mdi.c

winNT技术操作系统,国外开放的原代码和LIUX一样

/**********************************************************************
 *            MDIRefreshMenu
 */
static LRESULT MDI_RefreshMenu(MDICLIENTINFO *ci)
{
    UINT i, count, visible, id;
    WCHAR buf[MDI_MAXTITLELENGTH];

    TRACE("children %u, window menu %p\n", ci->nActiveChildren, ci->hWindowMenu);

    if (!ci->hWindowMenu)
        return 0;

    if (!IsMenu(ci->hWindowMenu))
    {
        WARN("Window menu handle %p is no more valid\n", ci->hWindowMenu);
        return 0;
    }

    /* Windows finds the last separator in the menu, and if after it
     * there is a menu item with MDI magic ID removes all existing
     * menu items after it, and then adds visible MDI children.
     */
    count = GetMenuItemCount(ci->hWindowMenu);
    for (i = 0; i < count; i++)
    {
        MENUITEMINFOW mii;

        memset(&mii, 0, sizeof(mii));
        mii.cbSize = sizeof(mii);
        mii.fMask  = MIIM_TYPE;
        if (GetMenuItemInfoW(ci->hWindowMenu, i, TRUE, &mii))
        {
            if (mii.fType & MF_SEPARATOR)
            {
                /* Windows checks only ID of the menu item */
                memset(&mii, 0, sizeof(mii));
                mii.cbSize = sizeof(mii);
                mii.fMask  = MIIM_ID;
                if (GetMenuItemInfoW(ci->hWindowMenu, i + 1, TRUE, &mii))
                {
                    if (mii.wID == ci->idFirstChild)
                    {
                        TRACE("removing %u items including separator\n", count - i);
                        while (RemoveMenu(ci->hWindowMenu, i, MF_BYPOSITION))
                            /* nothing */;

                        break;
                    }
                }
            }
        }
    }

    visible = 0;
    for (i = 0; i < ci->nActiveChildren; i++)
    {
        if (GetWindowLongW(ci->child[i], GWL_STYLE) & WS_VISIBLE)
        {
            id = ci->idFirstChild + visible;

            if (visible == MDI_MOREWINDOWSLIMIT)
            {
                LoadStringW(User32Instance, IDS_MDI_MOREWINDOWS, buf, sizeof(buf)/sizeof(WCHAR));
                AppendMenuW(ci->hWindowMenu, MF_STRING, id, buf);
                break;
            }

            if (!visible)
                /* Visio expects that separator has id 0 */
                AppendMenuW(ci->hWindowMenu, MF_SEPARATOR, 0, NULL);

            visible++;

            SetWindowLongPtrW(ci->child[i], GWLP_ID, id);

            buf[0] = '&';
            buf[1] = '0' + visible;
            buf[2] = ' ';
            InternalGetWindowText(ci->child[i], buf + 3, sizeof(buf)/sizeof(WCHAR) - 3);
            TRACE("Adding %p, id %u %s\n", ci->child[i], id, debugstr_w(buf));
            AppendMenuW(ci->hWindowMenu, MF_STRING, id, buf);

            if (ci->child[i] == ci->hwndActiveChild)
                CheckMenuItem(ci->hWindowMenu, id, MF_CHECKED);
        }
        else
            TRACE("MDI child %p is not visible, skipping\n", ci->child[i]);
    }

    return (LRESULT)ci->hFrameMenu;
}


/* ------------------ MDI child window functions ---------------------- */

/**********************************************************************
 *			MDI_ChildGetMinMaxInfo
 *
 * Note: The rule here is that client rect of the maximized MDI child
 *	 is equal to the client rect of the MDI client window.
 */
static void MDI_ChildGetMinMaxInfo( HWND client, HWND hwnd, MINMAXINFO* lpMinMax )
{
    RECT rect;

    GetClientRect( client, &rect );
    AdjustWindowRectEx( &rect, GetWindowLongW( hwnd, GWL_STYLE ),
                        0, GetWindowLongW( hwnd, GWL_EXSTYLE ));

    lpMinMax->ptMaxSize.x = rect.right -= rect.left;
    lpMinMax->ptMaxSize.y = rect.bottom -= rect.top;

    lpMinMax->ptMaxPosition.x = rect.left;
    lpMinMax->ptMaxPosition.y = rect.top;

    TRACE("max rect (%ld,%ld - %ld, %ld)\n",
                        rect.left,rect.top,rect.right,rect.bottom);
}

/**********************************************************************
 *			MDI_SwitchActiveChild
 *
 * Note: SetWindowPos sends WM_CHILDACTIVATE to the child window that is
 *       being activated
 */
static void MDI_SwitchActiveChild( MDICLIENTINFO *ci, HWND hwndTo, BOOL activate )
{
    HWND hwndPrev;

    hwndPrev = ci->hwndActiveChild;

