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Another property evaluation question [message #1385321]

Thu, 05 June 2014 15:15

Greg Watson

Messages: 115
Registered: July 2009

Senior Member

I'm using Eclipse 4.4RC3.

I have a toolbar with buttons that I want to enable/disable based on the value of a property. The value of the property can change at arbitrary times, so I'm trying to force it to be re-evaluated. However the buttons are only updated when the selection changes.

The handler is defined as:

<handler
class="org.eclipse.ptp.internal.rm.lml.monitor.ui.handlers.RemoveMonitorHandler"
commandId="org.eclipse.ptp.rm.lml.monitor.ui.removeMonitor">
<enabledWhen>
<with
variable="selection">
<test
property="org.eclipse.ptp.rm.monitor.isActive"
value="false">
</test>
</with>
</enabledWhen>
</handler>

When the property changes, I call IEvaluationService#requestEvaluation("org.eclipse.ptp.rm.monitor.isActive") but the enabled state of the button does not change.

I've tried using the expression:

<enabledWhen>
<test
property="org.eclipse.ptp.rm.monitor.isActive"
value="false">
</test>
</enabledWhen>

but this doesn't make any difference because, I assume, that the default variable is still "selection".

Am I missing something here?

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