SV: Swing question

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#10705

From: Johan Forsberg
Date: Fri, 20 Aug 1999 00:00

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Gemplus Software <gemplus.software@gemplus.com> skrev i
diskussionsgruppsmeddelandet:37BD0D0B.E142C0AF@gemplus.com...
> Hello,
>
> I think that Swing component (JFC) don't use the UI of the OS underlying
> like AWT. Is it true or false ???

True.

> In case of true, why, for example, JFrame is extented from Frame which is
> based on the java.awt package ???

Windows are a special case. Swing can't just draw something window shaped on
top of the Windows backdrop and expect that to work, can it? :-)

Therefore JFrame and JDialog are both heavyweight (they have native peers).
What really seperates them from Frame and Dialog is that they are more
prepared to contain lightweight components.
For instance, JFrame manages the space for a lightweight JMenu and has a
glassPane for lightweight JToolTips and popups.

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From: "Johan Forsberg" <jfo@SPAM_SPAM_EGGS_SPAMstmf.se>
Subject: SV: Swing question
Date: 1999/08/20
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