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

 * 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 .        *

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

#ifndef ADWAITA_SPLITTER_PROXY_H

#define ADWAITA_SPLITTER_PROXY_H

#include "adwaita.h"

#include "adwaitaaddeventfilter.h"

#include <QEvent>

#include <QHoverEvent>

#include <QMainWindow>

#include <QMap>

#include <QMouseEvent>

#include <QSplitterHandle>

#include <QWidget>

namespace Adwaita

{

class SplitterProxy;

//* factory

class ADWAITAQT_EXPORT SplitterFactory : public QObject

{

    Q_OBJECT

public:

    //* constructor

    explicit SplitterFactory(QObject *parent)

        : QObject(parent)

        , _enabled(false)

    {

    }

    //* destructor

    virtual ~SplitterFactory()

    {

    }

    //* enabled state

    void setEnabled(bool);

    //* register widget

    bool registerWidget(QWidget *);

    //* unregister widget

    void unregisterWidget(QWidget *);

private:

    //* enabled state

    bool _enabled;

    //* needed to block ChildAdded events when creating proxy

    AddEventFilter _addEventFilter;

    //* pointer to SplitterProxy

    using SplitterProxyPointer = WeakPointer<SplitterProxy>;

    //* registered widgets

    using WidgetMap = QMap<QWidget *, SplitterProxyPointer>;

    WidgetMap _widgets;

};

//* splitter 'proxy' widget, with extended hit area

class SplitterProxy : public QWidget

{

    Q_OBJECT

public:

    //* constructor

    explicit SplitterProxy(QWidget *, bool = false);

    //* destructor

    virtual ~SplitterProxy();

    //* event filter

    virtual bool eventFilter(QObject *, QEvent *);

    //* enable state

    void setEnabled(bool);

    //* enable state

    bool enabled() const

    {

        return _enabled;

    }

protected:

    //* event handler

    virtual bool event(QEvent *);

protected:

    //* reset 'true' splitter widget

    void clearSplitter();

    //* keep track of 'true' splitter widget

    void setSplitter(QWidget *);

private:

    //* enabled state

    bool _enabled;

    //* splitter object

    WeakPointer<QWidget> _splitter;

    //* hook

    QPoint _hook;

    //* timer id

    int _timerId;

};

} // namespace Adwaita

#endif // ADWAITA_SPLITTER_PROXY_H