Using events

[bianchi]

I was not able to use events. How should I do?

I'm trying like below code

[leocharrua]

Hello. I have the same question. Anyone can help?

[leocharrua]

I get it: the problem is with the json encode.
If you set the function like this you are ok:

'formatter' => new JsExpression('function (val) { return "%" + val; }'),