qwidget_x11.cpp

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** Contact: http://www.qt-project.org/legal
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#include "qevent.h"
#include "qwidget.h"
#include "qdesktopwidget.h"
#include "qapplication.h"
#include "qapplication_p.h"
#include "qabstracteventdispatcher.h"
#include "qnamespace.h"
#include "qpainter.h"
#include "qbitmap.h"
#include "qlayout.h"
#include "qtextcodec.h"
#include "qelapsedtimer.h"
#include "qcursor.h"
#include "qstack.h"
#include "qcolormap.h"
#include "qdebug.h"
#include "qmenu.h"
#include "private/qmenu_p.h"
#include "private/qbackingstore_p.h"
#include "private/qwindowsurface_x11_p.h"

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

#include <private/qpixmap_x11_p.h>
#include <private/qpaintengine_x11_p.h>
#include "qt_x11_p.h"
#include "qx11info_x11.h"

#include <stdlib.h>

//#define ALIEN_DEBUG

// 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

QT_BEGIN_NAMESPACE

extern bool qt_nograb();

QWidget *QWidgetPrivate::mouseGrabber = 0;
QWidget *QWidgetPrivate::keyboardGrabber = 0;

void qt_net_remove_user_time(QWidget *tlw);
void qt_net_update_user_time(QWidget *tlw, unsigned long timestamp);

int qt_x11_create_desktop_on_screen = -1;

extern void qt_net_update_user_time(QWidget *tlw, unsigned long timestamp);

// 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->windowType() == Qt::Tool
             || w->windowType() == Qt::SplashScreen
             || w->windowType() == Qt::ToolTip
             || w->windowType() == Qt::Drawer
             || w->windowType() == Qt::Popup)
            && !w->testAttribute(Qt::WA_X11BypassTransientForHint));
}

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

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

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)
{
    if (!scrolled_widget->isWindow() && !scrolled_widget->internalWinId())
        return;
    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
}

void qt_x11_enforce_cursor(QWidget * w, bool force)
{
    if (!w->testAttribute(Qt::WA_WState_Created))
        return;

    static QPointer<QWidget> lastUnderMouse = 0;
    if (force) {
        lastUnderMouse = w;
    } else if (lastUnderMouse && lastUnderMouse->effectiveWinId() == w->effectiveWinId()) {
        w = lastUnderMouse;
    } else if (!w->internalWinId()) {
        return; //the mouse is not under this widget, and it's not native, so don't change it
    }

    while (!w->internalWinId() && w->parentWidget() && !w->isWindow() && !w->testAttribute(Qt::WA_SetCursor))
        w = w->parentWidget();

    QWidget *nativeParent = w;
    if (!w->internalWinId())
        nativeParent = w->nativeParentWidget();
    // This does the same as effectiveWinId(), but since it is possible
    // to not have a native parent widget due to a special hack in
    // qwidget for reparenting widgets to a different X11 screen,
    // added additional check to make sure native parent widget exists.
    if (!nativeParent || !nativeParent->internalWinId())
        return;
    WId winid = nativeParent->internalWinId();

    if (w->isWindow() || w->testAttribute(Qt::WA_SetCursor)) {
#ifndef QT_NO_CURSOR
        QCursor *oc = QApplication::overrideCursor();
        if (oc) {
            XDefineCursor(X11->display, winid, oc->handle());
        } else if (w->isEnabled()) {
            XDefineCursor(X11->display, winid, w->cursor().handle());
        } else {
            // enforce the windows behavior of clearing the cursor on
            // disabled widgets
            XDefineCursor(X11->display, winid, XNone);
        }
#endif
    } else {
        XDefineCursor(X11->display, winid, XNone);
    }
}

Q_GUI_EXPORT void qt_x11_enforce_cursor(QWidget * w)
{
    qt_x11_enforce_cursor(w, false);
}

void qt_x11_wait_for_window_manager(QWidget *w, bool sendPostedEvents)
{
    if (!w || (!w->isWindow() && !w->internalWinId()))
        return;
    QApplication::flush();
    XEvent ev;
    QElapsedTimer t;
    t.start();
    static const int maximumWaitTime = 2000;
    if (!w->testAttribute(Qt::WA_WState_Created))
        return;

    WId winid = w->internalWinId();

    // first deliver events that are already in the local queue
    if (sendPostedEvents)
        QApplication::sendPostedEvents();

    // the normal sequence is:
    //  ... ConfigureNotify ... ReparentNotify ... MapNotify ... Expose
    // with X11BypassWindowManagerHint:
    //  ConfigureNotify ... MapNotify ... Expose

    enum State {
        Initial, Mapped
    } state = Initial;

    do {
        if (XEventsQueued(X11->display, QueuedAlready)) {
            XNextEvent(X11->display, &ev);
            // Pass the event through the event dispatcher filter so that applications
            // which install an event filter on the dispatcher get to handle it first.
            if (!QAbstractEventDispatcher::instance()->filterEvent(&ev)) {
                qApp->x11ProcessEvent(&ev);

                switch (state) {
                case Initial:
                    if (ev.type == MapNotify && ev.xany.window == winid)
                        state = Mapped;
                    break;
                case Mapped:
                    if (ev.type == Expose && ev.xany.window == winid)
                        return;
                    break;
                }
            }
        } else {
            if (!XEventsQueued(X11->display, QueuedAfterFlush))
                qApp->syncX(); // non-busy wait
        }
        if (t.elapsed() > maximumWaitTime)
            return;
    } while(1);
}

Q_GUI_EXPORT void qt_x11_wait_for_window_manager(QWidget *w)
{
    qt_x11_wait_for_window_manager(w, true);
}

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);
}

struct QX11WindowAttributes {
    const XWindowAttributes *att;
};

void qt_x11_getX11InfoForWindow(QX11Info * xinfo, const XWindowAttributes &a)
{
    QX11WindowAttributes att;
    att.att = &a;
    qt_x11_getX11InfoForWindow(xinfo,att);
}


static QVector<Atom> getNetWmState(QWidget *w)
{
    QVector<Atom> returnValue;

    // Don't read anything, just get the size of the property data
    Atom actualType;
    int actualFormat;
    ulong propertyLength;
    ulong bytesLeft;
    uchar *propertyData = 0;
    if (XGetWindowProperty(X11->display, w->internalWinId(), ATOM(_NET_WM_STATE), 0, 0,
                           False, XA_ATOM, &actualType, &actualFormat,
                           &propertyLength, &bytesLeft, &propertyData) == Success
        && actualType == XA_ATOM && actualFormat == 32) {
        returnValue.resize(bytesLeft / 4);
        XFree((char*) propertyData);
        propertyData = 0;

