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

**

** 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 "hbscreen_p.h"

#include "hbstyle.h"

#include "hbtoolbar.h"

#include "hbtoolbar_p.h"

#include "hbdockwidget.h"

#include "hbdockwidget_p.h"

#include "hbview.h"

#include "hbcontentwidget_p.h"

#include "hbmainwindow.h"

#include "hbevent.h"

#include "hbmainwindow_p.h"

#include <QGraphicsLayout>

#include <qcoreapplication.h>

/*!

  \class HbScreen

  \brief HbScreen represents the item that is the parent of all

  graphics items excluding the background.

  \internal

*/

HbScreen::HbScreen() : 

    HbWidget(), 

    mStack(0),

    mTb(0),

    mDock(0),

    mToolBarOrientation(0),

    mDelayedConstructionHandled(false),

    mScreenPolished(false)

{

}

void HbScreen::setStackWidget(HbContentWidget *stack) 

{

    if (mStack != stack) {

        if (mStack) {

            HbStyle::setItemName(mTb, QString());

            HbStyle::setItemName(mDock, QString());

        }

        mStack = stack; 

    }

}

void HbScreen::setToolBar(HbToolBar *tb)

{

    if (mTb != tb) {

        if (mTb) {

            disconnect(&HbToolBarPrivate::d_ptr(mTb)->core, 0, this, 0);

            HbStyle::setItemName(mTb, QString());

        }

        mTb = tb; 

        if (mTb) {

            setToolBarOrientation(mTb->orientation()); 

            if (mDelayedConstructionHandled){

                connect(&HbToolBarPrivate::d_ptr(mTb)->core, SIGNAL(orientationChanged()), this, SLOT(toolBarOrientationChanged()));

                connect(&HbToolBarPrivate::d_ptr(mTb)->core, SIGNAL(visibilityChanged()), this, SLOT(decoratorVisibilityChanged()));

            }

        } else {

            mToolBarOrientation = 0;

        }

    }

}

void HbScreen::setDockWidget(HbDockWidget *dock)

{

    if (mDock != dock) {

        if (mDock) {

            disconnect(&HbDockWidgetPrivate::d_ptr(mDock)->core, 0, this, 0);

            HbStyle::setItemName(mDock, QString());

        }

        mDock = dock; 

        if (mDock && mDelayedConstructionHandled) {

            connect(&HbDockWidgetPrivate::d_ptr(mDock)->core, SIGNAL(visibilityChanged()), this, SLOT(decoratorVisibilityChanged()));

        }

    }

}

void setName(QGraphicsWidget *item, const QString &name)

{

    if (item && (item->isVisible())) {

        HbStyle::setItemName(item, name);

    } else {

        HbStyle::setItemName(item, QString());

    }

}

void HbScreen::setToolBarName(bool forced)

{

    //we handle toolbar as a special case to

    //avoid unnecessary complications in setName function.

    if ((mTb->isVisible() || forced) && mTb->actions().count()) {

        HbStyle::setItemName(mTb, "toolbar");

    }

    else {

        HbStyle::setItemName(mTb, QString());

    }

}

void HbScreen::polish(HbStyleParameters& params)

{

    if (!mScreenPolished) {

        mScreenOrientation = mainWindow()->orientation();

        connect(mainWindow(), SIGNAL(orientationChanged(Qt::Orientation)), this, SLOT(screenOrientationChanged(Qt::Orientation)));

    }

    if (mStack) {

        HbView *currentView = qobject_cast<HbView*>(mStack->currentWidget());

        if (currentView && currentView->isContentFullScreen()) {

            setName(mStack, "mainfull");

        } else { 

            setName(mStack, "main");

        }

    }

    if (mTb) {

        bool hiddenForEffects = HbToolBarPrivate::d_ptr(mTb)->mOrientationEffectsRunning;

        setToolBarName(hiddenForEffects);

    }

    if (mDock) {

        setName(mDock,"dock");

    }

    mScreenPolished = true;

    HbWidget::polish(params);

    if (mTb && mDelayedConstructionHandled) {

        HbToolBarPrivate::d_ptr(mTb)->mDoLayout = true;

