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===How can I change the contents of a menu according to the selected file in the editor?===

* Create your action and let it implement [http://bits.netbeans.org/dev/javadoc/org-openide-util/org/openide/util/actions/Presenter.Menu.html Presenter.Menu]
* Return a special <tt>JMenuItem</tt> subclass that implements [http://bits.netbeans.org/dev/javadoc/org-openide-awt/org/openide/awt/DynamicMenuContent.html DynamicMenuContent] from <tt>getMenuPresenter()</tt>
* Implement [http://bits.netbeans.org/dev/javadoc/org-openide-awt/org/openide/awt/DynamicMenuContent.html DynamicMenuContent] methods to return the desired menu content, using [http://bits.netbeans.org/dev/javadoc/org-openide-windows/org/openide/windows/TopComponent.Registry.html TopComponent.Registry] for finding the selected file in the editor.

https://bitbucket.org/jglick/dynamicmenudemo/ also does something similar.

===Can I hide or show a whole menu or toolbar?===

To hide a menu or toolbar you have to edit your <tt>layer.xml</tt> and append <tt>_hidden</tt> to the name of the desired menu or toolbar. You may also hide <tt>*.instance</tt> files.

<syntaxhighlight lang="xml" enclose="div" highlight="6">
<folder name="Menu">
    <!-- Hide View menu -->
    <folder name="View_hidden"/>
    <folder name="SomeMenu">
        <!-- Hide a single menu item -->
        <file name="SomeAction.instance_hidden"/>
    </folder>
</folder>
<folder name="Toolbars">
    <!-- Hide Edit toolbar -->
    <folder name="Edit_hidden"/>
</folder>
</syntaxhighlight >

It's generally much easier to do this from the NetBeans IDE, [http://forums.netbeans.org/post-77476.html as described here].

Note that to hide the Navigate menu one has to declare GoTo_hidden instead of Navigate_hidden (the menu was originally named GoTo, but was later renamed to Navigate by the means of Bundle.properties).

===Apache Migration Information===

The content in this page was kindly donated by Oracle Corp. to the
Apache Software Foundation.

This page was exported from http://wiki.netbeans.org/DevFaqSwitchingMenusByContext , 
that was last modified by NetBeans user Jglick 
on 2011-12-14T00:20:23Z.