRUE);
    }

    if (infoPtr->bCaptured) {
	infoPtr->bCaptured = FALSE;
	ReleaseCapture ();
	HEADER_SendSimpleNotify (hwnd, NM_RELEASEDCAPTURE);
    }

    return 0;
}


static LRESULT
HEADER_NotifyFormat (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);

    switch (lParam)
    {
	case NF_QUERY:
	    return infoPtr->nNotifyFormat;