    }

    if (layout()) {

        layout()->activate();

    }

    HbMainWindow *w = mainWindow();

    HbMainWindowPrivate::d_ptr(w)->postIdleEvent(HbMainWindowPrivate::IdleOrientationEvent);   

}

void HbScreen::delayedConstruction()

{

    if (mDelayedConstructionHandled)

        return;

    mDelayedConstructionHandled = true;

    if (mTb) {

        connect( &HbToolBarPrivate::d_ptr ( mTb )->core, SIGNAL(orientationChanged()), this, SLOT(toolBarOrientationChanged()));

        connect( &HbToolBarPrivate::d_ptr ( mTb )->core, SIGNAL(visibilityChanged()), this, SLOT(decoratorVisibilityChanged()));

        HbToolBarPrivate::d_ptr(mTb)->delayedConstruction();

    }

    if (mDock) {

        connect(&HbDockWidgetPrivate::d_ptr(mDock)->core, SIGNAL(visibilityChanged()), this, SLOT(decoratorVisibilityChanged()));

    }

}

void HbScreen::setGeometry (const QRectF & rect)

{

    prepareGeometryChange();

    HbWidget::setGeometry(rect);

}

Qt::Orientation HbScreen::toolBarOrientation() const

{

    return (Qt::Orientation)mToolBarOrientation;

}

Qt::Orientation HbScreen::screenOrientation() const

{

    return mScreenOrientation;

}

bool HbScreen::contentUnderTitleBar() const

{

    bool contentUnderTitleBar = false;

    if (mStack) {

        HbView *currentView = qobject_cast<HbView*>(mStack->currentWidget());

        if (currentView && (currentView->viewFlags() 

                            & (HbView::ViewTitleBarMinimized | HbView::ViewTitleBarFloating 

                            | HbView::ViewTitleBarHidden))) {

            contentUnderTitleBar = true;

        }

    }

    return contentUnderTitleBar;

}

bool HbScreen::contentUnderStatusBar() const

{

    bool contentUnderStatusBar = false;

    if (mStack) {

        HbView *currentView = qobject_cast<HbView*>(mStack->currentWidget());

        if (currentView && (currentView->viewFlags() 

                            & (HbView::ViewStatusBarFloating | HbView::ViewStatusBarHidden))) {

            contentUnderStatusBar = true;

        }

    }

    return contentUnderStatusBar;

}

bool HbScreen::titleBarMinimizable() const

{

    bool titleBarMinimizable = false;

    if (mStack) {

        HbView *currentView = qobject_cast<HbView*>(mStack->currentWidget());

        if (currentView && (currentView->viewFlags() & (HbView::ViewTitleBarMinimizable))) {

            titleBarMinimizable = true;

        }

    }

    return titleBarMinimizable;

}

void HbScreen::screenOrientationChanged(Qt::Orientation orientation)

{

    if (mScreenOrientation != orientation) {

        mScreenOrientation = orientation;

        repolish();

        prepareGeometryChange();

    }

}

void HbScreen::toolBarOrientationChanged()

{

    setToolBarOrientation(mTb->orientation());

}

void HbScreen::setToolBarOrientation(Qt::Orientation orientation)

{

    if (orientation != mToolBarOrientation) {

        if (mTb){

            HbToolBarPrivate::d_ptr(mTb)->mDoLayout = false;

            repolish();

        }

        mToolBarOrientation = orientation;

    }

}

void HbScreen::decoratorVisibilityChanged()

{

    if (mTb) {

        HbToolBarPrivate::d_ptr(mTb)->mDoLayout = false;

    }

    repolish();

    QCoreApplication::sendPostedEvents(this, QEvent::Polish);

}

void HbScreen::currentViewChanged(HbView* view)

{

    Q_UNUSED(view);

    repolish();

}

bool HbScreen::event(QEvent *e)

{

    if (e->type() == HbEvent::DeviceProfileChanged) {

        // supress polishEvent() [which is called in HbWidget::event()] into repolish()

        repolish();

        return QGraphicsWidget::event(e);

    } else {

        return HbWidget::event(e);

    }

}