    TRACE("from %p, to %p\n", hwndPrev, hwndTo);

    if ( hwndTo != hwndPrev )
    {
        BOOL was_zoomed = IsZoomed(hwndPrev);

        if (was_zoomed)
        {
            /* restore old MDI child */
            SendMessageW( hwndPrev, WM_SETREDRAW, FALSE, 0 );
            ShowWindow( hwndPrev, SW_RESTORE );
            SendMessageW( hwndPrev, WM_SETREDRAW, TRUE, 0 );

            /* activate new MDI child */
            SetWindowPos( hwndTo, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE );
            /* maximize new MDI child */
            ShowWindow( hwndTo, SW_MAXIMIZE );
        }
        /* activate new MDI child */
        SetWindowPos( hwndTo, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | (activate ? 0 : SWP_NOACTIVATE) );
    }
}


/**********************************************************************
 *                                      MDIDestroyChild
 */
static LRESULT MDIDestroyChild( HWND client, MDICLIENTINFO *ci,
                                HWND child, BOOL flagDestroy )
{
    UINT i;

    TRACE("# of managed children %u\n", ci->nActiveChildren);

    if( child == ci->hwndActiveChild )
    {
        HWND next = MDI_GetWindow(ci, child, TRUE, 0);
        if (next)
            MDI_SwitchActiveChild(ci, next, TRUE);
        else
        {
            ShowWindow(child, SW_HIDE);
            if (IsZoomed(child))
            {
                MDI_RestoreFrameMenu(GetParent(client), child, ci->hBmpClose);
                MDI_UpdateFrameText(GetParent(client), client, NULL);
            }
            MDI_ChildActivate(client, 0);
        }
    }

    for (i = 0; i < ci->nActiveChildren; i++)
    {
        if (ci->child[i] == child)
        {
            HWND *new_child = HeapAlloc(GetProcessHeap(), 0, (ci->nActiveChildren - 1) * sizeof(HWND));
            memcpy(new_child, ci->child, i * sizeof(HWND));
            if (i + 1 < ci->nActiveChildren)
                memcpy(new_child + i, ci->child + i + 1, (ci->nActiveChildren - i - 1) * sizeof(HWND));
            HeapFree(GetProcessHeap(), 0, ci->child);
            ci->child = new_child;

            ci->nActiveChildren--;
            break;
        }
    }

    SendMessageW(client, WM_MDIREFRESHMENU, 0, 0);

    if (flagDestroy)
    {
        MDI_PostUpdate(GetParent(child), ci, SB_BOTH+1);
        DestroyWindow(child);
    }

    TRACE("child destroyed - %p\n", child);
    return 0;
}


/**********************************************************************
 *					MDI_ChildActivate
 *
 * Called in response to WM_CHILDACTIVATE, or when last MDI child
 * is being deactivated.
 */
static LONG MDI_ChildActivate( HWND client, HWND child )
{
    MDICLIENTINFO *clientInfo;
    HWND prevActiveWnd, frame;
    BOOL isActiveFrameWnd;

    clientInfo = get_client_info( client );

    if (clientInfo->hwndActiveChild == child) return 0;

    TRACE("%p\n", child);

    frame = GetParent(client);
    isActiveFrameWnd = (GetActiveWindow() == frame);
    prevActiveWnd = clientInfo->hwndActiveChild;

    /* deactivate prev. active child */
    if(prevActiveWnd)
    {
        SendMessageW( prevActiveWnd, WM_NCACTIVATE, FALSE, 0L );
        SendMessageW( prevActiveWnd, WM_MDIACTIVATE, (WPARAM)prevActiveWnd, (LPARAM)child);
    }

    MDI_SwitchActiveChild( clientInfo, child, FALSE );
    clientInfo->hwndActiveChild = child;

    MDI_RefreshMenu(clientInfo);

    if( isActiveFrameWnd )
    {
        SendMessageW( child, WM_NCACTIVATE, TRUE, 0L);
        SetFocus( client );
    }

    SendMessageW( child, WM_MDIACTIVATE, (WPARAM)prevActiveWnd, (LPARAM)child );
    return TRUE;
}

/* -------------------- MDI client window functions ------------------- */

/**********************************************************************
 *				CreateMDIMenuBitmap
 */
static HBITMAP CreateMDIMenuBitmap(void)
{
 HDC 		hDCSrc  = CreateCompatibleDC(0);
 HDC		hDCDest	= CreateCompatibleDC(hDCSrc);
 HBITMAP	hbClose = LoadBitmapW(0, MAKEINTRESOURCEW(OBM_OLD_CLOSE) );
 HBITMAP	hbCopy;
 HBITMAP	hobjSrc, hobjDest;

 hobjSrc = SelectObject(hDCSrc, hbClose);
 hbCopy = CreateCompatibleBitmap(hDCSrc,GetSystemMetrics(SM_CXSIZE),GetSystemMetrics(SM_CYSIZE));
 hobjDest = SelectObject(hDCDest, hbCopy);

