As seen in #737 and #736 there are some classes which are doing things like setting traits in the init method (particularly when before the super() call) or not passing values through. There can be legitimate reasons for doing this (eg. to guarantee that certain traits hold valid values before their trait change notifiers fire), but in some cases these are interfering with the expected behaviour of the classes.
Additional classes that should be investigated include ViewportToolbar and ViewportZoomTool . There are likely to be others.
As seen in #737 and #736 there are some classes which are doing things like setting traits in the init method (particularly when before the
super()call) or not passing values through. There can be legitimate reasons for doing this (eg. to guarantee that certain traits hold valid values before their trait change notifiers fire), but in some cases these are interfering with the expected behaviour of the classes.Additional classes that should be investigated include
ViewportToolbarandViewportZoomTool. There are likely to be others.