/*! \file   ButtonlMonitor.H c++/ButtonlMonitor.H
    \brief  C++ Button Control Class Interface
    \author Zhengrong.Zang@gmail.com
	\date   2013.10.01
	
    Defines interface to monitor RCX button
*/
// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
// 
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.

#ifndef _ButtonlMonitor_H_
#define _ButtonlMonitor_H_

#include <sys/program.h>
#include <dbutton.h>
#include <c++/Sound.H>

//extern volatile unsigned int button_etype;
//extern volatile unsigned int button_key;

//volatile unsigned int button_etype;	// pressed or released
//volatile unsigned int button_key;	// ONOFF, VIEW, PRGM, RUN

// key data pressed on RCX button
wakeup_t button_released_key(wakeup_t data) {
	return dbutton() & data;
}

// key data released on RCX button
wakeup_t button_pressed_key(wakeup_t data) {
	return !button_released_key(data);
}

// any key released on RCX button
wakeup_t button_released(wakeup_t data) {
	return (dbutton() & BUTTON_ONOFF) || (dbutton() & BUTTON_RUN) ||
			(dbutton() & BUTTON_VIEW) || (dbutton() & BUTTON_PROGRAM);
}

// any key pressed on RCX button
wakeup_t button_pressed(wakeup_t data) {
	return !button_released(data);
}

typedef void (*buttonaction)(int key);

class ButtonMonitor {
private:
	buttonaction bh;	// Button handler
	
public:
	ButtonMonitor(buttonaction controlled = (buttonaction)NULL) {
		bh = controlled;
	}
	
	void run() {
		while (!shutdown_requested()) {
			wait_event(&button_pressed, 0);
			Sound::beep();
			
			if (bh) {
				(*bh)(dbutton());
			}
		}
	}
};

#endif // _ButtonlMonitor_H_