com.sencha.gxt.widget.core.client
Class ComponentHelper

java.lang.Object
  com.sencha.gxt.widget.core.client.ComponentHelper

public class ComponentHelper
extends java.lang.Object

Provides access to package protected methods of widget and convenience methods for easier widget bookkeeping.

Constructor Summary

ComponentHelper()

Method Summary

static void	doAttach(Widget widget) Attach a widget
static void	doDetach(Widget widget) Detaches a widget
static HandlerManager	ensureHandlers(Widget widget) Returns the handler manager for the specified widget, creating it if necessary.
static java.lang.String	getWidgetId(Widget widget) Retrieves the ID that has been set on a widget's element.
static Widget	getWidgetWithElement(Element element) Find a the nearest widget that contains the given element.
static boolean	hasElement(Widget widget) Determines if the widget has an Element
static <H extends EventHandler> void	removeHandler(Widget widget, GwtEvent.Type<H> type, H handler) Removes a handler from the widget
static void	setParent(Widget parent, Widget child) Sets the child to the parent widget

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ComponentHelper

public ComponentHelper()

Method Detail

getWidgetWithElement

public static Widget getWidgetWithElement(Element element)

Find a the nearest widget that contains the given element.

Parameters:

element - the element to start at

Returns:

the containing element, or null if there is no widget

doAttach

public static void doAttach(Widget widget)

Attach a widget

Parameters:

widget - the widget to attach

doDetach

public static void doDetach(Widget widget)

Detaches a widget

Parameters:

widget - the widget to detach

ensureHandlers

public static HandlerManager ensureHandlers(Widget widget)

Returns the handler manager for the specified widget, creating it if necessary.

Parameters:

widget - the widget

Returns:

the handler manager

getWidgetId

public static java.lang.String getWidgetId(Widget widget)

Retrieves the ID that has been set on a widget's element. If the widget's element does not already have an ID, one will be automatically generated, and that generated ID will be returned.

Parameters:

widget - The widget whose element's ID is to be retrieved. Must not be null.

Returns:

The ID on the widget's element

hasElement

public static boolean hasElement(Widget widget)

Determines if the widget has an Element

Parameters:

widget - the target Element

Returns:

true if has an Element

removeHandler

public static <H extends EventHandler> void removeHandler(Widget widget,
                                                          GwtEvent.Type<H> type,
                                                          H handler)

Removes a handler from the widget

Parameters:

widget - the target widget

type - the type

handler - the handler to remove

setParent

public static void setParent(Widget parent,
                             Widget child)

Sets the child to the parent widget

Parameters:

parent - the parent widget

child - the child widget