I suppose that this could be one of those "is it a feature or is it a
bug" type questions, but it is also a big difference in behaviour
between Linux and Windows.
I've realised that if you create a simple application with an image on a
form and then partially or wholly overlay it with a frame or a even a
radio group then:
- On Linux: the frame and radio group are not transparent and obscure
the image.
- On Windows: the frame and radio group are transparent, have no
background, and the image shows through.
This applies to both IDE and a running program.
In the windows version, I came readily make the frame opaque when the
program runs by simply overriding its Paint method as follows:
procedure TFrame1.Paint;
begin
EraseBackground(Canvas.handle);
inherited Paint;
end;
So the reason for the transparency is also certainly that the frame's
background is not being erased under Windows but is being erased under
Linux.
So bug or feature?
--
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