[Interest] Possible to draw between QWindows

[Thiago Macieira]

On Tuesday, 1 May 2018 08:31:58 PDT Michael Jackson wrote:
> Possibly strange question that I have googled a bit for but I may not be
> using the proper terminology to get the answers that I am looking for.
> 
> I have a QWidget (say a button) in QWindow "A" and I want to perform a drag
> action from that QWidget onto another QWidget in another QWindow "B" (So
> far easy stuff). What I would like to also do while I am dragging is
> continuously draw a nice stylized line from the current location of the
> mouse back to the QWidget where the drag started. Is this even possible? I
> can't seem to figure out if the line would ONLY be drawn inside the
> QWindows and NOT outside? And if that is the case I would assume that I
> then need to rely on "native" code for each platform to perform the
> drawing? If anybody has a working example of this kind of interaction that
> would also be much appreciated.

By definition, you can only draw inside a window.

So if you need to draw, put a window there. Maybe you can make a window that 
has no title bar, no borders and is transparent.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center