org.apache.wicket.ajax

Class AbstractDefaultAjaxBehavior

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.behavior.AbstractAjaxBehavior

org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

All Implemented Interfaces:

Serializable, IBehaviorListener, IComponentAwareEventSink, IRequestListener, IComponentAwareHeaderContributor, IClusterable

Direct Known Subclasses:

AbstractAjaxTimerBehavior, AjaxEventBehavior, AjaxNewWindowNotifyingBehavior

public abstract class AbstractDefaultAjaxBehavior
extends AbstractAjaxBehavior

The base class for Wicket's default AJAX implementation.

Since:

1.2

Author:

Igor Vaynberg (ivaynberg)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static ResourceReference	INDICATOR reference to the default indicator gif file.

Fields inherited from interface org.apache.wicket.behavior.IBehaviorListener

INTERFACE

Constructor Summary

Constructors

Constructor and Description
AbstractDefaultAjaxBehavior()

Method Summary

Methods

Modifier and Type	Method and Description
protected String	findIndicatorId() Finds the markup id of the indicator.
protected AjaxRequestAttributes	getAttributes()
CharSequence	getCallbackFunction(CallbackParameter... extraParameters) Generates a javascript function that can take parameters and performs an AJAX call which includes these parameters.
CharSequence	getCallbackFunctionBody(CallbackParameter... extraParameters) Generates the body the callback function.
CharSequence	getCallbackScript()
protected CharSequence	getCallbackScript(Component component)
protected void	onBind() Subclasses should call super.onBind()
void	onRequest() Called when a request to a behavior is received.
protected void	postprocessConfiguration(JSONObject attributesJson, Component component) Gives a chance to modify the JSON attributesJson that is going to be used as attributes for the Ajax call.
protected CharSequence	renderAjaxAttributes(Component component) { u: 'editable-label?6-1.IBehaviorListener.0-text1-label', // url m: 'POST', // method name.
protected CharSequence	renderAjaxAttributes(Component component, AjaxRequestAttributes attributes)
void	renderHead(Component component, IHeaderResponse response) Render to the web response whatever the component wants to contribute to the head section.
protected abstract void	respond(AjaxRequestTarget target)
protected void	updateAjaxAttributes(AjaxRequestAttributes attributes) Gives a chance to the specializations to modify the attributes.

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

afterRender, bind, getCallbackUrl, getComponent, onComponentRendered, onComponentTag, onComponentTag, onUnbind, unbind

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

beforeRender, canCallListenerInterface, detach, getStatelessHint, isEnabled, isTemporary, onConfigure, onEvent, onException, onRemove

Methods inherited from class java.lang.Object

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

Field Detail

INDICATOR

public static final ResourceReference INDICATOR

reference to the default indicator gif file.

Constructor Detail

AbstractDefaultAjaxBehavior

public AbstractDefaultAjaxBehavior()

Method Detail

onBind

protected void onBind()

Subclasses should call super.onBind()

Overrides:

onBind in class AbstractAjaxBehavior

See Also:

AbstractAjaxBehavior.onBind()

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

See Also:

Behavior.renderHead(Component, org.apache.wicket.markup.head.IHeaderResponse)

getAttributes

protected final AjaxRequestAttributes getAttributes()

Returns:

the Ajax settings for this behavior

Since:

6.0

updateAjaxAttributes

protected void updateAjaxAttributes(AjaxRequestAttributes attributes)

Gives a chance to the specializations to modify the attributes.

Parameters:

attributes -

Since:

6.0

renderAjaxAttributes

protected final CharSequence renderAjaxAttributes(Component component)

                                {
                                        u: 'editable-label?6-1.IBehaviorListener.0-text1-label',  // url
                                        m: 'POST',          // method name. Default: 'GET'
                                        c: 'label7',        // component id (String) or window for page
                                        e: 'click',         // event name
                                        sh: [],             // list of success handlers
                                        fh: [],             // list of failure handlers
                                        pre: [],            // list of preconditions. If empty set default : Wicket.$(settings{c}) !== null
                                        ep: {},             // extra parameters
                                        async: true|false,  // asynchronous XHR or not
                                        ch: 'someName|d',   // AjaxChannel
                                        i: 'indicatorId',   // indicator component id
                                        ad: true,           // allow default
                                }
 

Parameters:

component - the component with that behavior

Returns:

the attributes as string in JSON format

renderAjaxAttributes

protected final CharSequence renderAjaxAttributes(Component component,
                                AjaxRequestAttributes attributes)

Parameters:

component -

attributes -

Returns:

the attributes as string in JSON format

postprocessConfiguration

protected void postprocessConfiguration(JSONObject attributesJson,
                            Component component)
                                 throws JSONException

Gives a chance to modify the JSON attributesJson that is going to be used as attributes for the Ajax call.

Parameters:

attributesJson - the JSON object created by #renderAjaxAttributes()

component - the component with the attached Ajax behavior

Throws:

JSONException - thrown if an error occurs while modifying attributesJson argument

getCallbackScript

public CharSequence getCallbackScript()

Returns:

javascript that will generate an ajax GET request to this behavior with its assigned component

getCallbackScript

protected CharSequence getCallbackScript(Component component)

Parameters:

component - the component to use when generating the attributes

Returns:

script that can be used to execute this Ajax behavior.

getCallbackFunction

public CharSequence getCallbackFunction(CallbackParameter... extraParameters)

Generates a javascript function that can take parameters and performs an AJAX call which includes these parameters. The generated code looks like this:

 function(param1, param2) {
    var attrs = attrsJson;
    var params = {'param1': param1, 'param2': param2};
    attrs.ep = jQuery.extend(attrs.ep, params);
    Wicket.Ajax.ajax(attrs);
 }
 

Parameters:

extraParameters -

Returns:

A function that can be used as a callback function in javascript

getCallbackFunctionBody

public CharSequence getCallbackFunctionBody(CallbackParameter... extraParameters)

Generates the body the callback function. To embed this code directly into a piece of javascript, make sure any context parameters are available as local variables, global variables or within the closure.

Parameters:

extraParameters -

Returns:

The body of the callback function.

findIndicatorId

protected String findIndicatorId()

Finds the markup id of the indicator. The default search order is: component, behavior, component's parent hierarchy.

Returns:

markup id or null if no indicator found

onRequest

public final void onRequest()

Description copied from interface: IBehaviorListener

Called when a request to a behavior is received.

See Also:

IBehaviorListener.onRequest()

respond

protected abstract void respond(AjaxRequestTarget target)

Parameters:

target - The AJAX target