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1 | /******************************************************************************* |
2 | * Copyright (c) 2012 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
1ee4d327 | 13 | package org.eclipse.linuxtools.internal.lttng2.ui; |
a7780cc8 | 14 | |
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15 | import java.net.URL; |
16 | ||
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17 | import org.eclipse.jface.resource.ImageDescriptor; |
18 | import org.eclipse.jface.resource.ImageRegistry; | |
19 | import org.eclipse.swt.graphics.Image; | |
20 | import org.eclipse.ui.plugin.AbstractUIPlugin; | |
21 | import org.osgi.framework.BundleContext; | |
22 | ||
23 | /** | |
24 | * The activator class controls the plug-in life cycle | |
25 | */ | |
26 | public class Activator extends AbstractUIPlugin { | |
27 | ||
28 | // ------------------------------------------------------------------------ | |
29 | // Attributes | |
30 | // ------------------------------------------------------------------------ | |
31 | ||
32 | /** | |
33 | * The plug-in ID | |
34 | */ | |
35 | public static final String PLUGIN_ID = "org.eclipse.linuxtools.lttng2.ui"; //$NON-NLS-1$ | |
36 | ||
37 | /** | |
38 | * The shared instance | |
39 | */ | |
40 | private static Activator plugin; | |
41 | ||
42 | // ------------------------------------------------------------------------ | |
43 | // Constructors | |
44 | // ------------------------------------------------------------------------ | |
45 | ||
46 | /** | |
47 | * The constructor | |
48 | */ | |
49 | public Activator() { | |
50 | } | |
51 | ||
52 | // ------------------------------------------------------------------------ | |
53 | // Accessors | |
54 | // ------------------------------------------------------------------------ | |
55 | ||
56 | /** | |
57 | * Returns the shared instance | |
58 | * | |
59 | * @return the shared instance | |
60 | */ | |
61 | public static Activator getDefault() { | |
62 | return plugin; | |
63 | } | |
64 | ||
65 | // ------------------------------------------------------------------------ | |
66 | // AbstractUIPlugin | |
67 | // ------------------------------------------------------------------------ | |
68 | ||
69 | /* (non-Javadoc) | |
70 | * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext) | |
71 | */ | |
72 | @Override | |
73 | public void start(BundleContext context) throws Exception { | |
74 | super.start(context); | |
75 | plugin = this; | |
76 | } | |
77 | ||
78 | /* (non-Javadoc) | |
79 | * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext) | |
80 | */ | |
81 | @Override | |
82 | public void stop(BundleContext context) throws Exception { | |
83 | plugin = null; | |
84 | super.stop(context); | |
85 | } | |
86 | ||
87 | /* (non-Javadoc) | |
88 | * @see org.eclipse.ui.plugin.AbstractUIPlugin#initializeImageRegistry(org.eclipse.jface.resource.ImageRegistry) | |
89 | */ | |
90 | @Override | |
91 | protected void initializeImageRegistry(ImageRegistry reg) { | |
92 | } | |
93 | ||
94 | // ------------------------------------------------------------------------ | |
95 | // Operations | |
96 | // ------------------------------------------------------------------------ | |
97 | ||
98 | public Image getImageFromPath(String path) { | |
99 | return getImageDescripterFromPath(path).createImage(); | |
100 | } | |
101 | ||
102 | public ImageDescriptor getImageDescripterFromPath(String path) { | |
103 | return AbstractUIPlugin.imageDescriptorFromPlugin(PLUGIN_ID, path); | |
104 | } | |
105 | ||
106 | public Image getImageFromImageRegistry(String path) { | |
107 | Image icon = getImageRegistry().get(path); | |
108 | if (icon == null) { | |
109 | icon = getImageDescripterFromPath(path).createImage(); | |
110 | plugin.getImageRegistry().put(path, icon); | |
111 | } | |
112 | return icon; | |
113 | } | |
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114 | |
115 | /** | |
116 | * Loads the image in the plug-ins image registry (if necessary) and returns the image | |
117 | * @param url - URL relative to the Bundle | |
118 | * @return the image | |
119 | */ | |
120 | public Image loadIcon(String url) { | |
121 | String key = plugin.getBundle().getSymbolicName() + "/" + url; //$NON-NLS-1$ | |
122 | Image icon = plugin.getImageRegistry().get(key); | |
123 | if (icon == null) { | |
124 | URL imageURL = plugin.getBundle().getResource(url); | |
125 | ImageDescriptor descriptor = ImageDescriptor.createFromURL(imageURL); | |
126 | icon = descriptor.createImage(); | |
127 | plugin.getImageRegistry().put(key, icon); | |
128 | } | |
129 | return icon; | |
130 | } | |
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131 | |
132 | } |