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? Regards Jeff [1] https://www.linuxtopia.org/online_books/gui_toolkit_guides/gtk+_gnome_application_development/sec-gdkevent_5.html
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