org.hippoecm.frontend.extjs

Class ExtWidget

java.lang.Object

org.apache.wicket.behavior.AbstractBehavior

org.wicketstuff.js.ext.ExtObservable

org.hippoecm.frontend.extjs.ExtWidget

All Implemented Interfaces:

Serializable, org.apache.wicket.behavior.IBehavior, org.apache.wicket.behavior.IComponentConfigurationBehavior, org.apache.wicket.IClusterable, org.apache.wicket.markup.html.IHeaderContributor, IPlugin, org.wicketstuff.js.ext.IExtObservable

public abstract class ExtWidget
extends org.wicketstuff.js.ext.ExtObservable
implements IPlugin

An Ext widget an Ext component that is not instantiated when rendered. Instead, we render the configuration properties that should be passed to their Javascript constructor. These configuration properties are automatically registered in the global Hippo.ExtWidgets registry. The registration key is the Ext xtype. It is then possible to instantiate a widget multiple times in Javascript by retrieving its configuration from the registry and passing it to Ext. Since ExtWidgets are also CMS plugins, they can be easily bootstrapped via plugin configuration node in the repository.

Here's a simple example of an Ext widget.

Repository configuration:

 
 
   
     frontend:plugin
   
   
     com.example.MyExtWidget
   
 
 

MyExtWidget.java:

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.hippoecm.frontend.plugin.IPlugin

CLASSNAME

Constructor Summary

Constructors

Constructor and Description
ExtWidget(String xtype, IPluginContext context)

Method Summary

Methods

Modifier and Type	Method and Description
void	buildInstantiationJs(StringBuilder js, String extClass, org.json.JSONObject properties)
String	getXType()
void	start() This method can be implemented by plugins to delay part of the initialization until subclasses have finished their construction.
void	stop() Release references to external resources.

Methods inherited from class org.wicketstuff.js.ext.ExtObservable

add, add, addEventListener, bind, getExtObservables, getJsObjectId, getProperties, isExtRoot, newExtEventBehavior, onRenderExtHead, onRenderProperties, postRenderExtHead, preRenderExtHead, renderHead

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

afterRender, beforeRender, cleanup, detach, detachModel, exception, getStatelessHint, isEnabled, isTemporary, onComponentTag, onConfigure, onException, onRendered, rendered

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtWidget

public ExtWidget(String xtype,
         IPluginContext context)

Method Detail

getXType

public String getXType()

start

public void start()

Description copied from interface: IPlugin

This method can be implemented by plugins to delay part of the initialization until subclasses have finished their construction.

Specified by:

start in interface IPlugin

stop

public void stop()

Description copied from interface: IPlugin

Release references to external resources. It is not necessary to unregister services or trackers; this is handled by the framework.

Specified by:

stop in interface IPlugin

buildInstantiationJs

public void buildInstantiationJs(StringBuilder js,
                        String extClass,
                        org.json.JSONObject properties)

Overrides:

buildInstantiationJs in class org.wicketstuff.js.ext.ExtObservable