When a named font is used by a widget:
% font create Custom -size 8
% label .l -font Custom
and the font is reconfigured:
% font configure Custom -size 17
all core widgets automatically change their size.
If a megawidget uses a named font and does some position calculations on the font size,
there is no way to get notified if the font size change to trigger a size change.
In consequence, widgets look corrupted after a font size change.
Example megawidgets are: NoteBook from BWidgets, TableList
The demanded feature is to send an event if the size of the font changes.
bind .l <FontChange> reConfigure
This would be similar to the Configure event.