How can i make an action visible or not?

When I right click on a file in the tree, i want to have a new item there (under 'New'). And i want to control when this item/action is it visible or not.
How can i do this? (In a plugin)
Thank you!

2 comments
Comment actions Permalink

Please see http://confluence.jetbrains.com/display/IDEADEV/IntelliJ+IDEA+Action+System
Enabling/Visibility of actions can be controlled via com.intellij.openapi.actionSystem.Presentation


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Comment actions Permalink

Override method AnAction.update() and call AnActionEvent.getPresentation().setEnabled(), setVisible() or both. There are millions of examples in IntelliJ IDEA Community Edition source code.

BTW there's a dedicated forum for plugin developers: http://devnet.jetbrains.com/community/idea/open_api_and_plugin_development

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