Just a note on design:
Composite is a minimalist Facade, a front to hide the implementation
details of a new component. initWidget() could be passed a Button just
as well as a complicated Panel hierarchy, it doesn't have to have a
collection of Widget children. As a facade, you should never expose
the internal structure as public....i.e. vPanel2, instead implement
HasWidgets and proxy all methods to vPanel2... your Composite would
implement add(Widget) as:
public void add(Widget w)
{
this.vPanel2.add(w);
}
... // the same for the rest of the HasWidgets interface...
So, again, Composite is made to HIDE it's contents implementation. If
you want your component to act like a Panel, subclass one of the many
Panel
types instead.
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