Custom events in Tkinter

Question

I am new in Tkinter.
And I want to know is there any way to catch some custom events for widgets,
for example catch on_packed event after widget.pack()

Answer 1

The list of possible event types is far more extensive than the few you typically see used in example, such as Key, Button, Motion, and Mousewheel. Here is a partial list. It appears that packing should generate a Map event.