src/gui/kernel/qwidget_x11.cpp

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/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qevent.h"
#include "qwidget.h"
#include "qdesktopwidget.h"
#include "qapplication.h"
#include "qapplication_p.h"
#include "qnamespace.h"
#include "qpainter.h"
#include "qbitmap.h"
#include "qlayout.h"
#include "qtextcodec.h"
#include "qdatetime.h"
#include "qcursor.h"
#include "qstack.h"
#include "qcolormap.h"
#include "qdebug.h"
#include "private/qbackingstore_p.h"

extern bool qt_reuse_double_buffer; // declared in qapplication_x11.cpp
extern bool qt_sendSpontaneousEvent(QObject *, QEvent *); //qapplication_x11.cpp

#include <private/qpixmap_p.h>
#include <private/qpaintengine_x11_p.h>
#include "qt_x11_p.h"
#include "qx11info_x11.h"

#include <stdlib.h>

// defined in qapplication_x11.cpp
bool qt_wstate_iconified(WId);
void qt_updated_rootinfo();


#if !defined(QT_NO_IM)
#include "qinputcontext.h"
#include "qinputcontextfactory.h"
#endif

#include "qwidget_p.h"

#define XCOORD_MAX 16383
#define WRECT_MAX 8191

extern bool qt_nograb();

static QWidget *mouseGrb    = 0;
static QWidget *keyboardGrb = 0;


int qt_x11_create_desktop_on_screen = -1;


// MWM support
struct QtMWMHints {
    ulong flags, functions, decorations;
    long input_mode;
    ulong status;
};

enum {
    MWM_HINTS_FUNCTIONS   = (1L << 0),

    MWM_FUNC_ALL      = (1L << 0),
    MWM_FUNC_RESIZE   = (1L << 1),
    MWM_FUNC_MOVE     = (1L << 2),
    MWM_FUNC_MINIMIZE = (1L << 3),
    MWM_FUNC_MAXIMIZE = (1L << 4),
    MWM_FUNC_CLOSE    = (1L << 5),

    MWM_HINTS_DECORATIONS = (1L << 1),

    MWM_DECOR_ALL      = (1L << 0),
    MWM_DECOR_BORDER   = (1L << 1),
    MWM_DECOR_RESIZEH  = (1L << 2),
    MWM_DECOR_TITLE    = (1L << 3),
    MWM_DECOR_MENU     = (1L << 4),
    MWM_DECOR_MINIMIZE = (1L << 5),
    MWM_DECOR_MAXIMIZE = (1L << 6),

    MWM_HINTS_INPUT_MODE = (1L << 2),

    MWM_INPUT_MODELESS                  = 0L,
    MWM_INPUT_PRIMARY_APPLICATION_MODAL = 1L,
    MWM_INPUT_FULL_APPLICATION_MODAL    = 3L
};


static QtMWMHints GetMWMHints(Display *display, Window window)
{
    QtMWMHints mwmhints;

    Atom type;
    int format;
    ulong nitems, bytesLeft;
    uchar *data = 0;
    if ((XGetWindowProperty(display, window, ATOM(_MOTIF_WM_HINTS), 0, 5, false,
                            ATOM(_MOTIF_WM_HINTS), &type, &format, &nitems, &bytesLeft,
                            &data) == Success)
        && (type == ATOM(_MOTIF_WM_HINTS)
            && format == 32
            && nitems >= 5)) {
        mwmhints = *(reinterpret_cast<QtMWMHints *>(data));
    } else {
        mwmhints.flags = 0L;
        mwmhints.functions = MWM_FUNC_ALL;
        mwmhints.decorations = MWM_DECOR_ALL;
        mwmhints.input_mode = 0L;
        mwmhints.status = 0L;
    }

    if (data)
        XFree(data);

    return mwmhints;
}

static void SetMWMHints(Display *display, Window window, const QtMWMHints &mwmhints)
{
    if (mwmhints.flags != 0l) {
        XChangeProperty(display, window, ATOM(_MOTIF_WM_HINTS), ATOM(_MOTIF_WM_HINTS), 32,
                        PropModeReplace, (unsigned char *) &mwmhints, 5);
    } else {
        XDeleteProperty(display, window, ATOM(_MOTIF_WM_HINTS));
    }
}

// Returns true if we should set WM_TRANSIENT_FOR on \a w
static inline bool isTransient(const QWidget *w)
{
    return ((w->windowType() == Qt::Dialog)
            || (w->windowType() == Qt::Sheet)
            || (w->windowFlags() & Qt::MSWindowsFixedSizeDialogHint)
            || (w->windowType() == Qt::Tool)
            || (w->windowType() == Qt::SplashScreen)
            || (w->windowType() == Qt::ToolTip)
            || (w->windowType() == Qt::Drawer));
}

static void do_size_hints(QWidget* widget, QWExtra *x);

/*****************************************************************************
  QWidget member functions
 *****************************************************************************/

extern bool qt_broken_wm;

// defined in qapplication_x11.cpp
extern bool qt_net_supports(Atom);

const uint stdWidgetEventMask =                        // X event mask
        (uint)(
            KeyPressMask | KeyReleaseMask |
            ButtonPressMask | ButtonReleaseMask |
            KeymapStateMask |
            ButtonMotionMask | PointerMotionMask |
            EnterWindowMask | LeaveWindowMask |
            FocusChangeMask |
            ExposureMask |
            PropertyChangeMask |
            StructureNotifyMask
       );

const uint stdDesktopEventMask =                        // X event mask
       (uint)(
           KeymapStateMask |
           EnterWindowMask | LeaveWindowMask |
           PropertyChangeMask
      );


/*
  The qt_ functions below are implemented in qwidgetcreate_x11.cpp.
*/

Window qt_XCreateWindow(const QWidget *creator,
                         Display *display, Window parent,
                         int x, int y, uint w, uint h,
                         int borderwidth, int depth,
                         uint windowclass, Visual *visual,
                         ulong valuemask, XSetWindowAttributes *attributes);
Window qt_XCreateSimpleWindow(const QWidget *creator,
                               Display *display, Window parent,
                               int x, int y, uint w, uint h, int borderwidth,
                               ulong border, ulong background);
void qt_XDestroyWindow(const QWidget *destroyer,
                        Display *display, Window window);


static void qt_insert_sip(QWidget* scrolled_widget, int dx, int dy)
{
    QX11Data::ScrollInProgress sip = { X11->sip_serial++, scrolled_widget, dx, dy };
    X11->sip_list.append(sip);

    XClientMessageEvent client_message;
    client_message.type = ClientMessage;
    client_message.window = scrolled_widget->internalWinId();
    client_message.format = 32;
    client_message.message_type = ATOM(_QT_SCROLL_DONE);
    client_message.data.l[0] = sip.id;

    XSendEvent(X11->display, scrolled_widget->internalWinId(), False, NoEventMask,
        (XEvent*)&client_message);
}

static int qt_sip_count(QWidget* scrolled_widget)
{
    int sips=0;

    for (int i = 0; i < X11->sip_list.size(); ++i) {
        const QX11Data::ScrollInProgress &sip = X11->sip_list.at(i);
        if (sip.scrolled_widget == scrolled_widget)
            sips++;
    }

    return sips;
}

static void create_wm_client_leader()
{
    if (X11->wm_client_leader) return;

    X11->wm_client_leader =
        XCreateSimpleWindow(X11->display,
                             QX11Info::appRootWindow(),
                             0, 0, 1, 1, 0, 0, 0);

    // set client leader property to itself
    XChangeProperty(X11->display,
                     X11->wm_client_leader, ATOM(WM_CLIENT_LEADER),
                     XA_WINDOW, 32, PropModeReplace,
                     (unsigned char *)&X11->wm_client_leader, 1);

#ifndef QT_NO_SESSIONMANAGER
    // If we are session managed, inform the window manager about it
    QByteArray session = qApp->sessionId().toLatin1();
    if (!session.isEmpty()) {
        XChangeProperty(X11->display,
                         X11->wm_client_leader, ATOM(SM_CLIENT_ID),
                         XA_STRING, 8, PropModeReplace,
                         (unsigned char *)session.data(), session.size());
    }
#endif
}


Q_GUI_EXPORT void qt_x11_enforce_cursor(QWidget * w)
{
    if (!w->testAttribute(Qt::WA_WState_Created))
        return;
    if (w->testAttribute(Qt::WA_SetCursor)) {
        QCursor *oc = QApplication::overrideCursor();
        if (oc) {
            XDefineCursor(X11->display, w->internalWinId(), oc->handle());
        } else if (w->isEnabled()) {
            XDefineCursor(X11->display, w->internalWinId(), w->cursor().handle());
        } else {
            // enforce the windows behavior of clearing the cursor on
            // disabled widgets
            XDefineCursor(X11->display, w->internalWinId(), XNone);
        }
    } else {
        XDefineCursor(X11->display, w->internalWinId(), XNone);
    }
}

Q_GUI_EXPORT void qt_x11_wait_for_window_manager(QWidget* w)
{
    QApplication::flush();
    XEvent ev;
    QTime t;
    t.start();
    Q_ASSERT(w->testAttribute(Qt::WA_WState_Created));
    while (!XCheckTypedWindowEvent(X11->display, w->internalWinId(), ReparentNotify, &ev)) {
        if (XCheckTypedWindowEvent(X11->display, w->internalWinId(), MapNotify, &ev))
            break;
        if (t.elapsed() > 500)
            return; // give up, no event available
        qApp->syncX(); // non-busy wait
    }
    qApp->x11ProcessEvent(&ev);
    if (XCheckTypedWindowEvent(X11->display, w->internalWinId(), ConfigureNotify, &ev))
        qApp->x11ProcessEvent(&ev);
}

static void qt_change_net_wm_state(const QWidget* w, bool set, Atom one, Atom two = 0)
{
    if (!w->isVisible()) // not managed by the window manager
        return;