        // fetch all data
        if (XGetWindowProperty(X11->display, w->internalWinId(), ATOM(_NET_WM_STATE), 0,
                               returnValue.size(), False, XA_ATOM, &actualType, &actualFormat,
                               &propertyLength, &bytesLeft, &propertyData) != Success) {
            returnValue.clear();
        } else if (propertyLength != (ulong)returnValue.size()) {
            returnValue.resize(propertyLength);
        }

        // put it into netWmState
        if (!returnValue.isEmpty()) {
            memcpy(returnValue.data(), propertyData, returnValue.size() * sizeof(Atom));
        }
        if (propertyData)
            XFree((char*) propertyData);
    }

    return returnValue;
}

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;
    if (type == Qt::Popup)
        flags |= Qt::X11BypassWindowManagerHint;

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

#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::create_sys START:" << q << "topLevel?" << topLevel << "WId:"
             << window << "initializeWindow:" << initializeWindow << "destroyOldWindow" << destroyOldWindow;
#endif
    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 (X11->isSupportedByWM(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 = 0;

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

    QX11Info *parentXinfo = parentWidget ? &parentWidget->d_func()->xinfo : 0;

    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 (parentXinfo && (parentXinfo->screen() != xinfo.screen()
                               || (parentXinfo->visual() != xinfo.visual()
                                   && !q->inherits("QGLWidget"))))
    {
        // QGLWidgets have to be excluded here as they have a
        // specially crafted QX11Info structure which can't be swapped
        // out with the parent widgets QX11Info. The parent visual,
        // for instance, might not even be GL capable.
        xinfo = *parentXinfo;
    }

    //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
        popup = false;                        // force these flags off
        data.crect.setRect(0, 0, sw, sh);
    } else if (topLevel && !q->testAttribute(Qt::WA_Resized)) {
        QDesktopWidget *desktopWidget = qApp->desktop();
        if (desktopWidget->isVirtualDesktop()) {
            QRect r = desktopWidget->screenGeometry();
            sw = r.width();
            sh = r.height();
        }

        int width = sw / 2;
        int height = 4 * sh / 10;
        if (extra) {
            width = qMax(qMin(width, extra->maxw), extra->minw);
            height = qMax(qMin(height, extra->maxh), extra->minh);
        }
        data.crect.setSize(QSize(width, height));
    }

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

    XSetWindowAttributes wsa;

    if (window) {                                // override the old window
        if (destroyOldWindow) {
            if (topLevel)
                X11->dndEnable(q, false);
            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);

        qt_x11_getX11InfoForWindow(&xinfo,a);

    } 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 if (topLevel || q->testAttribute(Qt::WA_NativeWindow) || paintOnScreen()) {
#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) {
            if (topLevel) {
                // top-levels must be at least 1x1
                safeRect.setSize(safeRect.size().expandedTo(QSize(1, 1)));
            } else {
                // create it way off screen, and rely on
                // setWSGeometry() to do the right thing with it later
                safeRect = QRect(-1000,-1000,1,1);
            }
        }
#ifndef QT_NO_XRENDER
        int screen = xinfo.screen();
        if (topLevel && X11->use_xrender
            && xinfo.depth() != 32 && X11->argbVisuals[screen]
            && q->testAttribute(Qt::WA_TranslucentBackground))
        {
            QX11InfoData *xd = xinfo.getX11Data(true);

            xd->screen = screen;
            xd->visual = X11->argbVisuals[screen];
            xd->colormap = X11->argbColormaps[screen];
            xd->depth = 32;
            xd->defaultVisual = false;
            xd->defaultColormap = false;
            xd->cells = xd->visual->map_entries;
            xinfo.setX11Data(xd);
        }
#endif
        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 && !desktop && q->internalWinId()) {
        XRenderPictFormat *format = XRenderFindVisualFormat(dpy, (Visual *) xinfo.visual());
        if (format)
            picture = XRenderCreatePicture(dpy, id, format, 0, 0);
    }
#endif // QT_NO_XRENDER

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

    if (topLevel) {
        ulong wsa_mask = 0;
        if (type != Qt::SplashScreen) { // && customize) {
            mwmhints.flags |= MWM_HINTS_DECORATIONS;

            bool customize = flags & Qt::CustomizeWindowHint;
            if (!(flags & Qt::FramelessWindowHint) && !(customize && !(flags & Qt::WindowTitleHint))) {
                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;
                    mwmhints.functions |= MWM_FUNC_MINIMIZE;
                }

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

                if (flags & Qt::WindowCloseButtonHint)
                     mwmhints.functions |= MWM_FUNC_CLOSE;
            }
        } else {
            // if type == Qt::SplashScreen
            mwmhints.decorations = MWM_DECOR_ALL;
        }

        if (tool) {
            wsa.save_under = True;
            wsa_mask |= CWSaveUnder;
        }

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

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

        if (mwmhints.functions != 0) {
            mwmhints.flags |= MWM_HINTS_FUNCTIONS;
            mwmhints.functions |= MWM_FUNC_MOVE | MWM_FUNC_RESIZE;
        } else {
            mwmhints.functions = MWM_FUNC_ALL;
        }

        if (!(flags & Qt::FramelessWindowHint)
            && flags & Qt::CustomizeWindowHint
            && flags & Qt::WindowTitleHint
            && !(flags &
                 (Qt::WindowMinimizeButtonHint
                  | Qt::WindowMaximizeButtonHint
                  | Qt::WindowCloseButtonHint))) {
            // a special case - only the titlebar without any button
            mwmhints.flags = MWM_HINTS_FUNCTIONS;
            mwmhints.functions = MWM_FUNC_MOVE | MWM_FUNC_RESIZE;
            mwmhints.decorations = 0;
        }
    }

    if (!initializeWindow) {
        // do no initialization
    } else if (popup) {                        // popup widget
        // set EWMH window types
        setNetWmWindowTypes();

        wsa.override_redirect = True;
        wsa.save_under = True;
        Q_ASSERT(id);
        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;
        memset(&size_hints, 0, sizeof(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
        memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
        wm_hints.flags = InputHint | StateHint | WindowGroupHint;
        wm_hints.input = q->testAttribute(Qt::WA_X11DoNotAcceptFocus) ? False : 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,
                         qApp->d_func()->argv, qApp->d_func()->argc,
                         &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[5];
        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
#ifndef QT_NO_XSYNC
        protocols[n++] = ATOM(_NET_WM_SYNC_REQUEST);        // support _NET_WM_SYNC_REQUEST protocol
#endif // QT_NO_XSYNC
        if (flags & Qt::WindowContextHelpButtonHint)
            protocols[n++] = ATOM(_NET_WM_CONTEXT_HELP);
        XSetWMProtocols(dpy, id, protocols, n);

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

        // set EWMH window types
        setNetWmWindowTypes();

