path: root/hw/xwin/winmultiwindowwindow.c

/*
 *Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
 *Copyright (C) Colin Harrison 2005-2008
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of the XFree86 Project
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from the XFree86 Project.
 *
 * Authors:	Kensuke Matsuzaki
 *		Earle F. Philhower, III
 *		Harold L Hunt II
 *              Colin Harrison
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif

#include "win.h"
#include "dixevents.h"
#include "winmultiwindowclass.h"
#include "winmultiwindowicons.h"

/*
 * Prototypes for local functions
 */

void
 winCreateWindowsWindow(WindowPtr pWin);

static void
 winDestroyWindowsWindow(WindowPtr pWin);

static void
 winUpdateWindowsWindow(WindowPtr pWin);

static void
 winFindWindow(pointer value, XID id, pointer cdata);

static Bool
isToplevelWindow(WindowPtr pWin)
{
    assert(pWin->parent);       /* root window isn't expected here */

    /* If the immediate parent is the root window, this is a top-level window */
    if ((pWin->parent) && (pWin->parent->parent == NULL)) {
        assert(pWin->parent == pWin->drawable.pScreen->root);
        return TRUE;
    }

    /* otherwise, a child window */
    return FALSE;
}

static
    void
winInitMultiWindowClass(void)
{
    static wATOM atomXWinClass = 0;
    static wATOM atomXWinChildClass = 0;
    WNDCLASSEX wcx;

    if (atomXWinClass == 0) {
        HICON hIcon, hIconSmall;

        /* Load the default icons */
        winSelectIcons(&hIcon, &hIconSmall);

        /* Setup our window class */
        wcx.cbSize = sizeof(WNDCLASSEX);
        wcx.style = CS_HREDRAW | CS_VREDRAW | (g_fNativeGl ? CS_OWNDC : 0);
        wcx.lpfnWndProc = winTopLevelWindowProc;
        wcx.cbClsExtra = 0;
        wcx.cbWndExtra = 0;
        wcx.hInstance = g_hInstance;
        wcx.hIcon = hIcon;
        wcx.hCursor = 0;
        wcx.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
        wcx.lpszMenuName = NULL;
        wcx.lpszClassName = WINDOW_CLASS_X;
        wcx.hIconSm = hIconSmall;

#if CYGMULTIWINDOW_DEBUG
        ErrorF("winInitMultiWindowClass - Creating class: %s\n",
               WINDOW_CLASS_X);
#endif

        atomXWinClass = RegisterClassEx(&wcx);
    }

    if (atomXWinChildClass == 0) {
        HICON hIcon, hIconSmall;

        /* Load the default icons */
        winSelectIcons(&hIcon, &hIconSmall);

        /* Setup our window class */
        wcx.cbSize = sizeof(WNDCLASSEX);
        wcx.style = CS_HREDRAW | CS_VREDRAW | (g_fNativeGl ? CS_OWNDC : 0);
        wcx.lpfnWndProc = winChildWindowProc;
        wcx.cbClsExtra = 0;
        wcx.cbWndExtra = 0;
        wcx.hInstance = g_hInstance;
        wcx.hIcon = hIcon;
        wcx.hCursor = 0;
        wcx.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
        wcx.lpszMenuName = NULL;
        wcx.lpszClassName = WINDOW_CLASS_X_CHILD;
        wcx.hIconSm = hIconSmall;

#if CYGMULTIWINDOW_DEBUG
        ErrorF("winInitMultiWindowClass - Creating class: %s\n",
               WINDOW_CLASS_X_CHILD);
#endif

        atomXWinChildClass = RegisterClassEx(&wcx);
    }
}

/*
 * CreateWindow - See Porting Layer Definition - p. 37
 */

Bool
winCreateWindowMultiWindow(WindowPtr pWin)
{
    Bool fResult = TRUE;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winWindowPriv(pWin);
    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG
    winTrace("winCreateWindowMultiWindow - pWin: %p\n", pWin);
#endif

    WIN_UNWRAP(CreateWindow);
    fResult = (*pScreen->CreateWindow) (pWin);
    WIN_WRAP(CreateWindow, winCreateWindowMultiWindow);

    /* Initialize some privates values */
    pWinPriv->hRgn = NULL;
    pWinPriv->hWnd = NULL;
    pWinPriv->pScreenPriv = winGetScreenPriv(pWin->drawable.pScreen);
    pWinPriv->fXKilled = FALSE;
#ifdef XWIN_GLX_WINDOWS
    pWinPriv->fWglUsed = FALSE;
#endif

    return fResult;
}

/*
 * DestroyWindow - See Porting Layer Definition - p. 37
 */

Bool
winDestroyWindowMultiWindow(WindowPtr pWin)
{
    Bool fResult = TRUE;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winWindowPriv(pWin);
    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winDestroyWindowMultiWindow - pWin: %p\n", pWin);
#endif

    WIN_UNWRAP(DestroyWindow);
    fResult = (*pScreen->DestroyWindow) (pWin);
    WIN_WRAP(DestroyWindow, winDestroyWindowMultiWindow);

    /* Flag that the window has been destroyed */
    pWinPriv->fXKilled = TRUE;

