Class zwt.event.WheelEventManager

A wheel event manager is used by a widget to process wheel events and dispatch them to the appropriate handlers.

Handlers are methods previously registered on the event manager to handle a specific type of event. A typical handler method has two input parameters: the object that triggered the event and the event. An optional object argument may also be passed to the handler if it was provided when dispatching the event to the event manager (see zwt.event.EventManager#onEvent).

Wheel events are catch by the zwt.ui.Window and dispatch to the widget when it has the focus. Therefore method zwt.event.UIEventManager#registerElement does nothing and should never be used.

Defined in: WheelEventManager.js.

Class Summary
Constructor Attributes	Constructor Name and Description
	zwt.event.WheelEventManager(zwt_ui_Widget_widget) Construct a wheel event manager and attach it to the specified widget.

Method Summary
Method Attributes	Method Name and Description
	addWheelHandler(function_handler) Add a wheel handler.
	removeWheelHandler(function_handler) Remove a wheel handler.

Methods borrowed from class zwt.event.UIEventManager:: finalizeEventHandling, registerElement
Methods borrowed from class zwt.event.EventManager:: addHandler, addHandlers, onEvent, removeHandler, removeHandlers

Class Detail

zwt.event.WheelEventManager(zwt_ui_Widget_widget)

Construct a wheel event manager and attach it to the specified widget.
Author: Jeremy KUHN.

Parameters:
{zwt.ui.Widget} zwt_ui_Widget_widget: The widget to monitor

See:: zwt.event.WheelEvent; zwt.event.WindowWheelEventManager

Method Detail

addWheelHandler(function_handler)

Add a wheel handler.

Parameters:
{Function} function_handler: The handler to add

removeWheelHandler(function_handler)

Remove a wheel handler.

Parameters:
{Function} function_handler: The handler to remove

Classes

Class zwt.event.WheelEventManager