I want to do something like this:

//controller.public.js

import BaseController from './controller.js'
var lastValue;
class GridExternalFilteringGridExternalFilteringCtrl extends BaseController { constructor($scope, $injector, stateData) { super($scope, $injector); } // Fired when custom html section is loaded includeContentLoaded() { } // Fired when custom html section loading failed includeContentError(e) { } // Fired when view content is loaded onShow($scope) { console.log('Show'); }
changeHandler(e) { lastValue = e.value;
this.examplefilter ( ).
}

  exampleFilter ( ) {
var filter;
if ( lastValue gt "" ) {
      filter = {
                logic: 'or',
                filters: [
	 { field: 'Name', operator: 'contains', value: lastValue },
   	{ field: 'Address', operator: 'contains', value: lastValue }, 
 	{ field: 'Phone', operator: 'contains', value: lastValue },
 	{ field: 'SalesRep', operator: 'contains', value: lastValue },
	{ field: 'State', operator: 'contains', value: lastValue },
	{ field: 'Country', operator: 'contains', value: lastValue }
             ]
    };
    this.$ds.customerDs.filter(filter);
 } 

...

However, my component is a comboxbox and e.value is always undefined (via console.log)

Is there something intrinsically wrong with this approach? 

I'm assuming e is some sort of event object.

In my real app I do not have a textbox, I have 3 comboboxes.

How do I get the value of a combobox?

Given e, is there a way I can tell which component generated the event?