        // 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 window role
        if (QTLWExtra *topData = maybeTopData()) {
            if (!topData->role.isEmpty()) {
                QByteArray windowRole = topData->role.toUtf8();
                XChangeProperty(dpy, id,
                                ATOM(WM_WINDOW_ROLE), XA_STRING, 8, PropModeReplace,
                                (unsigned char *)windowRole.constData(), windowRole.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 && q->internalWinId()) {
        // don't erase when resizing
        wsa.bit_gravity = QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;
        Q_ASSERT(id);
        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 if (q->internalWinId()) {
        XSelectInput(dpy, id, stdWidgetEventMask);
#if !defined (QT_NO_TABLET)
        QTabletDeviceDataList *tablet_list = qt_tablet_devices();
        if (X11->ptrXSelectExtensionEvent) {
            for (int i = 0; i < tablet_list->size(); ++i) {
                QTabletDeviceData tablet = tablet_list->at(i);
                X11->ptrXSelectExtensionEvent(dpy, id, reinterpret_cast<XEventClass*>(tablet.eventList),
                                              tablet.eventCount);
            }
        }
#endif
    }

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

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

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

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

        }
    } else if (q->internalWinId()) {
        qt_x11_enforce_cursor(q);
        if (QWidget *p = q->parentWidget()) // reset the cursor on the native parent
            qt_x11_enforce_cursor(p);
    }

    if (extra && !extra->mask.isEmpty() && q->internalWinId())
        XShapeCombineRegion(X11->display, q->internalWinId(), ShapeBounding, 0, 0,
                            extra->mask.handle(), ShapeSet);
#ifndef QT_NO_IM
    if (q->hasFocus() && q->testAttribute(Qt::WA_InputMethodEnabled)) {
        QInputContext *inputContext = q->inputContext();
        if (inputContext)
            inputContext->setFocusWidget(q);
    }
#endif
    if (destroyw) {
        qt_XDestroyWindow(q, dpy, destroyw);
        if (QTLWExtra *topData = maybeTopData()) {
#ifndef QT_NO_XSYNC
            if (topData->syncUpdateCounter)
                XSyncDestroyCounter(dpy, topData->syncUpdateCounter);
#endif
            // we destroyed our old window - reset the top-level state
            createTLSysExtra();
        }
    }

    // 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();
    else if (topLevel && (data.crect.width() == 0 || data.crect.height() == 0))
        q->setAttribute(Qt::WA_OutsideWSRange, true);

    if (!topLevel && q->testAttribute(Qt::WA_NativeWindow) && q->testAttribute(Qt::WA_Mapped)) {
        Q_ASSERT(q->internalWinId());
        XMapWindow(X11->display, q->internalWinId());
        // Ensure that mapped alien widgets are flushed immediately when re-created as native widgets.
        if (QWindowSurface *surface = q->windowSurface())
            surface->flush(q, q->rect(), q->mapTo(surface->window(), QPoint()));
    }

#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::create_sys END:" << q;
#endif
}

static void qt_x11_recreateWidget(QWidget *widget)
{
    if (widget->inherits("QGLWidget")) {
        // We send QGLWidgets a ParentChange event which causes them to
        // recreate their GL context, which in turn causes them to choose
        // their visual again. Now that WA_TranslucentBackground is set,
        // QGLContext::chooseVisual will select an ARGB visual.

        // QGLWidget expects a ParentAboutToChange to be sent first
        QEvent aboutToChangeEvent(QEvent::ParentAboutToChange);
        QApplication::sendEvent(widget, &aboutToChangeEvent);

        QEvent parentChangeEvent(QEvent::ParentChange);
        QApplication::sendEvent(widget, &parentChangeEvent);
    } else {
        // For regular widgets, reparent them with their parent which
        // also triggers a recreation of the native window
        QPoint pos = widget->pos();
        bool visible = widget->isVisible();
        if (visible)
            widget->hide();

        widget->setParent(widget->parentWidget(), widget->windowFlags());
        widget->move(pos);
        if (visible)
            widget->show();
    }
}

static void qt_x11_recreateNativeWidgetsRecursive(QWidget *widget)
{
    if (widget->internalWinId())
        qt_x11_recreateWidget(widget);

    const QObjectList &children = widget->children();
    for (int i = 0; i < children.size(); ++i) {
        QWidget *child = qobject_cast<QWidget*>(children.at(i));
        if (child)
            qt_x11_recreateNativeWidgetsRecursive(child);
    }
}

void QWidgetPrivate::x11UpdateIsOpaque()
{
#ifndef QT_NO_XRENDER
    Q_Q(QWidget);
    if (!q->testAttribute(Qt::WA_WState_Created) || !q->testAttribute(Qt::WA_TranslucentBackground))
        return;

    bool topLevel = (data.window_flags & Qt::Window);
    int screen = xinfo.screen();
    if (topLevel && X11->use_xrender
        && X11->argbVisuals[screen] && xinfo.depth() != 32)
    {
        qt_x11_recreateNativeWidgetsRecursive(q);
    }
#endif
}

/*
  Returns true if the background is inherited; otherwise returns
  false.

  Mainly used in the paintOnScreen case.
*/
bool QWidgetPrivate::isBackgroundInherited() const
{
    Q_Q(const QWidget);

    // windows do not inherit their background
    if (q->isWindow() || q->windowType() == Qt::SubWindow)
        return false;

    if (q->testAttribute(Qt::WA_NoSystemBackground) || q->testAttribute(Qt::WA_OpaquePaintEvent))
        return false;

    const QPalette &pal = q->palette();
    QPalette::ColorRole bg = q->backgroundRole();
    QBrush brush = pal.brush(bg);

    // non opaque brushes leaves us no choice, we must inherit
    if (!q->autoFillBackground() || !brush.isOpaque())
        return true;

    if (brush.style() == Qt::SolidPattern) {
        // the background is just a solid color. If there is no
        // propagated contents, then we claim as performance
        // optimization that it was not inheritet. This is the normal
        // case in standard Windows or Motif style.
        const QWidget *w = q->parentWidget();
        if (!w->d_func()->isBackgroundInherited())
            return false;
    }

    return true;
}

void QWidget::destroy(bool destroyWindow, bool destroySubWindows)
{
    Q_D(QWidget);
    d->aboutToDestroy();
    if (!isWindow() && parentWidget())
        parentWidget()->d_func()->invalidateBuffer(d->effectiveRectFor(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 (QWidgetPrivate::mouseGrabber == this)
            releaseMouse();
        if (QWidgetPrivate::keyboardGrabber == 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

