No setter for some properties of Arrow or Line after instantiation about vispy HOT 3 CLOSED

I don't know if I'd say "by design". A lot of vispy's visuals were developed out of a necessity for them and the user experience and consistency with other visuals was an after thought. In general Visuals provide a .set_data method to combine all types of "updates" in a single method and the Arrow provides this.

This is due to the complexity of how updating a visualization works where if it was a property like .pos = new_data we could be making position incompatible with the previous properties of the Visual (ex. array of colors), but we also usually want the GUI to be redrawn right away when we do this setting. So in general the availability of property-style setters depends on the needs of the Visual. Hopefully this helps, but .set_data is probably what you need for now.

from vispy.

Gotcha, I missed that in the documentation. I was a little thrown off because some of the other properties like arrow_color have to be modified directly and because other objects like ellipse don't have the method. Very much appreciate the quick response though, thanks for developing this out.

from vispy.

Yeah consistency is a problem in vispy. It could be fixed or cleaned up but it would require more work than the limited maintainer time can handle. It would also likely break backwards compatibility.

from vispy.