[cforms] struct and class access in flowscript

[Stephane Delort <St...@edag.de>]

Hi,

I have this definition file :

 <fd:widgets>
   <fd:class id="widgetClass">
     <fd:widgets>
       <fd:union id="union" default="" case="type">
        <fd:datatype base="string"/>
        <fd:widgets>
          <fd:struct id="simpleList">
            <fd:widgets>
              <fd:multivaluefield id="list">
               <fd:label>just another List </fd:label>
               <fd:datatype base="string"/>
               <fd:selection-list type="flow-jxpath" list-path="list"
               value-path="value" label-path="label"/>
              </fd:multivaluefield>
            </fd:widgets>
          </fd:struct>
          <fd:struct id="complexList">
            <fd:widgets>
              <fd:multivaluefield id="list">
               <fd:label>just a complex List </fd:label>
               <fd:datatype base="string"/>
               <fd:selection-list type="flow-jxpath" list-path="list"
               value-path="value" label-path="label"/>
              </fd:multivaluefield>
              <fd:repeater id="lists">
               <fd:widgets>
                 <fd:new id="widgetClass"/>
               </fd:widgets>
              </fd:repeater>
            </fd:widgets>
          </fd:struct>
        </fd:widgets>
       </fd:union>
     </fd:widgets>
   </fd:class>

I would like to fill it with values from a bean, in a flowcsript so I did ;

var model = form.getModel();
var p = form.lookupWidget("widgetClass");
var f = p.lookupWidgetWidget("union").getChild("simpleList").lookupWidget
("list"); /* error here because p is null*/
 f.setSelectionList( c, "listId", "label" );

but then I have a "cannot convert nul to a n object" error (p is null)
I took a look at the cocooon API but I really don't know how to deal with
class, union, ans struct in flowscript (or java).

any help greatly appreciated,
Stephane



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Re: [cforms] struct and class access in flowscript

[Tim Larson <ti...@keow.org>]

On Wed, Aug 11, 2004 at 01:32:35PM +0200, Stephane Delort wrote:
<snip/>
> I would like to fill it with values from a bean, in a flowcsript so I did ;
> 
> var model = form.getModel();
> var p = form.lookupWidget("widgetClass");
> var f = p.lookupWidgetWidget("union").getChild("simpleList").lookupWidget
> ("list"); /* error here because p is null*/
>  f.setSelectionList( c, "listId", "label" );
> 
> but then I have a "cannot convert nul to a n object" error (p is null)
> I took a look at the cocooon API but I really don't know how to deal with
> class, union, ans struct in flowscript (or java).
> 
> any help greatly appreciated,
> Stephane

I don't have time to describe all of it right now, but this might
help get you started...

  <fd:widgets>
    <fd:class id="someClass">
      <fd:widgets>
        <fd:field id="myField">
	  <!-- fill in widget details here -->
	</fd:field>
      </fd:widgets>
    </fd:class>
    <fd:struct id="spacer">
      <fd:new id="someClass"/>
    </fd:struct>
  <fd:widgets>

A "fd:class" is not a real widget...it is just a blueprint for
creating widgets.  So you need to put an "fd:new" where you want
to build an instance of the widgets described by this blueprint.

Note in the sample above that I wrapped the "fd:new" with an
"fd:struct"...this is because the "fd:class" and the "fb:new"
must be in different "namespaces" since they use the same id.
You could instead wrap the "fd:new" in a repeater or a union...
anything that would put it in a different namespace.

To access "myField" from flowscript or java, you would use
lookupWidget to reference "spacer.myField"...note that neither
the "fd:class" nor the "fd:new" are referenced.

--Tim Larson

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