        // delete the _NET_WM_USER_TIME_WINDOW
        qt_net_remove_user_time(this);

        if ((windowType() == Qt::Desktop)) {
            if (acceptDrops())
                X11->dndEnable(this, false);
        } else {
            if (isWindow())
                X11->dndEnable(this, false);
            if (destroyWindow)
                qt_XDestroyWindow(this, X11->display, data->winid);
        }
        QT_TRY {
            d->setWinId(0);
        } QT_CATCH (const std::bad_alloc &) {
            // swallow - destructors must not throw
        }

        extern void qPRCleanup(QWidget *widget); // from qapplication_x11.cpp
        if (testAttribute(Qt::WA_WState_Reparented))
            qPRCleanup(this);
#ifndef QT_NO_IM
        if(d->ic) {
            delete d->ic;
        } else {
            // release previous focus information participating with
            // preedit preservation of qic
            QInputContext *qic = QApplicationPrivate::inputContext;
            if (qic)
                qic->widgetDestroyed(this);
        }
#endif
    }
}

void QWidgetPrivate::setParent_sys(QWidget *parent, Qt::WindowFlags f)
{
    Q_Q(QWidget);
#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::setParent_sys START" << q << "parent:" << parent;
#endif
    QX11Info old_xinfo = xinfo;
    if (parent && parent->windowType() == Qt::Desktop) {
        // make sure the widget is created on the same screen as the
        // programmer specified desktop widget
        xinfo = parent->d_func()->xinfo;
        parent = 0;
    }

    QTLWExtra *topData = maybeTopData();
    bool wasCreated = q->testAttribute(Qt::WA_WState_Created);
    if (q->isVisible() && q->parentWidget() && parent != q->parentWidget())
        q->parentWidget()->d_func()->invalidateBuffer(effectiveRectFor(q->geometry()));
    extern void qPRCreate(const QWidget *, Window);
#ifndef QT_NO_CURSOR
    QCursor oldcurs;
#endif

    // 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);

    if (topData)
        qt_net_remove_user_time(q);

//     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 && old_winid) {
        XUnmapWindow(X11->display, old_winid);
        if (!old_xinfo.screen() != xinfo.screen())
            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 compatibility)
    if (wasCreated)
        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)
                    // ### setParent will add child back to the list
                    // ### of children so we need to make sure the
                    // ### widget won't be added twice.
                    w->d_func()->parent = 0;
                    this->children.removeOne(w);
                    w->setParent(q);
                } else if (!w->isWindow()) {
                    w->d_func()->invalidateBuffer(w->rect());
                    if (w->internalWinId()) {
                        if (w->testAttribute(Qt::WA_NativeWindow)) {
                            QWidget *nativeParentWidget = w->nativeParentWidget();
                            // Qt::WA_NativeWindow ensures that we always have a nativeParentWidget
                            Q_ASSERT(nativeParentWidget != 0);
                            QPoint p = w->mapTo(nativeParentWidget, QPoint());
                            XReparentWindow(X11->display,
                                            w->internalWinId(),
                                            nativeParentWidget->internalWinId(),
                                            p.x(), p.y());
                        } else {
                            w->d_func()->setParent_sys(q, w->data->window_flags);
                        }
                    }
                } 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()
                    */
                    if (w->internalWinId())
                        XUnmapWindow(X11->display, w->internalWinId());
                    QApplication::postEvent(w, new QEvent(QEvent::ShowWindowRequest));
                }
            }
        }
        qPRCreate(q, old_winid);
        updateSystemBackground();

        if (old_winid) {
            Window *cmwret;
            int count;
            if (XGetWMColormapWindows(X11->display, old_winid, &cmwret, &count)) {
                Window *cmw;
                int cmw_size = sizeof(Window)*count;
                cmw = new Window[count];
                memcpy((char *)cmw, (char *)cmwret, cmw_size);
                XFree((char *)cmwret);
                int i;
                for (i=0; i<count; i++) {
                    if (cmw[i] == old_winid) {
                        cmw[i] = q->internalWinId();
                        break;
                    }
                }
                int top_count;
                if (XGetWMColormapWindows(X11->display, q->window()->internalWinId(),
                                          &cmwret, &top_count))
                {
                    Window *merged_cmw = new Window[count + top_count];
                    memcpy((char *)merged_cmw, (char *)cmw, cmw_size);
                    memcpy((char *)merged_cmw + cmw_size, (char *)cmwret, sizeof(Window)*top_count);
                    delete [] cmw;
                    XFree((char *)cmwret);
                    cmw = merged_cmw;
                    count += top_count;
                }

                XSetWMColormapWindows(X11->display, q->window()->internalWinId(), cmw, count);
                delete [] cmw;
            }

            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());
#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::setParent_sys END" << q;
#endif
}

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

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

QPoint QWidget::mapToGlobal(const QPoint &pos) const
{
    Q_D(const QWidget);
    return d->mapToGlobal(pos);
}

QPoint QWidget::mapFromGlobal(const QPoint &pos) const
{
    Q_D(const QWidget);
    return d->mapFromGlobal(pos);
}

void QWidgetPrivate::updateSystemBackground()
{
    Q_Q(QWidget);
    if (!q->testAttribute(Qt::WA_WState_Created) || !q->internalWinId())
        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) {
            if (QX11Info::isCompositingManagerRunning()
                && q->testAttribute(Qt::WA_TranslucentBackground)
                && !(q->parent()))
                XSetWindowBackground(X11->display, q->internalWinId(),
                                     QColormap::instance(xinfo.screen()).pixel(Qt::transparent));
            else
                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) {
        extern QPixmap qt_toX11Pixmap(const QPixmap &pixmap); // qpixmap_x11.cpp
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(),
                                   static_cast<QX11PixmapData*>(qt_toX11Pixmap(brush.texture()).data.data())->x11ConvertToDefaultDepth());
    } else
        XSetWindowBackground(X11->display, q->internalWinId(),
                             QColormap::instance(xinfo.screen()).pixel(brush.color()));
}

#ifndef QT_NO_CURSOR
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);
}
#endif

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));
    if (!q->internalWinId())
        return;
    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;

