[ http://issues.apache.org/jira/browse/COCOON-1916?page=all ]
Carsten Ziegeler reassigned COCOON-1916:
----------------------------------------
Assignee: Carsten Ziegeler
> viewData is undefined in event handler when event is triggered outside
> showForm/sendPageAndWait
> -----------------------------------------------------------------------------------------------
>
> Key: COCOON-1916
> URL: http://issues.apache.org/jira/browse/COCOON-1916
> Project: Cocoon
> Issue Type: Bug
> Components: Blocks: Forms
> Affects Versions: 2.1.8, 2.1.9, 2.1.10-dev (current SVN)
> Reporter: Rob Berens
> Assigned To: Carsten Ziegeler
> Priority: Minor
>
> When calling a java script snippet defined in the form description file,
> viewData is passed in the context as long as viewData is available from the
> objectModel and is not null. This makes it difficult to reliably use viewData
> in the snippet. Consider the case where you create a form and then
> dynamically assign some values to some widgets before actually showing the
> form. This results in value-changed events to be fired with viewData
> undefined in the context of the listener. Then using viewData in the snippet
> results in a reference error. If the event is fired from a sendPageAndWait
> context, viewData is neatly passed.
> The problem is how to distinguish this in the event handler. It would be
> better to always pass viewData be it a null value some times. Then a simple
> test viewData == null could be used in the event handler. Note that viewData
> is also null when sendPageAndWait is called with only one parameter.
> This problem occurs on line 69 in
> o.a.c.forms.event.impl.JavaScriptWidgetListener.java.
> Is this a bug or is there some intentional use?
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