/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include <qdebug.h>

#include "hbmainwindow.h"

#include "hbwindowobscured_p.h"

#include "hbinstance.h"

#include "hbevent.h"

#if defined(Q_WS_X11)

#include <X11/Xlib.h>

#include <qx11info_x11.h>

#endif // defined(Q_WS_X11)

#if defined(Q_OS_SYMBIAN)

#include <qsymbianevent.h>

#include <coecntrl.h>

#endif

bool HbWindowObscured::filterInstalled = false;

QCoreApplication::EventFilter HbWindowObscured::prevEventFilter = 0;

void HbWindowObscured::installWindowEventFilter()

{

    //Install only one eventfilter, HbMainWindow can be created multiple times.

    if (!filterInstalled) {

        prevEventFilter = qApp->setEventFilter(eventFilter);

        filterInstalled = true;

    }

}

#if defined(Q_WS_X11) //eventfilter implementation for xlib

bool HbWindowObscured::eventFilter(void *message, long *result)

{

    XEvent *xEvent = (XEvent *)message;

    if (xEvent->type == VisibilityNotify) {

        XVisibilityEvent *event = (XVisibilityEvent *)xEvent;

        QList<HbMainWindow *> mainWindows = hbInstance->allMainWindows();

        int mainWindowCount = mainWindows.size();

        for (int index = 0; index < mainWindowCount; ++index) {

            HbMainWindow *window = mainWindows[index];

            if (window != 0 && window->effectiveWinId() == event->window) {

                bool obscuredState = (event->state == VisibilityFullyObscured);

                HbWindowObscuredChangedEvent obscureChangedEvent(obscuredState);

                QCoreApplication::sendEvent(window, &obscureChangedEvent);

                break;

            }

        }

    }

    //Call the previous event filter if there is one, else return false with no filtering.

    return prevEventFilter ? prevEventFilter(message, result) : false;

}

bool HbWindowObscured::eventFilter(void *message, long *result)

{

    QSymbianEvent *symEvent = static_cast<QSymbianEvent *>(message);

    if (symEvent->type() == QSymbianEvent::WindowServerEvent) {

        const TWsEvent *wsEvent = symEvent->windowServerEvent();

        switch (wsEvent->Type()) {

        case EEventWindowVisibilityChanged: {

            // we need to generate an HbWindowObscuredChanged event.

            CCoeControl *control = reinterpret_cast<CCoeControl *>(wsEvent->Handle());

            RDrawableWindow *rWindow = control->DrawableWindow();

            QList<HbMainWindow *> mainWindows = hbInstance->allMainWindows();

            int mainWindowCount = mainWindows.size();

            for (int index = 0; index < mainWindowCount; ++index) {

                HbMainWindow *window = mainWindows[index];

                if (window != 0

                        && window->effectiveWinId()->DrawableWindow() == rWindow) {

                    const TWsVisibilityChangedEvent *visChangedEvent = wsEvent->VisibilityChanged();

                    bool obscuredState =

                        (visChangedEvent->iFlags & TWsVisibilityChangedEvent::ENotVisible) ?

                        true : false;

                    HbWindowObscuredChangedEvent obscureChangedEvent(obscuredState);

                    QCoreApplication::sendEvent(window, &obscureChangedEvent);

                    break;

                }

            }

        }

        }

    }

    //Call the previous event filter if there is one, else return false with no filtering.

    return prevEventFilter ? prevEventFilter(message, result) : false;

}

//Generic evenfilter for non-supported platform i.e windows. Do nothing.

bool HbWindowObscured::eventFilter(void *, long *)

{

    return false;

}

#endif