Module org.apache.wicket.core

Package org.apache.wicket

Class ClassAttributeModifier

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.AttributeModifier

org.apache.wicket.behavior.AttributeAppender

org.apache.wicket.ClassAttributeModifier

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IComponentAwareHeaderContributor, IClusterable

public abstract class ClassAttributeModifier
extends AttributeAppender

An AttributeModifier specialized in managing the CSS class attribute

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.AttributeModifier

AttributeModifier.MarkerValue

Field Summary

Fields inherited from class org.apache.wicket.AttributeModifier

VALUELESS_ATTRIBUTE_ADD, VALUELESS_ATTRIBUTE_REMOVE

Constructor Summary

Constructors

Constructor	Description
ClassAttributeModifier()	Constructor.

Method Summary

Modifier and Type	Method	Description
protected Serializable	newValue(String currentValue, String appendValue)	Gets the value that should replace the current attribute value.
protected abstract Set<String>	update(Set<String> oldClasses)	Callback to update the CSS class values for a tag.

Methods inherited from class org.apache.wicket.behavior.AttributeAppender

getSeparator, setSeparator, toString

Methods inherited from class org.apache.wicket.AttributeModifier

append, append, detach, getAttribute, getReplaceModel, onComponentTag, prepend, prepend, remove, replace, replace, replaceAttributeValue

Methods inherited from class org.apache.wicket.behavior.Behavior

afterRender, beforeRender, bind, canCallListener, getStatelessHint, isEnabled, isTemporary, onAttribute, onConfigure, onEvent, onException, onRemove, onTag, renderHead, unbind

Methods inherited from class java.lang.Object

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

Constructor Details

ClassAttributeModifier

public ClassAttributeModifier()

Constructor.

Method Details

newValue

protected Serializable newValue(String currentValue,
 String appendValue)

Description copied from class: AttributeModifier

Gets the value that should replace the current attribute value. This gives users the ultimate means to customize what will be used as the attribute value. For instance, you might decide to append the replacement value to the current instead of just replacing it as is Wicket's default.

Overrides:

newValue in class AttributeAppender

Parameters:

currentValue - The current attribute value. This value might be null!

appendValue - The replacement value. This value might be null!

Returns:

The value that should replace the current attribute value

update

protected abstract Set<String> update(Set<String> oldClasses)

Callback to update the CSS class values for a tag.

Parameters:

oldClasses - A set with the old class values

Returns:

A set with the new class values