header.c

winNT技术操作系统,国外开放的原代码和LIUX一样

	case NF_REQUERY:
	    infoPtr->nNotifyFormat =
		SendMessageW ((HWND)wParam, WM_NOTIFYFORMAT,
			      (WPARAM)hwnd, (LPARAM)NF_QUERY);
	    return infoPtr->nNotifyFormat;
    }

    return 0;
}

static LRESULT
HEADER_MouseLeave (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    /* Reset hot-tracked item when mouse leaves control. */
    INT oldHotItem = infoPtr->iHotItem;
    HDC hdc = GetDC (hwnd);

    infoPtr->iHotItem = -1;
    if (oldHotItem != -1) HEADER_RefreshItem (hwnd, hdc, oldHotItem);
    ReleaseDC (hwnd, hdc);

    return 0;
}


static LRESULT
HEADER_MouseMove (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
    POINT pt;
    UINT  flags;
    INT   nItem, nWidth;
    HDC   hdc;
    /* With theming, hottracking is always enabled */
    BOOL  hotTrackEnabled =
        ((dwStyle & HDS_BUTTONS) && (dwStyle & HDS_HOTTRACK))
        || (GetWindowTheme (hwnd) != NULL);
    INT oldHotItem = infoPtr->iHotItem;

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

    if (hotTrackEnabled) {
	if (flags & (HHT_ONHEADER | HHT_ONDIVIDER | HHT_ONDIVOPEN))
	    infoPtr->iHotItem = nItem;
	else
	    infoPtr->iHotItem = -1;
    }

    if (infoPtr->bCaptured) {
        /* check if we should drag the header */
	if (infoPtr->bPressed && !infoPtr->bDragging && dwStyle&HDS_DRAGDROP
	    && HEADER_IsDragDistance(infoPtr, &pt))
	{
            if (!HEADER_SendNotifyWithHDItemT(hwnd, HDN_BEGINDRAG, infoPtr->iMoveItem, NULL))
	    {
		HIMAGELIST hDragItem = (HIMAGELIST)HEADER_CreateDragImage(hwnd, infoPtr->iMoveItem);
		if (hDragItem != NULL)
		{
		    HEADER_ITEM *lpItem = &infoPtr->items[infoPtr->iMoveItem];
		    TRACE("Starting item drag\n");
		    ImageList_BeginDrag(hDragItem, 0, pt.x - lpItem->rect.left, 0);
		    ImageList_DragShowNolock(TRUE);
		    ImageList_Destroy(hDragItem);
		    infoPtr->bDragging = TRUE;
		}
	    }
	}
	
	if (infoPtr->bDragging)
	{
	    POINT drag;
	    drag.x = pt.x;
	    drag.y = 0;
	    ClientToScreen(hwnd, &drag);
	    ImageList_DragMove(drag.x, drag.y);
	    HEADER_SetHotDivider(hwnd, TRUE, lParam);
	}
	
	if (infoPtr->bPressed && !infoPtr->bDragging) {
            BOOL oldState = infoPtr->items[infoPtr->iMoveItem].bDown;
	    if ((nItem == infoPtr->iMoveItem) && (flags == HHT_ONHEADER))
		infoPtr->items[infoPtr->iMoveItem].bDown = TRUE;
	    else
		infoPtr->items[infoPtr->iMoveItem].bDown = FALSE;
            if (oldState != infoPtr->items[infoPtr->iMoveItem].bDown) {
                hdc = GetDC (hwnd);
	        HEADER_RefreshItem (hwnd, hdc, infoPtr->iMoveItem);
	        ReleaseDC (hwnd, hdc);
            }

	    TRACE("Moving pressed item %d!\n", infoPtr->iMoveItem);
	}
	else if (infoPtr->bTracking) {
	    if (dwStyle & HDS_FULLDRAG) {
                HEADER_ITEM *lpItem = &infoPtr->items[infoPtr->iMoveItem];
                nWidth = pt.x - lpItem->rect.left + infoPtr->xTrackOffset;
                if (!HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ITEMCHANGINGW, infoPtr->iMoveItem, HDI_WIDTH, nWidth))
		{
                    INT nOldWidth = lpItem->rect.right - lpItem->rect.left;
                    RECT rcClient;
                    RECT rcScroll;
                    
                    if (nWidth < 0) nWidth = 0;
                    infoPtr->items[infoPtr->iMoveItem].cxy = nWidth;
                    HEADER_SetItemBounds(hwnd);
                    
                    GetClientRect(hwnd, &rcClient);
                    rcScroll = rcClient;
                    rcScroll.left = lpItem->rect.left + nOldWidth;
                    ScrollWindowEx(hwnd, nWidth - nOldWidth, 0, &rcScroll, &rcClient, NULL, NULL, 0);
                    InvalidateRect(hwnd, &lpItem->rect, FALSE);
                    UpdateWindow(hwnd);
                    
