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| − | <table border='1' cellpadding='3'>
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| − | <tr>
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| − | <td>[http://www.eclipse.org/corona Eclipse Home]</td>
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| − | <td>[[Corona|Wiki Home]]</td>
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| − | <td>[[Corona Development|Development]]</td>
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| − | <td>[[Corona HowTo|How To...]]</td>
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| − | </tr>
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| − | </table>
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| − | ----
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| − | ==ContextContainer Event Handler via Extension Point==
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| − | ContextContainer events are processed using event handlers. There are two two ways to define an event handler for ContextContainer events: using the ''eventhandler'' extension point and registering an event handler with the ''ContextContainerEventManager''.
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| − | All event handlers extend the abstract class ''AbstractContextContainerEventHandler''. This class enables each event handler to process its events within its own Eclipse ''job'' within a background thread. An optional event filter can be specified to handle only those events of interest.
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| − | The following describes how to create a ContextContainer event handler by using the ''eventhandler'' extension point.
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| − | ===Define the Extension===
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| − | # Create a new sample plug-in project named ''org.eclipse.corona.sample.eventhandler''
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| − | # Update the plug-in's ''plugin.xml'' using the PDE editor
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| − | ## Create a plug-in dependency on ''org.eclipse.corona.container''
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| − | ## Create an extension of the ''org.eclipse.corona.container.eventhandler'' extension point
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| − | ### Create a new ''eventhandler'' from the extension point
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| − | #### Define the event handler's name: ''SampleEventHandler''
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| − | #### Define the event handler's class: ''org.eclipse.corona.sample.eventhandler.SampleEventHandler''
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| − | #### Leave the optional ''filter'' attribute blank
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| − | ## Select the ''class*'' link to create the event handler class using the wizard
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| − | ### Create the ''SampleEventHandler'' class
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| − | #### Ensure that it extends ''AbstractContextContainerEventHandler''
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| − | ## Implement the event handler's required methods
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| − | ### getID() - is used to identify the event handler
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| − | ### eventThread() - is the Eclipse ''job'' thread where the event handling takes place.
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