[nautilus/wip/antoniof/gtk4-preparation-step-event-controllers: 28/54] floating-bar: Don't use gdk_window_get_position()

[António Fernandes <antoniof src gnome org>]

commit c4b216b1d39baaafbd111e96bbd3e550eb180a2a
Author: António Fernandes <antoniof gnome org>
Date:   Thu Aug 5 20:16:45 2021 +0100

    floating-bar: Don't use gdk_window_get_position()
    
    It's gone in GTK4.
    
    Instead, translate to parent widget coordinates, which is the
    same coordinate system we get from the event controller.

 src/nautilus-floating-bar.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/nautilus-floating-bar.c b/src/nautilus-floating-bar.c
index 662c808c9..21106eab9 100644
--- a/src/nautilus-floating-bar.c
+++ b/src/nautilus-floating-bar.c
@@ -244,6 +244,7 @@ on_event_controller_motion_enter (GtkEventControllerMotion *controller,
                                   gpointer                  user_data)
 {
     NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (user_data);
+    GtkWidget *parent;
     CheckPointerData *data;
     gint y_pos;
 
@@ -254,7 +255,9 @@ on_event_controller_motion_enter (GtkEventControllerMotion *controller,
         return;
     }
 
-    gdk_window_get_position (gtk_widget_get_window (GTK_WIDGET (self)), NULL, &y_pos);
+    parent = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (controller));
+    gtk_widget_translate_coordinates (GTK_WIDGET (self), parent, 0, 0, NULL, &y_pos);
+
     if (y < y_pos)
     {
         return;