OK, if i do that i can call event.cancel() wich stops it from changing.

My button that changes the stackpanel to the next stack uses the 
showWidget(int) method and when i call that it triggers the same event 
which is then cancelled. Is there a work around for this? I guess i could 
just put in a switch or something that would detect if it was a header 
click vs a button click?




On Friday, July 27, 2012 1:14:22 PM UTC-7, Rob Whiteside wrote:
>
> Looks like you can register a "BeforeSelectionHandler" then just call 
> cancel on the event.  Looks like that's what it's intended for.
>
> --Rob
>
> On Friday, July 27, 2012 9:13:43 AM UTC-7, Mark Wengranowski wrote:
>>
>> Hi Everyone,
>>
>> I want my stacklayoutpanel to only change stacks when i click on a button 
>> i've created and not when someone clicks on the header. i.e. i only want 
>> the stack to change once my validation has passed.
>>
>> The only way I can see to do this is to copy/paste the 
>> StackLayoutPanel.java code into my own file and remove the handler that 
>> gets added to the header. Then use my custom SLP for my ui. 
>>
>> Does anyone have a better alternative? I'm unable to override the insert 
>> method for stacklayoutpanel
>>
>

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