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Home » Newcomers » Newcomers » Dynamic updating of Enable/Disabled UI Element
Dynamic updating of Enable/Disabled UI Element [message #719517] Sat, 27 August 2011 11:15 Go to next message
Eclipse User
Originally posted by: rkwright

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<p class="p1">I implemented some menu/toolbar items via commands and menu contributions.<span class="Apple-converted-space">  </span>The commands were implemented via AbstractHandler.<span class="Apple-converted-space">  </span>All works as expected EXCEPT that I can't seem to dynamically update the "enabled" status.<span class="Apple-converted-space">  </span>I have defined both enabled and disabled icons.<span class="Apple-converted-space">  </span>I have also implemented the isHandled and isEnabled.<span class="Apple-converted-space">  </span>isHandled always returns true, but isEnabled returns a boolean based on the state of my model.</p>
<p class="p2"><br></p>
<p class="p1">When the command is executed, I call<span class="Apple-converted-space"> </span></p>
<p class="p2"><br></p>
<p class="p3"><span class="Apple-tab-span"> </span>ICommandService service = (ICommandService) PlatformUI.<i>getWorkbench</i>().getService(ICommandService.<span class="s1"><b>class</b></span>);</p>
<p class="p4"><span class="s2"><span class="Apple-tab-span"> </span>service.refreshElements(</span>"com.geofx.gms.commands.StartSim"<span class="s2">, </span><span class="s1"><b>null</b></span><span class="s2">);</span></p>
<p class="p5"><br></p>
<p class="p6">which triggers the call to updateElement.</p>
<p class="p5"><br></p>
<p class="p6">The odd thing is that no matter whether I return true or false from isEnabled(), the menu/toolbar item remains enabled.<span class="Apple-converted-space">  </span>If I explicitly set the return from isEnabled to false (initially), then the item is never enabled (i.e. the right icon is show and the handler is not called - as expected).</p>
<p class="p5"><br></p>
<p class="p6">Is there some other refresh or call that I am expected to make?<span class="Apple-converted-space">  </span>Am I supposed to something explicit in the body of updateElement?<span class="Apple-converted-space">  </span>If so, what?<span class="Apple-converted-space">  </span>I'll keep poking, but if someone has advice, I would be appreciative.</p>
<p class="p5"><br></p>
<p class="p6">TIA Ric</p>
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Re: Dynamic updating of Enable/Disabled UI Element [message #720047 is a reply to message #719517] Mon, 29 August 2011 14:00 Go to previous message
Eric Rizzo is currently offline Eric Rizzo
Messages: 2227
Registered: July 2009
Senior Member
Not really a "newcomers" question. Try asking in the Platform forum group.


On 8/27/11 11:15 AM, rkwright wrote:
> I implemented some menu/toolbar items via commands and menu
> contributions.The commands were implemented via AbstractHandler.All
> works as expected EXCEPT that I can't seem to dynamically update the
> "enabled" status.I have defined both enabled and disabled icons.I have
> also implemented the isHandled and isEnabled.isHandled always returns
> true, but isEnabled returns a boolean based on the state of my model.
>
>
> When the command is executed, I call
>
>
> ICommandService service = (ICommandService)
> PlatformUI./getWorkbench/().getService(ICommandService.*class*);
>
> service.refreshElements("com.geofx.gms.commands.StartSim", *null*);
>
>
> which triggers the call to updateElement.
>
>
> The odd thing is that no matter whether I return true or false from
> isEnabled(), the menu/toolbar item remains enabled.If I explicitly set
> the return from isEnabled to false (initially), then the item is never
> enabled (i.e. the right icon is show and the handler is not called - as
> expected).
>
>
> Is there some other refresh or call that I am expected to make?Am I
> supposed to something explicit in the body of updateElement?If so,
> what?I'll keep poking, but if someone has advice, I would be appreciative.
>
>
> TIA Ric
>
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