diff --git a/libadwaita/src/subclass/swipeable.rs b/libadwaita/src/subclass/swipeable.rs
index 0d7f26f53214f2f01cf1a5219fb7383e0462a17f..bbbefc752b60587c4fcaafb7fe10602816202ceb 100644
--- a/libadwaita/src/subclass/swipeable.rs
+++ b/libadwaita/src/subclass/swipeable.rs
@@ -4,21 +4,13 @@ use glib::Cast;
 use gtk::subclass::prelude::*;
 
 pub trait SwipeableImpl: WidgetImpl {
-    fn cancel_progress(&self) -> f64 {
-        self.parent_cancel_progress()
-    }
+    fn cancel_progress(&self) -> f64;
 
-    fn distance(&self) -> f64 {
-        self.parent_distance()
-    }
+    fn distance(&self) -> f64;
 
-    fn progress(&self) -> f64 {
-        self.parent_progress()
-    }
+    fn progress(&self) -> f64;
 
-    fn snap_points(&self) -> &[f64] {
-        self.parent_snap_points()
-    }
+    fn snap_points(&self) -> Vec<f64>;
 
     fn swipe_area(
         &self,
@@ -30,10 +22,6 @@ pub trait SwipeableImpl: WidgetImpl {
 }
 
 pub trait SwipeableImplExt: ObjectSubclass {
-    fn parent_cancel_progress(&self) -> f64;
-    fn parent_distance(&self) -> f64;
-    fn parent_progress(&self) -> f64;
-    fn parent_snap_points(&self) -> &[f64];
     fn parent_swipe_area(
         &self,
         navigation_direction: NavigationDirection,
@@ -42,87 +30,6 @@ pub trait SwipeableImplExt: ObjectSubclass {
 }
 
 impl<T: SwipeableImpl> SwipeableImplExt for T {
-    fn parent_cancel_progress(&self) -> f64 {
-        unsafe {
-            let type_data = Self::type_data();
-            let parent_iface = type_data.as_ref().parent_interface::<Swipeable>()
-                as *const ffi::AdwSwipeableInterface;
-
-            let func = (*parent_iface)
-                .get_cancel_progress
-                .expect("no parent \"get_cancel_progress\" implementation");
-
-            func(
-                self.instance()
-                    .unsafe_cast_ref::<Swipeable>()
-                    .to_glib_none()
-                    .0,
-            )
-        }
-    }
-
-    fn parent_distance(&self) -> f64 {
-        unsafe {
-            let type_data = Self::type_data();
-            let parent_iface = type_data.as_ref().parent_interface::<Swipeable>()
-                as *const ffi::AdwSwipeableInterface;
-
-            let func = (*parent_iface)
-                .get_distance
-                .expect("no parent \"get_distance\" implementation");
-
-            func(
-                self.instance()
-                    .unsafe_cast_ref::<Swipeable>()
-                    .to_glib_none()
-                    .0,
-            )
-        }
-    }
-
-    fn parent_progress(&self) -> f64 {
-        unsafe {
-            let type_data = Self::type_data();
-            let parent_iface = type_data.as_ref().parent_interface::<Swipeable>()
-                as *const ffi::AdwSwipeableInterface;
-
-            let func = (*parent_iface)
-                .get_progress
-                .expect("no parent \"get_progress\" implementation");
-
-            func(
-                self.instance()
-                    .unsafe_cast_ref::<Swipeable>()
-                    .to_glib_none()
-                    .0,
-            )
-        }
-    }
-
-    fn parent_snap_points(&self) -> &[f64] {
-        unsafe {
-            let type_data = Self::type_data();
-            let parent_iface = type_data.as_ref().parent_interface::<Swipeable>()
-                as *const ffi::AdwSwipeableInterface;
-
-            let func = (*parent_iface)
-                .get_snap_points
-                .expect("no parent \"get_snap_points\" implementation");
-
-            let mut n_points = std::mem::MaybeUninit::uninit();
-
-            let points = func(
-                self.instance()
-                    .unsafe_cast_ref::<Swipeable>()
-                    .to_glib_none()
-                    .0,
-                n_points.as_mut_ptr(),
-            );
-
-            std::slice::from_raw_parts(points, n_points.assume_init() as usize)
-        }
-    }
-
     fn parent_swipe_area(
         &self,
         navigation_direction: NavigationDirection,
@@ -202,7 +109,7 @@ unsafe extern "C" fn swipeable_get_snap_points<T: SwipeableImpl>(
     let points = imp.snap_points();
 
     n_pointsptr.write(points.len() as libc::c_int);
-    ToGlibContainerFromSlice::to_glib_full_from_slice(points)
+    ToGlibContainerFromSlice::to_glib_full_from_slice(points.as_slice())
 }
 
 unsafe extern "C" fn swipeable_get_swipe_area<T: SwipeableImpl>(