//////////////////////////////////////////////////////////////////////////////
// oxygenprogressbar.cpp
// data container for progressbar animations
// -------------------
//
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo@oxygen-icons.org>
//
// 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 "oxygenprogressbardata.h"
#include "oxygenprogressbardata.moc"

#include <QtGui/QProgressBar>
#include <cassert>

namespace Oxygen
{

    //______________________________________________
    ProgressBarData::ProgressBarData( QObject* parent, QWidget* target, int duration ):
        GenericData( parent, target, duration ),
        startValue_(0),
        endValue_(0)
    {

        target->installEventFilter( this );

        // set animation curve shape
        animation().data()->setEasingCurve( QEasingCurve::InOutQuad );

        // make sure target is a progressbar and store relevant values
        QProgressBar* progress = qobject_cast<QProgressBar*>( target );
        assert( progress );
        setStartValue( progress->value() );
        setEndValue( progress->value() );

        // setup connections
        connect( target, SIGNAL( valueChanged( int ) ), SLOT( valueChanged( int ) ) );

    }

    //______________________________________________
    bool ProgressBarData::eventFilter( QObject* object, QEvent* event )
    {

        if( !( enabled() && object && object == target().data() ) ) return AnimationData::eventFilter( object, event );
        switch( event->type() )
        {
            case QEvent::Show:
            {

                // reset start and end value
                QProgressBar* progress = static_cast<QProgressBar*>( target().data() );
                setStartValue( progress->value() );
                setEndValue( progress->value() );
                break;

            }

            case QEvent::Hide:
            {
                if( animation().data()->isRunning() )
                { animation().data()->stop(); }
                break;
            }

            default: break;

        }

        return AnimationData::eventFilter( object, event );

    }

    //______________________________________________
    void ProgressBarData::valueChanged( int value )
    {

        // do nothing if not enabled
        if( !enabled() ) return;

        // do nothing if progress is invalid
        QProgressBar* progress = static_cast<QProgressBar*>( target().data() );
        if( !( progress && progress->maximum() != progress->minimum() ) ) return;

        // update start and end values
        bool isRunning( animation().data()->isRunning() );
        if( isRunning )
        {

            // in case next value arrives while animation is running,
            // end animation, set value immediately
            // and trigger target update. This increases responsiveness of progressbars
            setStartValue( value );
            setEndValue( value );
            animation().data()->stop();
            setOpacity(0);

            if( target() ) target().data()->update();

            return;

        }

        setStartValue( endValue() );
        setEndValue( value );

        // start animation only if target is enabled, visible, not running,
        // and if end and start values are different enough
        // (with end value being larger than start value)
        if( !(target() && target().data()->isEnabled() && target().data()->isVisible()) ) return;
        if( isRunning || endValue()-startValue() < 2 ) return;

        animation().data()->start();

    }

}