    /* Kill the MS Windows window associated with this window */
    winDestroyWindowsWindow(pWin);

    return fResult;
}

/*
 * PositionWindow - See Porting Layer Definition - p. 37
 *
 * This function adjusts the position and size of Windows window
 * with respect to the underlying X window.  This is the inverse
 * of winAdjustXWindow, which adjusts X window to Windows window.
 */

Bool
winPositionWindowMultiWindow(WindowPtr pWin, int x, int y)
{
    Bool fResult = TRUE;
    int iX, iY, iWidth, iHeight;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winWindowPriv(pWin);
    winScreenPriv(pScreen);

    HWND hWnd = pWinPriv->hWnd;
    RECT rcNew;
    RECT rcOld;

#if CYGMULTIWINDOW_DEBUG
    RECT rcClient;
    RECT *lpRc;
#endif
    DWORD dwExStyle;
    DWORD dwStyle;

#if CYGMULTIWINDOW_DEBUG
    winTrace("winPositionWindowMultiWindow - pWin: %p\n", pWin);
#endif

    WIN_UNWRAP(PositionWindow);
    fResult = (*pScreen->PositionWindow) (pWin, x, y);
    WIN_WRAP(PositionWindow, winPositionWindowMultiWindow);

#if CYGWINDOWING_DEBUG
    ErrorF("winPositionWindowMultiWindow: (x, y) = (%d, %d)\n", x, y);
#endif

    /* Bail out if the Windows window handle is bad */
    if (!hWnd) {
#if CYGWINDOWING_DEBUG
        ErrorF("\timmediately return since hWnd is NULL\n");
#endif
        return fResult;
    }

    if (!isToplevelWindow(pWin)) {
        POINT parentOrigin;

        /* Get the X and Y location of the X window */
        iX = pWin->drawable.x + GetSystemMetrics(SM_XVIRTUALSCREEN);
        iY = pWin->drawable.y + GetSystemMetrics(SM_YVIRTUALSCREEN);

        /* Get the height and width of the X window */
        iWidth = pWin->drawable.width;
        iHeight = pWin->drawable.height;

        /* Convert screen coordinates into client area co-ordinates of the parent */
        parentOrigin.x = 0;
        parentOrigin.y = 0;
        ClientToScreen(GetParent(hWnd), &parentOrigin);

        MoveWindow(hWnd,
                   iX - parentOrigin.x, iY - parentOrigin.y, iWidth, iHeight,
                   TRUE);

        return fResult;
    }

    /* Get the Windows window style and extended style */
    dwExStyle = GetWindowLongPtr(hWnd, GWL_EXSTYLE);
    dwStyle = GetWindowLongPtr(hWnd, GWL_STYLE);

    /* Get the X and Y location of the X window */
    iX = pWin->drawable.x + GetSystemMetrics(SM_XVIRTUALSCREEN);
    iY = pWin->drawable.y + GetSystemMetrics(SM_YVIRTUALSCREEN);

    /* Get the height and width of the X window */
    iWidth = pWin->drawable.width;
    iHeight = pWin->drawable.height;

    /* Store the origin, height, and width in a rectangle structure */
    SetRect(&rcNew, iX, iY, iX + iWidth, iY + iHeight);

#if CYGMULTIWINDOW_DEBUG
    lpRc = &rcNew;
    ErrorF("winPositionWindowMultiWindow - (%d ms)drawable (%d, %d)-(%d, %d)\n",
           GetTickCount(), lpRc->left, lpRc->top, lpRc->right, lpRc->bottom);
#endif

    /*
     * Calculate the required size of the Windows window rectangle,
     * given the size of the Windows window client area.
     */
    AdjustWindowRectEx(&rcNew, dwStyle, FALSE, dwExStyle);

    /* Get a rectangle describing the old Windows window */
    GetWindowRect(hWnd, &rcOld);

#if CYGMULTIWINDOW_DEBUG
    /* Get a rectangle describing the Windows window client area */
    GetClientRect(hWnd, &rcClient);

    lpRc = &rcNew;
    ErrorF("winPositionWindowMultiWindow - (%d ms)rcNew (%d, %d)-(%d, %d)\n",
           GetTickCount(), lpRc->left, lpRc->top, lpRc->right, lpRc->bottom);

    lpRc = &rcOld;
    ErrorF("winPositionWindowMultiWindow - (%d ms)rcOld (%d, %d)-(%d, %d)\n",
           GetTickCount(), lpRc->left, lpRc->top, lpRc->right, lpRc->bottom);

    lpRc = &rcClient;
    ErrorF("(%d ms)rcClient (%d, %d)-(%d, %d)\n",
           GetTickCount(), lpRc->left, lpRc->top, lpRc->right, lpRc->bottom);
#endif

    /* Check if the old rectangle and new rectangle are the same */
    if (!EqualRect(&rcNew, &rcOld)) {
#if CYGMULTIWINDOW_DEBUG
        ErrorF("winPositionWindowMultiWindow - Need to move\n");
#endif

