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copied!<p>If your application is encapsulated as an eclipse product, you may tweak the <a href="http://dev.eclipse.org/newslists/news.eclipse.platform/msg71104.html" rel="nofollow noreferrer"><code>plugin.properties/plugin_customization.ini</code></a> file.<br> (file referenced by the '<code>preferenceCustomization</code>' property in your <a href="http://help.eclipse.org/ganymede/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/product_def_extpt.htm" rel="nofollow noreferrer"><em>product</em> extension point</a>.)<br> This file is a java.io.Properties format file. Typically this file is used to set the values for preferences that are published as part of a plug-in's public API.<br> (Example of <a href="http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.platform/plugin_customization.ini?revision=1.8&view=markup" rel="nofollow noreferrer">such a file for <code>org.eclipse.platform</code></a>)</p> <p>So if the string representing the order of perspective can be referenced as a property, you can define the default order in there.<br> Since the source code of <a href="http://kickjava.com/src/org/eclipse/ui/IWorkbenchPreferenceConstants.java.htm" rel="nofollow noreferrer"><code>IWorkbenchPreferenceConstants</code></a> mentions:</p> <pre><code> /** * Lists the extra perspectives to show in the perspective bar. * The value is a comma-separated list of perspective ids. * The default is the empty string. * * @since 3.2 */ public static final String JavaDoc PERSPECTIVE_BAR_EXTRAS = "PERSPECTIVE_BAR_EXTRAS"; //$NON-NLS-1$ </code></pre> <p>Maybe a line in the <code>plugin_customization.ini</code> file:</p> <pre><code>org.eclipse.ui/PERSPECTIVE_BAR_EXTRAS=perspectiveId1,perspectiveId2,perspectiveId3 </code></pre> <p>would allow you to specify that order without having to hard-code it.</p> <h2>Additional notes:</h2> <p><a href="http://kickjava.com/src/org/eclipse/ui/IPerspectiveRegistry.java.htm" rel="nofollow noreferrer">IPerspectiveRegistry</a> (or <a href="http://kickjava.com/src/org/eclipse/ui/internal/registry/PerspectiveRegistry.java.htm" rel="nofollow noreferrer">PerspectiveRegistry</a>) is not made to write anything (especially for perspective defined in an extension)</p> <p>Ordering may be found in the state of the workbench (stored in the workspace and then restored when its launched again, <code>.metadata/.plugins/org.eclipse.ui.workbench/workbench.xml</code>)</p> <p>Do you confirm that:</p> <pre><code>IPerspectiveRegistry registry = PlatformUI.getWorkbench().getPerspectiveRegistry(); IPerspectiveDescriptor[] perspectives = registry.getPerspectives(); </code></pre> <p>is not in the right order when the <code>plugin_customization.ini</code> does define that order correctly ?</p> <p><a href="https://stackoverflow.com/users/65412/liverpool-5-0-aston-villa">Liverpool 5 - 0 Aston Villa</a> does confirm that (in the comments), but also indicates the <strong>(ordered) ini file entries internally get recorded into preference store</strong>, which means they can be retrieved through the <strong>preference store API</strong>:</p> <pre><code>PatformUI.getPreferenceStore().getDefault( IWorkbenchPreferenceConstants.PERSPECTIVE_BAR_EXTRAS) </code></pre> <p>Liverpool 5 - 0 Aston Villa then add: </p> <blockquote> <p>perspective registry (the initial "<code>PlatformUI.getWorkbench().getPerspectiveRegistry().getPerspectives();</code>" bit) remains unaltered (and unordered).<br> But, you still can "<strong>readily access to ordered list of perspectives</strong>" through <strong>preference store</strong>.<br> So, for other tasks, instead of iterating though perspective registry (which is still unordered), we can use the ordered variable that stores list of ordered perpective ids. </p> </blockquote> <p>.<br> .<br> .<br> . </p> <hr> <p>Note: another possibility is to <a href="http://eclipsesource.com/blogs/2009/03/31/replacing-the-perspective-switcher-in-rcp-apps/" rel="nofollow noreferrer"><strong>Replace the Perspective-Switcher in RCP apps</strong></a></p> <p><img src="https://i.stack.imgur.com/7LACm.png" alt="alt text"> => to: <img src="https://i.stack.imgur.com/o77CJ.png" alt="alt text"></p> <p>You can more easily define the order in a menu or in buttons there.</p> <hr> <p>Extreme solution: <a href="http://www.richclient2.eu/2006_08_29/creating-your-own-perspective-switcher-a-first-try/" rel="nofollow noreferrer">re-implement a perspective switcher</a>. </p> <p><img src="https://i.stack.imgur.com/tCZVe.png" alt="http://www.richclient2.de/wp-content/uploads/2006/08/persp_header.png"></p>

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