RELEASE_2_1_13/src/blocks/forms/samples/forms/file_explorer_model.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

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  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.
-->

<!--
  @version $Id$
-->

<fd:form xmlns:fd="http://apache.org/cocoon/forms/1.0#definition">

  <fd:widgets>    
    <fd:tree id="directories" root-visible="true" selection="single">
      <fd:tree-model type="source" src="context://samples/blocks/forms">
        <!-- keep only directories -->
        <fd:fileset>
          <fd:exclude pattern="*"/>
        </fd:fileset>
	  </fd:tree-model>

      <fd:on-selection-changed>
         <fd:javascript>
            if (event.isAddedPath()) {
			   // Change the directory displayed in the file panel
			   var source = event.tree.model.getNode(event.path);
                var filesPanel = event.source.lookupWidget("../files");
			   filesPanel.model.setRootSource(source);
                // Clear the message in the status bar
                event.source.lookupWidget("../messages").value = "";
		    }
		 </fd:javascript>
	  </fd:on-selection-changed>
    </fd:tree>

    <fd:tree id="files" root-visible="false">
	  <fd:tree-model type="source" src="context://samples/blocks/forms"/>
      <fd:on-selection-changed>
        <fd:javascript>
          var files = event.source;
          var model = files.model;
          var messages = event.source.lookupWidget("../messages");
          var count = event.source.selectionCount;
          if (count == 0) {
              messages.setValue("No selection");
          } else if (count == 1) {
              var src = model.getNode(files.selectionPath);
              messages.setValue(src.name + " - " + src.contentLength + " bytes");
          } else {
              messages.setValue(count + " files selected");
          }
        </fd:javascript>
      </fd:on-selection-changed>
    </fd:tree>
    
    <fd:output id="messages">
      <fd:initial-value>No selection</fd:initial-value>
      <fd:datatype base="string"/>
    </fd:output>
  </fd:widgets>

</fd:form>