Home » Eclipse Projects » Rich Client Platform (RCP) » Execute a command programmatically, matching with a given selection [SOLVED]
| Execute a command programmatically, matching with a given selection [SOLVED] [message #493183] |
Fri, 23 October 2009 14:20  |
 Jacques LESCOT
Messages: 247
Registered: July 2009 |
Senior Member |
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I am having some troubles while trying to execute a command programmatically, when a "count" condition is specified. Let me explain the problem :
I have defined a handler with the following enablement condition :
<enabledWhen>
<and>
[B]<count value="1"/>[/B]
<iterate operator="and">
<test property="org.eclipse.core.resources.projectNature" value="com.anwrt.platform.OperatingPortalNature"/>
<test property="org.eclipse.core.resources.name" value="*.properties"/>
</iterate>
</and>
</enabledWhen>
So my handler is active only when a single *.properties file is selected in the project explorer and that it is contained in a project with a specific nature. Great !
Now, I would like to provide a new way to execute that handler. In a FormEditor, when I am editing the *.properties file, I would like to let the user execute the handler when he clicks on a button for example. So I write the following code when the button is pressed :
// Retrieve the corresponding Services
IHandlerService handlerService = (IHandlerService) getSite().getService(IHandlerService.class);
ICommandService commandService = (ICommandService) getSite().getService(ICommandService.class);
// Retrieve the command
Command generateCmd = commandService.getCommand("my_command_id");
// Create an ExecutionEvent and specify the IFile associated
ExecutionEvent executionEvent = handlerService.createExecutionEvent(generateCmd, new Event());
((IEvaluationContext) executionEvent.getApplicationContext()).addVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME, new StructuredSelection(getInputFile()));
// Launch the command
generateCmd.executeWithChecks(executionEvent);
The problem is that when I try to execute the command, I get the following Exception :
org.eclipse.core.commands.NotEnabledException: Trying to execute the disabled command my_command_id
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:469)
...
While trying to debug the problem, I noticed that in the CountExpression.java class, the call to the method public EvaluationResult evaluate(IEvaluationContext context) throws CoreException seems to indicate that my IEvaluationContext is not correct : the getDefaultVariable() returns an empty Collection ...
So I removed the <count value="1"/> condition from the handler definition, and then it works programmatically, but I can then select two files from the project explorer.
So is there something I missed to specify programmatically that condition or should I proceed in a complete different way ?
Regards,
Jacques
[Updated on: Mon, 26 October 2009 15:30] Report message to a moderator |
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