[CONF] Apache Wicket: Request Focus on a Specific Form Component (page edited)

Tue, 11 Mar 2008 04:05:44 -0700

Page Edited : WICKET : Request Focus on a Specific Form Component

Request Focus on a Specific Form Component has been edited by James Carman (Mar 11, 2008).

(View changes)

Content:
  1. To request focus for a component, we need to use a little _javascript_, we can do so using a behavior: 
    public class FocusOnLoadBehavior extends AbstractBehavior
{
    private Component component;
    
    public void bind( Component component )
    {
        this.component = component;
        component.setOutputMarkupId(true);
    }

    public void renderHead( IHeaderResponse iHeaderResponse )
    {
        super.renderHead(iHeaderResponse);
        iHeaderResponse.renderOnLoadJavascript("document.getElementById('" + component.getMarkupId() + "').focus()");
    }
}
  2. Now, to use that behavior, all we have to do is: 
    public class MyPage extends WebPage
{
  public MyPage()
  {
    Form form = new Form("form");
    TextField field1 = new TextField("field1");
    field1.add(new FocusOnLoadBehavior());
    form.add(field1);
    add(form);
  }
}

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