    XEvent e;
    e.xclient.type = ClientMessage;
    e.xclient.message_type = ATOM(_NET_WM_STATE);
    e.xclient.display = X11->display;
    e.xclient.window = w->internalWinId();
    e.xclient.format = 32;
    e.xclient.data.l[0] = set ? 1 : 0;
    e.xclient.data.l[1] = one;
    e.xclient.data.l[2] = two;
    e.xclient.data.l[3] = 0;
    e.xclient.data.l[4] = 0;
    XSendEvent(X11->display, RootWindow(X11->display, w->x11Info().screen()),
               false, (SubstructureNotifyMask | SubstructureRedirectMask), &e);
}

void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyOldWindow)
{
    Q_Q(QWidget);
    Qt::WindowType type = q->windowType();
    Qt::WindowFlags flags = data.window_flags;
    QWidget *parentWidget = q->parentWidget();

    if (type == Qt::ToolTip)
        flags |= Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint;

    bool topLevel = (flags & Qt::Window);
    bool popup = (type == Qt::Popup);
    bool dialog = (type == Qt::Dialog
                   || type == Qt::Sheet
                   || (flags & Qt::MSWindowsFixedSizeDialogHint));
    bool desktop = (type == Qt::Desktop);
    bool tool = (type == Qt::Tool || type == Qt::SplashScreen
                 || type == Qt::ToolTip || type == Qt::Drawer);

    if (topLevel) {
        if (parentWidget) { // if our parent stays on top, so must we
            QWidget *ptl = parentWidget->window();
            if(ptl && (ptl->windowFlags() & Qt::WindowStaysOnTopHint))
                flags |= Qt::WindowStaysOnTopHint;
        }

        if (type == Qt::SplashScreen) {
            if (qt_net_supports(ATOM(_NET_WM_WINDOW_TYPE_SPLASH))) {
                flags &= ~Qt::X11BypassWindowManagerHint;
            } else {
                flags |= Qt::X11BypassWindowManagerHint | Qt::FramelessWindowHint;
            }
        }
        // All these buttons depend on the system menu, so we enable it
        if (flags & (Qt::WindowMinimizeButtonHint
                     | Qt::WindowMaximizeButtonHint
                     | Qt::WindowContextHelpButtonHint))
            flags |= Qt::WindowSystemMenuHint;
    }


    Window parentw, destroyw = 0;
    WId id;

    // always initialize
    if (!window)
        initializeWindow = true;

    if (desktop &&
        qt_x11_create_desktop_on_screen >= 0 &&
        qt_x11_create_desktop_on_screen != xinfo.screen()) {
        // desktop on a certain screen other than the default requested
        QX11InfoData *xd = &X11->screens[qt_x11_create_desktop_on_screen];
        xinfo.setX11Data(xd);
    } else if (parentWidget && parentWidget->d_func()->xinfo.screen() != xinfo.screen()) {
        xinfo = parentWidget->d_func()->xinfo;
    }

    //get display, screen number, root window and desktop geometry for
    //the current screen
    Display *dpy = X11->display;
    int scr = xinfo.screen();
    Window root_win = RootWindow(dpy, scr);
    int sw = DisplayWidth(dpy,scr);
    int sh = DisplayHeight(dpy,scr);

    if (desktop) {                                // desktop widget
        dialog = popup = false;                        // force these flags off
        data.crect.setRect(0, 0, sw, sh);
    } else if (topLevel && !q->testAttribute(Qt::WA_Resized)) {
        data.crect.setSize(QSize(sw/2, 4*sh/10));
    }

    parentw = topLevel ? root_win : parentWidget->internalWinId();

    XSetWindowAttributes wsa;

    if (window) {                                // override the old window
        if (destroyOldWindow)
            destroyw = data.winid;
        id = window;
        setWinId(window);
        XWindowAttributes a;
        XGetWindowAttributes(dpy, window, &a);
        data.crect.setRect(a.x, a.y, a.width, a.height);

        if (a.map_state == IsUnmapped)
            q->setAttribute(Qt::WA_WState_Visible, false);
        else
            q->setAttribute(Qt::WA_WState_Visible);

        QX11InfoData* xd = xinfo.getX11Data(true);

        // find which screen the window is on...
        xd->screen = QX11Info::appScreen(); // by default, use the default :)
        int i;
        for (i = 0; i < ScreenCount(dpy); i++) {
            if (RootWindow(dpy, i) == a.root) {
                xd->screen = i;
                break;
            }
        }

        xd->depth = a.depth;
        xd->cells = DisplayCells(dpy, xd->screen);
        xd->visual = a.visual;
        xd->defaultVisual = (XVisualIDFromVisual((Visual *) a.visual) ==
                             XVisualIDFromVisual((Visual *) QX11Info::appVisual(xinfo.screen())));
        xd->colormap = a.colormap;
        xd->defaultColormap = (a.colormap == QX11Info::appColormap(xinfo.screen()));
        xinfo.setX11Data(xd);
    } else if (desktop) {                        // desktop widget
#ifdef QWIDGET_EXTRA_DEBUG
        qDebug() << "create desktop";
#endif
        id = (WId)parentw;                        // id = root window
//         QWidget *otherDesktop = find(id);        // is there another desktop?
//         if (otherDesktop && otherDesktop->testWFlags(Qt::WPaintDesktop)) {
//             otherDesktop->d->setWinId(0);        // remove id from widget mapper
//             d->setWinId(id);                     // make sure otherDesktop is
//             otherDesktop->d->setWinId(id);       // found first
//         } else {
        setWinId(id);
//         }
    } else {
#ifdef QWIDGET_EXTRA_DEBUG
        static int topLevels = 0;
        static int children = 0;
        if (parentw == root_win)
            qDebug() << "create toplevel" << ++topLevels;
        else
            qDebug() << "create child" << ++children;
#endif
        QRect safeRect = data.crect; //##### must handle huge sizes as well.... i.e. wrect
        if (safeRect.width() < 1|| safeRect.height() < 1)
            safeRect = QRect(-1000,-1000,1,1);
        if (xinfo.defaultVisual() && xinfo.defaultColormap()) {
            id = (WId)qt_XCreateSimpleWindow(q, dpy, parentw,
                                             safeRect.left(), safeRect.top(),
                                             safeRect.width(), safeRect.height(),
                                             0,
                                             BlackPixel(dpy, xinfo.screen()),
                                             WhitePixel(dpy, xinfo.screen()));
        } else {
            wsa.background_pixel = WhitePixel(dpy, xinfo.screen());
            wsa.border_pixel = BlackPixel(dpy, xinfo.screen());
            wsa.colormap = xinfo.colormap();
            id = (WId)qt_XCreateWindow(q, dpy, parentw,
                                       safeRect.left(), safeRect.top(),
                                       safeRect.width(), safeRect.height(),
                                       0, xinfo.depth(), InputOutput,
                                       (Visual *) xinfo.visual(),
                                       CWBackPixel|CWBorderPixel|CWColormap,
                                       &wsa);
        }

        setWinId(id);                                // set widget id/handle + hd
    }

#ifndef QT_NO_XRENDER
    if (picture) {
        XRenderFreePicture(X11->display, picture);
        picture = 0;
    }

    if (X11->use_xrender) {
        XRenderPictFormat *format = XRenderFindVisualFormat(dpy, (Visual *) xinfo.visual());
        if (format)
            picture = XRenderCreatePicture(dpy, id, format, 0, 0);
    }
#endif // QT_NO_XRENDER

    // NET window types
    long net_wintypes[7] = { 0, 0, 0, 0, 0, 0, 0 };
    int curr_wintype = 0;

    QtMWMHints mwmhints;
    mwmhints.flags = 0L;
    mwmhints.functions = MWM_FUNC_ALL;
    mwmhints.decorations = MWM_DECOR_ALL;
    mwmhints.input_mode = 0L;
    mwmhints.status = 0L;

    if (topLevel) {
        ulong wsa_mask = 0;
        if (type == Qt::SplashScreen) {
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
        } else { //       if (customize) {
            mwmhints.decorations = 0L;
            mwmhints.flags |= MWM_HINTS_DECORATIONS;

            if (flags & Qt::FramelessWindowHint) {
                // override netwm type - quick and easy for KDE noborder
                net_wintypes[curr_wintype++] = ATOM(_KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
            } else {
                mwmhints.decorations |= MWM_DECOR_BORDER;
                mwmhints.decorations |= MWM_DECOR_RESIZEH;

                if (flags & Qt::WindowTitleHint)
                    mwmhints.decorations |= MWM_DECOR_TITLE;

                if (flags & Qt::WindowSystemMenuHint)
                    mwmhints.decorations |= MWM_DECOR_MENU;

                if (flags & Qt::WindowMinimizeButtonHint)
                    mwmhints.decorations |= MWM_DECOR_MINIMIZE;

                if (flags & Qt::WindowMaximizeButtonHint)
                    mwmhints.decorations |= MWM_DECOR_MAXIMIZE;
            }
        }

        if (tool) {
            wsa.save_under = True;
            wsa_mask |= CWSaveUnder;
        }
        // ### need a better way to do this
        if (q->inherits("QMenu")) {
            // menu netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_MENU);
        } else if (q->inherits("QToolBar")) {
            // toolbar netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
        } else if (type == Qt::Tool || type == Qt::Drawer) {
            // utility netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
        }

        if (dialog) // dialog netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
        // normal netwm type - default
        net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);

        if (flags & Qt::X11BypassWindowManagerHint) {
            wsa.override_redirect = True;
            wsa_mask |= CWOverrideRedirect;
        }

        if (wsa_mask && initializeWindow)
            XChangeWindowAttributes(dpy, id, wsa_mask, &wsa);
    }


    if (!initializeWindow) {
        // do no initialization
    } else if (popup) {                        // popup widget
        wsa.override_redirect = True;
        wsa.save_under = True;
        XChangeWindowAttributes(dpy, id, CWOverrideRedirect | CWSaveUnder,
                                &wsa);
    } else if (topLevel && !desktop) {        // top-level widget
        if (!X11->wm_client_leader)
            create_wm_client_leader();

        // note: WM_TRANSIENT_FOR is set in QWidgetPrivate::show_sys()

        XSizeHints size_hints;
        size_hints.flags = USSize | PSize | PWinGravity;
        size_hints.x = data.crect.left();
        size_hints.y = data.crect.top();
        size_hints.width = data.crect.width();
        size_hints.height = data.crect.height();
        size_hints.win_gravity =
            QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;

        XWMHints wm_hints;                        // window manager hints
        wm_hints.flags = InputHint | StateHint | WindowGroupHint;
        wm_hints.input = True;
        wm_hints.initial_state = NormalState;
        wm_hints.window_group = X11->wm_client_leader;

        XClassHint class_hint;
        QByteArray appName = qAppName().toLatin1();
        class_hint.res_name = appName.data(); // application name
        class_hint.res_class = const_cast<char *>(QX11Info::appClass());   // application class