    // preparing images to set the _NET_WM_ICON property
    QIcon icon = q->windowIcon();
    QVector<long> icon_data;
    Qt::HANDLE pixmap_handle = 0;
    if (!icon.isNull()) {
        QList<QSize> availableSizes = icon.availableSizes();
        if(availableSizes.isEmpty()) {
            // try to use default sizes since the icon can be a scalable image like svg.
            availableSizes.push_back(QSize(16,16));
            availableSizes.push_back(QSize(32,32));
            availableSizes.push_back(QSize(64,64));
            availableSizes.push_back(QSize(128,128));
        }
        for(int i = 0; i < availableSizes.size(); ++i) {
            QSize size = availableSizes.at(i);
            QPixmap pixmap = icon.pixmap(size);
            if (!pixmap.isNull()) {
                QImage image = pixmap.toImage().convertToFormat(QImage::Format_ARGB32);
                int pos = icon_data.size();
                icon_data.resize(pos + 2 + image.width()*image.height());
                icon_data[pos++] = image.width();
                icon_data[pos++] = image.height();
                if (sizeof(long) == sizeof(quint32)) {
                    memcpy(icon_data.data() + pos, image.scanLine(0), image.byteCount());
                } 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[pos + y*image.width() + x] = scanLine[x];
                    }
                }
            }
        }
        if (!icon_data.isEmpty()) {
            extern QPixmap qt_toX11Pixmap(const QPixmap &pixmap);
            /*
              if the app is running on an unknown desktop, or it 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 (X11->desktopEnvironment == DE_UNKNOWN
                || !QX11Info::appDefaultVisual(xinfo.screen())
                || !QX11Info::appDefaultColormap(xinfo.screen())) {
                // unknown DE or non-default visual/colormap, use 1bpp bitmap
                if (!forceReset || !topData->iconPixmap)
                    topData->iconPixmap = new QPixmap(qt_toX11Pixmap(QBitmap(icon.pixmap(QSize(64,64)))));
                pixmap_handle = topData->iconPixmap->handle();
            } else {
                // default depth, use a normal pixmap (even though this
                // violates the ICCCM), since this works on all DEs known to Qt
                if (!forceReset || !topData->iconPixmap)
                    topData->iconPixmap = new QPixmap(qt_toX11Pixmap(icon.pixmap(QSize(64,64))));
                pixmap_handle = static_cast<QX11PixmapData*>(topData->iconPixmap->data.data())->x11ConvertToDefaultDepth();
            }
        }
    }

    if (!q->internalWinId())
        return;

    if (!icon_data.isEmpty()) {
        XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_ICON), XA_CARDINAL, 32,
                        PropModeReplace, (unsigned char *) icon_data.data(),
                        icon_data.size());
    } else {
        XDeleteProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_ICON));
    }

    XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
    XWMHints wm_hints;
    if (!h) {
        memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
        h = &wm_hints;
    }

    if (pixmap_handle) {
        h->icon_pixmap = pixmap_handle;
        h->flags |= IconPixmapHint;
    } else {
        h->icon_pixmap = 0;
        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);
    if (!q->internalWinId())
        return;
    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 (QWidgetPrivate::mouseGrabber && QWidgetPrivate::mouseGrabber != this)
            QWidgetPrivate::mouseGrabber->releaseMouse();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
#ifndef QT_NO_DEBUG
        int status =
#endif
            XGrabPointer(X11->display, effectiveWinId(), 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
        QWidgetPrivate::mouseGrabber = this;
    }
}


#ifndef QT_NO_CURSOR
void QWidget::grabMouse(const QCursor &cursor)
{
    if (!qt_nograb()) {
        if (QWidgetPrivate::mouseGrabber && QWidgetPrivate::mouseGrabber != this)
            QWidgetPrivate::mouseGrabber->releaseMouse();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
#ifndef QT_NO_DEBUG
        int status =
#endif
        XGrabPointer(X11->display, effectiveWinId(), 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
        QWidgetPrivate::mouseGrabber = this;
    }
}
#endif


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


void QWidget::grabKeyboard()
{
    if (!qt_nograb()) {
        if (QWidgetPrivate::keyboardGrabber && QWidgetPrivate::keyboardGrabber != this)
            QWidgetPrivate::keyboardGrabber->releaseKeyboard();
        XGrabKeyboard(X11->display, effectiveWinId(), False, GrabModeAsync, GrabModeAsync,
                      X11->time);
        QWidgetPrivate::keyboardGrabber = this;
    }
}


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


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


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

void QWidget::activateWindow()
{
    QWidget *tlw = window();
    if (tlw->isVisible() && !tlw->d_func()->topData()->embedded && !X11->deferred_map.contains(tlw)) {
        if (X11->userTime == 0)
            X11->userTime = X11->time;
        qt_net_update_user_time(tlw, X11->userTime);

        if (X11->isSupportedByWM(ATOM(_NET_ACTIVE_WINDOW))
            && !(tlw->windowFlags() & Qt::X11BypassWindowManagerHint)) {
            XEvent e;
            e.xclient.type = ClientMessage;
            e.xclient.message_type = ATOM(_NET_ACTIVE_WINDOW);
            e.xclient.display = X11->display;
            e.xclient.window = tlw->internalWinId();
            e.xclient.format = 32;
            e.xclient.data.l[0] = 1;     // 1 == application
            e.xclient.data.l[1] = X11->userTime;
            if (QWidget *aw = QApplication::activeWindow())
                e.xclient.data.l[2] = aw->internalWinId();
            else
                e.xclient.data.l[2] = XNone;
            e.xclient.data.l[3] = 0;
            e.xclient.data.l[4] = 0;
            XSendEvent(X11->display, RootWindow(X11->display, tlw->x11Info().screen()),
                       false, SubstructureNotifyMask | SubstructureRedirectMask, &e);
        } else {
            if (!qt_widget_private(tlw)->topData()->waitingForMapNotify)
                XSetInputFocus(X11->display, tlw->internalWinId(), XRevertToParent, X11->time);
        }
    }
}

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 (X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                && X11->isSupportedByWM(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 (X11->isSupportedByWM(ATOM(_NET_WM_STATE_FULLSCREEN))) {
                if (newstate & Qt::WindowFullScreen) {
                    top->normalGeometry = geometry();
                    top->fullScreenOffset = d->frameStrut().topLeft();
                }
                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, effectiveWinId());
                }
            }

            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->testAttribute(Qt::WA_DontShowOnScreen)) {
        invalidateBuffer(q->rect());
        q->setAttribute(Qt::WA_Mapped);
        if (QTLWExtra *tlwExtra = maybeTopData())
            tlwExtra->waitingForMapNotify = 0;
        return;
    }

    if (q->isWindow()) {
        XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
        XWMHints  wm_hints;
        bool got_hints = h != 0;
        if (!got_hints) {
            memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
            h = &wm_hints;
        }
        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();

#ifndef QT_NO_MENU
            // hackish ... try to find the main window related to this QMenu
            if (qobject_cast<QMenu *>(q)) {
                p = static_cast<QMenuPrivate*>(this)->causedPopup.widget;
                if (!p)
                    p = q->parentWidget();
                if (!p)
                    p = QApplication::widgetAt(q->pos());
                if (!p)
                    p = qApp->activeWindow();
            }
#endif
            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;
            } else {
                mwmhints.functions &= ~MWM_FUNC_RESIZE;
            }

