scala override methods in child object of class

Question

New to scala and can't seem to find a reference on this situation.

I'm trying to override some methods on scala.swing.TabbedPane.pages: The definition of this class is:

class TabbedPane extends Component with Publisher {
   object pages extends BufferWrapper[Page] {
     def += 
   }
}

I can't figure out the syntax for overriding any method in the internal pages object. Is this possible with scala?

Thanks.

EDIT: To make this question clearer.

class CloseableTabbedPane extends TabbedPane{

}

val pane = new CloseableTabbedPane;
pane.pages += new CloseablePage;

I need to override the method pane.pages += to accept a CloseablePage with an icon.

Answer 1

In the normal case of overriding a method in a class:

scala> class Foo { def foo : String = "Foo" }
defined class Foo

scala> class Bar extends Foo { override def foo : String = "Bar" }
defined class Bar

scala> val b = new Bar
b: Bar = Bar@1d2bb9f

scala> b.foo
res0: String = Bar

However, you've asked as to whether it is possible to override an object:

scala> class FooBar {
 | object prop extends Foo {
 |   def foo2 : String = "foo2"
 | }
 | }
defined class FooBar

scala> val fb = new FooBar
fb: FooBar = FooBar@183d59c

scala> fb.prop.foo
res1: String = Foo

Now for the override:

scala> fb.prop.foo2
res2: String = foo2

scala> class FooBaz extends FooBar {
 | override object prop extends Bar {
 | def foo2 : String = "bar2"
 | }
 | }
<console>:8: error: overriding object prop in class FooBar of type object FooBaz.this.prop;
 object prop cannot be used here - classes and objects cannot be overridden
   override object prop extends Bar {
                   ^

It doesn't really make sense, as how could you ensure that the overridden value also extended Foo?