        XSetWMProperties(dpy, id, 0, 0, 0, 0, &size_hints, &wm_hints, &class_hint);

        XResizeWindow(dpy, id,
                      qBound(1, data.crect.width(), XCOORD_MAX),
                      qBound(1, data.crect.height(), XCOORD_MAX));
        XStoreName(dpy, id, appName.data());
        Atom protocols[4];
        int n = 0;
        protocols[n++] = ATOM(WM_DELETE_WINDOW);        // support del window protocol
        protocols[n++] = ATOM(WM_TAKE_FOCUS);                // support take focus window protocol
        protocols[n++] = ATOM(_NET_WM_PING);                // support _NET_WM_PING protocol
        if (flags & Qt::WindowContextHelpButtonHint)
            protocols[n++] = ATOM(_NET_WM_CONTEXT_HELP);
        XSetWMProtocols(dpy, id, protocols, n);

        // set mwm hints
        SetMWMHints(dpy, id, mwmhints);

        // set _NET_WM_WINDOW_TYPE
        if (curr_wintype > 0)
            XChangeProperty(dpy, id, ATOM(_NET_WM_WINDOW_TYPE), XA_ATOM, 32, PropModeReplace,
                            (unsigned char *) net_wintypes, curr_wintype);
        else
            XDeleteProperty(dpy, id, ATOM(_NET_WM_WINDOW_TYPE));

        // set _NET_WM_PID
        long curr_pid = getpid();
        XChangeProperty(dpy, id, ATOM(_NET_WM_PID), XA_CARDINAL, 32, PropModeReplace,
                        (unsigned char *) &curr_pid, 1);

        // when we create a toplevel widget, the frame strut should be dirty
        data.fstrut_dirty = 1;

        // declare the widget's object name as window role
        QByteArray objName = q->objectName().toLocal8Bit();
        XChangeProperty(dpy, id,
                        ATOM(WM_WINDOW_ROLE), XA_STRING, 8, PropModeReplace,
                        (unsigned char *)objName.constData(), objName.length());

        // set client leader property
        XChangeProperty(dpy, id, ATOM(WM_CLIENT_LEADER),
                        XA_WINDOW, 32, PropModeReplace,
                        (unsigned char *)&X11->wm_client_leader, 1);
    } else {
        // non-toplevel widgets don't have a frame, so no need to
        // update the strut
        data.fstrut_dirty = 0;
    }

    if (initializeWindow) {
        // don't erase when resizing
        wsa.bit_gravity = QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;
        XChangeWindowAttributes(dpy, id, CWBitGravity, &wsa);
    }

    // set X11 event mask
    if (desktop) {
//         QWidget* main_desktop = find(id);
//         if (main_desktop->testWFlags(Qt::WPaintDesktop))
//             XSelectInput(dpy, id, stdDesktopEventMask | ExposureMask);
//         else
        XSelectInput(dpy, id, stdDesktopEventMask);
    } else {
        XSelectInput(dpy, id, stdWidgetEventMask);
#if !defined (QT_NO_TABLET)
        QTabletDeviceDataList *tablet_list = qt_tablet_devices();
        for (int i = 0; i < tablet_list->size(); ++i) {
            QTabletDeviceData tablet = tablet_list->at(i);
            XSelectExtensionEvent(dpy, id, reinterpret_cast<XEventClass*>(tablet.eventList),
                                  tablet.eventCount);
        }
#endif
    }

    if (desktop) {
        q->setAttribute(Qt::WA_WState_Visible);
    } else if (topLevel) {                        // set X cursor
        q->setAttribute(Qt::WA_SetCursor);
        if (initializeWindow) {
            qt_x11_enforce_cursor(q);

            if (QTLWExtra *topData = maybeTopData())
                setWindowTitle_helper(topData->caption);

            X11->dndEnable(q, true); //always enable dnd: it's not worth the effort to maintain the state

            if (maybeTopData() && maybeTopData()->opacity != 255)
                q->setWindowOpacity(maybeTopData()->opacity/255.);

        }
    } else {
        if (q->testAttribute(Qt::WA_SetCursor))
            qt_x11_enforce_cursor(q);
    }

    if (extra && !extra->mask.isEmpty())
        XShapeCombineRegion(X11->display, q->internalWinId(), ShapeBounding, 0, 0,
                            extra->mask.handle(), ShapeSet);

    if (q->hasFocus() && q->testAttribute(Qt::WA_InputMethodEnabled)) {
        QInputContext *inputContext = q->inputContext();
        if (inputContext)
            inputContext->setFocusWidget(q);
    }

    if (destroyw)
        qt_XDestroyWindow(q, dpy, destroyw);

    // newly created windows are positioned at the window system's
    // (0,0) position. If the parent uses wrect mapping to expand the
    // coordinate system, we must also adjust this widget's window
    // system position
    if (!topLevel && !parentWidget->data->wrect.topLeft().isNull())
        setWSGeometry();
}

void QWidget::destroy(bool destroyWindow, bool destroySubWindows)
{
    Q_D(QWidget);
    if (!isWindow() && parentWidget())
        parentWidget()->d_func()->invalidateBuffer(geometry());
    d->deactivateWidgetCleanup();
    if (testAttribute(Qt::WA_WState_Created)) {
        setAttribute(Qt::WA_WState_Created, false);
        QObjectList childList = children();
        for (int i = 0; i < childList.size(); ++i) { // destroy all widget children
            register QObject *obj = childList.at(i);
            if (obj->isWidgetType())
                static_cast<QWidget*>(obj)->destroy(destroySubWindows,
                                                    destroySubWindows);
        }
        if (mouseGrb == this)
            releaseMouse();
        if (keyboardGrb == this)
            releaseKeyboard();
        if (isWindow())
            X11->deferred_map.removeAll(this);
        if (isModal()) {
            // just be sure we leave modal
            QApplicationPrivate::leaveModal(this);
        }
        else if ((windowType() == Qt::Popup))
            qApp->d_func()->closePopup(this);

#ifndef QT_NO_XRENDER
        if (d->picture) {
            if (destroyWindow)
                XRenderFreePicture(X11->display, d->picture);
            d->picture = 0;
        }
#endif // QT_NO_XRENDER

        if ((windowType() == Qt::Desktop)) {
            if (acceptDrops())
                X11->dndEnable(this, false);
        } else {
            if (destroyWindow)
                qt_XDestroyWindow(this, X11->display, data->winid);
        }
        d->setWinId(0);

        extern void qPRCleanup(QWidget *widget); // from qapplication_x11.cpp
        if (testAttribute(Qt::WA_WState_Reparented))
            qPRCleanup(this);

        if(d->ic) {
            delete d->ic;
        } else {
            // release previous focus information participating with
            // preedit preservation of qic
            QInputContext *qic = inputContext();
            if (qic)
                qic->widgetDestroyed(this);
        }
    }
}

void QWidgetPrivate::setParent_sys(QWidget *parent, Qt::WindowFlags f)
{
    Q_Q(QWidget);
    QTLWExtra *topData = maybeTopData();
    bool wasCreated = q->testAttribute(Qt::WA_WState_Created);
    if (q->isVisible() && q->parentWidget() && parent != q->parentWidget())
        q->parentWidget()->d_func()->invalidateBuffer(q->geometry());
    extern void qPRCreate(const QWidget *, Window);
    QCursor oldcurs;

    // dnd unregister (we will register again below)
    if (q->testAttribute(Qt::WA_DropSiteRegistered))
        q->setAttribute(Qt::WA_DropSiteRegistered, false);

    // if we are a top then remove our dnd prop for now
    // it will get rest later
    if (q->isWindow() && wasCreated)
        X11->dndEnable(q, false);

//     QWidget *oldparent = q->parentWidget();
    WId old_winid = wasCreated ? data.winid : 0;
    if ((q->windowType() == Qt::Desktop))
        old_winid = 0;
    setWinId(0);

#ifndef QT_NO_XRENDER
    if (picture) {
        XRenderFreePicture(X11->display, picture);
        picture = 0;
    }
#endif
    // hide and reparent our own window away. Otherwise we might get
    // destroyed when emitting the child remove event below. See QWorkspace.
    if (wasCreated) {
        XUnmapWindow(X11->display, old_winid);
        XReparentWindow(X11->display, old_winid, RootWindow(X11->display, xinfo.screen()), 0, 0);
    }
    if (topData) {
        topData->parentWinId = 0;
        // zero the frame strut and mark it dirty
        topData->frameStrut.setCoords(0, 0, 0, 0);

        // reparenting from top-level, make sure show() works again
        topData->waitingForMapNotify = 0;
        topData->validWMState = 0;
    }
    data.fstrut_dirty = (!parent || (f & Qt::Window)); // toplevels get a dirty framestrut

    QObjectPrivate::setParent_helper(parent);
    bool explicitlyHidden = q->testAttribute(Qt::WA_WState_Hidden) && q->testAttribute(Qt::WA_WState_ExplicitShowHide);

    data.window_flags = f;
    q->setAttribute(Qt::WA_WState_Created, false);
    q->setAttribute(Qt::WA_WState_Visible, false);
    q->setAttribute(Qt::WA_WState_Hidden, false);
    adjustFlags(data.window_flags, q);
    // keep compatibility with previous versions, we need to preserve the created state
    // (but we recreate the winId for the widget being reparented, again for compability)
    if (wasCreated || (!q->isWindow() && parent->testAttribute(Qt::WA_WState_Created)))
        createWinId();
    if (q->isWindow() || (!parent || parent->isVisible()) || explicitlyHidden)
        q->setAttribute(Qt::WA_WState_Hidden);
    q->setAttribute(Qt::WA_WState_ExplicitShowHide, explicitlyHidden);

    if (wasCreated) {
        QObjectList chlist = q->children();
        for (int i = 0; i < chlist.size(); ++i) { // reparent children
            QObject *obj = chlist.at(i);
            if (obj->isWidgetType()) {
                QWidget *w = (QWidget *)obj;
                if (!w->testAttribute(Qt::WA_WState_Created))
                    continue;
                if (xinfo.screen() != w->d_func()->xinfo.screen()) {
                    // ### force setParent() to not shortcut out (because
                    // ### we're setting the parent to the current parent)
                    w->d_func()->parent = 0;
                    w->setParent(q);
                } else if (!w->isWindow()) {
                    w->d_func()->invalidateBuffer(w->rect());
                    XReparentWindow(X11->display, w->internalWinId(), q->internalWinId(),
                                    w->geometry().x(), w->geometry().y());
                } else if (isTransient(w)) {
                    /*
                      when reparenting toplevel windows with toplevel-transient children,
                      we need to make sure that the window manager gets the updated
                      WM_TRANSIENT_FOR information... unfortunately, some window managers
                      don't handle changing WM_TRANSIENT_FOR before the toplevel window is
                      visible, so we unmap and remap all toplevel-transient children *after*
                      the toplevel parent has been mapped.  thankfully, this is easy in Qt :)

                      note that the WM_TRANSIENT_FOR hint is actually updated in
                      QWidgetPrivate::show_sys()
                    */
                    XUnmapWindow(X11->display, w->internalWinId());
                    QApplication::postEvent(w, new QEvent(QEvent::ShowWindowRequest));
                }
            }

