listview.c

winNT技术操作系统,国外开放的原代码和LIUX一样

        } else if ( (charCode != 0) && (nItem == -1) && (nItem != infoPtr->nFocusedItem) &&
                    (lstrncmpiW(item.pszText,infoPtr->szSearchParam,1) == 0) ) {
            /* This would work but we must keep looking for a longer match */
            nItem=idx;
        }
        idx++;
    } while (idx != endidx);

    if (nItem != -1)
        LISTVIEW_KeySelection(infoPtr, nItem);

    return 0;
}

/*************************************************************************
 * LISTVIEW_UpdateHeaderSize [Internal]
 *
 * Function to resize the header control
 *
 * PARAMS
 * [I]  hwnd : handle to a window
 * [I]  nNewScrollPos : scroll pos to set
 *
 * RETURNS
 * None.
 */
static void LISTVIEW_UpdateHeaderSize(LISTVIEW_INFO *infoPtr, INT nNewScrollPos)
{
    RECT winRect;
    POINT point[2];

    TRACE("nNewScrollPos=%d\n", nNewScrollPos);

    GetWindowRect(infoPtr->hwndHeader, &winRect);
    point[0].x = winRect.left;
    point[0].y = winRect.top;
    point[1].x = winRect.right;
    point[1].y = winRect.bottom;

    MapWindowPoints(HWND_DESKTOP, infoPtr->hwndSelf, point, 2);
    point[0].x = -nNewScrollPos;
    point[1].x += nNewScrollPos;

    SetWindowPos(infoPtr->hwndHeader,0,
        point[0].x,point[0].y,point[1].x,point[1].y,
        SWP_NOZORDER | SWP_NOACTIVATE);
}

/***
 * DESCRIPTION:
 * Update the scrollbars. This functions should be called whenever
 * the content, size or view changes.
 *
 * PARAMETER(S):
 * [I] infoPtr : valid pointer to the listview structure
 *
 * RETURN:
 * None
 */
static void LISTVIEW_UpdateScroll(LISTVIEW_INFO *infoPtr)
{
    UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
    SCROLLINFO horzInfo, vertInfo;
    INT dx, dy;

    if ((infoPtr->dwStyle & LVS_NOSCROLL) || !is_redrawing(infoPtr)) return;

    ZeroMemory(&horzInfo, sizeof(SCROLLINFO));
    horzInfo.cbSize = sizeof(SCROLLINFO);
    horzInfo.nPage = infoPtr->rcList.right - infoPtr->rcList.left;

    /* for now, we'll set info.nMax to the _count_, and adjust it later */
    if (uView == LVS_LIST)
    {
	INT nPerCol = LISTVIEW_GetCountPerColumn(infoPtr);
	horzInfo.nMax = (infoPtr->nItemCount + nPerCol - 1) / nPerCol;

	/* scroll by at least one column per page */
	if(horzInfo.nPage < infoPtr->nItemWidth)
		horzInfo.nPage = infoPtr->nItemWidth;

	horzInfo.nPage /= infoPtr->nItemWidth;
    }
    else if (uView == LVS_REPORT)
    {
	horzInfo.nMax = infoPtr->nItemWidth;
    }
    else /* LVS_ICON, or LVS_SMALLICON */
    {
	RECT rcView;

	if (LISTVIEW_GetViewRect(infoPtr, &rcView)) horzInfo.nMax = rcView.right - rcView.left;
    }
  
    horzInfo.fMask = SIF_RANGE | SIF_PAGE;
    horzInfo.nMax = max(horzInfo.nMax - 1, 0);
    dx = GetScrollPos(infoPtr->hwndSelf, SB_HORZ);
    dx -= SetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &horzInfo, TRUE);
    TRACE("horzInfo=%s\n", debugscrollinfo(&horzInfo));

    /* Setting the horizontal scroll can change the listview size
     * (and potentially everything else) so we need to recompute
     * everything again for the vertical scroll
     */

