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

 * Copyright (C) 2014 by Hugo Pereira Da Costa <hugo.pereira@free.fr>    *

 *                                                                       *

 * This program is free software; you can redistribute it and/or modify  *

 * it under the terms of the GNU General Public License as published by  *

 * the Free Software Foundation; either version 2 of the License, or     *

 * (at your option) any later version.                                   *

 *                                                                       *

 * This program is distributed in the hope that it will be useful,       *

 * but WITHOUT ANY WARRANTY; without even the implied warranty of        *

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *

 * GNU General Public License for more details.                          *

 *                                                                       *

 * You should have received a copy of the GNU General Public License     *

 * along with this program; if not, write to the                         *

 * Free Software Foundation, Inc.,                                       *

 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *

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

#include "adwaitawidgetexplorer.h"

#include "adwaita.h"

#include <QTextStream>

#include <QApplication>

#include <QMouseEvent>

#include <QPainter>

namespace Adwaita

{

    //________________________________________________

    WidgetExplorer::WidgetExplorer( QObject* parent ):

        QObject( parent ),

        _enabled( false ),

        _drawWidgetRects( false )

    {

        _eventTypes.insert( QEvent::Enter, QStringLiteral( "Enter" ) );

        _eventTypes.insert( QEvent::Leave, QStringLiteral( "Leave" ) );

        _eventTypes.insert( QEvent::HoverMove, QStringLiteral( "HoverMove" ) );

        _eventTypes.insert( QEvent::HoverEnter, QStringLiteral( "HoverEnter" ) );

        _eventTypes.insert( QEvent::HoverLeave, QStringLiteral( "HoverLeave" ) );

        _eventTypes.insert( QEvent::MouseMove, QStringLiteral( "MouseMove" ) );

        _eventTypes.insert( QEvent::MouseButtonPress, QStringLiteral( "MouseButtonPress" ) );

        _eventTypes.insert( QEvent::MouseButtonRelease, QStringLiteral( "MouseButtonRelease" ) );

        _eventTypes.insert( QEvent::FocusIn, QStringLiteral( "FocusIn" ) );

        _eventTypes.insert( QEvent::FocusOut, QStringLiteral( "FocusOut" ) );

        // _eventTypes.insert( QEvent::Paint, "Paint" );

    }

    //________________________________________________

    void WidgetExplorer::setEnabled( bool value )

    {

        if( value == _enabled ) return;

        _enabled = value;

        qApp->removeEventFilter( this );

        if( _enabled )  qApp->installEventFilter( this );

    }

    //________________________________________________

    bool WidgetExplorer::eventFilter( QObject* object, QEvent* event )

    {

//         if( object->isWidgetType() )

//         {

//             QString type( _eventTypes[event->type()] );

//             if( !type.isEmpty() )

//             {

//                 QTextStream( stdout ) << "Adwaita::WidgetExplorer::eventFilter - widget: " << object << " (" << object->metaObject()->className() << ")";

//                 QTextStream( stdout ) << " type: " << type  << endl;

//             }

//         }

        switch( event->type() )

        {

            case QEvent::Paint:

            if( _drawWidgetRects )

            {

                QWidget* widget( qobject_cast<QWidget*>( object ) );

                if( !widget ) return false;

                QPainter painter( widget );

                painter.setRenderHints(QPainter::Antialiasing);

                painter.setBrush( Qt::NoBrush );

                painter.setPen( Qt::red );

                painter.drawRect( widget->rect() );

                painter.end();

            }

            break;

            case QEvent::MouseButtonPress:

            {

                // cast event and check button

                QMouseEvent* mouseEvent( static_cast<QMouseEvent*>( event ) );

                if( mouseEvent->button() != Qt::LeftButton ) break;

                // case widget and check (should not be necessary)

                QWidget* widget( qobject_cast<QWidget*>(object) );

                if( !widget ) return false;

                QTextStream( stdout )

                    << "Adwaita::WidgetExplorer::eventFilter -"

                    << " event: " << event << " type: " << eventType( event->type() )

                    << " widget: " << widgetInformation( widget )

                    << endl;

                // print parent information

                QWidget* parent( widget->parentWidget() );

                while( parent )

                {

                    QTextStream( stdout ) << "    parent: " << widgetInformation( parent ) << endl;

                    parent = parent->parentWidget();

                }

                QTextStream( stdout ) << "" << endl;

            }

            break;

            default: break;

        }

        // always return false to go on with normal chain

        return false;

    }

    //________________________________________________

    QString WidgetExplorer::eventType( const QEvent::Type& type ) const

    {

        switch( type )

        {

            case QEvent::MouseButtonPress: return QStringLiteral( "MouseButtonPress" );

            case QEvent::MouseButtonRelease: return QStringLiteral( "MouseButtonRelease" );

            case QEvent::MouseMove: return QStringLiteral( "MouseMove" );

            default: return QStringLiteral( "Unknown" );

        }

    }

    //________________________________________________

    QString WidgetExplorer::widgetInformation( const QWidget* widget ) const

    {

        QRect r( widget->geometry() );

        const char* className( widget->metaObject()->className() );

        QString out;

        QTextStream( &out ) << widget << " (" << className << ")"

            << " position: " << r.x() << "," << r.y()

            << " size: " << r.width() << "," << r.height()

            << " sizeHint: " << widget->sizeHint().width() << "," << widget->sizeHint().height()

            << " minimumSizeHint: " << widget->minimumSizeHint().width() << "," << widget->minimumSizeHint().height()

            << " hover: " << widget->testAttribute( Qt::WA_Hover );

        return out;

    }

}