Mercurial > projects > dwt2
annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/ObservableEvent.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.ObservableEvent; |
97 | 13 import org.eclipse.core.databinding.observable.IObservable; |
14 import org.eclipse.core.databinding.observable.IObservablesListener; | |
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15 |
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16 import java.lang.all; |
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17 |
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18 import java.util.EventObject; |
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19 |
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20 /** |
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21 * Abstract event object for events fired by {@link IObservable} objects. All |
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22 * events fired by observables must be derived from this class so that the way |
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23 * of dispatching events can be improved in later versions of the framework. |
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24 * |
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25 * @since 1.0 |
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26 * |
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27 */ |
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28 public abstract class ObservableEvent : EventObject { |
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29 |
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30 /** |
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31 * Creates a new observable event. |
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32 * |
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33 * @param source |
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34 */ |
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35 public this(IObservable source) { |
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36 super(source); |
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37 } |
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38 |
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39 /** |
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40 * |
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41 */ |
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42 private static final long serialVersionUID = 7693906965267871813L; |
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43 |
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44 /** |
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45 * Returns the observable that generated this event. |
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46 * |
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47 * @return the observable that generated this event |
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48 */ |
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49 public IObservable getObservable() { |
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50 return cast(IObservable) getSource(); |
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51 } |
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52 |
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53 /** |
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54 * Dispatch this event to the given listener. Subclasses must implement this |
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55 * method by calling the appropriate type-safe event handling method on the |
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56 * given listener according to the type of this event. |
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57 * |
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58 * @param listener |
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59 * the listener that should handle the event |
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60 */ |
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61 protected abstract void dispatch(IObservablesListener listener); |
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62 |
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63 /** |
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64 * Returns a unique object used for distinguishing this event type from |
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65 * others. |
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66 * |
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67 * @return a unique object representing the concrete type of this event. |
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68 */ |
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69 protected abstract Object getListenerType(); |
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70 |
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71 } |