adding checkbox to tomahawk treetable

[Michael Südkamp]

Hi,

I have the following question. I'm modifying the treetable example from the
tomahawk samples. For a columns you would find blocks like this.

          <h:column>
              <f:facet name="header">
                      <h:outputText value="Description" />
              </f:facet>
          <h:outputText value="#{treeItem.description}" />
          </h:column>

Now I would like to display a checkbox rather then a static text. So I
modified this to

        <h:column>
            <f:facet name="header">
                    <h:outputText value="" />
            </f:facet>
          <h:selectBooleanCheckbox value="#{treeItem.selected}"
styleClass="checkbox"/>
        </h:column>

This displays fine. But there's a problem with the name attribute of the
checkboxes. They all have the same name, e.g. "f:_id5" and this leads
obviously to confusion when submitting the form.

My questions are

1. why does JSF not apply different name attributes automatically?

2. I tried to set the IDs manually by

        <h:column>
            <f:facet name="header">
                    <h:outputText value="" />
            </f:facet>
          <h:selectBooleanCheckbox id="cb#{treeItem.id}"
value="#{treeItem.selected}" styleClass="checkbox"/>
        </h:column>

But it seems that you cannot set ID attributes by expression language. I
always get errors like "# is not allowed character"

Can you help?

Michael