    ZeroMemory(&vertInfo, sizeof(SCROLLINFO));
    vertInfo.cbSize = sizeof(SCROLLINFO);
    vertInfo.nPage = infoPtr->rcList.bottom - infoPtr->rcList.top;

    if (uView == LVS_REPORT)
    {
	vertInfo.nMax = infoPtr->nItemCount;
	
	/* scroll by at least one page */
	if(vertInfo.nPage < infoPtr->nItemHeight)
	  vertInfo.nPage = infoPtr->nItemHeight;

	vertInfo.nPage /= infoPtr->nItemHeight;
    }
    else if (uView != LVS_LIST) /* LVS_ICON, or LVS_SMALLICON */
    {
	RECT rcView;

	if (LISTVIEW_GetViewRect(infoPtr, &rcView)) vertInfo.nMax = rcView.bottom - rcView.top;
    }

    vertInfo.fMask = SIF_RANGE | SIF_PAGE;
    vertInfo.nMax = max(vertInfo.nMax - 1, 0);
    dy = GetScrollPos(infoPtr->hwndSelf, SB_VERT);
    dy -= SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &vertInfo, TRUE);
    TRACE("vertInfo=%s\n", debugscrollinfo(&vertInfo));

    /* Change of the range may have changed the scroll pos. If so move the content */
    if (dx != 0 || dy != 0)
    {
        RECT listRect;
        listRect = infoPtr->rcList;
        ScrollWindowEx(infoPtr->hwndSelf, dx, dy, &listRect, &listRect, 0, 0,
            SW_ERASE | SW_INVALIDATE);
    }

    /* Update the Header Control */
    if (uView == LVS_REPORT)
    {
	horzInfo.fMask = SIF_POS;
	GetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &horzInfo);
	LISTVIEW_UpdateHeaderSize(infoPtr, horzInfo.nPos);
    }
}


/***
 * DESCRIPTION:
 * Shows/hides the focus rectangle. 
 *
 * PARAMETER(S):
 * [I] infoPtr : valid pointer to the listview structure
 * [I] fShow : TRUE to show the focus, FALSE to hide it.
 *
 * RETURN:
 * None
 */
static void LISTVIEW_ShowFocusRect(LISTVIEW_INFO *infoPtr, BOOL fShow)
{
    UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
    HDC hdc;

    TRACE("fShow=%d, nItem=%d\n", fShow, infoPtr->nFocusedItem);

    if (infoPtr->nFocusedItem < 0) return;

    /* we need some gymnastics in ICON mode to handle large items */
    if ( (infoPtr->dwStyle & LVS_TYPEMASK) == LVS_ICON )
    {
	RECT rcBox;

	LISTVIEW_GetItemBox(infoPtr, infoPtr->nFocusedItem, &rcBox); 
	if ((rcBox.bottom - rcBox.top) > infoPtr->nItemHeight)
	{
	    LISTVIEW_InvalidateRect(infoPtr, &rcBox);
	    return;
	}
    }

    if (!(hdc = GetDC(infoPtr->hwndSelf))) return;

    /* for some reason, owner draw should work only in report mode */
    if ((infoPtr->dwStyle & LVS_OWNERDRAWFIXED) && (uView == LVS_REPORT))
    {
	DRAWITEMSTRUCT dis;
	LVITEMW item;

        item.iItem = infoPtr->nFocusedItem;
	item.iSubItem = 0;
        item.mask = LVIF_PARAM;
	if (!LISTVIEW_GetItemW(infoPtr, &item)) goto done;
	   
	ZeroMemory(&dis, sizeof(dis)); 
	dis.CtlType = ODT_LISTVIEW;
	dis.CtlID = (UINT)GetWindowLongPtrW(infoPtr->hwndSelf, GWLP_ID);
	dis.itemID = item.iItem;
	dis.itemAction = ODA_FOCUS;
	if (fShow) dis.itemState |= ODS_FOCUS;
	dis.hwndItem = infoPtr->hwndSelf;
	dis.hDC = hdc;
	LISTVIEW_GetItemBox(infoPtr, dis.itemID, &dis.rcItem);
	dis.itemData = item.lParam;

