Step 6

We would like to process actions and events within the applet, but to do so, we must trap them in some location within the hierarchy where we know they will be seen and then direct them to the applet. This can be done in a number of ways, but one economical way is to override the Frame class, trap them there, and then send them to our overriden methods in the applet.

In the code, below, we override the Frame method and use it to instantiate our outerBox object.

MyFrame outerBox = new MyFrame ( this );

// ************************  MyFrame Class ************************

class MyFrame extends Frame  {
  Applet source;

  MyFrame ( Applet a )  {
    super ( );
    source = a;
  }  // end constructor

  public boolean action ( Event event, Object object )  {
    if ( event.target instanceof MenuItem )  {
      return source.action ( event, object );
    }  // end if
    return false;
  }  // end action

  public boolean handleEvent ( Event event )  {
    if ( event.target instanceof Scrollbar )  {
      return source.handleEvent ( event );
    }  // end if
      return super.handleEvent ( event );
  }  // end handleEvent
}  // end MyFrame 

We can now put all of the pieces together, which we do in the next step.