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annotate org.eclipse.core.commands/src/org/eclipse/core/commands/common/AbstractNamedHandleEvent.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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bc29606a740c Added dwt-addons in original directory structure of eclipse.org
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1 /*******************************************************************************
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2 * Copyright (c) 2005 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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11
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12 module org.eclipse.core.commands.common.AbstractNamedHandleEvent;
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13
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14 import org.eclipse.core.commands.common.AbstractHandleObjectEvent;
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15
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16 /**
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17 * <p>
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18 * An event fired from a <code>NamedHandleObject</code>. This provides
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19 * notification of changes to the defined state, the name and the description.
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20 * </p>
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21 *
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22 * @since 3.1
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23 */
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24 public abstract class AbstractNamedHandleEvent :
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25 AbstractHandleObjectEvent {
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26
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27 /**
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28 * The bit used to represent whether the category has changed its
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29 * description.
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30 */
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31 protected static const int CHANGED_DESCRIPTION = 1 << LAST_BIT_USED_ABSTRACT_HANDLE;
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32
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33 /**
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34 * The bit used to represent whether the category has changed its name.
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35 */
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36 protected static const int CHANGED_NAME = 1 << LAST_BIT_USED_ABSTRACT_HANDLE;
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37
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38 /**
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39 * The last used bit so that subclasses can add more properties.
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40 */
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41 protected static const int LAST_USED_BIT = CHANGED_NAME;
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42
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43 /**
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44 * Constructs a new instance of <code>AbstractHandleObjectEvent</code>.
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45 *
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46 * @param definedChanged
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47 * <code>true</code>, iff the defined property changed.
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48 * @param descriptionChanged
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49 * <code>true</code>, iff the description property changed.
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50 * @param nameChanged
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51 * <code>true</code>, iff the name property changed.
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52 */
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53 protected this(bool definedChanged,
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54 bool descriptionChanged, bool nameChanged) {
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55 super(definedChanged);
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56
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57 if (descriptionChanged) {
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58 changedValues |= CHANGED_DESCRIPTION;
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59 }
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60 if (nameChanged) {
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61 changedValues |= CHANGED_NAME;
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62 }
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63 }
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64
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65 /**
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66 * Returns whether or not the description property changed.
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67 *
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68 * @return <code>true</code>, iff the description property changed.
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69 */
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70 public final bool isDescriptionChanged() {
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71 return ((changedValues & CHANGED_DESCRIPTION) !is 0);
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72 }
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73
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74 /**
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75 * Returns whether or not the name property changed.
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76 *
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77 * @return <code>true</code>, iff the name property changed.
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78 */
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79 public final bool isNameChanged() {
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80 return ((changedValues & CHANGED_NAME) !is 0);
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81 }
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82
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83 }