/*
   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/font.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(const char *label);

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

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

	/// mouse cursor input
	void input_mouse(float x, float y);

	/// keyboard input
	void input_key(bool pressed, unsigned int key, unsigned int modifier);

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

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

	/* -- Fonts ------------------------------------------------ */
	/// default small font
	inline Font *font_small() { return ui_font_small; }

	/// default medium font
	inline Font *font_large() { return ui_font_large; }

protected:
	Window *find_window(const char *label);

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

	/// handle keyboard input
	virtual bool keypress(unsigned int key, unsigned int modifier);
	virtual bool keyrelease(unsigned int key, unsigned int modifier);

private:
	Palette			*ui_palette;
	Font			*ui_font_small;
	Font			*ui_font_large;

	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__