Mercurial > projects > dwt2
annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/StaleEvent.d @ 97:c86eb8b3098e
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author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 21 Apr 2009 11:18:25 +0200 |
parents | b74ac5dfcc06 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2006, 2007 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 *******************************************************************************/ |
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12 module org.eclipse.core.databinding.observable.StaleEvent; |
97 | 13 import org.eclipse.core.databinding.observable.IStaleListener; |
14 import org.eclipse.core.databinding.observable.ObservableEvent; | |
15 import org.eclipse.core.databinding.observable.IObservable; | |
16 import org.eclipse.core.databinding.observable.IObservablesListener; | |
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17 |
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18 import java.lang.all; |
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19 |
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20 /** |
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21 * Generic event denoting that the state of an {@link IObservable} object is |
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22 * about to change. Note that this event is only fired when an observable |
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23 * becomes stale, not when it becomes unstale; an observable that becomes |
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24 * unstale should always fire a change event. Staleness can be used (for |
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25 * example) to notify listeners when an observable has started a background |
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26 * thread for updating its state. Clients can safely ignore staleness. |
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27 * |
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28 * @see IObservable#isStale() |
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29 * |
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30 * @since 1.0 |
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31 * |
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32 */ |
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33 public class StaleEvent : ObservableEvent { |
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34 |
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35 /** |
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36 * Creates a new stale event. |
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37 * |
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38 * @param source |
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39 * the source observable |
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40 */ |
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41 public this(IObservable source) { |
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42 super(source); |
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43 } |
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44 |
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45 /** |
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46 * |
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47 */ |
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48 private static final long serialVersionUID = 3491012225431471077L; |
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49 |
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50 static final Object TYPE = new Object(); |
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51 |
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52 protected void dispatch(IObservablesListener listener) { |
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53 (cast(IStaleListener) listener).handleStale(this); |
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54 } |
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55 |
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56 protected Object getListenerType() { |
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57 return TYPE; |
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58 } |
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59 |
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60 } |