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How to prevent SetPropertyValueCommand from being pushed to CommandStack [message #1042986]

Wed, 17 April 2013 05:56

Yoshinori Sugawara

Messages: 1
Registered: April 2013

Junior Member

Hi.

I am creating a graphical editor with GEF and using IPropertySource to edit model via Property Sheet.

Now I am having a problem.

When I want to reject an invalid value typed in Property Sheet, I do nothing in IPropertySource#setPropertyValue().
In this case SetPropertyValueCommand doesn't change property but will be pushed to CommandStack.

Can anyone tell me how to reject the input value without pushing SetPropertyValueCommand to CommandStack?

Regards,
Yoshinori

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Re: How to prevent SetPropertyValueCommand from being pushed to CommandStack [message #1052908 is a reply to message #1042986]

Wed, 01 May 2013 09:22

Maarten Bezemer

Messages: 117
Registered: February 2012

Senior Member

Hi,

The Command class (which, I suppose, is used by your SetPropertyValueCommand class) has the canExecute() method.

Override this method and return false if the command cannot get executed, depending on your conditions. This will prevent the execution of the command and thus prevents it appearing on the CommandStack.

Cheers,
Maarten

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