How to check values without task?

[alxt]

I want input postcode and FAST check format, that user could not click on "Complete task", until text length equals 5.
In bpmn form i can set only type "long"…

[trademak]

You would have to implement that validation logic yourself.

Best regards,

[alxt]

Is there an example?
Where is the correct place? Listener? Change explorer code?

[jbarrez]

For this use case, you would need a new form type with a custom widget.

See http://www.jorambarrez.be/blog/2013/03/13/creating-a-new-form-property-in-activiti/ for a howto.