#if CYGWINDOWING_DEBUG
        ErrorF("\tMoveWindow to (%ld, %ld) - %ldx%ld\n", rcNew.left, rcNew.top,
               rcNew.right - rcNew.left, rcNew.bottom - rcNew.top);
#endif
        /* Change the position and dimensions of the Windows window */
        MoveWindow(hWnd,
                   rcNew.left, rcNew.top,
                   rcNew.right - rcNew.left, rcNew.bottom - rcNew.top, TRUE);
    }
    else {
#if CYGMULTIWINDOW_DEBUG
        ErrorF("winPositionWindowMultiWindow - Not need to move\n");
#endif
    }

    return fResult;
}

/*
 * ChangeWindowAttributes - See Porting Layer Definition - p. 37
 */

Bool
winChangeWindowAttributesMultiWindow(WindowPtr pWin, unsigned long mask)
{
    Bool fResult = TRUE;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winChangeWindowAttributesMultiWindow - pWin: %08x\n", pWin);
#endif

    WIN_UNWRAP(ChangeWindowAttributes);
    fResult = (*pScreen->ChangeWindowAttributes) (pWin, mask);
    WIN_WRAP(ChangeWindowAttributes, winChangeWindowAttributesMultiWindow);

    /*
     * NOTE: We do not currently need to do anything here.
     */

    return fResult;
}

/*
 * UnmapWindow - See Porting Layer Definition - p. 37
 * Also referred to as UnrealizeWindow
 */

Bool
winUnmapWindowMultiWindow(WindowPtr pWin)
{
    Bool fResult = TRUE;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winWindowPriv(pWin);
    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winUnmapWindowMultiWindow - pWin: %08x\n", pWin);
#endif

    WIN_UNWRAP(UnrealizeWindow);
    fResult = (*pScreen->UnrealizeWindow) (pWin);
    WIN_WRAP(UnrealizeWindow, winUnmapWindowMultiWindow);

    /* Flag that the window has been killed */
    pWinPriv->fXKilled = TRUE;

    /* Destroy the Windows window associated with this X window */
    winDestroyWindowsWindow(pWin);

    return fResult;
}

/*
 * MapWindow - See Porting Layer Definition - p. 37
 * Also referred to as RealizeWindow
 */

Bool
winMapWindowMultiWindow(WindowPtr pWin)
{
    Bool fResult = TRUE;
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winWindowPriv(pWin);
    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winMapWindowMultiWindow - pWin: %08x\n", pWin);
#endif

    WIN_UNWRAP(RealizeWindow);
    fResult = (*pScreen->RealizeWindow) (pWin);
    WIN_WRAP(RealizeWindow, winMapWindowMultiWindow);

    /* Flag that this window has not been destroyed */
    pWinPriv->fXKilled = FALSE;

    /* Refresh/redisplay the Windows window associated with this X window */
    winUpdateWindowsWindow(pWin);

    /* Update the Windows window's shape */
    winReshapeMultiWindow(pWin);
    winUpdateRgnMultiWindow(pWin);

    return fResult;
}

/*
 * ReparentWindow - See Porting Layer Definition - p. 42
 */

void
winReparentWindowMultiWindow(WindowPtr pWin, WindowPtr pPriorParent)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

    winDebug
        ("winReparentMultiWindow - pWin:%08x XID:0x%x, reparent from pWin:%08x XID:0x%x to pWin:%08x XID:0x%x\n",
         pWin, pWin->drawable.id, pPriorParent, pPriorParent->drawable.id,
         pWin->parent, pWin->parent->drawable.id);

    WIN_UNWRAP(ReparentWindow);
    if (pScreen->ReparentWindow)
        (*pScreen->ReparentWindow) (pWin, pPriorParent);
    WIN_WRAP(ReparentWindow, winReparentWindowMultiWindow);

    /* Update the Windows window associated with this X window */
    winUpdateWindowsWindow(pWin);
}

/*
 * RestackWindow - Shuffle the z-order of a window
 */

void
winRestackWindowMultiWindow(WindowPtr pWin, WindowPtr pOldNextSib)
{
#if 0
    WindowPtr pPrevWin;
    UINT uFlags;
    HWND hInsertAfter;
    HWND hWnd = NULL;
#endif
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

#if CYGMULTIWINDOW_DEBUG || CYGWINDOWING_DEBUG
    winTrace("winRestackMultiWindow - %08x\n", pWin);
#endif

    WIN_UNWRAP(RestackWindow);
    if (pScreen->RestackWindow)
        (*pScreen->RestackWindow) (pWin, pOldNextSib);
    WIN_WRAP(RestackWindow, winRestackWindowMultiWindow);

#if 1
    /*
     * Calling winReorderWindowsMultiWindow here means our window manager
     * (i.e. Windows Explorer) has initiative to determine Z order.
     */
    if (pWin->nextSib != pOldNextSib)
        winReorderWindowsMultiWindow();
#else
    /* Bail out if no window privates or window handle is invalid */
    if (!pWinPriv || !pWinPriv->hWnd)
        return;

    /* Get a pointer to our previous sibling window */
    pPrevWin = pWin->prevSib;

    /*
     * Look for a sibling window with
     * valid privates and window handle
     */
    while (pPrevWin && !winGetWindowPriv(pPrevWin)
           && !winGetWindowPriv(pPrevWin)->hWnd)
        pPrevWin = pPrevWin->prevSib;

