propagateEvent

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 [gtk.global.mainDoEvent]. Depending on the type of event, existence of modal dialogs, grabs, etc., the event may be propagated; if so, this function is used.

[gtk.global.propagateEvent] calls [gtk.widget.Widget.event] on each widget it decides to send the event to. So [gtk.widget.Widget.event] is the lowest-level function; it simply emits the #GtkWidget::event and possibly an event-specific signal on a widget. [gtk.global.propagateEvent] is a bit higher-level, and [gtk.global.mainDoEvent] 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 [gdk.window.Window.invalidateRect] or [gtk.widget.Widget.queueDraw] instead of making up expose events.