        }
        qPRCreate(q, old_winid);
        updateSystemBackground();


        if (old_winid)
            qt_XDestroyWindow(q, X11->display, old_winid);

    }


    // check if we need to register our dropsite
    if (q->testAttribute(Qt::WA_AcceptDrops)
        || (!q->isWindow() && q->parentWidget() && q->parentWidget()->testAttribute(Qt::WA_DropSiteRegistered))) {
        q->setAttribute(Qt::WA_DropSiteRegistered, true);
    }
#if !defined(QT_NO_IM)
    ic = 0;
#endif
    invalidateBuffer(q->rect());
}

QPoint QWidget::mapToGlobal(const QPoint &pos) const
{
    Q_D(const QWidget);
    if (!testAttribute(Qt::WA_WState_Created)) {
        QPoint p = pos + data->crect.topLeft();
        //cannot trust that !isWindow() implies parentWidget() before create
        return (isWindow() || !parentWidget()) ?  p : parentWidget()->mapToGlobal(p);
    }
    int           x, y;
    Window child;
    QPoint p = d->mapToWS(pos);
    XTranslateCoordinates(X11->display, internalWinId(),
                          QApplication::desktop()->screen(d->xinfo.screen())->internalWinId(),
                          p.x(), p.y(), &x, &y, &child);
    return QPoint(x, y);
}

QPoint QWidget::mapFromGlobal(const QPoint &pos) const
{
    Q_D(const QWidget);
    if (!testAttribute(Qt::WA_WState_Created)) {
        //cannot trust that !isWindow() implies parentWidget() before create
        QPoint p = (isWindow() || !parentWidget()) ?  pos : parentWidget()->mapFromGlobal(pos);
        return p - data->crect.topLeft();
    }
    int           x, y;
    Window child;
    XTranslateCoordinates(X11->display,
                          QApplication::desktop()->screen(d->xinfo.screen())->internalWinId(),
                          internalWinId(), pos.x(), pos.y(), &x, &y, &child);
    return d->mapFromWS(QPoint(x, y));
}

void QWidgetPrivate::updateSystemBackground()
{
    Q_Q(QWidget);
    if (!q->testAttribute(Qt::WA_WState_Created))
        return;
    QBrush brush = q->palette().brush(QPalette::Active, q->backgroundRole());
    Qt::WindowType type = q->windowType();
    if (brush.style() == Qt::NoBrush
        || q->testAttribute(Qt::WA_NoSystemBackground)
        || q->testAttribute(Qt::WA_UpdatesDisabled)
        || type == Qt::Popup || type == Qt::ToolTip
        )
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(), XNone);
    else if (brush.style() == Qt::SolidPattern && brush.isOpaque())
        XSetWindowBackground(X11->display, q->internalWinId(),
                             QColormap::instance(xinfo.screen()).pixel(brush.color()));
    else if (isBackgroundInherited())
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(), ParentRelative);
    else if (brush.style() == Qt::TexturePattern)
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(),
                                   brush.texture().data->x11ConvertToDefaultDepth());
    else
        XSetWindowBackground(X11->display, q->internalWinId(),
                             QColormap::instance(xinfo.screen()).pixel(brush.color()));
}

void QWidgetPrivate::setCursor_sys(const QCursor &)
{
    Q_Q(QWidget);
    qt_x11_enforce_cursor(q);
    XFlush(X11->display);
}

void QWidgetPrivate::unsetCursor_sys()
{
    Q_Q(QWidget);
    qt_x11_enforce_cursor(q);
    XFlush(X11->display);
}

static XTextProperty*
qstring_to_xtp(const QString& s)
{
    static XTextProperty tp = { 0, 0, 0, 0 };
    static bool free_prop = true; // we can't free tp.value in case it references
    // the data of the static QCString below.
    if (tp.value) {
        if (free_prop)
            XFree(tp.value);
        tp.value = 0;
        free_prop = true;
    }

    static const QTextCodec* mapper = QTextCodec::codecForLocale();
    int errCode = 0;
    if (mapper) {
        QByteArray mapped = mapper->fromUnicode(s);
        char* tl[2];
        tl[0] = mapped.data();
        tl[1] = 0;
        errCode = XmbTextListToTextProperty(X11->display, tl, 1, XStdICCTextStyle, &tp);
#if defined(QT_DEBUG)
        if (errCode < 0)
            qDebug("qstring_to_xtp result code %d", errCode);
#endif
    }
    if (!mapper || errCode < 0) {
        static QByteArray qcs;
        qcs = s.toAscii();
        tp.value = (uchar*)qcs.data();
        tp.encoding = XA_STRING;
        tp.format = 8;
        tp.nitems = qcs.length();
        free_prop = false;
    }

    // ### If we knew WM could understand unicode, we could use
    // ### a much simpler, cheaper encoding...
    /*
        tp.value = (XChar2b*)s.unicode();
        tp.encoding = XA_UNICODE; // wish
        tp.format = 16;
        tp.nitems = s.length();
    */

    return &tp;
}

void QWidgetPrivate::setWindowTitle_sys(const QString &caption)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    XSetWMName(X11->display, q->internalWinId(), qstring_to_xtp(caption));

    QByteArray net_wm_name = caption.toUtf8();
    XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_NAME), ATOM(UTF8_STRING), 8,
                    PropModeReplace, (unsigned char *)net_wm_name.data(), net_wm_name.size());
}

void QWidgetPrivate::setWindowIcon_sys(bool forceReset)
{
    Q_Q(QWidget);
    if (!q->testAttribute(Qt::WA_WState_Created))
        return;
    QTLWExtra *topData = this->topData();
    if (topData->iconPixmap && !forceReset)
        // already been set
        return;

    XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
    XWMHints wm_hints;
    if (!h) {
        h = &wm_hints;
        h->flags = 0;
    }

    QIcon icon = q->windowIcon();
    QSize size = icon.actualSize(QSize(64, 64));
    if (!icon.isNull() && !size.isEmpty()) {
        QPixmap pixmap = icon.pixmap(size);

        // set the _NET_WM_ICON property
        QImage image = pixmap.toImage().convertToFormat(QImage::Format_ARGB32);
        QVector<long> icon_data(2 + image.width()*image.height());

        icon_data[0] = image.width();
        icon_data[1] = image.height();

        if (sizeof(long) == sizeof(quint32)) {
            memcpy(icon_data.data() + 2, image.scanLine(0), image.numBytes());
        } else {
            for (int y = 0; y < image.height(); ++y) {
                uint *scanLine = reinterpret_cast<uint *>(image.scanLine(y));
                for (int x = 0; x < image.width(); ++x)
                    icon_data[2 + y*image.width() + x] = scanLine[x];
            }
        }

        XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_ICON), XA_CARDINAL, 32,
                        PropModeReplace, (unsigned char *) icon_data.data(),
                        icon_data.size());
        /*
          if the app is not using the default visual, convert the icon
          to 1bpp as stated in the ICCCM section 4.1.2.4; otherwise,
          create the icon pixmap in the default depth (even though
          this violates the ICCCM)
        */
        if (!QX11Info::appDefaultVisual(xinfo.screen())
            || !QX11Info::appDefaultColormap(xinfo.screen())) {
            // non-default visual/colormap, use 1bpp bitmap
            if (!forceReset || !topData->iconPixmap)
                topData->iconPixmap = new QBitmap(pixmap);
            h->icon_pixmap = topData->iconPixmap->handle();
        } else {
            // default depth, use a normal pixmap (even though this
            // violates the ICCCM)
            if (!forceReset || !topData->iconPixmap)
                topData->iconPixmap = new QPixmap(pixmap);
            h->icon_pixmap = topData->iconPixmap->data->x11ConvertToDefaultDepth();
        }
        h->flags |= IconPixmapHint;

        QBitmap mask = topData->iconPixmap->mask();
        if (!mask.isNull()) {
            if (!topData->iconMask)
                topData->iconMask = new QBitmap;
            *topData->iconMask = mask;
            h->icon_mask = topData->iconMask->handle();
            h->flags |= IconMaskHint;
        }
    } else {
        h->flags &= ~(IconPixmapHint | IconMaskHint);
    }

    XSetWMHints(X11->display, q->internalWinId(), h);
    if (h != &wm_hints)
        XFree((char *)h);
}

void QWidgetPrivate::setWindowIconText_sys(const QString &iconText)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    XSetWMIconName(X11->display, q->internalWinId(), qstring_to_xtp(iconText));