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

            if (q->windowFlags() & Qt::WindowMinimizeButtonHint) {
                mwmhints.flags |= MWM_HINTS_DECORATIONS;
                mwmhints.decorations |= MWM_DECOR_MINIMIZE;
                mwmhints.functions |= MWM_FUNC_MINIMIZE;
            }
            if (q->windowFlags() & Qt::WindowMaximizeButtonHint) {
                mwmhints.flags |= MWM_HINTS_DECORATIONS;
                mwmhints.decorations |= MWM_DECOR_MAXIMIZE;
                mwmhints.functions |= MWM_FUNC_MAXIMIZE;
            }
            if (q->windowFlags() & Qt::WindowCloseButtonHint)
                mwmhints.functions |= MWM_FUNC_CLOSE;
        }

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

        // update _NET_WM_STATE
        QVector<Atom> netWmState = getNetWmState(q);

        Qt::WindowFlags flags = q->windowFlags();
        if (flags & Qt::WindowStaysOnTopHint) {
            if (flags & Qt::WindowStaysOnBottomHint)
                qWarning() << "QWidget: Incompatible window flags: the window can't be on top and on bottom at the same time";
            if (!netWmState.contains(ATOM(_NET_WM_STATE_ABOVE)))
                netWmState.append(ATOM(_NET_WM_STATE_ABOVE));
            if (!netWmState.contains(ATOM(_NET_WM_STATE_STAYS_ON_TOP)))
                netWmState.append(ATOM(_NET_WM_STATE_STAYS_ON_TOP));
        } else if (flags & Qt::WindowStaysOnBottomHint) {
            if (!netWmState.contains(ATOM(_NET_WM_STATE_BELOW)))
                netWmState.append(ATOM(_NET_WM_STATE_BELOW));
        }
        if (q->isFullScreen()) {
            if (!netWmState.contains(ATOM(_NET_WM_STATE_FULLSCREEN)))
                netWmState.append(ATOM(_NET_WM_STATE_FULLSCREEN));
        }
        if (q->isMaximized()) {
            if (!netWmState.contains(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ)))
                netWmState.append(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ));
            if (!netWmState.contains(ATOM(_NET_WM_STATE_MAXIMIZED_VERT)))
                netWmState.append(ATOM(_NET_WM_STATE_MAXIMIZED_VERT));
        }
        if (data.window_modality != Qt::NonModal) {
            if (!netWmState.contains(ATOM(_NET_WM_STATE_MODAL)))
                netWmState.append(ATOM(_NET_WM_STATE_MODAL));
        }

        if (!netWmState.isEmpty()) {
            XChangeProperty(X11->display, q->internalWinId(),
                            ATOM(_NET_WM_STATE), XA_ATOM, 32, PropModeReplace,
                            (unsigned char *) netWmState.data(), netWmState.size());
        } else {
            XDeleteProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_STATE));
        }

        // set _NET_WM_USER_TIME
        Time userTime = X11->userTime;
        bool setUserTime = false;
        if (q->testAttribute(Qt::WA_ShowWithoutActivating)) {
            userTime = 0;
            setUserTime = true;
        } else if (userTime != CurrentTime) {
            setUserTime = true;
        }
        if (setUserTime)
            qt_net_update_user_time(q, userTime);

#ifndef QT_NO_XSYNC
        if (!topData()->syncUpdateCounter) {
            XSyncValue value;
            XSyncIntToValue(&value, 0);
            topData()->syncUpdateCounter = XSyncCreateCounter(X11->display, value);

            XChangeProperty(X11->display, q->internalWinId(),
                            ATOM(_NET_WM_SYNC_REQUEST_COUNTER),
                            XA_CARDINAL,
                            32, PropModeReplace,
                            (uchar *) &topData()->syncUpdateCounter, 1);

            topData()->newCounterValueHi = 0;
            topData()->newCounterValueLo = 0;
        }
#endif

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

        if (q->isMaximized() && !q->isFullScreen()
            && !(X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                 && X11->isSupportedByWM(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() && !X11->isSupportedByWM(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)) {
        if (q->internalWinId()) {
            XSetWindowBackgroundPixmap(X11->display, q->internalWinId(), XNone);
            XMapWindow(X11->display, q->internalWinId());
            updateSystemBackground();
        }
        return;
    }

    if (q->internalWinId())
        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::setNetWmWindowTypes()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));

    if (!q->isWindow()) {
        if (q->internalWinId())
            XDeleteProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_WINDOW_TYPE));
        return;
    }

    QVector<long> windowTypes;

    // manual selection 1 (these are never set by Qt and take precedence)
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeDesktop))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DESKTOP));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeDock))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DOCK));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeNotification))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_NOTIFICATION));

    // manual selection 2 (Qt uses these during auto selection);
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeUtility))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_UTILITY));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeSplash))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_SPLASH));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeDialog))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DIALOG));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeToolTip))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_TOOLTIP));

    // manual selection 3 (these can be set by Qt, but don't have a
    // corresponding Qt::WindowType). note that order of the *MENU
    // atoms is important
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeMenu))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_MENU));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeDropDownMenu))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DROPDOWN_MENU));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypePopupMenu))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_POPUP_MENU));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeToolBar))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeCombo))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_COMBO));
    if (q->testAttribute(Qt::WA_X11NetWmWindowTypeDND))
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DND));

    // automatic selection
    switch (q->windowType()) {
    case Qt::Dialog:
    case Qt::Sheet:
        // dialog netwm type
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_DIALOG));
        break;

    case Qt::Tool:
    case Qt::Drawer:
        // utility netwm type
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_UTILITY));
        break;

    case Qt::ToolTip:
        // tooltip netwm type
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_TOOLTIP));
        break;

    case Qt::SplashScreen:
        // splash netwm type
        windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_SPLASH));
        break;

    default:
        break;
    }

    if (q->windowFlags() & Qt::FramelessWindowHint) {
        // override netwm type - quick and easy for KDE noborder
        windowTypes.append(ATOM(_KDE_NET_WM_WINDOW_TYPE_OVERRIDE));
    }

    // normal netwm type - default
    windowTypes.append(ATOM(_NET_WM_WINDOW_TYPE_NORMAL));

    if (!windowTypes.isEmpty()) {
        XChangeProperty(X11->display, q->winId(), ATOM(_NET_WM_WINDOW_TYPE), XA_ATOM, 32,
                        PropModeReplace, (unsigned char *) windowTypes.constData(),
                        windowTypes.count());
    } else {
        XDeleteProperty(X11->display, q->winId(), ATOM(_NET_WM_WINDOW_TYPE));
    }
}

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

void QWidgetPrivate::setFocus_sys()
{

}


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

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


static void do_size_hints(QWidget* widget, QWExtra *x)
{
    Q_ASSERT(widget->testAttribute(Qt::WA_WState_Created));
    XSizeHints s;
    memset(&s, 0, sizeof(s));
    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;
    if (widget->testAttribute(Qt::WA_Moved) && x && x->topextra && !x->topextra->posFromMove) {
        // position came from setGeometry(), tell the WM that we don't
        // want our window gravity-shifted
        s.win_gravity = StaticGravity;
    } else {
        // position came from move()
        s.x = widget->x();
        s.y = widget->y();
        s.win_gravity = QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;
    }
    if (widget->internalWinId())
        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, const QRect &)
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));

