I want to customize the kendo.ui.Grid for my application and create a base class kendo.ui.GridEx that inherits from the kendo.ui.Grid class. Everything works fine, except with columns.selectable (true). The check boxes appear, but the click events are not handled. Therefore the selection method does not work either (no rows returned).
Example: https://jsfiddle.net/chstorb/g3n5or69/