Package org.apache.wicket.protocol.http

Class AjaxEnclosureListener

java.lang.Object

org.apache.wicket.protocol.http.AjaxEnclosureListener

All Implemented Interfaces:

AjaxRequestTarget.IListener

public class AjaxEnclosureListener
extends Object
implements AjaxRequestTarget.IListener

This listener adds Enclosures to AjaxTarget, where the child controller of the said Enclosure is already added. This is a part of the fix to the problem: "Changing the visibility of a child component in Ajax callback method will not affect the entire enclosure but just the child component itself. This is because only the child component is added to the AjaxRequestTarget" When used with an "Inline" Enclosure, this problem is fixed. Syntax for inline enclosure: <tr wicket:enclosure="controllingChildId"> In this example the tag used is tr, but any other tag could be used as well. The attribute "wicket:enclosure" is mandatory, and is used to recognise an inline enclosure. The value of the attribute, here "controllingChildId" can contain an id for the child (controller) element. If the said value is not given, the first element inside the enclosure will be used as a controller child. If there are no elements inside the enclosure, the parsing will fail.

Author:

Joonas Hamalainen

See Also:

• WebApplication
• InlineEnclosure
• InlineEnclosureHandler

Constructor Summary

Constructors

Constructor	Description
AjaxEnclosureListener()	Construct.

Method Summary

Modifier and Type	Method	Description
static boolean	isControllerOfEnclosure(Component component, Enclosure enclosure)	Check if a given component is the controlling child of a given enclosure
void	onBeforeRespond(Map<String,Component> map, AjaxRequestTarget target)	Try to find Enclosures that have their controllers added already, and add them to the target.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wicket.ajax.AjaxRequestTarget.IListener

onAfterRespond, updateAjaxAttributes

Constructor Details

AjaxEnclosureListener

public AjaxEnclosureListener()

Construct.

Method Details

onBeforeRespond

public void onBeforeRespond(Map<String,Component> map,
 AjaxRequestTarget target)

Try to find Enclosures that have their controllers added already, and add them to the target.

Specified by:

onBeforeRespond in interface AjaxRequestTarget.IListener

Parameters:

map - modifiable map (markupId -> component) of components already added to the target

target - the target itself. Could be used to add components or to append/prepend JavaScript

isControllerOfEnclosure

public static boolean isControllerOfEnclosure(Component component,
 Enclosure enclosure)

Check if a given component is the controlling child of a given enclosure

Parameters:

component -

enclosure -

Returns:

true if the given component is the controlling child of the given InlineEnclosure