    /*
      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;

    const QWidget *const parent = q->parentWidget();
    QRect parentWRect = parent->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 & parent->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());
                if (data.winid)
                    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) {
            if (data.winid)
                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);
        }
    }

    if (data.winid) {
        // 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);
        if (!parent->internalWinId())
            xrect.translate(parent->mapTo(q->nativeParentWidget(), QPoint(0, 0)));
        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);
                    if (w->internalWinId())
                        XMapWindow(dpy, w->data->winid);
                }
            }
        }
    }


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

    if (mapWindow && !dontShow) {
        q->setAttribute(Qt::WA_Mapped);
        if (data.winid)
            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 (!X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_VERT))
            && !X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ)))
            data.window_state &= ~Qt::WindowMaximized;
        if (!X11->isSupportedByWM(ATOM(_NET_WM_STATE_FULLSCREEN)))
            data.window_state &= ~Qt::WindowFullScreen;
        if (QTLWExtra *topData = maybeTopData())
            topData->normalGeometry = QRect(0,0,-1,-1);
    } 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 (w == 0 || h == 0) {
            q->setAttribute(Qt::WA_OutsideWSRange, true);
            if (q->isVisible() && q->testAttribute(Qt::WA_Mapped))
                hide_sys();
        } else if (q->isVisible() && q->testAttribute(Qt::WA_OutsideWSRange)) {
            q->setAttribute(Qt::WA_OutsideWSRange, false);

            // put the window in its place and show it
            if (data.winid)
                XMoveResizeWindow(dpy, data.winid, x, y, w, h);
            topData()->posFromMove = false; // force StaticGravity
            do_size_hints(q, extra);
            show_sys();
        } else {
            q->setAttribute(Qt::WA_OutsideWSRange, false);
            if (!q->isVisible())
                do_size_hints(q, extra);
            if (isMove) {
                if ((data.window_flags & Qt::X11BypassWindowManagerHint) == Qt::X11BypassWindowManagerHint
                    // work around 4Dwm's incompliance with ICCCM 4.1.5
                    || X11->desktopEnvironment == DE_4DWM) {
                    if (data.winid)
                        XMoveResizeWindow(dpy, data.winid, x, y, w, h);
                } else if (q->isVisible()
                           && topData()->validWMState
                           && X11->isSupportedByWM(ATOM(_NET_MOVERESIZE_WINDOW))) {
                    XEvent e;
                    e.xclient.type = ClientMessage;
                    e.xclient.message_type = ATOM(_NET_MOVERESIZE_WINDOW);
                    e.xclient.display = X11->display;
                    e.xclient.window = q->internalWinId();
                    e.xclient.format = 32;
                    e.xclient.data.l[0] = StaticGravity | 1<<8 | 1<<9 | 1<<10 | 1<<11 | 1<<12;
                    e.xclient.data.l[1] = x;
                    e.xclient.data.l[2] = y;
                    e.xclient.data.l[3] = w;
                    e.xclient.data.l[4] = h;
                    XSendEvent(X11->display, RootWindow(X11->display, q->x11Info().screen()),
                               false, (SubstructureNotifyMask | SubstructureRedirectMask), &e);
                } else if (data.winid) {
                    // pos() is right according to ICCCM 4.1.5
                    XMoveResizeWindow(dpy, data.winid, q->pos().x(), q->pos().y(), w, h);
                }
            } else if (isResize && data.winid) {
                if (!q->isVisible()
                    && topData()->validWMState
                    && !q->testAttribute(Qt::WA_PendingMoveEvent)) {
                    /*
                       even though we've not visible, we could be in a
                       race w/ the window manager, and it may ignore
                       our ConfigureRequest. setting posFromMove to
                       false makes sure that doDeferredMap() in
                       qapplication_x11.cpp keeps the window in the
                       right place
                    */
                    topData()->posFromMove = false;
                }
                XResizeWindow(dpy, data.winid, w, h);
            }
        }
        if (isResize && !q->testAttribute(Qt::WA_DontShowOnScreen)) // set config pending only on resize, see qapplication_x11.cpp, translateConfigEvent()
            q->setAttribute(Qt::WA_WState_ConfigPending);

    } else {
        QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData();
        const bool inTopLevelResize = tlwExtra ? tlwExtra->inTopLevelResize : false;
        const bool disableInTopLevelResize = inTopLevelResize && q->internalWinId();
        if (disableInTopLevelResize) {
            // Top-level resize optimization does not work for native child widgets;
            // disable it for this particular widget.
            tlwExtra->inTopLevelResize = false;
        }

        if (!isResize && (!inTopLevelResize || disableInTopLevelResize) && q->isVisible()) {
            moveRect(QRect(oldPos, oldSize), x - oldPos.x(), y - oldPos.y());
        }
        if (q->testAttribute(Qt::WA_WState_Created))
            setWSGeometry();

        if (isResize && (!inTopLevelResize || disableInTopLevelResize) && q->isVisible())
            invalidateBuffer_resizeHelper(oldPos, oldSize);

        if (disableInTopLevelResize)
            tlwExtra->inTopLevelResize = true;
    }

    if (q->isVisible()) {
        if (isMove && q->pos() != oldPos) {
            if (X11->desktopEnvironment != DE_4DWM) {
                // 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) {
            static bool slowResize = qgetenv("QT_SLOW_TOPLEVEL_RESIZE").toInt();
            // If we have a backing store with static contents, we have to disable the top-level
            // resize optimization in order to get invalidated regions for resized widgets.
            // The optimization discards all invalidateBuffer() calls since we're going to
            // repaint everything anyways, but that's not the case with static contents.
            const bool setTopLevelResize = !slowResize && q->isWindow() && extra && extra->topextra
                                           && !extra->topextra->inTopLevelResize
                                           && (!extra->topextra->backingStore
                                               || !extra->topextra->backingStore->hasStaticContents());
            if (setTopLevelResize)
                extra->topextra->inTopLevelResize = true;
            QResizeEvent e(q->size(), oldSize);
            QApplication::sendEvent(q, &e);
            if (setTopLevelResize)
                extra->topextra->inTopLevelResize = false;
        }
    } 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);
#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::setConstraints_sys START" << q;
#endif
    if (q->testAttribute(Qt::WA_WState_Created)) {
        do_size_hints(q, extra);
        QtMWMHints mwmHints = GetMWMHints(X11->display, q->internalWinId());
        const bool wasFuncResize = mwmHints.functions & MWM_FUNC_RESIZE;
        if (q->minimumSize() == q->maximumSize())
            mwmHints.functions &= ~MWM_FUNC_RESIZE;
        else
            mwmHints.functions |= MWM_FUNC_RESIZE;
        if (wasFuncResize != (mwmHints.functions & MWM_FUNC_RESIZE))
            SetMWMHints(X11->display, q->internalWinId(), mwmHints);
    }
#ifdef ALIEN_DEBUG
    qDebug() << "QWidgetPrivate::setConstraints_sys END" << q;
#endif
}

