Document values of Continue and Break

Users who are used to developing against other bindings might find
useful to have in the documentation to which values each enum maps to.

glib/src/control_flow.rs

@@ -10,9 +10,14 @@ use crate::{prelude::*, translate::*};
 /// `ControlFlow::Continue` keeps the closure assigned, to be rerun when appropriate.
 ///
 /// `ControlFlow::Break` disconnects and drops it.
+///
+/// `Continue` and `Break` map to `G_SOURCE_CONTINUE` (`true`) and
+/// `G_SOURCE_REMOVE` (`false`), respectively.
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum ControlFlow {
+    #[doc(alias = "G_SOURCE_CONTINUE")]
     Continue,
+    #[doc(alias = "G_SOURCE_REMOVE")]
     Break,
 }
 

glib/src/signal.rs

@@ -149,11 +149,16 @@ pub fn signal_has_handler_pending<T: ObjectType>(
 
 // rustdoc-stripper-ignore-next
 /// Whether to invoke the other event handlers.
+///
+/// `Stop` and `Proceed` map to `GDK_EVENT_STOP` (`true`) and
+/// `GDK_EVENT_PROPAGATE` (`false`), respectively.
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Propagation {
     // Stop other handlers from being invoked for the event.
+    #[doc(alias = "GDK_EVENT_STOP")]
     Stop,
     // Propagate the event further.
+    #[doc(alias = "GDK_EVENT_PROPAGATE")]
     Proceed,
 }