Re: Transparent Overlay

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Dec 12 1997 - 17:33:05 MET


Scott Sampson wrote:

> Hi,
>
> I want to do something sort of peculiar: I want to have a number of plots
> (each with its own axes etc...)  overlap partially. I want to
> be able to see the underlying points, axes labels, etc... from each
> plot. i.e. the background of the plots should be "transparent". Is there a
> way to do this in root? I tried drawing multiple frames in a single pad,
> but the old frame is deleted or, with the "SAME" option, I get both plots
> in the same frame. Can I get two frames (one offset from the other) to
> overlap transparently, each with its own points,axes etc...?
>
>

Currently this is not possible, but we intend to support this feature.The
graphics output on the screen is not a problem, but graphics input
is non-trivial.
The correct way to implement this functionality will be to support
transparent pads (pad->SetFillStyle(0)).   Currently transparent pads
do not behave correctly.

Rene Brun



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