//////////////////////////////////////////////////////////////////////////////

// adwaitastackedwidgetdata.cpp

// data container for QStackedWidget transition

// -------------------

//

// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to

// deal in the Software without restriction, including without limitation the

// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

// sell copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

// IN THE SOFTWARE.

//////////////////////////////////////////////////////////////////////////////

#include "adwaitastackedwidgetdata.h"

namespace Adwaita

{

    //______________________________________________________

    StackedWidgetData::StackedWidgetData( QObject* parent, QStackedWidget* target, int duration ):

        TransitionData( parent, target, duration ),

        _target( target ),

        _index( target->currentIndex() )

    {

        // configure transition

        connect( _target.data(), SIGNAL(destroyed()), SLOT(targetDestroyed()) );

        connect( _target.data(), SIGNAL(currentChanged(int)), SLOT(animate()) );

        // disable focus

        transition().data()->setAttribute(Qt::WA_NoMousePropagation, true);

        transition().data()->setFlag(TransitionWidget::PaintOnWidget, true);

        setMaxRenderTime( 50 );

    }

    //___________________________________________________________________

    bool StackedWidgetData::initializeAnimation( void )

    {

        // check enability

        if( !( _target && _target.data()->isVisible() ) )

        { return false; }

        // check index

        if( _target.data()->currentIndex() == _index )

        { return false; }

        // do not animate if either index or currentIndex is not valid

        // but update _index none the less

        if( _target.data()->currentIndex() < 0 || _index < 0 )

        {

            _index = _target.data()->currentIndex();

            return false;

        }

        // get old widget (matching _index) and initialize transition

        if( QWidget *widget = _target.data()->widget( _index ) )

        {

            transition().data()->setOpacity( 0 );

            startClock();

            transition().data()->setGeometry( widget->geometry() );

            transition().data()->setStartPixmap( transition().data()->grab( widget ) );

            _index = _target.data()->currentIndex();

            return !slow();

        } else {

            _index = _target.data()->currentIndex();

            return false;

        }

    }

    //___________________________________________________________________

    bool StackedWidgetData::animate( void )

    {

        // check enability

        if( !enabled() ) return false;

        // initialize animation

        if( !initializeAnimation() ) return false;

        // show transition widget

        transition().data()->show();

        transition().data()->raise();

        transition().data()->animate();

        return true;

    }

    //___________________________________________________________________

    void StackedWidgetData::finishAnimation( void )

    {

        // disable updates on currentWidget

        if( _target && _target.data()->currentWidget() )

        { _target.data()->currentWidget()->setUpdatesEnabled( false ); }

        // hide transition

        transition().data()->hide();

        // reenable updates and repaint

        if( _target && _target.data()->currentWidget() )

        {

            _target.data()->currentWidget()->setUpdatesEnabled( true );

            _target.data()->currentWidget()->repaint();

        }

        // invalidate start widget

        transition().data()->resetStartPixmap();

    }

    //___________________________________________________________________

    void StackedWidgetData::targetDestroyed( void )

    {

        setEnabled( false );

        _target.clear();

    }

}