	SendMessageW(infoPtr->hwndNotify, WM_DRAWITEM, dis.CtlID, (LPARAM)&dis);
    }
    else
    {
	DrawFocusRect(hdc, &infoPtr->rcFocus);
    }
done:
    ReleaseDC(infoPtr->hwndSelf, hdc);
}

/***
 * Invalidates all visible selected items.
 */
static void LISTVIEW_InvalidateSelectedItems(LISTVIEW_INFO *infoPtr)
{
    ITERATOR i; 
   
    iterator_frameditems(&i, infoPtr, &infoPtr->rcList); 
    while(iterator_next(&i))
    {
	if (LISTVIEW_GetItemState(infoPtr, i.nItem, LVIS_SELECTED))
	    LISTVIEW_InvalidateItem(infoPtr, i.nItem);
    }
    iterator_destroy(&i);
}

	    
/***
 * DESCRIPTION:            [INTERNAL]
 * Computes an item's (left,top) corner, relative to rcView.
 * That is, the position has NOT been made relative to the Origin.
 * This is deliberate, to avoid computing the Origin over, and
 * over again, when this function is call in a loop. Instead,
 * one ca factor the computation of the Origin before the loop,
 * and offset the value retured by this function, on every iteration.
 * 
 * PARAMETER(S):
 * [I] infoPtr : valid pointer to the listview structure
 * [I] nItem  : item number
 * [O] lpptOrig : item top, left corner
 *
 * RETURN:
 *   None.
 */
static void LISTVIEW_GetItemOrigin(LISTVIEW_INFO *infoPtr, INT nItem, LPPOINT lpptPosition)
{
    UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;

    assert(nItem >= 0 && nItem < infoPtr->nItemCount);

    if ((uView == LVS_SMALLICON) || (uView == LVS_ICON))
    {
	lpptPosition->x = (LONG_PTR)DPA_GetPtr(infoPtr->hdpaPosX, nItem);
	lpptPosition->y = (LONG_PTR)DPA_GetPtr(infoPtr->hdpaPosY, nItem);
    }
    else if (uView == LVS_LIST)
    {
        INT nCountPerColumn = LISTVIEW_GetCountPerColumn(infoPtr);
	lpptPosition->x = nItem / nCountPerColumn * infoPtr->nItemWidth;
	lpptPosition->y = nItem % nCountPerColumn * infoPtr->nItemHeight;
    }
    else /* LVS_REPORT */
    {
	lpptPosition->x = 0;
	lpptPosition->y = nItem * infoPtr->nItemHeight;
    }
}
    
