title: How to get value of textField without pushing submit button
body: <p>I have a form:</p>
  
  <pre><code>private Class TestForm extends Form&lt;TestString&gt;{
  
    public TestForm(TestString testString){
      super("testForm", new CompoundPropertyModel&lt;TestString&gt;(testString));
      final TextField&lt;String&gt; test = new TextField&lt;String&gt;("test"));
      add(test);
      ... //submit button
    }
  </code></pre>
  
  <p>The <code>TestString</code> class contains just one field: <code>test</code>.</p>
  
  <p>Is it possible to get value of string other than by pushing the submit button? With behaviors or something else?</p>
  
  <p>I tried to add <code>AjaxEventBehavior</code> and inside of this behavior called the methods <code>text.getValue()</code> and <code>testString.getTest()</code> but with no success.</p>