genode/os/src/server/nitpicker/include/user_state.h

/*
 * \brief  Nitpicker user state handling
 * \author Norman Feske
 * \date   2006-08-09
 *
 * This class comprehends the policy of user interaction.
 * It manages the toggling of Nitpicker's different modes
 * and routes input events to corresponding client sessions.
 */

/*
 * Copyright (C) 2006-2013 Genode Labs GmbH
 *
 * This file is part of the Genode OS framework, which is distributed
 * under the terms of the GNU General Public License version 2.
 */

#ifndef _USER_STATE_H_
#define _USER_STATE_H_

#include <nitpicker_gfx/canvas.h>

#include "mode.h"
#include "menubar.h"
#include "view_stack.h"

class User_state : public Mode, public View_stack
{
	private:

		/*
		 * Number of currently pressed keys.
		 * This counter is used to determine if the user
		 * is dragging an item.
		 */
		unsigned _key_cnt;

		/*
		 * Menubar to display trusted labeling information
		 * according to the current Mitpicker mode and the
		 * focused view.
		 */
		Menubar *_menubar;

		/*
		 * Current mouse cursor position
		 */
		Point _mouse_pos;

		/*
		 * Currently pointed-at view
		 */
		View *_pointed_view;

	public:

		/**
		 * Constructor
		 */
		User_state(Canvas *canvas, Menubar *menubar);

		/**
		 * Handle input event
		 *
		 * This function controls the Nitpicker mode and the
		 * user state variables.
		 */
		void handle_event(Input::Event ev);

		/**
		 * Accessors
		 */
		Point mouse_pos()  { return _mouse_pos; }

		/**
		 * Mode interface
		 */
		void forget(View *);
};

#endif