    /* Check if we found a valid sibling */
    if (pPrevWin) {
        /* Valid sibling - get handle to insert window after */
        hInsertAfter = winGetWindowPriv(pPrevWin)->hWnd;
        uFlags = SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE;

        hWnd = GetNextWindow(pWinPriv->hWnd, GW_HWNDPREV);

        do {
            if (GetProp(hWnd, WIN_WINDOW_PROP)) {
                if (hWnd == winGetWindowPriv(pPrevWin)->hWnd) {
                    uFlags |= SWP_NOZORDER;
                }
                break;
            }
            hWnd = GetNextWindow(hWnd, GW_HWNDPREV);
        }
        while (hWnd);
    }
    else {
        /* No valid sibling - make this window the top window */
        hInsertAfter = HWND_TOP;
        uFlags = SWP_NOMOVE | SWP_NOSIZE;
    }

    /* Perform the restacking operation in Windows */
    SetWindowPos(pWinPriv->hWnd, hInsertAfter, 0, 0, 0, 0, uFlags);
#endif
}

static void
winCreateWindowsTopLevelWindow(WindowPtr pWin)
{
    int iX, iY;
    int iWidth;
    int iHeight;
    HWND hWnd;
    HWND hFore = NULL;

    winWindowPriv(pWin);
    winPrivScreenPtr pScreenPriv = pWinPriv->pScreenPriv;
    WinXSizeHints hints;
    Window daddyId;
    DWORD dwStyle, dwExStyle;
    RECT rc;

    winInitMultiWindowClass();

    winDebug("winCreateWindowsTopLevelWindow - pWin:%08x XID:0x%x \n", pWin,
             pWin->drawable.id);

    iX = pWin->drawable.x + GetSystemMetrics(SM_XVIRTUALSCREEN);
    iY = pWin->drawable.y + GetSystemMetrics(SM_YVIRTUALSCREEN);

    iWidth = pWin->drawable.width;
    iHeight = pWin->drawable.height;

    /* If it's an InputOutput window, and so is going to end up being made visible,
       make sure the window actually ends up somewhere where it will be visible */
    if (pWin->drawable.class != InputOnly) {
        if ((iX < GetSystemMetrics(SM_XVIRTUALSCREEN)) ||
            (iX > GetSystemMetrics(SM_CXVIRTUALSCREEN)))
            iX = CW_USEDEFAULT;

        if ((iY < GetSystemMetrics(SM_YVIRTUALSCREEN)) ||
            (iY > GetSystemMetrics(SM_CYVIRTUALSCREEN)))
            iY = CW_USEDEFAULT;
    }

    winDebug("winCreateWindowsTopLevelWindow - %dx%d @ %dx%d\n", iWidth,
             iHeight, iX, iY);

    if (winMultiWindowGetTransientFor(pWin, &daddyId)) {
        if (daddyId) {
            hFore = GetForegroundWindow();
            if (hFore && (daddyId != (Window) (INT_PTR) GetProp(hFore, WIN_WID_PROP)))
                hFore = NULL;
        }
    }
    else {
        /* Default positions if none specified */
        if (!winMultiWindowGetWMNormalHints(pWin, &hints))
            hints.flags = 0;
        if (!(hints.flags & (USPosition | PPosition)) &&
            !pWin->overrideRedirect) {
            iX = CW_USEDEFAULT;
            iY = CW_USEDEFAULT;
        }
    }

    winDebug("winCreateWindowsTopLevelWindow - %dx%d @ %dx%d\n", iWidth,
             iHeight, iX, iY);

    /* Create the window */
    /* Make it OVERLAPPED in create call since WS_POPUP doesn't support */
    /* CW_USEDEFAULT, change back to popup after creation */
    dwStyle = WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
    dwExStyle = WS_EX_TOOLWINDOW;

    /*
       Calculate the window coordinates containing the requested client area,
       being careful to preseve CW_USEDEFAULT
     */
    rc.top = (iY != CW_USEDEFAULT) ? iY : 0;
    rc.left = (iX != CW_USEDEFAULT) ? iX : 0;
    rc.bottom = rc.top + iHeight;
    rc.right = rc.left + iWidth;
    AdjustWindowRectEx(&rc, dwStyle, FALSE, dwExStyle);
    if (iY != CW_USEDEFAULT)
        iY = rc.top;
    if (iX != CW_USEDEFAULT)
        iX = rc.left;
    iHeight = rc.bottom - rc.top;
    iWidth = rc.right - rc.left;

    winDebug("winCreateWindowsWindow - %dx%d @ %dx%d\n", iWidth, iHeight, iX,
             iY);

    /* Create the window */
    hWnd = CreateWindowExA(dwExStyle,   /* Extended styles */
                           WINDOW_CLASS_X,      /* Class name */
                           WINDOW_TITLE_X,      /* Window name */
                           dwStyle,     /* Styles */
                           iX,  /* Horizontal position */
                           iY,  /* Vertical position */
                           iWidth,      /* Right edge */
                           iHeight,     /* Bottom edge */
                           hFore,       /* Null or Parent window if transient */
                           (HMENU) NULL,        /* No menu */
                           GetModuleHandle(NULL),       /* Instance handle */
                           pWin);       /* ScreenPrivates */
    if (hWnd == NULL) {
        ErrorF
            ("winCreateWindowsTopLevelWindow - CreateWindowExA () failed: %d\n",
             (int) GetLastError());
    }
    pWinPriv->hWnd = hWnd;

    winDebug("winCreateWindowsTopLevelWindow - hwnd 0x%08x\n", hWnd);

