Display a pulldown item in Eclipse programatically

I know that I can declare actions in plugin.xml that specify style="pulldown" in order to make a pulldown style toolbar button, but I want to be able to do it programatically, using the IToolBarManager and IContributionItem interfaces.

I've looked through the interfaces, and the implementations of various things in eclipse, but I can't see how I'd do it. Ideally I want to 开发者_JS百科add such a toolbar item from an IEditorActionBarContributor implementation.

Anyone got any ideas?

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In answer to my own question, you need to create an Action object, and then call setMenuCreator on the action. Then when you add the action to the toolbar you'll get a drop down menu.