    QByteArray icon_name = iconText.toUtf8();
    XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_ICON_NAME), ATOM(UTF8_STRING), 8,
                    PropModeReplace, (unsigned char *) icon_name.constData(), icon_name.size());
}


void QWidget::grabMouse()
{
    if (isVisible() && !qt_nograb()) {
        if (mouseGrb)
            mouseGrb->releaseMouse();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
#ifndef QT_NO_DEBUG
        int status =
#endif
            XGrabPointer(X11->display, internalWinId(), False,
                          (uint)(ButtonPressMask | ButtonReleaseMask |
                                  PointerMotionMask | EnterWindowMask |
                                  LeaveWindowMask),
                          GrabModeAsync, GrabModeAsync,
                          XNone, XNone, X11->time);
#ifndef QT_NO_DEBUG
        if (status) {
            const char *s =
                status == GrabNotViewable ? "\"GrabNotViewable\"" :
                status == AlreadyGrabbed  ? "\"AlreadyGrabbed\"" :
                status == GrabFrozen      ? "\"GrabFrozen\"" :
                status == GrabInvalidTime ? "\"GrabInvalidTime\"" :
                "<?>";
            qWarning("QWidget::grabMouse: Failed with %s", s);
        }
#endif
        mouseGrb = this;
    }
}

void QWidget::grabMouse(const QCursor &cursor)
{
    if (!qt_nograb()) {
        if (mouseGrb)
            mouseGrb->releaseMouse();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
#ifndef QT_NO_DEBUG
        int status =
#endif
        XGrabPointer(X11->display, internalWinId(), False,
                      (uint)(ButtonPressMask | ButtonReleaseMask |
                             PointerMotionMask | EnterWindowMask | LeaveWindowMask),
                      GrabModeAsync, GrabModeAsync,
                      XNone, cursor.handle(), X11->time);
#ifndef QT_NO_DEBUG
        if (status) {
            const char *s =
                status == GrabNotViewable ? "\"GrabNotViewable\"" :
                status == AlreadyGrabbed  ? "\"AlreadyGrabbed\"" :
                status == GrabFrozen      ? "\"GrabFrozen\"" :
                status == GrabInvalidTime ? "\"GrabInvalidTime\"" :
                                            "<?>";
            qWarning("QWidget::grabMouse: Failed with %s", s);
        }
#endif
        mouseGrb = this;
    }
}

void QWidget::releaseMouse()
{
    if (!qt_nograb() && mouseGrb == this) {
        XUngrabPointer(X11->display, X11->time);
        XFlush(X11->display);
        mouseGrb = 0;
    }
}

void QWidget::grabKeyboard()
{
    if (!qt_nograb()) {
        if (keyboardGrb)
            keyboardGrb->releaseKeyboard();
        XGrabKeyboard(X11->display, data->winid, False, GrabModeAsync, GrabModeAsync,
                      X11->time);
        keyboardGrb = this;
    }
}

void QWidget::releaseKeyboard()
{
    if (!qt_nograb() && keyboardGrb == this) {
        XUngrabKeyboard(X11->display, X11->time);
        keyboardGrb = 0;
    }
}


QWidget *QWidget::mouseGrabber()
{
    return mouseGrb;
}

QWidget *QWidget::keyboardGrabber()
{
    return keyboardGrb;
}

void QWidget::activateWindow()
{
    Q_D(QWidget);
    QWidget *tlw = window();
    if (tlw->isVisible() && !tlw->d_func()->topData()->embedded && !X11->deferred_map.contains(tlw)) {
        XSetInputFocus(X11->display, tlw->internalWinId(), XRevertToParent, X11->time);
        d->focusInputContext();
    }
}

void QWidgetPrivate::dirtyWidget_sys(const QRegion &rgn)
{
    Q_Q(QWidget);
    if (!rgn.isEmpty()) {
        dirtyOnScreen += rgn;
        QApplication::postEvent(q, new QEvent(QEvent::UpdateRequest));
    }
}

void QWidgetPrivate::cleanWidget_sys(const QRegion& rgn)
{
    dirtyOnScreen -= rgn;
}

void QWidget::setWindowState(Qt::WindowStates newstate)
{
    Q_D(QWidget);
    bool needShow = false;
    Qt::WindowStates oldstate = windowState();
    if (oldstate == newstate)
        return;
    if (isWindow()) {
        // Ensure the initial size is valid, since we store it as normalGeometry below.
        if (!testAttribute(Qt::WA_Resized) && !isVisible())
            adjustSize();

        QTLWExtra *top = d->topData();

        if ((oldstate & Qt::WindowMaximized) != (newstate & Qt::WindowMaximized)) {
            if (qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                && qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_VERT))) {
                if ((newstate & Qt::WindowMaximized) && !(oldstate & Qt::WindowFullScreen))
                    top->normalGeometry = geometry();
                qt_change_net_wm_state(this, (newstate & Qt::WindowMaximized),
                                       ATOM(_NET_WM_STATE_MAXIMIZED_HORZ),
                                       ATOM(_NET_WM_STATE_MAXIMIZED_VERT));
            } else if (! (newstate & Qt::WindowFullScreen)) {
                if (newstate & Qt::WindowMaximized) {
                    // save original geometry
                    const QRect normalGeometry = geometry();

                    if (isVisible()) {
                        data->fstrut_dirty = true;
                        const QRect maxRect = QApplication::desktop()->availableGeometry(this);
                        const QRect r = top->normalGeometry;
                        const QRect fs = d->frameStrut();
                        setGeometry(maxRect.x() + fs.left(),
                                    maxRect.y() + fs.top(),
                                    maxRect.width() - fs.left() - fs.right(),
                                    maxRect.height() - fs.top() - fs.bottom());
                        top->normalGeometry = r;
                    }

                    if (top->normalGeometry.width() < 0)
                        top->normalGeometry = normalGeometry;
                } else {
                    // restore original geometry
                    setGeometry(top->normalGeometry);
                }
            }
        }

        if ((oldstate & Qt::WindowFullScreen) != (newstate & Qt::WindowFullScreen)) {
            if (qt_net_supports(ATOM(_NET_WM_STATE_FULLSCREEN))) {
                if (newstate & Qt::WindowFullScreen)
                    top->normalGeometry = geometry();
                qt_change_net_wm_state(this, (newstate & Qt::WindowFullScreen),
                                       ATOM(_NET_WM_STATE_FULLSCREEN));
            } else {
                needShow = isVisible();

                if (newstate & Qt::WindowFullScreen) {
                    data->fstrut_dirty = true;
                    const QRect normalGeometry = geometry();
                    const QPoint fullScreenOffset = d->frameStrut().topLeft();

                    top->savedFlags = windowFlags();
                    setParent(0, Qt::Window | Qt::FramelessWindowHint);
                    const QRect r = top->normalGeometry;
                    setGeometry(qApp->desktop()->screenGeometry(this));
                    top->normalGeometry = r;

                    if (top->normalGeometry.width() < 0) {
                        top->normalGeometry = normalGeometry;
                        top->fullScreenOffset = fullScreenOffset;
                    }
                } else {
                    setParent(0, top->savedFlags);

                    if (newstate & Qt::WindowMaximized) {
                        // from fullscreen to maximized
                        data->fstrut_dirty = true;
                        const QRect maxRect = QApplication::desktop()->availableGeometry(this);
                        const QRect r = top->normalGeometry;
                        const QRect fs = d->frameStrut();
                        setGeometry(maxRect.x() + fs.left(),
                                    maxRect.y() + fs.top(),
                                    maxRect.width() - fs.left() - fs.right(),
                                    maxRect.height() - fs.top() - fs.bottom());
                        top->normalGeometry = r;
                    } else {
                        // restore original geometry
                        setGeometry(top->normalGeometry.adjusted(-top->fullScreenOffset.x(),
                                                                 -top->fullScreenOffset.y(),
                                                                 -top->fullScreenOffset.x(),
                                                                 -top->fullScreenOffset.y()));
                    }
                }
            }
        }

        createWinId();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
        if ((oldstate & Qt::WindowMinimized) != (newstate & Qt::WindowMinimized)) {
            if (isVisible()) {
                if (newstate & Qt::WindowMinimized) {
                    XEvent e;
                    e.xclient.type = ClientMessage;
                    e.xclient.message_type = ATOM(WM_CHANGE_STATE);
                    e.xclient.display = X11->display;
                    e.xclient.window = data->winid;
                    e.xclient.format = 32;
                    e.xclient.data.l[0] = IconicState;
                    e.xclient.data.l[1] = 0;
                    e.xclient.data.l[2] = 0;
                    e.xclient.data.l[3] = 0;
                    e.xclient.data.l[4] = 0;
                    XSendEvent(X11->display,
                               RootWindow(X11->display,d->xinfo.screen()),
                               False, (SubstructureNotifyMask|SubstructureRedirectMask), &e);
                } else {
                    setAttribute(Qt::WA_Mapped);
                    XMapWindow(X11->display, internalWinId());
                }
            }

            needShow = false;
        }
    }

    data->window_state = newstate;

    if (needShow)
        show();

    if (newstate & Qt::WindowActive)
        activateWindow();

    QWindowStateChangeEvent e(oldstate);
    QApplication::sendEvent(this, &e);
}

void QWidgetPrivate::show_sys()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    if (q->isWindow()) {
        XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
        XWMHints  wm_hints;
        bool got_hints = h != 0;
        if (!got_hints) {
            h = &wm_hints;
            h->flags = 0;
        }
        h->initial_state = q->isMinimized() ? IconicState : NormalState;
        h->flags |= StateHint;
        XSetWMHints(X11->display, q->internalWinId(), h);
        if (got_hints)
            XFree((char *)h);

        // update WM_NORMAL_HINTS
        do_size_hints(q, extra);

        // udpate WM_TRANSIENT_FOR
        if (isTransient(q)) {
            QWidget *p = q->parentWidget();
            if (p)
                p = p->window();
            if (p) {
                // transient for window
                XSetTransientForHint(X11->display, q->internalWinId(), p->internalWinId());
            } else {
                // transient for group
                XSetTransientForHint(X11->display, q->internalWinId(), X11->wm_client_leader);
            }
        }

        // update _MOTIF_WM_HINTS
        QtMWMHints mwmhints = GetMWMHints(X11->display, q->internalWinId());

        if (data.window_modality != Qt::NonModal) {
            switch (data.window_modality) {
            case Qt::WindowModal:
                mwmhints.input_mode = MWM_INPUT_PRIMARY_APPLICATION_MODAL;
                break;
            case Qt::ApplicationModal:
            default:
                mwmhints.input_mode = MWM_INPUT_FULL_APPLICATION_MODAL;
                break;
            }
            mwmhints.flags |= MWM_HINTS_INPUT_MODE;
        } else {
            mwmhints.input_mode = MWM_INPUT_MODELESS;
            mwmhints.flags &= ~MWM_HINTS_INPUT_MODE;
        }

        if (q->minimumSize() == q->maximumSize()) {
            // fixed size, remove the resize handle (since mwm/dtwm
            // isn't smart enough to do it itself)
            mwmhints.flags |= MWM_HINTS_FUNCTIONS;
            if (mwmhints.functions == MWM_FUNC_ALL) {
                mwmhints.functions = (MWM_FUNC_MOVE
                                      | MWM_FUNC_MINIMIZE
                                      | MWM_FUNC_MAXIMIZE
                                      | MWM_FUNC_CLOSE);
            } else {
                mwmhints.functions &= ~MWM_FUNC_RESIZE;
            }

            mwmhints.flags |= MWM_HINTS_DECORATIONS;
            if (mwmhints.decorations == MWM_DECOR_ALL) {
                mwmhints.decorations = (MWM_DECOR_BORDER
                                        | MWM_DECOR_TITLE
                                        | MWM_DECOR_MENU
                                        | MWM_DECOR_MINIMIZE
                                        | MWM_DECOR_MAXIMIZE);
            } else {
                mwmhints.decorations &= ~MWM_DECOR_RESIZEH;
            }
        }

