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Java > Open Source Codes > org > eclipse > ui > internal > quickaccess > PreferenceElement


1 /*******************************************************************************
2  * Copyright (c) 2006, 2007 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11
12 package org.eclipse.ui.internal.quickaccess;
13
14 import org.eclipse.jface.preference.IPreferenceNode;
15 import org.eclipse.jface.resource.ImageDescriptor;
16 import org.eclipse.swt.graphics.Image;
17 import org.eclipse.ui.IWorkbenchWindow;
18 import org.eclipse.ui.PlatformUI;
19 import org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog;
20
21 /**
22  * @since 3.3
23  *
24  */
25 public class PreferenceElement extends QuickAccessElement {
26
27     private static final String JavaDoc separator = " - "; //$NON-NLS-1$
28
29     private IPreferenceNode preferenceNode;
30
31     private String JavaDoc prefix;
32
33     /* package */PreferenceElement(IPreferenceNode preferenceNode, String JavaDoc prefix, PreferenceProvider preferenceProvider) {
34         super(preferenceProvider);
35         this.preferenceNode = preferenceNode;
36         this.prefix = prefix;
37     }
38
39     public void execute() {
40         IWorkbenchWindow window = PlatformUI.getWorkbench()
41                 .getActiveWorkbenchWindow();
42         if (window != null) {
43             WorkbenchPreferenceDialog dialog = WorkbenchPreferenceDialog
44                     .createDialogOn(window.getShell(), preferenceNode.getId());
45             dialog.open();
46         }
47     }
48
49     public String JavaDoc getId() {
50         return preferenceNode.getId();
51     }
52
53     public ImageDescriptor getImageDescriptor() {
54         Image image = preferenceNode.getLabelImage();
55         if (image != null) {
56             ImageDescriptor descriptor = ImageDescriptor.createFromImage(image);
57             return descriptor;
58         }
59         return null;
60     }
61
62     public String JavaDoc getLabel() {
63         if (prefix != null && prefix.length() > 0) {
64             return preferenceNode.getLabelText() + separator
65                     + prefix;
66         }
67         return preferenceNode.getLabelText();
68     }
69
70     public int hashCode() {
71         final int prime = 31;
72         int result = 1;
73         result = prime * result
74                 + ((preferenceNode == null) ? 0 : preferenceNode.hashCode());
75         return result;
76     }
77
78     public boolean equals(Object JavaDoc obj) {
79         if (this == obj)
80             return true;
81         if (obj == null)
82             return false;
83         if (getClass() != obj.getClass())
84             return false;
85         final PreferenceElement other = (PreferenceElement) obj;
86         if (preferenceNode == null) {
87             if (other.preferenceNode != null)
88                 return false;
89         } else if (!preferenceNode.equals(other.preferenceNode))
90             return false;
91         return true;
92     }
93 }
94
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