/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

* 

* Description:  Root Screensaver state.

*

*/

#include "snsrrootstate.h"

#include <QDebug>

#include <QEventTransition>

#include <hbinstance.h>

#include <hbmainwindow.h>

#include <hbview.h>

#include <screensaverfactory.h>

#include "snsrtest_global.h"

#include "snsruseractivityservice.h"

/*!

    \class SnsrRootState

    \ingroup group_snsrdefaultstateprovider

    \brief Root Screensaver state.

 */

/*!

    Constructs a new SnsrRootState with parent.

*/

SnsrRootState::SnsrRootState(QState *parent) : 

    QState(parent), mScreensaver(0), mCurrentView(0), mMainWindow(0)

{

    SCREENSAVER_TEST_FUNC_ENTRY("SnsrRootState::SnsrRootState")

    mMainWindow = HbInstance::instance()->allMainWindows().at(0);

    // TODO: consider if this should be Screensaver's responsibility

    mMainWindow->hideItems(Hb::AllItems);

    // load screensaver plugin

    mUserActivity = new SnsrUserActivityService();

    mUserActivity->setInactivityPeriod(5); // 5 seconds inactivity period

    ScreensaverFactory factory(QString("snsrresources/plugins/screensaverproviders"));

    ScreensaverToken bigClockToken;

    bigClockToken.mLibrary = QString("snsrbigclockscreensaverprovider.dll");

    bigClockToken.mUri = QString("screensaver.nokia.com/screensaver/bigclock");

    mScreensaver = factory.createScreensaver(bigClockToken);

    if (mScreensaver) {

        mScreensaver->setParent(this);

    } else {

        // TODO: error state

    }

    connect(mScreensaver, SIGNAL(viewChanged(QGraphicsWidget*)), SLOT(changeView(QGraphicsWidget*)));

    connect(mScreensaver, SIGNAL(faulted()), SLOT(screensaverFaulted()));

    // foreground state

    QState *foregroundState = new QState(this);

    connect(foregroundState, SIGNAL(entered()), mScreensaver, SLOT(foreground()));

    // background state

    QState *backgroundState = new QState(this);

    connect(backgroundState, SIGNAL(entered()), mScreensaver, SLOT(background()));

    // partial foreground state

    QState *partialForegroundState = new QState(this);

    connect(partialForegroundState, SIGNAL(entered()), mScreensaver, SLOT(partialForeground()));

    //setup user inactivity behaviour

    partialForegroundState->addTransition(mUserActivity, SIGNAL(active()), foregroundState);

    foregroundState->addTransition(mUserActivity, SIGNAL(notActive()), partialForegroundState);

    // power save state

    // set up transitions

    QEventTransition *toPartialForegroundTransition =

        new QEventTransition(qApp, QEvent::ApplicationActivate);

    toPartialForegroundTransition->setTargetState(partialForegroundState);

    backgroundState->addTransition(toPartialForegroundTransition);

    QEventTransition *toBackgroundTransition = 

        new QEventTransition(qApp, QEvent::ApplicationDeactivate);

    toBackgroundTransition->setTargetState(backgroundState);

    partialForegroundState->addTransition(toBackgroundTransition);

    QEventTransition *toBackgroundTransition2 =

        new QEventTransition(qApp, QEvent::ApplicationDeactivate);

    toBackgroundTransition2->setTargetState(backgroundState);

    foregroundState->addTransition(toBackgroundTransition2);

    setInitialState(partialForegroundState);

    SCREENSAVER_TEST_FUNC_EXIT("SnsrRootState::SnsrRootState")

}

/*!

    Destructs the class.

*/

SnsrRootState::~SnsrRootState()

{

    // mScreensaver deleted by parent

}

/*!

    This function is called when the state is entered.

*/

void SnsrRootState::onEntry(QEvent *event)

{

    QState::onEntry(event);

    qDebug() << objectName() << "- onEntry()";

    mScreensaver->initialize();

}

/*!

    This function is called when the state is exited.

*/

void SnsrRootState::onExit(QEvent *event)

{

    if (mCurrentView) {

        mMainWindow->removeView(mCurrentView);

    }

    mScreensaver->close();

    qDebug() << objectName() << "- onExit()";

    QState::onExit(event);

}

/*!

    Changes view in main window on widget.

    \param widget Widget with new view.

*/

void SnsrRootState::changeView(QGraphicsWidget *widget)

{

    SCREENSAVER_TEST_FUNC_ENTRY("SnsrRootState::changeView")

    qDebug("SnsrRootState::changeView() - widget: 0x%X", (int)widget);

    if (mCurrentView) {

        mCurrentView->hide();

        mMainWindow->removeView(mCurrentView);

    }

    mCurrentView = widget;

    if (mCurrentView) {

        mCurrentView->show();

        mMainWindow->addView(mCurrentView);

        mMainWindow->currentView()->setContentFullScreen(true);

    }

    SCREENSAVER_TEST_FUNC_EXIT("SnsrRootState::changeView")

}

/*!

    Invoked when screensaver faulted.

*/

void SnsrRootState::screensaverFaulted()

{

    qWarning() << "SnsrRootState::screensaverFaulted()";

    // TODO: some error handling

}