                    HEADER_SendNotifyWithIntFieldT(hwnd, HDN_ITEMCHANGEDW, infoPtr->iMoveItem, HDI_WIDTH, nWidth);
		}
	    }
	    else {
                INT iTrackWidth;
		hdc = GetDC (hwnd);
		HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
		infoPtr->xOldTrack = pt.x + infoPtr->xTrackOffset;
		if (infoPtr->xOldTrack < infoPtr->items[infoPtr->iMoveItem].rect.left)
		    infoPtr->xOldTrack = infoPtr->items[infoPtr->iMoveItem].rect.left;
		HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
		ReleaseDC (hwnd, hdc);
                iTrackWidth = infoPtr->xOldTrack - infoPtr->items[infoPtr->iMoveItem].rect.left;
                /* FIXME: should stop tracking if HDN_TRACK returns TRUE */
                HEADER_SendNotifyWithIntFieldT(hwnd, HDN_TRACKW, infoPtr->iMoveItem, HDI_WIDTH, iTrackWidth);
	    }

	    TRACE("Tracking item %d!\n", infoPtr->iMoveItem);
	}
    }

    if (hotTrackEnabled) {
        TRACKMOUSEEVENT tme;
        if (oldHotItem != infoPtr->iHotItem && !infoPtr->bDragging) {
	    hdc = GetDC (hwnd);
	    if (oldHotItem != -1) HEADER_RefreshItem (hwnd, hdc, oldHotItem);
	    if (infoPtr->iHotItem != -1) HEADER_RefreshItem (hwnd, hdc, infoPtr->iHotItem);
	    ReleaseDC (hwnd, hdc);
        }
        tme.cbSize = sizeof( tme );
        tme.dwFlags = TME_LEAVE;
        tme.hwndTrack = hwnd;
        TrackMouseEvent( &tme );
    }

    return 0;
}


static LRESULT
HEADER_Paint (HWND hwnd, WPARAM wParam)
{
    HDC hdc;
    PAINTSTRUCT ps;

    hdc = wParam==0 ? BeginPaint (hwnd, &ps) : (HDC)wParam;
    HEADER_Refresh (hwnd, hdc);
    if(!wParam)
	EndPaint (hwnd, &ps);
    return 0;
}


static LRESULT
HEADER_RButtonUp (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    BOOL bRet;
    POINT pt;

    pt.x = (short)LOWORD(lParam);
    pt.y = (short)HIWORD(lParam);

    /* Send a Notify message */
    bRet = HEADER_SendSimpleNotify (hwnd, NM_RCLICK);

    /* Change to screen coordinate for WM_CONTEXTMENU */
    ClientToScreen(hwnd, &pt);

    /* Send a WM_CONTEXTMENU message in response to the RBUTTONUP */
    SendMessageW( hwnd, WM_CONTEXTMENU, (WPARAM) hwnd, MAKELPARAM(pt.x, pt.y));

    return bRet;
}


static LRESULT
HEADER_SetCursor (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
    POINT pt;
    UINT  flags;
    INT   nItem;

    TRACE("code=0x%X  id=0x%X\n", LOWORD(lParam), HIWORD(lParam));

    GetCursorPos (&pt);
    ScreenToClient (hwnd, &pt);

    HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);

    if (flags == HHT_ONDIVIDER)
        SetCursor (infoPtr->hcurDivider);
    else if (flags == HHT_ONDIVOPEN)
        SetCursor (infoPtr->hcurDivopen);
    else
        SetCursor (infoPtr->hcurArrow);

    return 0;
}


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

    infoPtr->hFont = (HFONT)wParam;

    hFont = infoPtr->hFont ? infoPtr->hFont : GetStockObject (SYSTEM_FONT);

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

    infoPtr->bRectsValid = FALSE;

    if (lParam) {
        InvalidateRect(hwnd, NULL, FALSE);
    }

    return 0;
}

static LRESULT HEADER_SetRedraw(HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    /* ignoring the InvalidateRect calls is handled by user32. But some apps expect
     * that we invalidate the header and this has to be done manually  */
    LRESULT ret;

    ret = DefWindowProcW(hwnd, WM_SETREDRAW, wParam, lParam);
    if (wParam)
        InvalidateRect(hwnd, NULL, TRUE);
    return ret;
}

/* Update the theme handle after a theme change */
static LRESULT HEADER_ThemeChanged(HWND hwnd)
{
    HTHEME theme = GetWindowTheme(hwnd);
    CloseThemeData(theme);
    OpenThemeData(hwnd, themeClass);
    InvalidateRect(hwnd, NULL, FALSE);
    return 0;
}


static LRESULT WINAPI
HEADER_WindowProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    TRACE("hwnd=%p msg=%x wparam=%x lParam=%lx\n", hwnd, msg, wParam, lParam);
    if (!HEADER_GetInfoPtr (hwnd) && (msg != WM_CREATE))
	return DefWindowProcW (hwnd, msg, wParam, lParam);
    switch (msg) {
/*	case HDM_CLEARFILTER: */

	case HDM_CREATEDRAGIMAGE:
	    return HEADER_CreateDragImage (hwnd, wParam);

	case HDM_DELETEITEM:
	    return HEADER_DeleteItem (hwnd, wParam);

