/*
   ui/ui.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_H__
#define __INCLUDED_UI_H__

#include "ui/palette.h"
#include "ui/widget.h"
#include "ui/window.h"

namespace ui {

class UI : public Window {
public:
	/// constructor
	UI();

	/// destructor
	~UI();

	/// list widgets
	void list();

	/// list meus
	void list_menus();

	/// reload menu files
	void load();

	/// make a window the active window
	void show_window(char const *label);

	/// hide the active window
	void hide_window();

	/// return the active window
	Window *active() { return ui_active_window; }

	/// handle mouse cursor
	virtual void event_mousecursor(float x, float y);

	/// handle keyboard input
	virtual void event_keypress(unsigned int key, unsigned int modifier);
	virtual void event_keyrelease(unsigned int key, unsigned int modifier);

	/// run a user interface frame
	void frame();

	/// return the widget that has the focus
	inline Widget *focus() { return ui_focus; }

protected:
	virtual void add_window(Window *window);
	virtual void remove_window(Window *window);

private:
	Window			*ui_active_window;
	Widget			*ui_focus;
	math::Vector2f		 mouse_cursor;
};

/// initialize the user interface
void init();

/// shutdown the user interface
void shutdown();

/// the global root window
UI *root();

}

#endif //  __INCLUDED_UI_H__