Hi Dan,
Try gtk_widget_add_events() to add your events before the widget is realized.
Then you can set up your drawing area callbacks for your cursor motion.
I have a bit of a lengthy example in C at
https://github.com/cecashon/OrderedSetVelociRaptor/blob/master/Misc/cairo_drawings/bezier_points1.c
If you are working on some graphing there are a few things in there that might
be of added interest. You can move some points around the drawing area and use
a smoothing or approximation function to connect them. There is also some
animation and svg in there as well.
Eric
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