A First Look at the Wicket Framework

The corresponding java code for the class extending wicket.markup.html.WebPage (import and package name excluded):

  
public class WicketTestPage extends WebPage
{
  PizzaForm pizzaForm = new PizzaForm("pizzaForm");

  public WicketTestPage()
  {
    super();
    add(pizzaForm);
  }
}

The wicket.markup.html.form.Form class is meant to be extended, since it provides an onSubmit() method that is executed when the form is submitted. I wrote the PizzaForm class to map the form in the html page, here are the relevant segments of the source for the PizzaForm class:

  
public class PizzaForm extends Form
{
  private DropDownChoice crustDropDown;
  private CheckBox pepperoniCheckBox = new CheckBox("pepperoni");
  private CheckBox sausageCheckBox = new CheckBox("sausage");
  private CheckBox onionsCheckBox = new CheckBox("onions");
  private CheckBox greenPeppersCheckBox = new CheckBox("greenPeppers");
  private TextField commentsTextField = new TextField("comments");

  public PizzaForm(String id)
  {
    super(id);
    PizzaModel pizzaModel = new PizzaModel();
    setModel(new CompoundPropertyModel(pizzaModel));
    crustDropDown = new DropDownChoice(
        "crust",new PropertyModel(pizzaModel, "crust"), Arrays
        .asList(new CrustType[]
                              { new CrustType("Thin & Crispy"), 
                                new CrustType("Hand Tossed"),
                                new CrustType("Pan Pizza") }), 
                                new ChoiceRenderer("text", "id"));

    add(crustDropDown);
    add(pepperoniCheckBox);
    add(sausageCheckBox);
    add(onionsCheckBox);
    add(greenPeppersCheckBox);
    add(commentsTextField);
  }
}

Basically what I did here was to add all of the necessary Wicket components to the form. The code for the DropDown component might look a little confusing right now if you are not familiar with Wicket, don't worry about it for now, it will be explained later.

Finally, I wrote a PizzaModel class to hold the user-entered values on the form:

  
public class PizzaModel implements Serializable
{
  private String crust;
  private boolean pepperoni;
  private boolean sausage;
  private boolean onions;
  private boolean greenPeppers;
  private String comments;
  
  public String getComments()
  {
    return comments;
  }
  public void setComments(String comments)
  {
    this.comments = comments;
  }
  public String getCrust()
  {
    return crust;
  }
  public void setCrust(String crust)
  {
    this.crust = crust;
  }
  public boolean getGreenPeppers()
  {
    return greenPeppers;
  }
  public void setGreenPeppers(boolean greenPeppers)
  {
    this.greenPeppers = greenPeppers;
  }
  public boolean getOnions()
  {
    return onions;
  }
  public void setOnions(boolean onions)
  {
    this.onions = onions;
  }
  public boolean getPepperoni()
  {
    return pepperoni;
  }
  public void setPepperoni(boolean pepperoni)
  {
    this.pepperoni = pepperoni;
  }
  public boolean getSausage()
  {
    return sausage;
  }
  public void setSausage(boolean sausage)
  {
    this.sausage = sausage;
  }  
}

Notice how the field names on the PizzaModel class match the <wicket:id> attributes in the HTML file.

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A First Look at the Wicket Framework var addthis_pub = "heffel";

A First Look at the Wicket Framework