 BitBlt(hDCDest, 0, 0, GetSystemMetrics(SM_CXSIZE), GetSystemMetrics(SM_CYSIZE),
          hDCSrc, GetSystemMetrics(SM_CXSIZE), 0, SRCCOPY);

 SelectObject(hDCSrc, hobjSrc);
 DeleteObject(hbClose);
 DeleteDC(hDCSrc);

 hobjSrc = SelectObject( hDCDest, GetStockObject(BLACK_PEN) );

 MoveToEx( hDCDest, GetSystemMetrics(SM_CXSIZE) - 1, 0, NULL );
 LineTo( hDCDest, GetSystemMetrics(SM_CXSIZE) - 1, GetSystemMetrics(SM_CYSIZE) - 1);

 SelectObject(hDCDest, hobjSrc );
 SelectObject(hDCDest, hobjDest);
 DeleteDC(hDCDest);

 return hbCopy;
}

/**********************************************************************
 *				MDICascade
 */
static LONG MDICascade( HWND client, MDICLIENTINFO *ci )
{
    HWND *win_array;
    BOOL has_icons = FALSE;
    int i, total;

    if (IsZoomed(ci->hwndActiveChild))
        SendMessageW(client, WM_MDIRESTORE, (WPARAM)ci->hwndActiveChild, 0);

    if (ci->nActiveChildren == 0) return 0;

    if (!(win_array = WIN_ListChildren( client ))) return 0;

    /* remove all the windows we don't want */
    for (i = total = 0; win_array[i]; i++)
    {
        if (!IsWindowVisible( win_array[i] )) continue;
        if (GetWindow( win_array[i], GW_OWNER )) continue; /* skip owned windows */
        if (IsIconic( win_array[i] ))
        {
            has_icons = TRUE;
            continue;
        }
        win_array[total++] = win_array[i];
    }
    win_array[total] = 0;

    if (total)
    {
        INT delta = 0, n = 0, i;
        POINT pos[2];
        if (has_icons) delta = GetSystemMetrics(SM_CYICONSPACING) + GetSystemMetrics(SM_CYICON);

        /* walk the list (backwards) and move windows */
        for (i = total - 1; i >= 0; i--)
        {
            TRACE("move %p to (%ld,%ld) size [%ld,%ld]\n",
                  win_array[i], pos[0].x, pos[0].y, pos[1].x, pos[1].y);

            MDI_CalcDefaultChildPos(client, n++, pos, delta, NULL);
            SetWindowPos( win_array[i], 0, pos[0].x, pos[0].y, pos[1].x, pos[1].y,
                          SWP_DRAWFRAME | SWP_NOACTIVATE | SWP_NOZORDER);
        }
    }
    HeapFree( GetProcessHeap(), 0, win_array );

    if (has_icons) ArrangeIconicWindows( client );
    return 0;
}

/**********************************************************************
 *					MDITile
 */
static void MDITile( HWND client, MDICLIENTINFO *ci, WPARAM wParam )
{
    HWND *win_array;
    int i, total;
    BOOL has_icons = FALSE;

    if (IsZoomed(ci->hwndActiveChild))
        SendMessageW(client, WM_MDIRESTORE, (WPARAM)ci->hwndActiveChild, 0);

    if (ci->nActiveChildren == 0) return;

    if (!(win_array = WIN_ListChildren( client ))) return;

    /* remove all the windows we don't want */
    for (i = total = 0; win_array[i]; i++)
    {
        if (!IsWindowVisible( win_array[i] )) continue;
        if (GetWindow( win_array[i], GW_OWNER )) continue; /* skip owned windows (icon titles) */
        if (IsIconic( win_array[i] ))
        {
            has_icons = TRUE;
            continue;
        }
        if ((wParam & MDITILE_SKIPDISABLED) && !IsWindowEnabled( win_array[i] )) continue;
        win_array[total++] = win_array[i];
    }
    win_array[total] = 0;

    TRACE("%u windows to tile\n", total);

    if (total)
    {
        HWND *pWnd = win_array;
        RECT rect;
        int x, y, xsize, ysize;
        int rows, columns, r, c, i;

        GetClientRect(client,&rect);
        rows    = (int) sqrt((double)total);
        columns = total / rows;

        if( wParam & MDITILE_HORIZONTAL )  /* version >= 3.1 */
        {
            i = rows;
            rows = columns;  /* exchange r and c */
            columns = i;
        }

        if (has_icons)
        {
            y = rect.bottom - 2 * GetSystemMetrics(SM_CYICONSPACING) - GetSystemMetrics(SM_CYICON);
            rect.bottom = ( y - GetSystemMetrics(SM_CYICON) < rect.top )? rect.bottom: y;
        }

        ysize   = rect.bottom / rows;
        xsize   = rect.right  / columns;