[news.eclipse.platform.swt] Re: Label background

[Ketan Padegaonkar <KetanPadegaonkar@xxxxxxxxx>]

Grant Gayed wrote:
> Hi,
>
> True transparency like this is not supported, setBackgroundMode() will only
> inheirit a paren't background based on its colour or its background image.
> I think the only way to fake it is to draw the parent's content to an image
> and set it as the background image, as demonstrated below.  The provided
> snippet is very simple though, and the Shell does not have style
> SWT.NO_BACKGROUND, so using this approach may or may not be realistic in
> your context, depending on how frequently the parent's drawn content
> changes.

There's in fact an open bug about this: 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=217092.

The solution that you speak of does not work for e.g. when the 
background is a gradient, and the background is not a flat color, but 
varies depending on where the control is placed on the background, or 
the background gets resized.

Cheers,
Ketan Padegaonkar
http://swtbot.org/ - a functional testing tool for SWT/Eclipse