/*
   ui/scrollpane.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_UI_SCROLLPANE_H__
#define __INCLUDED_UI_SCROLLPANE_H__

#include "ui/widget.h"
#include "ui/definitions.h"

namespace ui
{

/// a widget displaying centered text
class ScrollPane : public Widget
{
public:
	ScrollPane(Widget *parent, ui::Text &text);
	~ScrollPane();

	/* -- inspectors ------------------------------------------- */

	/// current scroll position
	inline int scroll() const {
		return scrollpane_scroll;
	}
	
	/// current scroll offset
	inline int offset() const {
		return scrollpane_offset;
	}

	/// text alignment
	inline unsigned int alignment() const {
		return scrollpane_alignment;
	}

	/* -- mutators --------------------------------------------- */

	/// set scroll
	void set_scroll(const int scroll);
	
	/// set scroll offset
	void set_offset(const int offset);

	/// increase scroll
	void inc_scroll(const int scroll);

	/// decrease scroll
	void dec_scroll(const int scroll);

	/// set text alignment
	void set_alignment(const unsigned int alignment);

protected:
	/// draw the scroll pane
	virtual void draw();
	
	
	/**
	 * @brief mousehweel event handler
	 * */
	virtual bool on_mousewheel(const math::Vector2f & direction);

private:
	ui::Text		&scrollpane_text;
	int			scrollpane_scroll;
	int			scrollpane_offset;
	unsigned int		scrollpane_alignment;
};

}

#endif // __INCLUDED_UI_SCROLLPANE_H__