nextapp.echo.app

Class Composite

java.lang.Object

nextapp.echo.app.Component

nextapp.echo.app.Composite

All Implemented Interfaces:

java.io.Serializable, RenderIdSupport

public abstract class Composite
extends Component

Composite component: a generic composite component abstract base class. This class is intended to be used as base class for composite components. Provides no rendering properties (other than those specified in Component). May contain at most one child component. May not contain a Pane component as a child.

See the Panel component for a default implementation of a single-child container component.

This class provides no benefit if you are providing a custom client-side synchronization/rendering peer. In such cases, Component itself should be derived instead of this class.

See Also:

Serialized Form

Field Summary

Fields inherited from class nextapp.echo.app.Component

CHILD_VISIBLE_CHANGED_PROPERTY, CHILDREN_CHANGED_PROPERTY, ENABLED_CHANGED_PROPERTY, FOCUS_NEXT_ID_CHANGED_PROPERTY, FOCUS_PREVIOUS_ID_CHANGED_PROPERTY, LAYOUT_DIRECTION_CHANGED_PROPERTY, LOCALE_CHANGED_PROPERTY, PROPERTY_BACKGROUND, PROPERTY_FONT, PROPERTY_FOREGROUND, PROPERTY_LAYOUT_DATA, STYLE_CHANGED_PROPERTY, STYLE_NAME_CHANGED_PROPERTY, VISIBLE_CHANGED_PROPERTY

Constructor Summary

Constructors

Constructor and Description
Composite() Default constructor.

Method Summary

Modifier and Type	Method and Description
boolean	isValidChild(Component child) Allow at most one child component.

Methods inherited from class nextapp.echo.app.Component

add, add, addPropertyChangeListener, addPropertyChangeListener, dispose, firePropertyChange, get, getApplicationInstance, getBackground, getComponent, getComponent, getComponentCount, getComponents, getEventListenerList, getFocusNextId, getFocusPreviousId, getFont, getForeground, getId, getIndex, getLastRenderId, getLayoutData, getLayoutDirection, getLocale, getLocalStyle, getParent, getRenderId, getRenderIndexedProperty, getRenderIndexedProperty, getRenderLocale, getRenderProperty, getRenderProperty, getStyle, getStyleName, getVisibleComponent, getVisibleComponentCount, getVisibleComponents, hasEventListenerList, indexOf, init, isAncestorOf, isEnabled, isFocusTraversalParticipant, isRegistered, isRenderEnabled, isRenderVisible, isValidParent, isVisible, processInput, remove, remove, removeAll, removePropertyChangeListener, removePropertyChangeListener, set, setBackground, setComponents, setEnabled, setFocusNextId, setFocusPreviousId, setFocusTraversalParticipant, setFont, setForeground, setId, setIndex, setLayoutData, setLayoutDirection, setLocale, setRenderId, setStyle, setStyleName, setVisible, validate, verifyInput, visibleIndexOf

Methods inherited from class java.lang.Object

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

Constructor Detail

Composite

public Composite()

Default constructor.

Method Detail

isValidChild

public boolean isValidChild(Component child)

Allow at most one child component.

Overrides:

isValidChild in class Component

Parameters:

child - the Component to evaluate as a child

Returns:

true if the Component is a valid child

See Also:

Component.isValidChild(nextapp.echo.app.Component)