[gnome-clocks] window: Don't call Gtk.Stack.child_set_property()

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit fdcadc0a5214796aa115bf183c4163f77e2ee6d7
Author: Yetizone <andreii lisita gmail com>
Date:   Tue Jan 12 15:52:56 2021 +0200

    window: Don't call Gtk.Stack.child_set_property()
    
    It's currently used to set the "needs-attention" child property for stack's children
    In GTK4 "needs-attention" is a property of Gtk.StackPage
    Every stack child has a Gtk.StackPage object associated with it

 src/window.vala | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/window.vala b/src/window.vala
index 48239eed..7bd9e4f4 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -136,7 +136,8 @@ public class Window : Adw.ApplicationWindow {
         });
 
         stopwatch.notify["state"].connect ((w) => {
-            stack.child_set_property (stopwatch, "needs-attention", stopwatch.state == 
Stopwatch.Face.State.RUNNING);
+            var stopwatch_stack_page = stack.get_page (stopwatch);
+            stopwatch_stack_page.needs_attention = (stopwatch.state == Stopwatch.Face.State.RUNNING);
         });
 
         timer.ring.connect ((w) => {
@@ -146,7 +147,8 @@ public class Window : Adw.ApplicationWindow {
 
 
         timer.notify["is-running"].connect ((w) => {
-            stack.child_set_property (timer, "needs-attention", timer.is_running);
+            var timer_stack_page = stack.get_page (timer);
+            timer_stack_page.needs_attention = timer.is_running;
         });
 
         Gtk.StyleContext style = get_style_context ();