Angular checkbox to filter data

I am showing FreeEvents using checkbox. I am passing the value to the filter as filter:filterFreeEvent . This is working fine.

But I want to avoid passing value in the filter rather I want to use a change event of a checkbox to filter.

Something like

  <input type="checkbox" ng-model="showFreeEvent" ng-change($event)">

This is my JsFiddle example.

Has anyone done something like this?. Any help or suggestion would be appreciated.

Thanks in advance