framework
Class Controller

java.lang.Object
  framework.Controller

All Implemented Interfaces:

java.awt.event.ActionListener, java.util.EventListener

Direct Known Subclasses:

FileMenuController, HelpMenuController

public abstract class Controller
extends java.lang.Object
implements java.awt.event.ActionListener

Base class for many controllers.

The controller component receives commands from the GUI and executes them. Programmersneed to seek a balance between a centralized controller and controllers for each use case.

Note: This controller only works for ActionEvent

Example:

   public class MyController extends Controller {

      public MyController(AppWindow aw) {
         super(aw);
                 // etc.
          }

          public void actionPerformed(ActionEvent e) {
             try {
                        String arg = e.getActionCommand();
            if (arg.equals("Command 1")) handleCommand1();
            else if (arg.equals("Command 2")) handleCommand2();
            else if (arg.equals("Coimmand 3")) handleCommand3();
            // etc.
            } catch (Exception x) {
               FrameworkUtils.error("Exception thrown: " + x);
            }
       }
       private void handleCommand1() {
              MyModel m = (MyModel)appWindow.getModel();
              // update m
           }
       private void handleCommand2() { ... }
       private void handleCommand3() { ... }
       // etc.
   }
   

Field Summary

protected AppWindow

appWindow The AppWindow that this controller is attached to.

Constructor Summary

Controller(AppWindow aw)
Initializes appWindow.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.awt.event.ActionListener

actionPerformed

Field Detail

appWindow

protected AppWindow appWindow

The AppWindow that this controller is attached to. From this we can get the model.

Constructor Detail

Controller

public Controller(AppWindow aw)

Initializes appWindow.

Parameters:

aw - the appWindow that creates this controller.