Transparent Canvas Background?

[Brendan Whelan]

Does anyone have any ideas on how
to make a canvas background transparent?

I am writing a Icon class (extends Canvas)
which will be added to a panel. The problem
is that the Icon overrides the painted panel
with a white rectangle. I want the background
of the Icon to allow the painted panel
behind to show through

any ideas? I've tried copying a section of the
parent canvas, but I can't find a way to
draw it on the Icon canvas.

[M Taylor]

There is no way to make a heavyweight container transparent. You can,
however, use or extend Container instead. Your background should then
be visible.

[Souljah]

look into setOpaque(false). I've used this where I've had a label on top of
which I wanted to put another label, but the smaller label kep falling
behind the larger one. So I put the smaller label on a panel and set the
panel to setOpaque(false) so that it looked like the smaller label was on
top of the larger one whereas in fact it was on top of a large panel.

Brendan Whelan wrote in message ...

[Mr. Tines]

###

On Wed, 24 Mar 1999 21:23:30 -0000, in <zIcK2.1356$kh3...@news.indigo.ie>
"Brendan Whelan" <bhwh...@indigo.ie> wrote.....

> Does anyone have any ideas on how
> to make a canvas background transparent?

you can't make a java.awt.Canvas transparent;
it's an opaque operating system window. Use
java.awt.Component as your base class

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[Brendan Whelan]

Mr. Tines wrote in message <03241999...@windsong.demon.co.uk>...

>###
>
>On Wed, 24 Mar 1999 21:23:30 -0000, in <zIcK2.1356$kh3...@news.indigo.ie>
> "Brendan Whelan" <bhwh...@indigo.ie> wrote.....
>
>> Does anyone have any ideas on how
>> to make a canvas background transparent?
>
>you can't make a java.awt.Canvas transparent;
>it's an opaque operating system window. Use
>java.awt.Component as your base class

That worked!
By using a component class and making sure that
the paint method of both the component and
container panel called the superclass paint
method, the background shows through.

Thanks for the help everyone!

B.