    /* Change style back to popup, already placed... */
    SetWindowLongPtr(hWnd, GWL_STYLE,
                     WS_POPUP | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
    SetWindowPos(hWnd, 0, 0, 0, 0, 0,
                 SWP_FRAMECHANGED | SWP_NOZORDER | SWP_NOMOVE | SWP_NOSIZE |
                 SWP_NOACTIVATE);

    /* Adjust the X window to match the window placement we actually got... */
    winAdjustXWindow(pWin, hWnd);

    /* Make sure it gets the proper system menu for a WS_POPUP, too */
    GetSystemMenu(hWnd, TRUE);

    /* Cause any .XWinrc menus to be added in main WNDPROC */
    PostMessage(hWnd, WM_INIT_SYS_MENU, 0, 0);

    SetProp(hWnd, WIN_WID_PROP, (HANDLE) (INT_PTR) winGetWindowID(pWin));

    /* Flag that this Windows window handles its own activation */
    SetProp(hWnd, WIN_NEEDMANAGE_PROP, (HANDLE) 0);

    /* Call engine-specific create window procedure */
    (*pScreenPriv->pwinFinishCreateWindowsWindow) (pWin);
}

static void
winCreateWindowsChildWindow(WindowPtr pWin)
{
    int iX, iY, iWidth, iHeight;
    HWND hWnd;
    WindowPtr pParent = pWin->parent;
    DWORD dwStyle = WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_DISABLED;
    DWORD dwExStyle = WS_EX_TRANSPARENT;

    /*
       WS_DISABLED means child window never gains the input focus, so only the
       top-level window needs deal with passing input to the X server

       WS_EX_TRANSPARENT ensures that the contents of the top-level
       Windows window (which will contain all non-OpenGL drawing for the hierarchy)
       can be seen through any intermediate child windows which have nothing
       drawn to them
     */
    winPrivWinPtr pParentPriv, pWinPriv;

    winDebug("winCreateWindowsChildWindow - pWin:%08x XID:0x%x \n", pWin,
             pWin->drawable.id);

    winInitMultiWindowClass();

    assert(pParent);

    pParentPriv = winGetWindowPriv(pParent);
    pWinPriv = winGetWindowPriv(pWin);

    iX = pWin->drawable.x - pParent->drawable.x;
    iY = pWin->drawable.y - pParent->drawable.y;
    iWidth = pWin->drawable.width;
    iHeight = pWin->drawable.height;

    winDebug
        ("winCreateWindowsChildWindow - parent pWin:%08x XID:0x%08x hWnd:0x%08x\n",
         pParent, pParent->drawable.id, pParentPriv->hWnd);
    winDebug("winCreateWindowsChildWindow - %dx%d @ %dx%d\n", iWidth, iHeight,
             iX, iY);

    /* Create the window */
    hWnd = CreateWindowExA(dwExStyle,   /* Extended styles */
                           WINDOW_CLASS_X_CHILD,        /* Class name */
                           WINDOW_TITLE_X,      /* Window name */
                           dwStyle,     /* Styles */
                           iX,  /* Horizontal position */
                           iY,  /* Vertical position */
                           iWidth,      /* Right edge */
                           iHeight,     /* Bottom edge */
                           pParentPriv->hWnd,   /* parent window */
                           (HMENU) NULL,        /* No menu */
                           GetModuleHandle(NULL),       /* Instance handle */
                           pWin);       /* ScreenPrivates */
    if (hWnd == NULL) {
        ErrorF("winCreateWindowsChildWindow - CreateWindowExA () failed: %d\n",
               (int) GetLastError());
    }
    winDebug("winCreateWindowsChildWindow - hwnd 0x%08x\n", hWnd);
    pWinPriv->hWnd = hWnd;

    SetProp(hWnd, WIN_WID_PROP, (HANDLE) (INT_PTR) winGetWindowID(pWin));
}

/*
 * winCreateWindowsWindow - Create a Windows window associated with an X window
 */

void
winCreateWindowsWindow(WindowPtr pWin)
{
    winDebug("winCreateWindowsWindow - pWin:%08x XID:0x%x \n", pWin,
             pWin->drawable.id);

    if (isToplevelWindow(pWin)) {
        winCreateWindowsTopLevelWindow(pWin);
    }
    else {
        winCreateWindowsChildWindow(pWin);
    }
}

static int
winDestroyChildWindowsWindow(WindowPtr pWin, pointer data)
{
    winWindowPriv(pWin);

    winDebug("winDestroyChildWindowsWindow - pWin:%08x XID:0x%x \n", pWin,
             pWin->drawable.id);

    /* Null our handle to the Window so referencing it will cause an error */
    pWinPriv->hWnd = NULL;

