Yahoo! UI Library

Event Utility  2.5.1

Yahoo! UI Library > event > YAHOO.util.KeyListener

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Class YAHOO.util.KeyListener

KeyListener is a utility that provides an easy interface for listening for keydown/keyup events fired against DOM elements.

Constructor

YAHOO.util.KeyListener ( attachTo , keyData , handler , event )
Parameters:
attachTo <HTMLElement> The element or element ID to which the key event should be attached
attachTo <String> The element or element ID to which the key event should be attached
keyData <Object> The object literal representing the key(s) to detect. Possible attributes are shift(boolean), alt(boolean), ctrl(boolean) and keys(either an int or an array of ints representing keycodes).
handler <Function> The CustomEvent handler to fire when the key event is detected
handler <Object> An object literal representing the handler.
event <String> Optional. The event (keydown or keyup) to listen for. Defaults automatically to keydown.

Properties

enabled - Boolean

Boolean indicating the enabled/disabled state of the Tooltip

KEY - static final object

keycode constants for a subset of the special keys

YAHOO.util.KeyListener.KEYDOWN - static final String

Constant representing the DOM "keydown" event.

YAHOO.util.KeyListener.KEYUP - static final String

Constant representing the DOM "keyup" event.

Methods

disable

void disable ( )
Disables the KeyListener by removing the DOM event listeners from the target DOM element
Returns: void

enable

void enable ( )
Enables the KeyListener by attaching the DOM event listeners to the target DOM element
Returns: void

handleKeyPress

private void handleKeyPress ( e , obj )
Handles the key event when a key is pressed.
Parameters:
e <DOMEvent> The keypress DOM event
obj <Object> The DOM event scope object
Returns: void

toString

String toString ( )
Returns a String representation of the object.
Returns: String
The string representation of the KeyListener

Events

disabledEvent

disabledEvent ( keyData )
The CustomEvent fired when the KeyListener is disabled via the disable() function
Parameters:
keyData <Object> The object literal representing the key(s) to detect. Possible attributes are shift(boolean), alt(boolean), ctrl(boolean) and keys(either an int or an array of ints representing keycodes).

enabledEvent

enabledEvent ( keyData )
The CustomEvent fired when the KeyListener is enabled via the enable() function
Parameters:
keyData <Object> The object literal representing the key(s) to detect. Possible attributes are shift(boolean), alt(boolean), ctrl(boolean) and keys(either an int or an array of ints representing keycodes).

keyEvent

private keyEvent ( keyData )
The CustomEvent fired internally when a key is pressed
Parameters:
keyData <Object> The object literal representing the key(s) to detect. Possible attributes are shift(boolean), alt(boolean), ctrl(boolean) and keys(either an int or an array of ints representing keycodes).

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