/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2011  Georg Rudoy
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 **********************************************************************/

#ifndef PLUGINS_POSHUKU_SMOOTHSCROLL_H
#define PLUGINS_POSHUKU_SMOOTHSCROLL_H
#include <QPoint>
#include <QTime>

class QWebFrame;
class QMouseEvent;

namespace LeechCraft
{
namespace Poshuku
{
	class SmoothScrollTicker;

	class SmoothScroll
	{
		friend class SmoothScrollTicker;

		enum State {
			SSteady,
			SPressed,
			SManualScroll,
			SAutoScroll,
			SStop
		} State_;

		int Threshold_;
		QPoint PressPos_;
		QPoint Offset_;
		QPoint Delta_;
		QPoint Speed_;
		SmoothScrollTicker *Ticker_;
		QTime Timestamp_;
		QWebFrame *Target_;
		QList<QEvent*> IgnoreList_;
	public:
		SmoothScroll ();

		int GetThreshold () const;
		void SetThreshold (int);

		void SetTarget (QWebFrame*);

		void HandleMousePress (QMouseEvent*);
		void HandleMouseMove (QMouseEvent*);
		void HandleMouseRelease (QMouseEvent*);
	private:
		QPoint GetScrollOffset () const;
		void SetScrollOffset (const QPoint&);
		void Tick ();
	};
}
}

#endif
