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ScrollBar dispose [message #436251]

Thu, 13 May 2004 20:35

Charlie Surface

Messages: 40
Registered: July 2009

Member

Why does the Win32 implementation of ScrollBar.dispose() actually do
something? Since ScrollBars can only be created by a Scrollable instance
(in getHorizontalBar() and getVerticalBar()), it seems logical that only the
same Scrollable could dispose them. But this is not the case. Calling
ScrollBar.dispose() actually nulls out the reference in the owning
Scrollable, in addition to hiding the native widget. While it is true that
the native widget is not actually disposed, the behavior still seems
troublesome. Is it intentional?

thanks,
Charlie

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Re: ScrollBar dispose [message #436296 is a reply to message #436251]

Fri, 14 May 2004 19:53

Steve Northover

Messages: 1636
Registered: July 2009

Senior Member

Basically, you shouldn't be calling this. The native widget will be
disposed on platforms where there actually is a native widget there (ie not
Windows).

"Charlie Surface" <newsgroup_replies_only_please@nowhere.com> wrote in
message news:c80lq1$ns4$1@eclipse.org...
> Why does the Win32 implementation of ScrollBar.dispose() actually do
> something? Since ScrollBars can only be created by a Scrollable instance
> (in getHorizontalBar() and getVerticalBar()), it seems logical that only
the
> same Scrollable could dispose them. But this is not the case. Calling
> ScrollBar.dispose() actually nulls out the reference in the owning
> Scrollable, in addition to hiding the native widget. While it is true
that
> the native widget is not actually disposed, the behavior still seems
> troublesome. Is it intentional?
>
> thanks,
> Charlie
>
>

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