RELEASE_2_1_13/src/blocks/woody/samples/forms/countryselector_form.xml

<?xml version="1.0"?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!-- form used to illustrate programmatic changing of listbox content via the flow model -->
<wd:form
  xmlns:wd="http://apache.org/cocoon/woody/definition/1.0"
  xmlns:i18n="http://apache.org/cocoon/i18n/2.1">

	<wd:widgets>
	
	  <wd:field id="us-nonus" required="true">
	    <wd:label>Residence:</wd:label>
	    <wd:datatype base="string"/>
	    <wd:selection-list>
	      <wd:item value="">
	        <wd:label>Select where you live</wd:label>
	      </wd:item>
	      <wd:item value="us">
	        <wd:label>In the U.S. of America</wd:label>
	      </wd:item>
	      <wd:item value="non-us">
	        <wd:label>Outside the U.S. of America</wd:label>
	      </wd:item>
	    </wd:selection-list>
	    <wd:on-value-changed>
	      <javascript>
	        java.lang.System.err.println("Residence changed from " + event.oldValue + " to " + event.newValue);
	        var value = event.source.value;
	        var typewidget = event.source.parent.getWidget("country");
	        if (value == "us") {
	          typewidget.setSelectionList(states, "key", "value");
	        }
	        else if (value == "non-us") {
              typewidget.setSelectionList(countries, "key", "value");
            }
            else {
		      // Reset the value (will clear validation error)
		      event.source.setValue(null);
		      // Set an empty selection list
		      typewidget.setSelectionList(new Packages.org.apache.cocoon.woody.datatype.EmptySelectionList("Select a maker first"));
	        }
	        // Always set the type value to null. Note that it will also fire an event on the "type"
	        // widget if it already had a value.
	        typewidget.setValue(null);
	      </javascript>
	    </wd:on-value-changed>
	  </wd:field>
	
	  <wd:field id="country" required="true">
	    <wd:label>State/Country:</wd:label>
	    <wd:datatype base="string"/>
	    <wd:selection-list>
	      <wd:item value="">
	        <wd:label>Select U.S./non-U.S. first</wd:label>
	      </wd:item>
	    </wd:selection-list>
	    <wd:on-value-changed>
	      <javascript>
	        var value = event.source.value;
	        if (value != null) {
	          event.source.parent.getWidget("message").setValue("So you live in  " + value + " ?");
	        } else {
	          // Reset value
	          event.source.value = null;
	        }
	      </javascript>
	    </wd:on-value-changed>
	  </wd:field>
	
	  <wd:output id="message">
	    <wd:datatype base="string"/>
	  </wd:output>

	</wd:widgets>
</wd:form>