        SetMWMHints(X11->display, q->internalWinId(), mwmhints);

        // set _NET_WM_STATE
        Atom net_winstates[6] = { 0, 0, 0, 0, 0, 0 };
        int curr_winstate = 0;

        Qt::WindowFlags flags = q->windowFlags();
        if (flags & Qt::WindowStaysOnTopHint) {
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_ABOVE);
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_STAYS_ON_TOP);
        }
        if (q->isFullScreen()) {
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_FULLSCREEN);
        }
        if (q->isMaximized()) {
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_MAXIMIZED_HORZ);
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_MAXIMIZED_VERT);
        }
        if (data.window_modality != Qt::NonModal) {
            net_winstates[curr_winstate++] = ATOM(_NET_WM_STATE_MODAL);
        }

        if (curr_winstate > 0) {
            XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_STATE), XA_ATOM,
                            32, PropModeReplace, (unsigned char *) net_winstates, curr_winstate);
        } else {
            XDeleteProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_STATE));
        }

        // set _NET_WM_USER_TIME
        if (X11->userTime != CurrentTime) {
            XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_USER_TIME), XA_CARDINAL,
                            32, PropModeReplace, (unsigned char *) &X11->userTime, 1);
        }

        if (!topData()->embedded
            && (topData()->validWMState || topData()->waitingForMapNotify)
            && !q->isMinimized()) {
            X11->deferred_map.append(q);
            return;
        }

        if (q->isMaximized() && !q->isFullScreen()
            && !(qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                 && qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_VERT)))) {
            XMapWindow(X11->display, q->internalWinId());
            data.fstrut_dirty = true;
            qt_x11_wait_for_window_manager(q);

            // if the wm was not smart enough to adjust our size, do that manually
            QRect maxRect = QApplication::desktop()->availableGeometry(q);

            QTLWExtra *top = topData();
            QRect normalRect = top->normalGeometry;
            const QRect fs = frameStrut();

            q->setGeometry(maxRect.x() + fs.left(),
                           maxRect.y() + fs.top(),
                           maxRect.width() - fs.left() - fs.right(),
                           maxRect.height() - fs.top() - fs.bottom());

            // restore the original normalGeometry
            top->normalGeometry = normalRect;
            // internalSetGeometry() clears the maximized flag... make sure we set it back
            data.window_state = data.window_state | Qt::WindowMaximized;
            q->setAttribute(Qt::WA_Mapped);
            return;
        }

        if (q->isFullScreen() && !qt_net_supports(ATOM(_NET_WM_STATE_FULLSCREEN))) {
            XMapWindow(X11->display, q->internalWinId());
            qt_x11_wait_for_window_manager(q);
            q->setAttribute(Qt::WA_Mapped);
            return;
        }
    }

    invalidateBuffer(q->rect());

    if (q->testAttribute(Qt::WA_OutsideWSRange))
        return;
    q->setAttribute(Qt::WA_Mapped);
    if (q->isWindow())
        topData()->waitingForMapNotify = 1;

    if (!q->isWindow()
        && (!q->autoFillBackground()
            || q->palette().brush(q->backgroundRole()).style() == Qt::LinearGradientPattern)) {
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(), XNone);
        XMapWindow(X11->display, q->internalWinId());
        updateSystemBackground();
        return;
    }
    XMapWindow(X11->display, q->internalWinId());

    // Freedesktop.org Startup Notification
    if (X11->startupId && q->isWindow()) {
        QByteArray message("remove: ID=");
        message.append(X11->startupId);
        sendStartupMessage(message.constData());
        X11->startupId = 0;
    }
}

void QWidgetPrivate::sendStartupMessage(const char *message) const
{
    Q_Q(const QWidget);

    if (!message)
        return;

    XEvent xevent;
    xevent.xclient.type = ClientMessage;
    xevent.xclient.message_type = ATOM(_NET_STARTUP_INFO_BEGIN);
    xevent.xclient.display = X11->display;
    xevent.xclient.window = q->internalWinId();
    xevent.xclient.format = 8;

    Window rootWindow = RootWindow(X11->display, DefaultScreen(X11->display));
    uint sent = 0;
    uint length = strlen(message) + 1;
    do {
        if (sent == 20)
            xevent.xclient.message_type = ATOM(_NET_STARTUP_INFO);

        for (uint i = 0; i < 20 && i + sent <= length; i++)
            xevent.xclient.data.b[i] = message[i + sent++];

        XSendEvent(X11->display, rootWindow, false, PropertyChangeMask, &xevent);
    } while (sent <= length);
}


void QWidgetPrivate::hide_sys()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    deactivateWidgetCleanup();
    if (q->isWindow()) {
        X11->deferred_map.removeAll(q);
        if (q->internalWinId()) // in nsplugin, may be 0
            XWithdrawWindow(X11->display, q->internalWinId(), xinfo.screen());

        if (QTLWExtra *x = maybeTopData()) {
            const QRect fs = x->frameStrut;
            data.crect.moveTopLeft(QPoint(data.crect.x() - fs.left(),
                                              data.crect.y() - fs.top()));
            // zero the frame strut and mark it dirty
            x->frameStrut.setCoords(0, 0, 0, 0);
            data.fstrut_dirty = true;
        }

        XFlush(X11->display);
    } else {
        invalidateBuffer(q->rect());
        q->setAttribute(Qt::WA_Mapped, false);
        if (q->internalWinId()) // in nsplugin, may be 0
            XUnmapWindow(X11->display, q->internalWinId());
    }
}

void QWidgetPrivate::raise_sys()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    XRaiseWindow(X11->display, q->internalWinId());
    if(!q->isWindow())
        invalidateBuffer(q->rect());
}

void QWidgetPrivate::lower_sys()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    XLowerWindow(X11->display, q->internalWinId());
    if(!q->isWindow())
        invalidateBuffer(q->rect());
}

void QWidgetPrivate::stackUnder_sys(QWidget* w)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    Window stack[2];
    stack[0] = w->internalWinId();;
    stack[1] = q->internalWinId();
    XRestackWindows(X11->display, stack, 2);
    if(!q->isWindow())
        invalidateBuffer(q->rect());
}


static void do_size_hints(QWidget* widget, QWExtra *x)
{
    Q_ASSERT(widget->testAttribute(Qt::WA_WState_Created));
    XSizeHints s;
    s.flags = 0;
    if (x) {
        QRect g = widget->geometry();
        s.x = g.x();
        s.y = g.y();
        s.width = g.width();
        s.height = g.height();
        if (x->minw > 0 || x->minh > 0) {
            // add minimum size hints
            s.flags |= PMinSize;
            s.min_width  = qMin(XCOORD_MAX, x->minw);
            s.min_height = qMin(XCOORD_MAX, x->minh);
        }
        if (x->maxw < QWIDGETSIZE_MAX || x->maxh < QWIDGETSIZE_MAX) {
            // add maximum size hints
            s.flags |= PMaxSize;
            s.max_width  = qMin(XCOORD_MAX, x->maxw);
            s.max_height = qMin(XCOORD_MAX, x->maxh);
        }
        if (x->topextra &&
            (x->topextra->incw > 0 || x->topextra->inch > 0)) {
            // add resize increment hints
            s.flags |= PResizeInc | PBaseSize;
            s.width_inc = x->topextra->incw;
            s.height_inc = x->topextra->inch;
            s.base_width = x->topextra->basew;
            s.base_height = x->topextra->baseh;
        }
    }
    if (widget->testAttribute(Qt::WA_Moved)) {
        // user (i.e. command-line) specified position
        s.flags |= USPosition;
        s.flags |= PPosition;
    }
    if (widget->testAttribute(Qt::WA_Resized)) {
        // user (i.e. command-line) specified size
        s.flags |= USSize;
        s.flags |= PSize;
    }
    s.flags |= PWinGravity;
    s.win_gravity = QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;
    XSetWMNormalHints(X11->display, widget->internalWinId(), &s);
}


/*
  Helper function for non-toplevel widgets. Helps to map Qt's 32bit
  coordinate system to X11's 16bit coordinate system.

  Sets the geometry of the widget to data.crect, but clipped to sizes
  that X can handle. Unmaps widgets that are completely outside the
  valid range.

  Maintains data.wrect, which is the geometry of the X widget,
  measured in this widget's coordinate system.

  if the parent is not clipped, parentWRect is empty, otherwise
  parentWRect is the geometry of the parent's X rect, measured in
  parent's coord sys
 */
void QWidgetPrivate::setWSGeometry(bool dontShow)
{
    Q_Q(QWidget);

    /*
      There are up to four different coordinate systems here:
      Qt coordinate system for this widget.
      X coordinate system for this widget (relative to wrect).
      Qt coordinate system for parent
      X coordinate system for parent (relative to parent's wrect).
     */
    Display *dpy = xinfo.display();
    QRect validRange(-XCOORD_MAX,-XCOORD_MAX, 2*XCOORD_MAX, 2*XCOORD_MAX);
    QRect wrectRange(-WRECT_MAX,-WRECT_MAX, 2*WRECT_MAX, 2*WRECT_MAX);
    QRect wrect;
    //xrect is the X geometry of my X widget. (starts out in  parent's Qt coord sys, and ends up in parent's X coord sys)
    QRect xrect = data.crect;

    QRect parentWRect = q->parentWidget()->data->wrect;

    if (parentWRect.isValid()) {
        // parent is clipped, and we have to clip to the same limit as parent
        if (!parentWRect.contains(xrect)) {
            xrect &= parentWRect;
            wrect = xrect;
            //translate from parent's to my Qt coord sys
            wrect.translate(-data.crect.topLeft());
        }
        //translate from parent's Qt coords to parent's X coords
        xrect.translate(-parentWRect.topLeft());

    } else {
        // parent is not clipped, we may or may not have to clip

        if (data.wrect.isValid() && QRect(QPoint(),data.crect.size()).contains(data.wrect)) {
            // This is where the main optimization is: we are already
            // clipped, and if our clip is still valid, we can just
            // move our window, and do not need to move or clip
            // children

