[glade] GladeUtils: fix glade_utils_get_pointer()

[Juan Pablo Ugarte <jpu src gnome org>]

commit c84932343f5e7ea20a0d11b42ca2543b703b4919
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Fri Sep 25 16:28:04 2020 -0300

    GladeUtils: fix glade_utils_get_pointer()
    
    Use default pointer device instead of device from current event
    since a paste can be triggered by the keyboard.
    
    This fix issue pasing widget with ctrl+v in GtkGrid

 gladeui/glade-utils.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/gladeui/glade-utils.c b/gladeui/glade-utils.c
index 904e3ebb..6757c594 100644
--- a/gladeui/glade-utils.c
+++ b/gladeui/glade-utils.c
@@ -1165,15 +1165,15 @@ glade_util_search_devhelp (const gchar *book,
 GtkWidget *
 glade_util_get_placeholder_from_pointer (GtkContainer *container)
 {
-  GdkDeviceManager *manager;
   GdkDisplay *display;
   GdkDevice *device;
   GdkWindow *window;
+  GdkSeat *seat;
 
   if (((display = gtk_widget_get_display (GTK_WIDGET (container))) || 
        (display = gdk_display_get_default ())) &&
-      (manager = gdk_display_get_device_manager (display)) &&
-      (device = gdk_device_manager_get_client_pointer (manager)) &&
+      (seat = gdk_display_get_default_seat (display)) &&
+      (device = gdk_seat_get_pointer (seat)) &&
       (window = gdk_device_get_window_at_position (device, NULL, NULL)))
     {
       gpointer widget;
@@ -2069,10 +2069,14 @@ glade_utils_get_pointer (GtkWidget *widget,
 
   if (!device)
     {
-      GdkEvent *event = gtk_get_current_event ();
-
-      device = gdk_event_get_device (event);
-      gdk_event_free (event);
+      GdkDisplay *dsp;
+      GdkSeat *seat;
+
+      if (((dsp = gtk_widget_get_display (widget)) ||
+           (dsp = gdk_display_get_default ())) &&
+          (seat = gdk_display_get_default_seat (dsp)) &&
+          (device = gdk_seat_get_pointer (seat)))
+        window = gdk_device_get_window_at_position (device, NULL, NULL);
     }
 
   g_return_if_fail (GDK_IS_DEVICE (device));