1 package org.hedgewars.hedgeroid.netplay;

     2 

     3 import android.os.Handler;

     4 import android.os.Looper;

     5 import android.os.Message;

     6 

     7 /**

     8  * This class handles regularly calling a specified runnable

     9  * on the looper provided in the constructor. The first call

    10  * occurs without delay (though still via the looper), all

    11  * following calls are delayed by (approximately) the interval.

    12  * The interval can be changed at any time, which will cause

    13  * an immediate execution of the runnable again.

    14  */

    15 public class TickHandler extends Handler {

    16 	private final Runnable callback;

    17 	private int messageId;

    18 	private long interval;

    19 	private boolean running;

    20 	

    21 	public TickHandler(Looper looper, long interval, Runnable callback) {

    22 		super(looper);

    23 		this.callback = callback;

    24 		this.interval = interval;

    25 	}

    26 	

    27 	public synchronized void stop() {

    28 		messageId++;

    29 		running = false;

    30 	}

    31 	

    32 	public synchronized void start() {

    33 		messageId++;

    34 		sendMessage(obtainMessage(messageId));

    35 		running = true;

    36 	}

    37 	

    38 	public synchronized void setInterval(long interval) {

    39 		this.interval = interval;

    40 		if(running) {

    41 			start();

    42 		}

    43 	}

    44 	

    45 	@Override

    46 	public synchronized void handleMessage(Message msg) {

    47 		if(msg.what == messageId) {

    48 			callback.run();

    49 		}

    50 		if(msg.what == messageId) {

    51 			sendMessageDelayed(obtainMessage(messageId), interval);

    52 		}

    53 	}

    54 }