when_mouse_leaves does not seem to be detected correctly

[baettigp]

when_mouse_leaves does not seem to be detected correctly

[baettigp]

The "when_mouse_leaves" seems to not trigger perfectly for all widgets, so I found a (temporary?) workaround, but would still be interested in a permanent solution(or know how I could do better):

#setting up defines
def highlight(e):
    for j in range(0,8):
        if globals()["waffle%s" %j] != e.widget:
            globals()["waffle%s" %j].enabled = False
            globals()["waffle%s" %j].bg = "lightgrey"
    e.widget.bg="yellow"
    e.widget.enabled =True

def nohighlight(e):
    e.widget.bg="lightgrey"
    e.widget.enabled =False

which sets all the squares other than the newest highlighted one to disabled and applies the color light gray. So far I haven't seen it glitching.

[martinohanlon]

We could investigate why this is happening. My gut feel says that it is probably due to events being missed as the callback is still being run. I suspect tkinter doesnt fire any events if it is busy! If this is the case there probably isnt a great deal that can be done but it would be good to know / be able to give advice in the documentation.

[lawsie]

I'm investigating this. I've reproduced what @baettigp said above. It appears that two events are triggered when the mouse enters, but only one event is triggered when it leaves, which looks a bit suspicious. Run out of time now but will continue investigations.

[lawsie]

I think/hope I've solved this. The issue wasn't that when_mouse_leaves wasn't detected correctly, I think it was that two mouse enter events were being generated for each time you moused over the waffle, because when the bg colour was changed it previously destroyed and recreated the internal canvas. Have changed it to clear instead of destroy the canvas. However it's not clear whether this will have performance implications elsewhere?

[martinohanlon]

I have merged this change in dev

[martinohanlon]

Released in v1.4.0