#ifdef XWIN_GLX_WINDOWS
    /* No longer note WGL used on this window */
    pWinPriv->fWglUsed = FALSE;
#endif

    return WT_WALKCHILDREN;     /* continue enumeration */
}

Bool winInDestroyWindowsWindow = FALSE;

/*
 * winDestroyWindowsWindow - Destroy a Windows window associated
 * with an X window
 */
static void
winDestroyWindowsWindow(WindowPtr pWin)
{
    MSG msg;

    winWindowPriv(pWin);
    BOOL oldstate = winInDestroyWindowsWindow;
    HICON hIcon;
    HICON hIconSm;
    HWND hWnd;

    winDebug("winDestroyWindowsWindow - pWin:%08x XID:0x%x \n", pWin,
             pWin->drawable.id);

    /* Bail out if the Windows window handle is invalid */
    if (pWinPriv->hWnd == NULL)
        return;

    winInDestroyWindowsWindow = TRUE;

    /* Store the info we need to destroy after this window is gone */
    hIcon = (HICON) SendMessage(pWinPriv->hWnd, WM_GETICON, ICON_BIG, 0);
    hIconSm = (HICON) SendMessage(pWinPriv->hWnd, WM_GETICON, ICON_SMALL, 0);

    hWnd = pWinPriv->hWnd;

    /* DestroyWindow() implicitly destroys all child windows,
       so first walk over the child tree of this window, clearing
       any hWnds */
    TraverseTree(pWin, winDestroyChildWindowsWindow, 0);

    /* Destroy the Windows window */
    DestroyWindow(hWnd);

    /* Destroy any icons we created for this window */
    winDestroyIcon(hIcon);
    winDestroyIcon(hIconSm);

    /* Process all messages on our queue */
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        if (g_hDlgDepthChange == 0 || !IsDialogMessage(g_hDlgDepthChange, &msg)) {
            DispatchMessage(&msg);
        }
    }

    winInDestroyWindowsWindow = oldstate;

    winDebug("winDestroyWindowsWindow - done\n");
}

/*
 * winUpdateWindowsWindow - Redisplay/redraw a Windows window
 * associated with an X window
 */

static void
winUpdateWindowsWindow(WindowPtr pWin)
{
    winWindowPriv(pWin);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winUpdateWindowsWindow\n");
#endif

    /* Ignore the root window */
    if (pWin->parent == NULL)
        return;

    /* If it's mapped */
    if (pWin->mapped) {
        /* If it's a top-level window */
        if (isToplevelWindow(pWin)) {
            /* Create the Windows window if needed */
            if (pWinPriv->hWnd == NULL) {
                winCreateWindowsWindow(pWin);
                assert(pWinPriv->hWnd != NULL);
            }

            /* Display the window without activating it */
            if (pWin->drawable.class != InputOnly)
                ShowWindow(pWinPriv->hWnd, SW_SHOWNOACTIVATE);

        }
        /* It's not a top-level window, but we created a window for GLX */
        else if (pWinPriv->hWnd) {
            winPrivWinPtr pParentPriv = winGetWindowPriv(pWin->parent);

            /* XXX: This really belongs in winReparentWindow ??? */
            /* XXX: this assumes parent window has been made to exist */
            assert(pParentPriv->hWnd);

            /* Ensure we have the correct parent and position if reparented */
            SetParent(pWinPriv->hWnd, pParentPriv->hWnd);
            SetWindowPos(pWinPriv->hWnd, NULL,
                         pWin->drawable.x - pWin->parent->drawable.x,
                         pWin->drawable.y - pWin->parent->drawable.y, 0, 0,
                         SWP_NOSIZE | SWP_NOZORDER | SWP_SHOWWINDOW);
        }

        /* If it's top level, or a GLX window which has already been created getting mapped, show it */
        if (pWinPriv->hWnd != NULL) {
            /* Display the window without activating it */
            if (pWin->drawable.class != InputOnly)
                ShowWindow(pWinPriv->hWnd, SW_SHOWNOACTIVATE);

            /* Send first paint message */
            UpdateWindow(pWinPriv->hWnd);
        }
    }
    else if (pWinPriv->hWnd != NULL) {
        /* If it's been reparented to an unmapped window when previously mapped, destroy the Windows window */
        winDestroyWindowsWindow(pWin);
        assert(pWinPriv->hWnd == NULL);
    }

#if CYGMULTIWINDOW_DEBUG
    ErrorF("-winUpdateWindowsWindow\n");
#endif
}

/*
 * winGetWindowID - 
 */

XID
winGetWindowID(WindowPtr pWin)
{
    WindowIDPairRec wi = { pWin, 0 };
    ClientPtr c = wClient(pWin);

    /* */
    FindClientResourcesByType(c, RT_WINDOW, winFindWindow, &wi);

#if CYGMULTIWINDOW_DEBUG
    ErrorF("winGetWindowID - Window ID: %d\n", wi.id);
#endif

    return wi.id;
}

/*
 * winFindWindow - 
 */

static void
winFindWindow(pointer value, XID id, pointer cdata)
{
    WindowIDPairPtr wi = (WindowIDPairPtr) cdata;

    if (value == wi->value) {
        wi->id = id;
    }
}

/*
 * winReorderWindowsMultiWindow - 
 */

void
winReorderWindowsMultiWindow(void)
{
    HWND hwnd = NULL;
    WindowPtr pWin = NULL;
    WindowPtr pWinSib = NULL;
    XID vlist[2];
    static Bool fRestacking = FALSE;    /* Avoid recusive calls to this function */
    DWORD dwCurrentProcessID = GetCurrentProcessId();
    DWORD dwWindowProcessID = 0;