void QWidgetPrivate::scroll_sys(int dx, int dy)
{
    Q_Q(QWidget);

    scrollChildren(dx, dy);
    if (!paintOnScreen()) {
        scrollRect(q->rect(), dx, dy);
    } else {
        scroll_sys(dx, dy, QRect());
    }
}

void QWidgetPrivate::scroll_sys(int dx, int dy, const QRect &r)
{
    Q_Q(QWidget);

    if (!paintOnScreen()) {
        scrollRect(r, dx, dy);
        return;
    }
    bool valid_rect = r.isValid();
    bool just_update = qAbs(dx) > q->width() || qAbs(dy) > q->height();
    QRect sr = valid_rect ? r : clipRect();
    if (just_update)
        q->update();
    else if (!valid_rect)
        dirty.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 && q->internalWinId()) {
        GC gc = XCreateGC(dpy, q->internalWinId(), 0, 0);
        XSetGraphicsExposures(dpy, gc, True);
        XCopyArea(dpy, q->internalWinId(), q->internalWinId(), gc, x1, y1, w, h, x2, y2);
        XFreeGC(dpy, gc);
    }

    if (!valid_rect && !children.isEmpty()) {        // scroll children
        QPoint pd(dx, dy);
        for (int i = 0; i < children.size(); ++i) { // move all children
            register QObject *object = 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(q) < 3 && !q->testAttribute(Qt::WA_WState_InPaintEvent));

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

    qt_insert_sip(q, 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:
                if (d->extra && d->extra->customDpiX)
                    val = d->extra->customDpiX;
                else if (d->parent)
                    val = static_cast<QWidget *>(d->parent)->metric(m);
                else
                    val = QX11Info::appDpiX(scr);
                break;
            case PdmDpiY:
            case PdmPhysicalDpiY:
                if (d->extra && d->extra->customDpiY)
                    val = d->extra->customDpiY;
                else if (d->parent)
                    val = static_cast<QWidget *>(d->parent)->metric(m);
                else
                    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->compress_events = true;
    extra->xDndProxy = 0;
}

void QWidgetPrivate::deleteSysExtra()
{
}

void QWidgetPrivate::createTLSysExtra()
{
    extra->topextra->spont_unmapped = 0;
    extra->topextra->dnd = 0;
    extra->topextra->validWMState = 0;
    extra->topextra->waitingForMapNotify = 0;
    extra->topextra->parentWinId = 0;
    extra->topextra->userTimeWindow = 0;
#ifndef QT_NO_XSYNC
    extra->topextra->syncUpdateCounter = 0;
    extra->topextra->syncRequestTimestamp = 0;
    extra->topextra->newCounterValueHi = 0;
    extra->topextra->newCounterValueLo = 0;
#endif
}

void QWidgetPrivate::deleteTLSysExtra()
{
    // don't destroy input context here. it will be destroyed in
    // QWidget::destroy() destroyInputContext();
#ifndef QT_NO_XSYNC
    if (extra && extra->topextra && extra->topextra->syncUpdateCounter) {
        XSyncDestroyCounter(X11->display, extra->topextra->syncUpdateCounter);
        extra->topextra->syncUpdateCounter = 0;
    }
#endif
}

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

void QWidgetPrivate::setMask_sys(const QRegion &region)
{
    Q_Q(QWidget);
    if (!q->internalWinId())
        return;

    if (region.isEmpty()) {
        XShapeCombineMask(X11->display, q->internalWinId(), ShapeBounding, 0, 0,
                          XNone, ShapeSet);
    } else {
        XShapeCombineRegion(X11->display, q->internalWinId(), ShapeBounding, 0, 0,
                            region.handle(), ShapeSet);
    }
}

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

    QTLWExtra *top = topData();
    if (!top->validWMState) {
        return;
    }
    if (!q->isWindow() && !q->internalWinId()) {
        data.fstrut_dirty = false;
        return;
    }

    Atom type_ret;
    Window l = q->effectiveWinId(), w = l, p, r; // target window, its 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 (X11->isSupportedByWM(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 QWidgetPrivate::setWindowOpacity_sys(qreal opacity)
{
    Q_Q(QWidget);
    ulong value = ulong(opacity * 0xffffffff);
    XChangeProperty(QX11Info::display(), q->internalWinId(), ATOM(_NET_WM_WINDOW_OPACITY), XA_CARDINAL,
                    32, PropModeReplace, (uchar*)&value, 1);
}

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

void QWidgetPrivate::setWindowRole()
{
    Q_Q(QWidget);
    if (!q->internalWinId())
        return;
    QByteArray windowRole = topData()->role.toUtf8();
    XChangeProperty(X11->display, q->internalWinId(),
                    ATOM(WM_WINDOW_ROLE), XA_STRING, 8, PropModeReplace,
                    (unsigned char *)windowRole.constData(), windowRole.length());
}

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();
}

QWindowSurface *QWidgetPrivate::createDefaultWindowSurface_sys()
{
    return new QX11WindowSurface(q_func());
}

Qt::HANDLE QWidget::x11PictureHandle() const
{
#ifndef QT_NO_XRENDER
    Q_D(const QWidget);
    if (!internalWinId() && testAttribute(Qt::WA_WState_Created))
        (void)winId(); // enforce native window
    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 = qrand() % 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()
{
}

void qt_x11_getX11InfoForWindow(QX11Info * xinfo, const QX11WindowAttributes &att)
{
    QX11InfoData* xd = xinfo->getX11Data(true);
    const XWindowAttributes &a = *(att.att);
    // find which screen the window is on...
    xd->screen = QX11Info::appScreen(); // by default, use the default :)
    int i;
    for (i = 0; i < ScreenCount(X11->display); i++) {
        if (RootWindow(X11->display, i) == a.root) {
            xd->screen = i;
            break;
        }
    }

    xd->depth = a.depth;
    xd->cells = DisplayCells(X11->display, 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);
}

void QWidgetPrivate::updateX11AcceptFocus()
{
    Q_Q(QWidget);
    if (!q->isWindow() || !q->internalWinId())
        return;

    XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
    XWMHints wm_hints;
    if (!h) {
        memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
        h = &wm_hints;
    }
    h->flags |= InputHint;
    h->input = q->testAttribute(Qt::WA_X11DoNotAcceptFocus) ? False : True;

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

QT_END_NAMESPACE