helloapplet.java

webwork source

/*
 * WebWork, Web Application Framework
 *
 * Distributable under Apache license.
 * See terms of license at opensource.org
 */
package webwork.examples.helloworld.applet;

import webwork.action.client.ActionResult;
import webwork.action.client.ClientDispatcher;
import webwork.examples.helloworld.HelloWorld;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.net.URL;

/**
 * Applet for the HelloWorld example that showcases the use of the ClientDispatcher
 * to access server-side functionality.
 *
 * @author Rickard 謆erg ([e-mail])
 */
public class HelloApplet
   extends Applet
{
   // Attributes ----------------------------------------------------
   ClientDispatcher dispatcher;
   Label responseLabel;
   HelloWorld action = new HelloWorld();

   // Public --------------------------------------------------------
   public void init()
   {
      // Init action dispatcher
      try
      {
         dispatcher = new ClientDispatcher(this, "/webwork");
      } catch (Exception e)
      {
         e.printStackTrace();
      }

      // Init action
      action.setPhrase("Hello");
      action.setName("Worlds");

      // Init UI
      final Container pane = this;
      final CardLayout cardLayout = new CardLayout();
      pane.setLayout(cardLayout);

      // Login
      Container login = new Panel(new BorderLayout());
      pane.add("login", login);
      login.add("Center",new Label("Enter your name:"));
      final TextField nameInput = new TextField();
      login.add("South",nameInput);
      nameInput.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent e)
         {
            try
            {
               action.setName(nameInput.getText());
               nameInput.setText("");

               // Execute action
               getGreeting();
            } catch (Exception ex)
            {
               responseLabel.setText(ex.toString());
               ex.printStackTrace();
            }
            // Switch to response
            cardLayout.show(pane, "response");
            validate();
         }
      });

      // Response pane
      Container response = new Panel(new BorderLayout());
      pane.add("response", response);
      responseLabel = new Label();
      response.add("Center",responseLabel);
      final Button responseOk = new Button("Ok");
      response.add("South",responseOk);
      responseOk.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent e)
         {
            cardLayout.show(pane, "greeting");
            validate();
         }
      });

      // Greeting pane
      Container greeting = new Panel(new BorderLayout());
      pane.add("greeting", greeting);
      greeting.add("Center",new Label("Enter greeting phrase:"));
      final TextField greetingInput = new TextField();
      greeting.add("South",greetingInput);
      greetingInput.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent e)
         {
            try
            {
               action.setPhrase(greetingInput.getText());
               greetingInput.setText("");

               // Execute action
               getGreeting();
            } catch (Exception ex)
            {
               responseLabel.setText(ex.toString());
               ex.printStackTrace();
            }
            // Switch to response
            cardLayout.show(pane, "response");
            validate();
         }
      });
   }

   // Protected -----------------------------------------------------
   protected void getGreeting()
      throws Exception
   {
      ActionResult result = dispatcher.execute(action);
      action = (HelloWorld)result.getAction();

      responseLabel.setText(action.getGreeting());
   }
}