I solved it with passing the index of an item in collection as a direct link parameter which then updates component's parameter. Then the client of this component (usually page) access the object from collection with updated index. Thanks!
-----Original Message----- From: andre...@gmail.com [mailto:andre...@gmail.com] On Behalf Of Andreas Andreou Sent: Wednesday, January 20, 2010 5:51 PM To: Tapestry users Subject: Re: T4.1.6 Troubles with accessing bindings from async listener method When the direct link is triggered, your listener is called. I don't think the source parameter will be bound since there's no page rendering (or rewinding) happening - just the listener method getting called. Anyway, you have a few options here: - Persist the list into the session. - or, just add the item to the direct link (it needs to be serializable or you need to write a custom DataSqueezer for it) using: <binding name="parameters" value="ognl:value" /> For further reading: - http://tapestry.apache.org/tapestry4.1/quickstart/directlink.html - http://tapestry.apache.org/tapestry4.1/apidocs/org/apache/tapestry/services/ DataSqueezer.html - http://wiki.apache.org/tapestry/DataSqueezer On Wed, Jan 20, 2010 at 18:20, Marko Mrkus <marko.mr...@bumblehood.com> wrote: > Is it possible that only invariant expression bindings are updated in > listener methods for form submissions and invoking direct service urls? > > -----Original Message----- > From: Marko Mrkus [mailto:marko.mr...@bumblehood.com] > Sent: Wednesday, January 20, 2010 2:55 PM > To: 'Tapestry users' > Subject: T4.1.6 Troubles with accessing bindings from async listener method > > Hi, all! > > > > I have problems with understanding how bindings work in Tapestry when they > are accessed from async listener. > > I'm trying to build a List component which takes parameters source, value > and selectedValue. It renders source and updates value as For component. > > I would like that users can select one row in List component and that some > components on page are updated and that they use this updated selected > object value. > > > > Component specification is: > > > > <component-specification class="org.tapestry.example.ListComponent"> > > <parameter name="source" /> > > <parameter name="value" /> > > <parameter name="selectedValue" /> > > <parameter name="updateComponents" /> > > > > <component id="iterator" type="For"> > > <inherited-binding parameter-name="source" name="source" /> > > <inherited-binding parameter-name="value" name="value" /> > > </component> > > > > <component id="selectLink" type="DirectLink"> > > <binding name="listener" value="listener:changeSelecedObject" /> > > <binding name="parameters" > value="ognl:components.get('iterator').index" /> > > </component> > > > > </component-specification> > > > > Java class: > > > > package org.tapestry.example; > > > > public abstract class ListComponent extends BaseComponents{ > > > > public void changeSelectedObject(IRequestCycle cycle) { > > int indexOfRow = > (Integer)cycle.getListenerParameters[0]; > > Object value = this.getSource().get(indexOfRow); > <----------------- THIS LINE THROWS IndexOutOfBoundsException since > this.getSource() returns empty list. > > > > this.setSelectedValue(value); > > > > for (String compId : this.getUpdateComponents) { > > > cycle.getResponseBuilder().updateComponent(compId); > > } > > } > > > > public abstract void getSource(); // Biding accessor for Source parameter > > public abstract void getUpdateComponents(); //Biding accessor for Update > Components parameter > > public abstract void setSelectedValue(Object objValue); > > } > > > > I wonder why I'm getting empty list in listener method. Parameter source was > bound with list with 2 items in it and I got there empty list. > > > > Any help is appreciated. > > > > Regards, > > Marko > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > -- Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr Tapestry / Tacos developer Open Source / JEE Consulting --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
