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Call to a command defined in another plugin [message #894368]

Sun, 08 July 2012 19:17

Vince Cadmus

Messages: 16
Registered: July 2012

Junior Member

In an RCP application (not a plugin), I would like to trigger to Preferences Dialog opening. So in the application model, I tried to define a command, and in the corresponding handler to execute the standard "org.eclipse.ui.window.preferences" command :

public class PrefsHandler {
	@Inject
	ECommandService commandService;
	@Inject
	EHandlerService handlerService;

	@Execute
	public void execute() {
		Command cmd = commandService
				.getCommand("org.eclipse.ui.window.preferences");
		ParameterizedCommand parmCommand = new ParameterizedCommand(cmd, null);
		handlerService.executeHandler(parmCommand);
	}

}

Nothing happens, and when I try to debug I see the cmd command is found, but that no handler is found in context by the handlerService.

In the org.eclipse.ui plugin, the "org.eclipse.ui.window.preferences" command is defined with a "org.eclipse.ui.internal.handlers.ShowPreferencePageHandler" default handler, so I guessed it would use this handler to execute the command.

Have I missed something ?

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Re: Call to a command defined in another plugin [message #894520 is a reply to message #894368]

Mon, 09 July 2012 14:00

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

Are you running the 4.2 Workbench in your RCP app? Or is it an Eclipse4 application?

PW

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Call to a command defined in another plugin [message #894538 is a reply to message #894368]

Mon, 09 July 2012 14:28

Eclipse User

Also when using handlers (4.2 style) inject the needed services in the @Execute method and not through field injection.

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Re: Call to a command defined in another plugin [message #894619 is a reply to message #894538]

Mon, 09 July 2012 20:18

Vince Cadmus

Messages: 16
Registered: July 2012

Junior Member

It's an Eclipse4 RCP Application, I defined the menu (and all the UI) in the Application.e4xmi file, but I would like to be able to re-use some functionalities coming from "standard" ui plugins (like the preferences page, eg). I hoped I could reference the "org.eclipse.ui.window.preferences" command directly in my HandledMenuItem in the application file, but I couldn't achieve this, that's why I tried to define my own command and a specific handler triggering the "org.eclipse.ui.window.preferences" command (which is defined in org.eclipse.ui plugin).

I changed the prototype of my @Execute to inject the services as parameters (and not as fields), but same thing Sad

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Re: Call to a command defined in another plugin [message #894882 is a reply to message #894619]

Tue, 10 July 2012 22:05

Vince Cadmus

Messages: 16
Registered: July 2012

Junior Member

Well, in fact, trying to do the same in an Eclipse 3.x way, I don't know if I'm doing it well :

In an Eclipse 3.x RCP application, I just tried to add in the plugin.xml a menu contribution with a menu/command targetting the org.eclipse.ui.window.preferences command (just filling the commandId attribute of the menuContribution/menu/command element). And it works !

The trouble is that in an Application.e4xmi file, I couldn't do the same : when trying to fill the Command for my HandledMenuItem (using the "find" button in the model editor), I can only choose commands described in this same file, nothing coming from other plugins ! By the way, I think the plugin.xml editor uses the listed dependencies to look for the commands, but as the Application.e4mi file does not list any dependency, I'm not sure it could be possible to achieve the same.

So the question becomes : in an Application.e4xmi file, how can I use in a menu a command defined in another plugin ? As it is possible using the extensions of the plugin.xml file for a 3.x RCP application, I guess it should also be possible for an Eclipse 4 application, but I can't find how Sad

Thanks !

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Re: Call to a command defined in another plugin [message #895123 is a reply to message #894882]

Wed, 11 July 2012 18:20

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

Eclipse4 doesn't use the plugin.xml for commands and menu contributions at the moment, so it doesn't read o.e.ui.commands.

Don't you either have your commands and menu items defined in the model, or defined in fragments?

PW

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Call to a command defined in another plugin [message #896000 is a reply to message #895123]

Mon, 16 July 2012 19:53

Vince Cadmus

Messages: 16
Registered: July 2012

Junior Member

I was trying to use in my model (the Applicatiobn.e4xmi file) a command defined in a standard 3.X module (to open the prefs dialog), and I think I have more or less understood my problem : to use a 3.x plugin with UI contributions, you have to start the Eclipse 4 application in compatibiliy mode (using the IDEApplication for instance). If you develop and start an Eclipse 4 application without using this compatibility mode, you won't be able to use UI contributions (eg commands or menus) from 3.X plugins. Right ?

But so I have another question : isn'it possible to mix 3.x and 4 plugins (with UI contributions) in the same application ? As most the "standard" plugins (let's say, the ones coming with "Eclipse for J2EE") are still 3.x modules, can't I use them in a Eclipse 4 application without the compatibiliy layer ? And if I have to use the compatibility layer, so does it mean I won't be able to run in this Eclipse 4 application some 4.x plugins with UI contributions (or may be the compatibility layer is able to use both 3.x and 4.x plugins, reading both UI extension points from plugin.xml and contributions from fragments ?). If for instance I need to develop some plugins (with UI contributions) that I would like to make available in a standard Eclipse workbench, but also use in a standalone application, can't I develop them using Eclipse 4 UI features ?

I'm afraid I'm a bit lost with this (and not sure this is the right forum to ask about this, if not just tell me Wink

)

[Updated on: Mon, 16 July 2012 19:54]

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Re: Call to a command defined in another plugin [message #896129 is a reply to message #896000]

Tue, 17 July 2012 11:06

Brian de Alwis

Messages: 242
Registered: July 2009

Senior Member

No, at the moment you can't easily mix E4 and E3.x -- the compat layer assumes it's in total control. I'd one of the aras we plan to relax in 4.3.

In terms of where to post: there are more people in the Eclipse 4 forum, but it's ok to post here too.

Brian,

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