nextapp.echo2.app
Class Composite

java.lang.Object
  nextapp.echo2.app.Component
      nextapp.echo2.app.Composite

All Implemented Interfaces:

java.io.Serializable, RenderIdSupport

Direct Known Subclasses:

Panel

public abstract class Composite
extends Component

Generic composite component base class. This class is intended to be used as base class for composite components. This component will simply display its content without any modification to its appearance or behavior. This component may have at most one child component.

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/server synchronization peer. If you wish to create a component with a custom client/server synchronization peer, Component itself should be derived instead of this class.

See Also:

Serialized Form

Field Summary

Fields inherited from class nextapp.echo2.app.Component

CHILDREN_CHANGED_PROPERTY, ENABLED_CHANGED_PROPERTY, FOCUS_TRAVERSAL_INDEX_CHANGED_PROPERTY, FOCUS_TRAVERSAL_PARTICIPANT_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

Composite()

Method Summary

boolean

isValidChild(Component child) Allow at most one child component.

Methods inherited from class nextapp.echo2.app.Component

add, add, addPropertyChangeListener, addPropertyChangeListener, dispose, firePropertyChange, getApplicationInstance, getBackground, getComponent, getComponent, getComponentCount, getComponents, getEventListenerList, getFocusTraversalIndex, getFont, getForeground, getId, getIndexedProperty, getLayoutData, getLayoutDirection, getLocale, getParent, getProperty, getRenderId, getRenderIndexedProperty, getRenderIndexedProperty, getRenderLayoutDirection, 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, setBackground, setEnabled, setFocusTraversalIndex, setFocusTraversalParticipant, setFont, setForeground, setId, setIndexedProperty, setLayoutData, setLayoutDirection, setLocale, setProperty, 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()

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.echo2.app.Component)