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Simple custom constraint on a property editor [message #948778]

Thu, 18 October 2012 07:13

Eclipse User

Hello again Smile

Let's say I have a composite with 2 property editors:

<property-editor>dimension</property-editor>
<property-editor>values</property-editor>

Property "dimension" is expected to be entered in the style "2x3" with 2 integers separated by "x"
Property "values" is expected to be something like "12,2,4,2,0,-5" with 6 integers separated by "," while if the dimension is changed to be "1x3" values should be 3 integers.

more generally, I'd like to write Java code that describes the validation of each property editor and the dependency between each other. How can I achieve that?

Thanks for concern Smile

Re: Simple custom constraint on a property editor [message #949118 is a reply to message #948778]

Thu, 18 October 2012 14:03

Eclipse User

To implement a custom constraint, you need to implement ValidationService and attach it to the property using @Service annotation. Take a look at DuplicateContactValidationService in the contacts sample.

- Konstantin

Re: Simple custom constraint on a property editor [message #952079 is a reply to message #949118]

Sun, 21 October 2012 02:13

Eclipse User

Just what I needed Smile

Thnx a lot Smile

Re: Simple custom constraint on a property editor [message #952138 is a reply to message #952079]

Sun, 21 October 2012 03:20

Eclipse User

I just don't really understand what you did in the "init" and "dispose" functions .. could you give a simple illustration?

Re: Simple custom constraint on a property editor [message #953870 is a reply to message #952138]

Mon, 22 October 2012 11:52

Eclipse User

A ValidationService implementation is responsible for informing the system when the state of its validation is likely to have changed. That's done via the broadcast() method that you see being called in the listener. The listener is attached to properties that are involved in the validation computation during init(). In dispose(), the listener is removed.

- Konstantin

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