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Home » Eclipse Projects » Rich Client Platform (RCP) » Commands and dynamic menu
Commands and dynamic menu [message #1804260] Thu, 21 March 2019 11:38 Go to next message
vlad tsepesh is currently offline vlad tsepeshFriend
Messages: 5
Registered: January 2012
Junior Member
Hi all,

I'm developing an RCP application in which I had to communicate data over a COM port.
I'd like the plugin dedicated to the serial communication had a contribution to the menu in order to select the port to which the data had to be sent.

The plugin declare an extension point to make the contribution
               label="COM Port">

The class my.rcp.protocol.command.ComPortEnumeration is a subclass of org.eclipse.ui.menus.ExtensionContributionFactory for every available COM port it creates an instance of org.eclipse.ui.menus.CommandContributionItemParameter and add to the via the addContributionItem() method as adapted from an example out there in the web, i.e. a Vogella one.

Unfortunately the result is not what I want, we get an unusable menu because is itself disable.


The first question is obvious, how do I get the menu enabled?

And the second one: how to connect a command, with the name of the Port as a a parameter, to perform the binding to the selected COM port?


  • Attachment: menu.png
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Re: Commands and dynamic menu [message #1805185 is a reply to message #1804260] Tue, 09 April 2019 13:18 Go to previous message
Eclipse UserFriend
A bit late, but... Commands are bound to (possibly many) handlers. If your entry is disabled it's either because a handler cannot be found or the handler is not enabled.

You can use command parameters to pass along parameters. Your handler will receive an ExecutionEvent object with the parameter map.

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