            QRect vrect = xrect & q->parentWidget()->rect();
            vrect.translate(-data.crect.topLeft()); //the part of me that's visible through parent, in my Qt coords
            if (data.wrect.contains(vrect)) {
                xrect = data.wrect;
                xrect.translate(data.crect.topLeft());
                XMoveWindow(dpy, data.winid, xrect.x(), xrect.y());
                return;
            }
        }

        if (!validRange.contains(xrect)) {
            // we are too big, and must clip
            xrect &=wrectRange;
            wrect = xrect;
            wrect.translate(-data.crect.topLeft());
            //parent's X coord system is equal to parent's Qt coord
            //sys, so we don't need to map xrect.
        }

    }

    // unmap if we are outside the valid window system coord system
    bool outsideRange = !xrect.isValid();
    bool mapWindow = false;
    if (q->testAttribute(Qt::WA_OutsideWSRange) != outsideRange) {
        q->setAttribute(Qt::WA_OutsideWSRange, outsideRange);
        if (outsideRange) {
            XUnmapWindow(dpy, data.winid);
            q->setAttribute(Qt::WA_Mapped, false);
        } else if (!q->isHidden()) {
            mapWindow = true;
        }
    }

    if (outsideRange)
        return;

    bool jump = (data.wrect != wrect);
    data.wrect = wrect;


    // and now recursively for all children...
    // ### can be optimized
    for (int i = 0; i < children.size(); ++i) {
        QObject *object = children.at(i);
        if (object->isWidgetType()) {
            QWidget *w = static_cast<QWidget *>(object);
            if (!w->isWindow() && w->testAttribute(Qt::WA_WState_Created))
                w->d_func()->setWSGeometry(jump);
        }
    }

    // move ourselves to the new position and map (if necessary) after
    // the movement. Rationale: moving unmapped windows is much faster
    // than moving mapped windows
    if (jump) //avoid flicker when jumping
        XSetWindowBackgroundPixmap(dpy, data.winid, XNone);
    XMoveResizeWindow(dpy, data.winid, xrect.x(), xrect.y(), xrect.width(), xrect.height());

    //to avoid flicker, we have to show children after the helper widget has moved
    if (jump) {
        for (int i = 0; i < children.size(); ++i) {
            QObject *object = children.at(i);
            if (object->isWidgetType()) {
                QWidget *w = static_cast<QWidget *>(object);
                if (!w->testAttribute(Qt::WA_OutsideWSRange) && !w->testAttribute(Qt::WA_Mapped) && !w->isHidden()) {
                    w->setAttribute(Qt::WA_Mapped);
                    XMapWindow(dpy, w->data->winid);
                }
            }
        }
    }


    if  (jump)
        XClearArea(dpy, data.winid, 0, 0, wrect.width(), wrect.height(), True);

    if (mapWindow && !dontShow) {
            q->setAttribute(Qt::WA_Mapped);
            XMapWindow(dpy, data.winid);
    }
}

void QWidgetPrivate::setGeometry_sys(int x, int y, int w, int h, bool isMove)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    Display *dpy = X11->display;

    if ((q->windowType() == Qt::Desktop))
        return;
    if (q->isWindow()) {
        if (!qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_VERT))
            && !qt_net_supports(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ)))
            data.window_state &= ~Qt::WindowMaximized;
        if (!qt_net_supports(ATOM(_NET_WM_STATE_FULLSCREEN)))
            data.window_state &= ~Qt::WindowFullScreen;
        if (QTLWExtra *topData = maybeTopData())
            topData->normalGeometry = QRect(0,0,-1,-1);
        w = qMax(1, w);
        h = qMax(1, h);
    } else {
        uint s = data.window_state;
        s &= ~(Qt::WindowMaximized | Qt::WindowFullScreen);
        data.window_state = s;
    }
    if (extra) {                                // any size restrictions?
        w = qMin(w,extra->maxw);
        h = qMin(h,extra->maxh);
        w = qMax(w,extra->minw);
        h = qMax(h,extra->minh);
    }
    QPoint oldPos(q->pos());
    QSize oldSize(q->size());
    QRect oldGeom(data.crect);
    QRect  r(x, y, w, h);

    // We only care about stuff that changes the geometry, or may
    // cause the window manager to change its state
    if (!q->isWindow() && oldGeom == r)
        return;

    data.crect = r;
    bool isResize = q->size() != oldSize;

    if (q->isWindow()) {
        if (!q->isVisible())
            do_size_hints(q, extra);
        if (isMove) {
            if (! qt_broken_wm)
                // pos() is right according to ICCCM 4.1.5
                XMoveResizeWindow(dpy, data.winid, q->pos().x(), q->pos().y(), w, h);
            else
                // work around 4Dwm's incompliance with ICCCM 4.1.5
                XMoveResizeWindow(dpy, data.winid, x, y, w, h);
        } else if (isResize)
            XResizeWindow(dpy, data.winid, w, h);
        if (isResize) // set config pending only on resize, see qapplication_x11.cpp, translateConfigEvent()
            q->setAttribute(Qt::WA_WState_ConfigPending);

    } else {
        if(!isResize && q->isVisible()) {
            moveRect(QRect(oldPos, oldSize), x - oldPos.x(), y - oldPos.y());
        }
        if (q->testAttribute(Qt::WA_WState_Created))
            setWSGeometry();
        if (isResize && q->isVisible()) {
            invalidateBuffer(q->rect()); //after the resize
            QRegion oldRegion(QRect(oldPos, oldSize));
            if (!q->mask().isEmpty())
                oldRegion &= q->mask().translated(oldPos);
            q->parentWidget()->d_func()->invalidateBuffer(oldRegion);
        }
    }

    if (q->isVisible()) {
        if (isMove && q->pos() != oldPos) {
            if (! qt_broken_wm) {
                // pos() is right according to ICCCM 4.1.5
                QMoveEvent e(q->pos(), oldPos);
                QApplication::sendEvent(q, &e);
            } else {
                // work around 4Dwm's incompliance with ICCCM 4.1.5
                QMoveEvent e(data.crect.topLeft(), oldGeom.topLeft());
                QApplication::sendEvent(q, &e);
            }
        }
        if (isResize) {
            QResizeEvent e(q->size(), oldSize);
            QApplication::sendEvent(q, &e);
        }
    } else {
        if (isMove && q->pos() != oldPos)
            q->setAttribute(Qt::WA_PendingMoveEvent, true);
        if (isResize)
            q->setAttribute(Qt::WA_PendingResizeEvent, true);
    }
}

void QWidgetPrivate::setConstraints_sys()
{
    Q_Q(QWidget);
    if (q->testAttribute(Qt::WA_WState_Created))
        do_size_hints(q, extra);
}


void QWidget::scroll(int dx, int dy)
{
    Q_D(QWidget);
    if (!updatesEnabled() && children().size() == 0 || !isVisible())
        return;
    if (dx == 0 && dy == 0)
        return;
    d->scrollChildren(dx, dy);
    if (!QWidgetBackingStore::paintOnScreen(this)) {
        d->scrollRect(rect(), dx, dy);
    } else {
        scroll(dx, dy, QRect());
    }
}

void QWidget::scroll(int dx, int dy, const QRect& r)
{

    Q_D(QWidget);
    if (!updatesEnabled() && children().size() == 0 || !isVisible())
        return;
    if (dx == 0 && dy == 0)
        return;
    if (!QWidgetBackingStore::paintOnScreen(this)) {
        d->scrollRect(r, dx, dy);
        d->dirtyWidget_sys(r);
        return;
    }
    bool valid_rect = r.isValid();
    bool just_update = qAbs(dx) > width() || qAbs(dy) > height();
    QRect sr = valid_rect ? r : d->clipRect();
    if (just_update) {
        update();
    } else if (!valid_rect){
        d->dirtyOnScreen.translate(dx,dy);
    }

    int x1, y1, x2, y2, w = sr.width(), h = sr.height();
    if (dx > 0) {
        x1 = sr.x();
        x2 = x1+dx;
        w -= dx;
    } else {
        x2 = sr.x();
        x1 = x2-dx;
        w += dx;
    }
    if (dy > 0) {
        y1 = sr.y();
        y2 = y1+dy;
        h -= dy;
    } else {
        y2 = sr.y();
        y1 = y2-dy;
        h += dy;
    }

    if (dx == 0 && dy == 0)
        return;

    Display *dpy = X11->display;
    // Want expose events
    if (w > 0 && h > 0 && !just_update) {
        GC gc = XCreateGC(dpy, internalWinId(), 0, 0);
        XSetGraphicsExposures(dpy, gc, True);
        XCopyArea(dpy, internalWinId(), internalWinId(), gc, x1, y1, w, h, x2, y2);
        XFreeGC(dpy, gc);
    }

    if (!valid_rect && !d->children.isEmpty()) {        // scroll children
        QPoint pd(dx, dy);
        for (int i = 0; i < d->children.size(); ++i) { // move all children
            register QObject *object = d->children.at(i);
            if (object->isWidgetType()) {
                QWidget *w = static_cast<QWidget *>(object);
                if (!w->isWindow())
                    w->move(w->pos() + pd);
            }
        }
    }

    if (just_update)
        return;

