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

**

** 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 HbWidgets 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 "hbcombodropdown_p.h"

#include "hbcombobox_p.h"

#include "hbwidget_p.h"

#include <hblistview.h>

#include <hbwidgetfeedback.h>

#include <hbinputvirtualkeyboard.h>

#include <hbtapgesture.h>

#include <hbpangesture.h>

#include <QGestureEvent>

#include <QGraphicsSceneMouseEvent>

class HbComboDropDownPrivate : public HbWidgetPrivate

{

};

HbComboDropDown::HbComboDropDown( HbComboBoxPrivate *comboBoxPrivate, QGraphicsItem *parent )

    :HbWidget( *new HbComboDropDownPrivate(), parent ),

     mList( 0 ),

     comboPrivate( comboBoxPrivate ),

     vkbOpened( false ),

     backgroundPressed( false )

{

    Q_D(HbComboDropDown);

    d->setBackgroundItem(HbStylePrivate::P_ComboBoxPopup_background);

    #if QT_VERSION >= 0x040600

    //this is to keep the focus in the previous widget.

    setFlag( QGraphicsItem::ItemIsPanel, true );

    setActive( false );

    #endif

}

HbComboDropDown::~HbComboDropDown( )

{

}

void HbComboDropDown::createList( )

{

   mList = new HbListView( this );

   mList->setLongPressEnabled( false );

   HbComboListViewItem *protoType = new HbComboListViewItem( this );

   mList->setItemPrototype( protoType );

   HbStyle::setItemName( mList, "list" );

   mList->setUniformItemSizes( true );

   mList->setSelectionMode( HbAbstractItemView::SingleSelection );

}

void HbComboDropDown::keypadOpened( )

{

    vkbOpened = true;

    comboPrivate->vkbOpened( );

}

void HbComboDropDown::keypadClosed( )

{

    vkbOpened = false;

    comboPrivate->vkbClosed( );

}

bool HbComboDropDown::eventFilter( QObject *obj, QEvent *event )

{

    Q_UNUSED( obj );

    bool accepted = false;

    if ( isVisible( ) ) {

        switch( event->type( ) )

        {

        case QEvent::GraphicsSceneMousePress:

        case QEvent::GraphicsSceneMouseDoubleClick:

            {

                if( !vkbOpened ) {

                    //if vkb is not opened and dropdown is not clicked then dismiss drop down

                    if( !( this->isUnderMouse( ) ) ) {

                        HbWidgetFeedback::triggered( this, Hb::InstantPopupClosed );

                        setVisible( false );

                        comboPrivate->q_ptr->setProperty("state","normal");

                        backgroundPressed = true;

                        accepted = true;

                    }

                } else {

                    //if vkb is opened then dismiss drop down only if click happened outside drop down and

                    //vkb area

                    if( comboPrivate->mEditable ) {

                        HbEditorInterface editorInterface( comboPrivate->q_ptr );

                        HbVkbHost *host = editorInterface.vkbHost( );

                        if( host ) {

                            //get the scene rect of vkb

                            QGraphicsWidget *vkbWidget = host->activeKeypad( )->asGraphicsWidget( );

                            QRectF tmp = host->applicationArea( );

                            QRectF vkbArea = vkbWidget->mapToScene( tmp ).boundingRect( );

                            QGraphicsSceneMouseEvent *mouseEvent = 

                                static_cast< QGraphicsSceneMouseEvent * >( event );

                            if( !( this->isUnderMouse( ) ) &&

                                !vkbArea.contains( mouseEvent->scenePos( ) ) ) {

                                HbWidgetFeedback::triggered( this, Hb::InstantPopupClosed );

                                setVisible( false );

                                comboPrivate->q_ptr->setProperty( "state", "normal" );

                                backgroundPressed = true;

                                accepted = true;

                            }

                        }

                    }

                }

            }

            break;

        case QEvent::Gesture:

            {

                if( !this->isUnderMouse( ) ) {

                    //if its a pan gesture then don't accept the event so that list can be scrolled

                    //even if mouse is outside drop down area. Also tap might finish outside the

                    //dropdown area

                    if( QGestureEvent *gestureEvent = static_cast<QGestureEvent *>( event ) ) {                        

                        HbTapGesture *tapGesture = qobject_cast<HbTapGesture *>(gestureEvent->gesture(Qt::TapGesture));

                        if( !qobject_cast<HbPanGesture *>( 

                                gestureEvent->gesture( Qt::PanGesture ) ) &&

                            !(tapGesture && tapGesture->state() != Qt::GestureStarted)) {

                            accepted = true;

                        }

                    }

                }

            }

            break;

        default:

            break;

        }

    }

    return accepted;

}

QVariant HbComboDropDown::itemChange( GraphicsItemChange change, const QVariant & value )

{

    switch( change ) {

        case QGraphicsItem::ItemVisibleHasChanged:

            if( !value.toBool( ) ) {

                comboPrivate->resetGeometryChangeFlag( );

            }

            break;

        default:

            break;

    }

    return HbWidget::itemChange( change, value );

}

#include "moc_hbcombodropdown_p.cpp"