#if CYGMULTIWINDOW_DEBUG || CYGWINDOWING_DEBUG
    winTrace("winReorderWindowsMultiWindow\n");
#endif

    if (fRestacking) {
        /* It is a recusive call so immediately exit */
#if CYGWINDOWING_DEBUG
        ErrorF("winReorderWindowsMultiWindow - "
               "exit because fRestacking == TRUE\n");
#endif
        return;
    }
    fRestacking = TRUE;

    /* Loop through top level Window windows, descending in Z order */
    for (hwnd = GetTopWindow(NULL);
         hwnd; hwnd = GetNextWindow(hwnd, GW_HWNDNEXT)) {
        /* Don't take care of other Cygwin/X process's windows */
        GetWindowThreadProcessId(hwnd, &dwWindowProcessID);

        if (GetProp(hwnd, WIN_WINDOW_PROP)
            && (dwWindowProcessID == dwCurrentProcessID)
            && !IsIconic(hwnd)) {       /* ignore minimized windows */
            pWinSib = pWin;
            pWin = GetProp(hwnd, WIN_WINDOW_PROP);

            if (!pWinSib) {     /* 1st window - raise to the top */
                vlist[0] = Above;

                ConfigureWindow(pWin, CWStackMode, vlist, wClient(pWin));
            }
            else {              /* 2nd or deeper windows - just below the previous one */
                vlist[0] = winGetWindowID(pWinSib);
                vlist[1] = Below;

                ConfigureWindow(pWin, CWSibling | CWStackMode,
                                vlist, wClient(pWin));
            }
        }
    }

    fRestacking = FALSE;
}

/*
 * winMinimizeWindow - Minimize in response to WM_CHANGE_STATE
 */

void
winMinimizeWindow(Window id)
{
    WindowPtr pWin;
    winPrivWinPtr pWinPriv;

#ifdef XWIN_MULTIWINDOWEXTWM
    win32RootlessWindowPtr pRLWinPriv;
#endif
    HWND hWnd;
    ScreenPtr pScreen = NULL;
    winPrivScreenPtr pScreenPriv = NULL;
    winScreenInfo *pScreenInfo = NULL;

#if CYGWINDOWING_DEBUG
    ErrorF("winMinimizeWindow\n");
#endif

    dixLookupResourceByType((pointer) &pWin, id, RT_WINDOW, NullClient,
                            DixUnknownAccess);
    if (!pWin) {
        ErrorF("%s: NULL pWin. Leaving\n", __FUNCTION__);
        return;
    }

    pScreen = pWin->drawable.pScreen;
    if (pScreen)
        pScreenPriv = winGetScreenPriv(pScreen);
    if (pScreenPriv)
        pScreenInfo = pScreenPriv->pScreenInfo;

#ifdef XWIN_MULTIWINDOWEXTWM
    if (pScreenPriv && pScreenInfo->fInternalWM) {
        pRLWinPriv =
            (win32RootlessWindowPtr) RootlessFrameForWindow(pWin, FALSE);
        hWnd = pRLWinPriv->hWnd;
    }
    else
#else
    if (pScreenPriv)
#endif
    {
        pWinPriv = winGetWindowPriv(pWin);
        hWnd = pWinPriv->hWnd;
    }

    ShowWindow(hWnd, SW_MINIMIZE);
}

/*
 * CopyWindow - See Porting Layer Definition - p. 39
 */
void
winCopyWindowMultiWindow(WindowPtr pWin, DDXPointRec oldpt, RegionPtr oldRegion)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

#if CYGWINDOWING_DEBUG
    ErrorF("CopyWindowMultiWindow\n");
#endif
    WIN_UNWRAP(CopyWindow);
    (*pScreen->CopyWindow) (pWin, oldpt, oldRegion);
    WIN_WRAP(CopyWindow, winCopyWindowMultiWindow);
}

/*
 * MoveWindow - See Porting Layer Definition - p. 42
 */
void
winMoveWindowMultiWindow(WindowPtr pWin, int x, int y,
                         WindowPtr pSib, VTKind kind)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

#if CYGWINDOWING_DEBUG
    ErrorF("MoveWindowMultiWindow to (%d, %d)\n", x, y);
#endif

    WIN_UNWRAP(MoveWindow);
    (*pScreen->MoveWindow) (pWin, x, y, pSib, kind);
    WIN_WRAP(MoveWindow, winMoveWindowMultiWindow);
}

/*
 * ResizeWindow - See Porting Layer Definition - p. 42
 */
void
winResizeWindowMultiWindow(WindowPtr pWin, int x, int y, unsigned int w,
                           unsigned int h, WindowPtr pSib)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    winScreenPriv(pScreen);

