Enhancement

The approach to widget events is fragmented across existing widgets. Basic form widgets have handlers for all interaction events (mouse, touch, and keyboard), and pass back the dom event object as the argument. Most other widgets only include widget-specific events (e.g. onOpen for Dialog), and pass some part of requested state back as the argument (e.g. year for onYearChange in Calendar).

Widgets could be improved by standardizing event handlers in two ways:

• More logical approach to which events are exposed
• Consistent approach to which arguments are passed to the event handler