com.google.gwt.user.client.ui
Class Composite

java.lang.Object
  com.google.gwt.user.client.ui.UIObject
      com.google.gwt.user.client.ui.Widget
          com.google.gwt.user.client.ui.Composite

All Implemented Interfaces:

EventListener

Direct Known Subclasses:

TabBar, TabPanel

public abstract class Composite

extends Widget

A type of widget that can wrap another widget, hiding the wrapped widget's methods. When added to a panel, a composite behaves exactly as if the widget it wraps had been added.

The composite is useful for creating a single widget out of an aggregate of multiple other widgets contained in a single panel.

Example

code

Field Summary

Fields inherited from class java.lang.Object

typeId, typeName

Constructor Summary

Composite()

Method Summary

Element	getElement() This override checks to ensure setWidget(Widget) has been called.
protected void	onAttach() This method is called when a widget is attached to the browser's document.
protected void	onDetach() This method is called when a widget is detached from the browser's document.
protected void	setWidget(Widget widget) Sets the widget to be wrapped by the composite.

Methods inherited from class com.google.gwt.user.client.ui.Widget

getParent, isAttached, onBrowserEvent, onLoad

Methods inherited from class com.google.gwt.user.client.ui.UIObject

addStyleName, getAbsoluteLeft, getAbsoluteTop, getOffsetHeight, getOffsetWidth, getStyleName, isVisible, isVisible, removeStyleName, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setVisible, setVisible, setWidth, sinkEvents, toString, unsinkEvents

Methods inherited from class java.lang.Object

equals, finalize, hashCode

Constructor Detail

Composite

public Composite()

Method Detail

onAttach

protected void onAttach()

Description copied from class: Widget

This method is called when a widget is attached to the browser's document. It must not be overridden, except by Panel. To receive notification when a widget is attached to the document, override the Widget.onLoad() method.

Overrides:

onAttach in class Widget

onDetach

protected void onDetach()

Description copied from class: Widget

This method is called when a widget is detached from the browser's document. It must not be overridden, except by Panel.

Overrides:

onDetach in class Widget

getElement

public Element getElement()

This override checks to ensure setWidget(Widget) has been called.

Overrides:

getElement in class UIObject

Returns:

the object's browser element

setWidget

protected void setWidget(Widget widget)

Sets the widget to be wrapped by the composite. The wrapped widget must be set before calling any Widget methods on this object, or adding it to a panel.

Parameters:

widget - the widget to be wrapped