OnChangeAjaxBehavior (Wicket Parent 9.18.0-SNAPSHOT API)

java.lang.Object
- org.apache.wicket.behavior.Behavior
- - org.apache.wicket.behavior.AbstractAjaxBehavior
  - - org.apache.wicket.ajax.AbstractDefaultAjaxBehavior
    - - org.apache.wicket.ajax.AjaxEventBehavior
      - org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior
        
        org.apache.wicket.ajax.form.OnChangeAjaxBehavior

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IRequestListener, IComponentAwareHeaderContributor, IClusterable

Direct Known Subclasses:

FilesSelectedBehavior
```
public abstract class OnChangeAjaxBehavior
extends AjaxFormComponentUpdatingBehavior
```
A behavior that updates the hosting FormComponent's model via Ajax when value of the component is changed.
For TextField and TextArea form components this behavior uses JavaScript input and change events, for other form component types only JavaScript change event is used.
Note: JavaScript change event is being fired by the browser also when the HTML form element losses the focus, i.e. an Ajax call will be made even if there is no actual change of the form element's value!

Since:

1.3

Author:

Janne Hietamäki (janne)

See Also:

AjaxFormComponentUpdatingBehavior.onUpdate(org.apache.wicket.ajax.AjaxRequestTarget), AjaxFormComponentUpdatingBehavior.onError(org.apache.wicket.ajax.AjaxRequestTarget, RuntimeException), Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`EVENT_CHANGE`	the change event
`static String`	`EVENT_NAME`	'input' and 'change' used as a fallback for all other form component types.

Fields inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior
INDICATOR

Constructor Summary

Constructors
Constructor Description

OnChangeAjaxBehavior()
Constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static OnChangeAjaxBehavior`	`onChange(org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onChange)`	Creates an `OnChangeAjaxBehavior` based on lambda expressions
`protected void`	`updateAjaxAttributes(AjaxRequestAttributes attributes)`	Gives a chance to the specializations to modify the attributes.

Methods inherited from class org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior
checkComponent, disableFocusOnBlur, getFormComponent, getUpdateModel, onBind, onError, onEvent, onUpdate, onUpdate

Methods inherited from class org.apache.wicket.ajax.AjaxEventBehavior
getEvent, onEvent, renderHead, respond

Methods inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior
findIndicatorId, getAttributes, getCallbackFunction, getCallbackFunctionBody, getCallbackScript, getCallbackScript, onMethodMismatch, onRequest, postprocessConfiguration, renderAjaxAttributes, renderAjaxAttributes

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

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.IRequestListener
rendersPage

- Field Detail
  - EVENT_NAME
```
public static final String EVENT_NAME
```
    'input' and 'change' used as a fallback for all other form component types.
    
    See Also:
    
    Constant Field Values
  - EVENT_CHANGE
```
public static final String EVENT_CHANGE
```
    the change event
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - OnChangeAjaxBehavior
```
public OnChangeAjaxBehavior()
```
    Constructor.
- Method Detail
  - updateAjaxAttributes
```
protected void updateAjaxAttributes(AjaxRequestAttributes attributes)
```
    Description copied from class: AbstractDefaultAjaxBehavior
    
    Gives a chance to the specializations to modify the attributes.
    
    Overrides:
    
    updateAjaxAttributes in class AjaxFormComponentUpdatingBehavior
  - onChange
```
public static OnChangeAjaxBehavior onChange(org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onChange)
```
    Creates an OnChangeAjaxBehavior based on lambda expressions
    
    Parameters:
    
    onChange - the SerializableConsumer which accepts the AjaxRequestTarget
    
    Returns:
    
    the OnChangeAjaxBehavior