Package org.apache.wicket.extensions.ajax.markup.html

Class AjaxIndicatorAppender

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.extensions.ajax.markup.html.AjaxIndicatorAppender

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IComponentAwareHeaderContributor, IClusterable

public class AjaxIndicatorAppender
extends Behavior

A behavior that adds a span with wicket's default indicator gif to the end of the component's markup. This span can be used as an ajax busy indicator. For an example usage see IndicatingAjaxLink

Instances of this behavior must not be shared between components.

Since:

1.2

Author:

Igor Vaynberg (ivaynberg)

See Also:

• IndicatingAjaxLink
• IAjaxIndicatorAware
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
AjaxIndicatorAppender()	Construct.
AjaxIndicatorAppender(ResourceReference indicator)	Build a new instance specifying a custom busy indicator as ResourceReference.

Method Summary

Modifier and Type	Method	Description
void	afterRender(Component component)	Called when a component that has this behavior coupled was rendered.
final void	bind(Component component)	Bind this handler to the given component.
protected CharSequence	getIndicatorUrl()
String	getMarkupId()	Returns the markup id attribute of the outer most span of this indicator.
protected String	getSpanClass()
void	renderHead(Component component, IHeaderResponse response)	Render to the web response whatever the component wants to contribute to the head section.

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

beforeRender, canCallListener, detach, getStatelessHint, isEnabled, isTemporary, onAttribute, onComponentTag, onConfigure, onEvent, onException, onRemove, onTag, unbind

Methods inherited from class java.lang.Object

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

Constructor Details

AjaxIndicatorAppender

public AjaxIndicatorAppender()

Construct.

AjaxIndicatorAppender

public AjaxIndicatorAppender(ResourceReference indicator)

Build a new instance specifying a custom busy indicator as ResourceReference.

Parameters:

indicator - The ResourceReference to use as busy indicator.

Method Details

renderHead

public void renderHead(Component component,
 IHeaderResponse response)

Description copied from class: Behavior

Render to the web response whatever the component wants to contribute to the head section.

Specified by:

renderHead in interface IComponentAwareHeaderContributor

Overrides:

renderHead in class Behavior

Parameters:

component - component which is contributing to the response. This parameter is here to give the component as the context for component-awares implementing this interface

response - Response object

afterRender

public void afterRender(Component component)

Description copied from class: Behavior

Called when a component that has this behavior coupled was rendered.

Overrides:

afterRender in class Behavior

Parameters:

component - the component that has this behavior coupled

getIndicatorUrl

protected CharSequence getIndicatorUrl()

Returns:

url of the animated indicator image

getSpanClass

protected String getSpanClass()

Returns:

css class name of the generated outer span

getMarkupId

public String getMarkupId()

Returns the markup id attribute of the outer most span of this indicator. This is the id of the span that should be hidden or show to hide or show the indicator.

Returns:

markup id of outer most span

bind

public final void bind(Component component)

Description copied from class: Behavior

Bind this handler to the given component. This method is called by the host component immediately after this behavior is added to it. This method is useful if you need to do initialization based on the component it is attached and you can't wait to do it at render time. Keep in mind that if you decide to keep a reference to the host component, it is not thread safe anymore, and should thus only be used in situations where you do not reuse the behavior for multiple components.

Overrides:

bind in class Behavior

Parameters:

component - the component to bind to