/***
 * DESCRIPTION:            [INTERNAL]
 * Compute the rectangles of an item.  This is to localize all
 * the computations in one place. If you are not interested in some
 * of these values, simply pass in a NULL -- the fucntion is smart
 * enough to compute only what's necessary. The function computes
 * the standard rectangles (BOUNDS, ICON, LABEL) plus a non-standard
 * one, the BOX rectangle. This rectangle is very cheap to compute,
 * and is guaranteed to contain all the other rectangles. Computing
 * the ICON rect is also cheap, but all the others are potentaily
 * expensive. This gives an easy and effective optimization when
 * searching (like point inclusion, or rectangle intersection):
 * first test against the BOX, and if TRUE, test agains the desired
 * rectangle.
 * If the function does not have all the necessary information
 * to computed the requested rectangles, will crash with a
 * failed assertion. This is done so we catch all programming
 * errors, given that the function is called only from our code.
 *
 * We have the following 'special' meanings for a few fields:
 *   * If LVIS_FOCUSED is set, we assume the item has the focus
 *     This is important in ICON mode, where it might get a larger
 *     then usual rectange
 *
 * Please note that subitem support works only in REPORT mode.
 *
 * PARAMETER(S):
 * [I] infoPtr : valid pointer to the listview structure
 * [I] lpLVItem : item to compute the measures for
 * [O] lprcBox : ptr to Box rectangle
 *                The internal LVIR_BOX rectangle
 * [0] lprcState : ptr to State icon rectangle
 *  		  The internal LVIR_STATE rectangle
 * [O] lprcIcon : ptr to Icon rectangle
 *                Same as LVM_GETITEMRECT with LVIR_ICON
 * [O] lprcLabel : ptr to Label rectangle
 *                Same as LVM_GETITEMRECT with LVIR_LABEL
 *
 * RETURN:
 *   None.
 */
static void LISTVIEW_GetItemMetrics(LISTVIEW_INFO *infoPtr, const LVITEMW *lpLVItem,
				    LPRECT lprcBox, LPRECT lprcState, 
				    LPRECT lprcIcon, LPRECT lprcLabel)
{
    UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
    BOOL doState = FALSE, doIcon = FALSE, doLabel = FALSE, oversizedBox = FALSE;
    RECT Box, State, Icon, Label;
    COLUMN_INFO *lpColumnInfo = NULL;

    TRACE("(lpLVItem=%s)\n", debuglvitem_t(lpLVItem, TRUE));
	
    /* Be smart and try to figure out the minimum we have to do */
    if (lpLVItem->iSubItem) assert(uView == LVS_REPORT);
    if (uView == LVS_ICON && (lprcBox || lprcLabel))
    {
	assert((lpLVItem->mask & LVIF_STATE) && (lpLVItem->stateMask & LVIS_FOCUSED));
	if (lpLVItem->state & LVIS_FOCUSED) oversizedBox = doLabel = TRUE;
    }
    if (lprcLabel) doLabel = TRUE;
    if (doLabel || lprcIcon) doIcon = TRUE;
    if (doIcon || lprcState) doState = TRUE;
    
    /************************************************************/
    /* compute the box rectangle (it should be cheap to do)     */
    /************************************************************/
    if (lpLVItem->iSubItem || uView == LVS_REPORT)
	lpColumnInfo = LISTVIEW_GetColumnInfo(infoPtr, lpLVItem->iSubItem);

    if (lpLVItem->iSubItem)    
    {
	Box = lpColumnInfo->rcHeader;
    }
    else
    {
	Box.left = 0;
	Box.right = infoPtr->nItemWidth;
    }
    Box.top = 0;
    Box.bottom = infoPtr->nItemHeight;
		
    /************************************************************/
    /* compute STATEICON bounding box                           */
    /************************************************************/
    if (doState)
    {
	if (uView == LVS_ICON)
	{
     	    State.left = Box.left - infoPtr->iconStateSize.cx - 2;
	    if (infoPtr->himlNormal) 
		State.left += (infoPtr->nItemWidth - infoPtr->iconSize.cx) / 2;
	    State.top  = Box.top + infoPtr->iconSize.cy - infoPtr->iconStateSize.cy + 4;
	}
	else
	{
	    /* we need the ident in report mode, if we don't have it, we fail */
	    State.left = Box.left;
	    if (uView == LVS_REPORT) 
	    {
		if (lpLVItem->iSubItem == 0)
		{
		    State.left += REPORT_MARGINX;
		    assert(lpLVItem->mask & LVIF_INDENT);
		    State.left += infoPtr->iconSize.cx * lpLVItem->iIndent;
		}
	    }
	    State.top  = Box.top;
	}	
	State.right    = State.left;
	State.bottom   = State.top;
	if (infoPtr->himlState && lpLVItem->iSubItem == 0)
	{
	    State.right  += infoPtr->iconStateSize.cx;
	    State.bottom += infoPtr->iconStateSize.cy;
	}
	if (lprcState) *lprcState = State;
	TRACE("    - state=%s\n", wine_dbgstr_rect(&State));
    }
    else  S