[news.eclipse.platform.swt] focuslistener and buttons don't mix?

[pkrouse@xxxxxxxxxxxxx (Pierce Krouse)]

I have a dialog that implements the focuslistener interface, and I cannot 
add a focuslistener to a button in the dialog.  The error I get says
"The method AddFocusListener(FocusListener) in the type Control is not 
applicable  for the arguments(NewPatientDialog).

The code is pretty straightforward:
public class NewPatientDialog extends Dialog implements SelectionListener, 
FocusListener {

..
       m_clearFields = new Button(btnComposite, SWT.PUSH);
       m_saveDefaults = new Button(btnComposite, SWT.PUSH);
       m_clearFields.setText(NLSStrings.getString("clearFieldsBtnLabel"));
       
m_saveDefaults.setText(NLSStrings.getString("saveDefaultsBtnLabel"));
       m_clearFields.addSelectionListener(this);
       m_clearFields.addFocusListener(this);      // unhappy here
       m_saveDefaults.addSelectionListener(this);
       m_saveDefaults.addFocusListener(this);     // unhappy here as well

..
}

Any thoughts?

--PK