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1 /* |
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2 * Hedgewars for Android. An Android port of Hedgewars, a free turn based strategy game |
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3 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com> |
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4 * |
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5 * This program is free software; you can redistribute it and/or |
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6 * modify it under the terms of the GNU General Public License |
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7 * as published by the Free Software Foundation; either version 2 |
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8 * of the License, or (at your option) any later version. |
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9 * |
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10 * This program is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 * GNU General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU General Public License |
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16 * along with this program; if not, write to the Free Software |
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 */ |
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19 |
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20 package org.hedgewars.hedgeroid.util; |
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21 |
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22 import android.os.Handler; |
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23 import android.os.Looper; |
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24 import android.os.Message; |
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25 |
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26 /** |
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27 * This class allows you to define a runnable that is called when there has been |
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28 * no activity for a set amount of time, where activity is determined by calls |
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29 * to the activity() method of the handler. It is used to update the map preview |
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30 * when there have been no updates to the relevant map information for a time, |
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31 * to prevent triggering several updates at once when different parts of the |
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32 * information change. |
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33 */ |
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34 public final class CalmDownHandler extends Handler { |
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35 int runningMessagesCounter = 0; |
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36 final Runnable inactivityRunnable; |
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37 final long inactivityMs; |
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38 boolean stopped; |
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39 |
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40 public CalmDownHandler(Looper looper, Runnable runnable, long inactivityMs) { |
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41 super(looper); |
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42 this.inactivityRunnable = runnable; |
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43 this.inactivityMs = inactivityMs; |
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44 } |
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45 |
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46 public void activity() { |
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47 runningMessagesCounter++; |
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48 sendMessageDelayed(obtainMessage(), inactivityMs); |
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49 } |
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50 |
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51 @Override |
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52 public void handleMessage(Message msg) { |
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53 runningMessagesCounter--; |
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54 if(runningMessagesCounter==0 && !stopped) { |
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55 inactivityRunnable.run(); |
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56 } |
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57 } |
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58 |
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59 public void stop() { |
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60 stopped = true; |
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61 } |
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62 } |