<?xml version="1.0"?>
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<page xmlns:ft="http://apache.org/cocoon/forms/1.0#template" xmlns:fi="http://apache.org/cocoon/forms/1.0#instance"  xmlns:jx="http://apache.org/cocoon/templates/jx/1.0">
   <!-- Import the macros that define CForms template elements -->
   <jx:import uri="resource://org/apache/cocoon/forms/generation/jx-macros.xml"/>
  <h4 class="samplesGroup">AJAX sample</h4>
  <title>Car selector</title>
  <para>This example illustrates:
     <ul>
        <li>how you can programmatically update the content of a selection list,</li>
        <li>the AJAX features that allow partial page reloads and the associated visual effects.</li>
     </ul>
  </para>
  <para>
    Event-handlers are defined in the form definition to update the selection lists and set
    the comment text below the table. This requires only a few lines of server-side JavaScript.
    Selection widgets also have a "submit-on-change" attribute set in the form template so that
    changes are considered immediately by the server.
  </para>
  <para>
    See "carselector_form.xml" and "carselector_template.xml" to see how this is done.
  </para>
  <content>
    <script type="text/javascript">
       // avoid doing this before everything is loaded
       dojo.addOnLoad(function(){cocoon.ajax.BUHandler.highlight = cocoon.ajax.effects.highlight.blue});
       var currentEffect = "blue";
       function setEffect(effect) {
           if (effect == "none") {
               cocoon.ajax.BUHandler.highlight = null;
           } else if (effect == "blink") {
               cocoon.ajax.BUHandler.highlight = cocoon.ajax.effects.blink;
           } else if (cocoon.ajax.effects.highlight[effect]) {
               cocoon.ajax.BUHandler.highlight = cocoon.ajax.effects.highlight[effect];
           }
           
           document.getElementById(currentEffect).style.fontWeight = "";
           document.getElementById(effect).style.fontWeight = "bold";
           currentEffect = effect;
           return false;
       }
    </script>
    <para>
      Page update effect:
      <a id="none" href="#" onclick="return setEffect('none')">None</a> - 
      <a id="yellow" href="#" onclick="return setEffect('yellow')">Yellow</a> - 
      <a id="blue" href="#" onclick="return setEffect('blue')" style="font-weight: bold">Blue</a> - 
      <a id="red" href="#" onclick="return setEffect('red')">Red</a> - 
      <a id="green" href="#" onclick="return setEffect('green')">Green</a> - 
      <a id="orange" href="#" onclick="return setEffect('orange')">Orange</a> - 
      <a id="purple" href="#" onclick="return setEffect('purple')">Purple</a> - 
      <a id="grey" href="#" onclick="return setEffect('grey')">Grey</a> - 
      <a id="blink" href="#" onclick="return setEffect('blink')">Blink</a>
    </para>
      
    <ft:form-template action="continue" method="POST" ajax="true">
      <ft:continuation-id/>
      <fi:group>
        <fi:styling layout="columns"/>
        <fi:items>
          <ft:widget id="make"/>
          <ft:widget id="type"/>
          <ft:widget id="model"/>
          <ft:widget id="message"/>
          <ft:widget id="buy"/>
        </fi:items>
      </fi:group>
    </ft:form-template>
    <p>
      <a href="./">Back to Forms samples</a>
    </p>
  </content>
</page>