    // Don't let the server be bogged-down with repaint events
    bool repaint_immediately = (qt_sip_count(this) < 3 && !testAttribute(Qt::WA_WState_InPaintEvent));

    if (dx) {
        int x = x2 == sr.x() ? sr.x()+w : sr.x();
        if (repaint_immediately)
            repaint(x, sr.y(), qAbs(dx), sr.height());
        else
            XClearArea(dpy, data->winid, x, sr.y(), qAbs(dx), sr.height(), True);
    }
    if (dy) {
        int y = y2 == sr.y() ? sr.y()+h : sr.y();
        if (repaint_immediately)
            repaint(sr.x(), y, sr.width(), qAbs(dy));
        else
            XClearArea(dpy, data->winid, sr.x(), y, sr.width(), qAbs(dy), True);
    }

    qt_insert_sip(this, dx, dy); // #### ignores r
}

int QWidget::metric(PaintDeviceMetric m) const
{
    Q_D(const QWidget);
    int val;
    if (m == PdmWidth) {
        val = data->crect.width();
    } else if (m == PdmHeight) {
        val = data->crect.height();
    } else {
        Display *dpy = X11->display;
        int scr = d->xinfo.screen();
        switch (m) {
            case PdmDpiX:
            case PdmPhysicalDpiX:
                val = QX11Info::appDpiX(scr);
                break;
            case PdmDpiY:
            case PdmPhysicalDpiY:
                val = QX11Info::appDpiY(scr);
                break;
            case PdmWidthMM:
                val = (DisplayWidthMM(dpy,scr)*data->crect.width())/
                      DisplayWidth(dpy,scr);
                break;
            case PdmHeightMM:
                val = (DisplayHeightMM(dpy,scr)*data->crect.height())/
                      DisplayHeight(dpy,scr);
                break;
            case PdmNumColors:
                val = d->xinfo.cells();
                break;
            case PdmDepth:
                val = d->xinfo.depth();
                break;
            default:
                val = 0;
                qWarning("QWidget::metric: Invalid metric command");
        }
    }
    return val;
}

void QWidgetPrivate::createSysExtra()
{
    extra->xDndProxy = 0;
    extra->compress_events = true;
}

void QWidgetPrivate::deleteSysExtra()
{
}

void QWidgetPrivate::createTLSysExtra()
{
    extra->topextra->iconMask = 0;
    extra->topextra->backingStore = 0;
    extra->topextra->validWMState = 0;
    extra->topextra->waitingForMapNotify = 0;
}

void QWidgetPrivate::deleteTLSysExtra()
{
    // don't destroy input context here. it will be destroyed in
    // QWidget::destroy() destroyInputContext();
    delete extra->topextra->iconMask;
    extra->topextra->iconMask = 0;
    delete extra->topextra->backingStore;
    extra->topextra->backingStore = 0;
}

void QWidgetPrivate::registerDropSite(bool on)
{
    Q_UNUSED(on);
}

void QWidget::setMask(const QRegion& region)
{
    Q_D(QWidget);
    d->createExtra();
    if (region == d->extra->mask)
        return;
#ifndef QT_NO_BACKINGSTORE
    QRegion parentR;
    if (!isWindow())
        parentR = d->extra->mask.isEmpty() ? QRegion(rect()) : d->extra->mask ;
#endif

    d->extra->mask = region;

    if (!testAttribute(Qt::WA_WState_Created))
        return;

    XShapeCombineRegion(X11->display, internalWinId(), ShapeBounding, 0, 0,
                        region.handle(), ShapeSet);
#ifndef QT_NO_BACKINGSTORE
    if (isVisible()) {
        if (!isWindow()) {
            parentR += d->extra->mask;
            parentWidget()->update(parentR.translated(geometry().topLeft()));
        }
        if (!testAttribute(Qt::WA_PaintOnScreen))
            update();
    }
#endif
}

void QWidget::setMask(const QBitmap &bitmap)
{
    Q_D(QWidget);
    d->createExtra();

#ifndef QT_NO_BACKINGSTORE
    QRegion parentR;
    if (!isWindow())
        parentR = d->extra->mask.isEmpty() ? QRegion(rect()) : d->extra->mask ;
#endif

    d->extra->mask = QRegion(bitmap);

    if (!testAttribute(Qt::WA_WState_Created))
        return;

    QBitmap bm = bitmap;
    if (bm.x11Info().screen() != d->xinfo.screen())
        bm.x11SetScreen(d->xinfo.screen());

    XShapeCombineMask(X11->display, internalWinId(), ShapeBounding, 0, 0,
                      bm.handle(), ShapeSet);

#ifndef QT_NO_BACKINGSTORE
    if (isVisible()) {
        if (!isWindow()) {
            parentR += d->extra->mask;
            parentWidget()->update(parentR.translated(geometry().topLeft()));
        }
        if (!testAttribute(Qt::WA_PaintOnScreen))
            update();
    }
#endif
}

void QWidget::clearMask()
{
    Q_D(QWidget);
    if (QWExtra *extra = d->extraData())
        extra->mask = QRegion();
    if (!testAttribute(Qt::WA_WState_Created))
        return;
    XShapeCombineMask(X11->display, internalWinId(), ShapeBounding, 0, 0,
                       XNone, ShapeSet);
}

void QWidgetPrivate::updateFrameStrut()
{
    Q_Q(QWidget);

    QTLWExtra *top = topData();
    if (!top->validWMState) {
        return;
    }

    Atom type_ret;
    Window l = q->internalWinId(), w = l, p, r; // target window, it's parent, root
    Window *c;
    int i_unused;
    unsigned int nc;
    unsigned char *data_ret;
    unsigned long l_unused;

    while (XQueryTree(X11->display, w, &r, &p, &c, &nc)) {
        if (c && nc > 0)
            XFree(c);

        if (! p) {
            qWarning("QWidget::updateFrameStrut: No parent");
            return;
        }

        // if the parent window is the root window, an Enlightenment virtual root or
        // a NET WM virtual root window, stop here
        data_ret = 0;
        if (p == r ||
            (XGetWindowProperty(X11->display, p,
                                ATOM(ENLIGHTENMENT_DESKTOP), 0, 1, False, XA_CARDINAL,
                                &type_ret, &i_unused, &l_unused, &l_unused,
                                &data_ret) == Success &&
             type_ret == XA_CARDINAL)) {
            if (data_ret)
                XFree(data_ret);

            break;
        } else if (qt_net_supports(ATOM(_NET_VIRTUAL_ROOTS)) && X11->net_virtual_root_list) {
            int i = 0;
            while (X11->net_virtual_root_list[i] != 0) {
                if (X11->net_virtual_root_list[i++] == p)
                    break;
            }
        }

        l = w;
        w = p;
    }

    // we have our window
    int transx, transy;
    XWindowAttributes wattr;
    if (XTranslateCoordinates(X11->display, l, w,
                              0, 0, &transx, &transy, &p) &&
        XGetWindowAttributes(X11->display, w, &wattr)) {
        top->frameStrut.setCoords(transx,
                                  transy,
                                  wattr.width - data.crect.width() - transx,
                                  wattr.height - data.crect.height() - transy);

        // add the border_width for the window managers frame... some window managers
        // do not use a border_width of zero for their frames, and if we the left and
        // top strut, we ensure that pos() is absolutely correct.  frameGeometry()
        // will still be incorrect though... perhaps i should have foffset as well, to
        // indicate the frame offset (equal to the border_width on X).
        // - Brad
        top->frameStrut.adjust(wattr.border_width,
                               wattr.border_width,
                               wattr.border_width,
                               wattr.border_width);
    }

   data.fstrut_dirty = false;
}

void QWidget::setWindowOpacity(qreal opacity)
{
    if (!isWindow())
        return;

    Q_D(QWidget);
    opacity = qBound(0.0, opacity, 1.0);
    d->topData()->opacity = uint(opacity * 255);
    if (!testAttribute(Qt::WA_WState_Created))
        return;
    ulong value = ulong(opacity * 0xffffffff);
    XChangeProperty(QX11Info::display(), internalWinId(), ATOM(_NET_WM_WINDOW_OPACITY), XA_CARDINAL,
                    32, PropModeReplace, (uchar*)&value, 1);
}

qreal QWidget::windowOpacity() const
{
    Q_D(const QWidget);
    return (isWindow() && d->maybeTopData()) ? d->maybeTopData()->opacity / 255. : 1.0;
}

const QX11Info &QWidget::x11Info() const
{
    Q_D(const QWidget);
    return d->xinfo;
}

void QWidgetPrivate::setWindowRole(const char *role)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    XChangeProperty(X11->display, q->internalWinId(),
                    ATOM(WM_WINDOW_ROLE), XA_STRING, 8, PropModeReplace,
                    (unsigned char *)role, qstrlen(role));
}

Q_GLOBAL_STATIC(QX11PaintEngine, qt_widget_paintengine)
QPaintEngine *QWidget::paintEngine() const
{
    Q_D(const QWidget);
    if (qt_widget_paintengine()->isActive()) {
        if (d->extraPaintEngine)
            return d->extraPaintEngine;
        QWidget *self = const_cast<QWidget *>(this);
        self->d_func()->extraPaintEngine = new QX11PaintEngine();
        return d->extraPaintEngine;
    }
    return qt_widget_paintengine();
}

Qt::HANDLE QWidget::x11PictureHandle() const
{
#ifndef QT_NO_XRENDER
    Q_D(const QWidget);
    return d->picture;
#else
    return 0;
#endif // QT_NO_XRENDER
}

#ifndef QT_NO_XRENDER
XRenderColor QX11Data::preMultiply(const QColor &c)
{
    XRenderColor color;
    const uint A = c.alpha(),
               R = c.red(),
               G = c.green(),
               B = c.blue();
    color.alpha = (A | A << 8);
    color.red   = (R | R << 8) * color.alpha / 0x10000;
    color.green = (G | G << 8) * color.alpha / 0x10000;
    color.blue  = (B | B << 8) * color.alpha / 0x10000;
    return color;
}
Picture QX11Data::getSolidFill(int screen, const QColor &c)
{
    if (!X11->use_xrender)
        return XNone;

    XRenderColor color = preMultiply(c);
    for (int i = 0; i < X11->solid_fill_count; ++i) {
        if (X11->solid_fills[i].screen == screen
            && X11->solid_fills[i].color.alpha == color.alpha
            && X11->solid_fills[i].color.red == color.red
            && X11->solid_fills[i].color.green == color.green
            && X11->solid_fills[i].color.blue == color.blue)
            return X11->solid_fills[i].picture;
    }
    // none found, replace one
    int i = rand() % 16;

    if (X11->solid_fills[i].screen != screen && X11->solid_fills[i].picture) {
        XRenderFreePicture (X11->display, X11->solid_fills[i].picture);
        X11->solid_fills[i].picture = 0;
    }

    if (!X11->solid_fills[i].picture) {
        Pixmap pixmap = XCreatePixmap (X11->display, RootWindow (X11->display, screen), 1, 1, 32);
        XRenderPictureAttributes attrs;
        attrs.repeat = True;
        X11->solid_fills[i].picture = XRenderCreatePicture (X11->display, pixmap,
                                                            XRenderFindStandardFormat(X11->display, PictStandardARGB32),
                                                            CPRepeat, &attrs);
        XFreePixmap (X11->display, pixmap);
    }

    X11->solid_fills[i].color = color;
    X11->solid_fills[i].screen = screen;
    XRenderFillRectangle (X11->display, PictOpSrc, X11->solid_fills[i].picture, &color, 0, 0, 1, 1);
    return X11->solid_fills[i].picture;
}
#endif

void QWidgetPrivate::setModal_sys()
{
}

---