Re: running example

[Erik Hatcher]

On Mar 31, 2005, at 4:50 PM, Ron Piterman wrote:
××××× Alex Kravets:
thanks Geoff,
So the example was wrong then? And as I understand when I define a 
binding with name listener it will always be put into map by 
Tapestry?

note that it is not "listeners:okListener" but "listeners.okListener".
That is true in 3.0...
However note that in 3.1 in addition to "ognl:listeners.okListener" 
that "listener:okListener" is also acceptable.

        Erik

Ognl calls getListeners(), gets a custom map implementation, which, 
when
get(key) is called, constructs a listener which will call your, in 
this case, okListener method. (or so I understand it) - this saves you 
much time in implementing real listener implementations.

You can define your own listener implementation though and supply it 
in the binding.


Geoff Longman wrote:
and the java to:
public class Home extends BasePage {
  public void okListener(IrequestCycle cycle) {
cycle.activate("Result");
}
}
 IActionListeners are create for you by Tapestry and hooked to the
methods with sigs as above. These synthetic listeners are stored in a
map called "listeners" hence the ognl expression
"listeners.okListener".
Geoff
On Thu, 31 Mar 2005 14:51:57 -0600, Geoff Longman 
<[EMAIL PROTECTED]> wrote:

change:
<binding name="listener" expression="okListener"/>
to:
<binding name="listener" expression="listeners.okListener"/>
Geoff
On Thu, 31 Mar 2005 15:21:05 -0500, Alex Kravets
<[EMAIL PROTECTED] > wrote:
I am experimenting with currency converter from this tutorial:
http://www2.cpttm.org.mo/cyberlab/softdev/tapestry/ .
When I run application I get an exception:
org.apache.tapestry.BindingException
Unable to resolve expression 'okListener' for
[EMAIL PROTECTED]
binding:        ExpressionBinding[Home okListener]
location:       context:/WEB-INF/Home.page, line 10, column 56
ognl.NoSuchPropertyException
okListener
I have all the files as in tutorial, but have no idea what's going 
on.
Obviously it can't link Home.page with Home.java, but why?

Home.page
========
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE page-specification
     PUBLIC "-//Apache Software Foundation//Tapestry Specification 
3.0//EN"
     "http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd " >
<!-- generated by Spindle, http://spindle.sourceforge.net -->

<page-specification class="helloworld.Home">
   <description><![CDATA[   add a description   ]]></description>
       <component id="currencyConverterForm" type="Form">
                  <binding name="listener" 
expression="okListener"/>
       </component>
</page-specification>

Home.java
========
package helloworld;
import org.apache.tapestry.*;
import org.apache.tapestry.html.*;
public class Home extends BasePage {
       public IActionListener getOkListener() {
               return new IActionListener() {
                       public void actionTriggered( IComponent
component, IRequestCycle cycle) {
                               cycle.activate("Result");
                       }
               };
       }
}
thanks,
Alex


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