pub fn propagate_event<P: IsA<Widget>>(widget: &P, event: &mut Event)
Sends an event to a widget, propagating the event to parent widgets if the event remains unhandled.
Events received by GTK+ from GDK normally begin in
Depending on the type of event, existence of modal dialogs, grabs, etc.,
the event may be propagated; if so, this function is used.
WidgetExt::event() on each widget it
decides to send the event to. So
WidgetExt::event() is the lowest-level
function; it simply emits the
signal::Widget::event and possibly an
event-specific signal on a widget.
propagate_event() is a bit
main_do_event() is the highest level.
All that said, you most likely don’t want to use any of these
functions; synthesizing events is rarely needed. There are almost
certainly better ways to achieve your goals. For example, use
of making up expose events.