/*****
 * ButtonBeep
 *
 *   A simple brick test class :
 *     Push RUN to start the program; it sounds a descending sequence.
 *     Then 
 *       pushing and releasing the VIEW button beeps twice, and
 *       pushing and releasing the PRGM button beeps thrice.
 *
 *  To test compilation on cs:
 *     $ . unix/environment
 *     $ lejosc ButtonBeep.java
 *  creates ButtonBeep.class
 *
 * Jim M
 * v 1.0 April 30  evening before class - compiled but not run on brick
 * v 1.5 May 1     in class on PC - found a few bugs, but it basically ran
 * v 2.0 May 1     after class put in bug fixes; added "press_and_release"
 *
 * $Id: ButtonBeep.java 13258 2007-05-01 16:21:57Z mahoney $
 ************/

import josx.platform.rcx.*;
// imported stuff includes :
//   Sound.beep(); Sound.buzz(); Sound.beepSequence();
//   TextLCD.print(String);  // up to 5 characters
//   Button

public class ButtonBeep {

    // Pause for a given number of seconds.
    public static void wait(double seconds){
        try {
	    Thread.sleep((long)(seconds*1000.0));
        }
        catch (InterruptedException ie){
        }
    }

    // If the button isn't being pressed, return false immediately.
    // If it is being pressed, wait for release, and then return true.
    public static boolean press_and_release(Button b){
	boolean state = b.isPressed();
	if (state){
	    while (b.isPressed()){
	    }
	}
	return state;
    }

    // Beep n times with a short delay between beeps.
    public static void nBeeps(int n){
	double timeBetweenBeeps = 0.3;  // seconds
        for (int i=0; i<n; i++){
	    Sound.beep();
	    wait(timeBetweenBeeps);        
	}
    }
 
    public static void main(String [] args) {
	Sound.beepSequence();
        while (true){
	    if (press_and_release(Button.VIEW)){
		nBeeps(2);
	    }
	    else if (press_and_release(Button.PRGM)){
		nBeeps(3);
	    }
	    else {
	    }
	}
    }

}