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propertyTester for perspective in visibleWhen expression [message #834912]

Mon, 02 April 2012 14:47

Christian Pontesegger

Messages: 250
Registered: July 2009
Location: Graz, Austria

Senior Member

I was playing around with the expression framework as this is a topic I avoided to touch for too long. I tried to find a very simple example. Therefore I added a toolbar with some sample commands. One uses following visibleWhen expression:

            <command
                  commandId="org.eclipse.ui.file.exit"
                  label="Test4"
                  style="push">
               <visibleWhen
                     checkEnabled="false">
                  <with
                        variable="activeWorkbenchWindow">
                     <test
                           property="org.eclipse.ui.workbenchWindow.isPerspectiveOpen">
                     </test>
                  </with>
               </visibleWhen>
            </command>

I thought this will hide the button when no perspective is open. Unfortunately it doesn't. The button remains visible after closing the last open perspective. Am I facing a bug here or am I using the expression in a wrong way?

thanks

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Re: propertyTester for perspective in visibleWhen expression [message #835449 is a reply to message #834912]

Tue, 03 April 2012 08:27

Libor Jelinek

Messages: 143
Registered: January 2012
Location: Prague, Czech Rep.

Senior Member

Hello Christian,
your code looks like valid but try bellow if it helps:

1) Remove checkEnabled="false". I've never used it before and not sure what is true purpose of it.

2) Rewrite condition from test to equals

<with variable="activeWorkbenchWindowActivePerspectiveName">
   <equals value=""/>
      
   <!-- or if you -->
   
   <not>
      <equals value="id.of.your.only.perspective"/>
   </not>
   
</with>

See ISources.ACTIVE_WORKBENCH_WINDOW_ACTIVE_PERSPECTIVE_NAME

3) If everything else failed, turn on tracing options

Hope that helps!

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