From: David Abrahams (dave_at_[hidden])
Date: 2004-03-04 08:59:12
"David Turner" <dkturner_at_[hidden]> writes:
>> Hm...maybe I don't understand why it has to be that way?
> [snip]
>> why can't we say
>>
>> window w;
>> w.add( button( "Click me" ) ); (*)
>>
>
> As I explained in an earlier post to Peter Dimov, there are technical
> reasons why this isn't possible. Widgets have to be rooted in an owning
> window, and it's not possible to transfer widgets from one window to
> another. Therefore, button has to take an owner-window parameter in its
> constructor.
button("click me") doesn't have to be a widget. Think expression
templates. It can just build up a type to be used by window to add a
button.
-- Dave Abrahams Boost Consulting www.boost-consulting.com