#if CYGWINDOWING_DEBUG
    ErrorF("ResizeWindowMultiWindow to (%d, %d) - %dx%d\n", x, y, w, h);
#endif
    WIN_UNWRAP(ResizeWindow);
    (*pScreen->ResizeWindow) (pWin, x, y, w, h, pSib);
    WIN_WRAP(ResizeWindow, winResizeWindowMultiWindow);
}

/*
 * winAdjustXWindow
 *
 * Move and resize X window with respect to corresponding Windows window.
 * This is called from WM_MOVE/WM_SIZE handlers when the user performs
 * any windowing operation (move, resize, minimize, maximize, restore).
 *
 * The functionality is the inverse of winPositionWindowMultiWindow, which
 * adjusts Windows window with respect to X window.
 */
int
winAdjustXWindow(WindowPtr pWin, HWND hwnd)
{
    RECT rcDraw;                /* Rect made from pWin->drawable to be adjusted */
    RECT rcWin;                 /* The source: WindowRect from hwnd */
    DrawablePtr pDraw;
    XID vlist[4];
    LONG dX, dY, dW, dH, x, y;
    DWORD dwStyle, dwExStyle;

#define WIDTH(rc) (rc.right - rc.left)
#define HEIGHT(rc) (rc.bottom - rc.top)

#if CYGWINDOWING_DEBUG
    ErrorF("winAdjustXWindow\n");
#endif

    if (!isToplevelWindow(pWin)) {
#if 1
        ErrorF
            ("winAdjustXWindow - immediately return because not a top-level window\n");
#endif
        return 0;
    }

    if (IsIconic(hwnd)) {
#if CYGWINDOWING_DEBUG
        ErrorF("\timmediately return because the window is iconized\n");
#endif
        /*
         * If the Windows window is minimized, its WindowRect has
         * meaningless values so we don't adjust X window to it.
         */
        vlist[0] = 0;
        vlist[1] = 0;
        return ConfigureWindow(pWin, CWX | CWY, vlist, wClient(pWin));
    }

    pDraw = &pWin->drawable;

    /* Calculate the window rect from the drawable */
    x = pDraw->x + GetSystemMetrics(SM_XVIRTUALSCREEN);
    y = pDraw->y + GetSystemMetrics(SM_YVIRTUALSCREEN);
    SetRect(&rcDraw, x, y, x + pDraw->width, y + pDraw->height);
#ifdef CYGMULTIWINDOW_DEBUG
    winDebug("\tDrawable extend {%d, %d, %d, %d}, {%d, %d}\n",
             rcDraw.left, rcDraw.top, rcDraw.right, rcDraw.bottom,
             rcDraw.right - rcDraw.left, rcDraw.bottom - rcDraw.top);
#endif
    dwExStyle = GetWindowLongPtr(hwnd, GWL_EXSTYLE);
    dwStyle = GetWindowLongPtr(hwnd, GWL_STYLE);
#ifdef CYGMULTIWINDOW_DEBUG
    winDebug("\tWindowStyle: %08x %08x\n", dwStyle, dwExStyle);
#endif
    AdjustWindowRectEx(&rcDraw, dwStyle, FALSE, dwExStyle);

    /* The source of adjust */
    GetWindowRect(hwnd, &rcWin);
#ifdef CYGMULTIWINDOW_DEBUG
    winDebug("\tWindow extend {%d, %d, %d, %d}, {%d, %d}\n",
             rcWin.left, rcWin.top, rcWin.right, rcWin.bottom,
             rcWin.right - rcWin.left, rcWin.bottom - rcWin.top);
    winDebug("\tDraw extend {%d, %d, %d, %d}, {%d, %d}\n",
             rcDraw.left, rcDraw.top, rcDraw.right, rcDraw.bottom,
             rcDraw.right - rcDraw.left, rcDraw.bottom - rcDraw.top);
#endif

    if (EqualRect(&rcDraw, &rcWin)) {
        /* Bail if no adjust is needed */
#if CYGWINDOWING_DEBUG
        ErrorF("\treturn because already adjusted\n");
#endif
        return 0;
    }

    /* Calculate delta values */
    dX = rcWin.left - rcDraw.left;
    dY = rcWin.top - rcDraw.top;
    dW = WIDTH(rcWin) - WIDTH(rcDraw);
    dH = HEIGHT(rcWin) - HEIGHT(rcDraw);

    /*
     * Adjust.
     * We may only need to move (vlist[0] and [1]), or only resize
     * ([2] and [3]) but currently we set all the parameters and leave
     * the decision to ConfigureWindow.  The reason is code simplicity.
     */
    vlist[0] = pDraw->x + dX - wBorderWidth(pWin);
    vlist[1] = pDraw->y + dY - wBorderWidth(pWin);
    vlist[2] = pDraw->width + dW;
    vlist[3] = pDraw->height + dH;
#if CYGWINDOWING_DEBUG
    ErrorF("\tConfigureWindow to (%ld, %ld) - %ldx%ld\n", vlist[0], vlist[1],
           vlist[2], vlist[3]);
#endif
    return ConfigureWindow(pWin, CWX | CWY | CWWidth | CWHeight,
                           vlist, wClient(pWin));

#undef WIDTH
#undef HEIGHT
}