Re: "Bouncing" panning canvas

[Damon Chaplin <damonachaplin gmail com>]

On Wed, 2018-12-12 at 21:40 +0100, Jeff wrote:
> On 11/12/2018 16:25, Damon Chaplin wrote:
> > I can reproduce it now. It looks like the motion events are jumping
> > around, possibly because some of them are for a different window.
> >
> > In the canvas code I often do this to filter out unwanted events:
> >   if (event->window != canvas->canvas_window)
> >     return FALSE;
>
> Thanks for the help.
>
> If I output the gdk_window associated with the event, it seems they
> are
> all the same, so I don't think that is the problem.
>
> Reference [1] suggests using a motion-hint-mask and event->is_hint
>
> This also hasn't solved the problem.
>
> Any other suggestions?

I would try rewriting the code to use gdk_device_get_position() and
doing calculations based on the root window coordinates.

Damon