/*	case HDM_EDITFILTER: */

	case HDM_GETBITMAPMARGIN:
	    return HEADER_GetBitmapMargin(hwnd);

	case HDM_GETIMAGELIST:
	    return HEADER_GetImageList (hwnd);

	case HDM_GETITEMA:
	case HDM_GETITEMW:
	    return HEADER_GetItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_GETITEMW);

	case HDM_GETITEMCOUNT:
	    return HEADER_GetItemCount (hwnd);

	case HDM_GETITEMRECT:
	    return HEADER_GetItemRect (hwnd, wParam, lParam);

	case HDM_GETORDERARRAY:
	    return HEADER_GetOrderArray(hwnd, wParam, lParam);

	case HDM_GETUNICODEFORMAT:
	    return HEADER_GetUnicodeFormat (hwnd);

	case HDM_HITTEST:
	    return HEADER_HitTest (hwnd, wParam, lParam);

	case HDM_INSERTITEMA:
	case HDM_INSERTITEMW:
	    return HEADER_InsertItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_INSERTITEMW);

	case HDM_LAYOUT:
	    return HEADER_Layout (hwnd, wParam, lParam);

	case HDM_ORDERTOINDEX:
	    return HEADER_OrderToIndex(hwnd, wParam);

	case HDM_SETBITMAPMARGIN:
	    return HEADER_SetBitmapMargin(hwnd, wParam);

/*	case HDM_SETFILTERCHANGETIMEOUT: */

        case HDM_SETHOTDIVIDER:
            return HEADER_SetHotDivider(hwnd, wParam, lParam);

	case HDM_SETIMAGELIST:
	    return HEADER_SetImageList (hwnd, (HIMAGELIST)lParam);

	case HDM_SETITEMA:
	case HDM_SETITEMW:
	    return HEADER_SetItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_SETITEMW);

	case HDM_SETORDERARRAY:
	    return HEADER_SetOrderArray(hwnd, wParam, lParam);

	case HDM_SETUNICODEFORMAT:
	    return HEADER_SetUnicodeFormat (hwnd, wParam);

        case WM_CREATE:
            return HEADER_Create (hwnd, wParam, lParam);

        case WM_DESTROY:
            return HEADER_Destroy (hwnd, wParam, lParam);

        case WM_ERASEBKGND:
            return 1;

        case WM_GETDLGCODE:
            return DLGC_WANTTAB | DLGC_WANTARROWS;

        case WM_GETFONT:
            return HEADER_GetFont (hwnd);

        case WM_LBUTTONDBLCLK:
            return HEADER_LButtonDblClk (hwnd, wParam, lParam);

        case WM_LBUTTONDOWN:
            return HEADER_LButtonDown (hwnd, wParam, lParam);

        case WM_LBUTTONUP:
            return HEADER_LButtonUp (hwnd, wParam, lParam);

        case WM_MOUSELEAVE:
            return HEADER_MouseLeave (hwnd, wParam, lParam);

        case WM_MOUSEMOVE:
            return HEADER_MouseMove (hwnd, wParam, lParam);

	case WM_NOTIFYFORMAT:
            return HEADER_NotifyFormat (hwnd, wParam, lParam);

	case WM_SIZE:
	    return HEADER_Size (hwnd, wParam);

        case WM_THEMECHANGED:
            return HEADER_ThemeChanged (hwnd);

        case WM_PRINTCLIENT:
        case WM_PAINT:
            return HEADER_Paint (hwnd, wParam);

        case WM_RBUTTONUP:
            return HEADER_RButtonUp (hwnd, wParam, lParam);

        case WM_SETCURSOR:
            return HEADER_SetCursor (hwnd, wParam, lParam);

        case WM_SETFONT:
            return HEADER_SetFont (hwnd, wParam, lParam);

        case WM_SETREDRAW:
            return HEADER_SetRedraw(hwnd, wParam, lParam);

        default:
            if ((msg >= WM_USER) && (msg < WM_APP))
		ERR("unknown msg %04x wp=%04x lp=%08lx\n",
		     msg, wParam, lParam );
	    return DefWindowProcW(hwnd, msg, wParam, lParam);
    }
}


VOID
HEADER_Register (void)
{
    WNDCLASSW wndClass;

    ZeroMemory (&wndClass, sizeof(WNDCLASSW));
    wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS;
    wndClass.lpfnWndProc   = HEADER_WindowProc;
    wndClass.cbClsExtra    = 0;
    wndClass.cbWndExtra    = sizeof(HEADER_INFO *);
    wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
    wndClass.lpszClassName = WC_HEADERW;

    RegisterClassW (&wndClass);
}


VOID
HEADER_Unregister (void)
{
    UnregisterClassW (WC_HEADERW, NULL);
}