[gtk/popup-shadow-width: 75/78] popover: Handle shadow changes

[Matthias Clasen <matthiasc src gnome org>]

commit 09209c5a56cf9140eed2a1cf6a1318a660fc3566
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Feb 13 19:05:26 2021 -0500

    popover: Handle shadow changes
    
    When the box-shadow css property of the contents
    widget changes, queue a resize on the popover.

 gtk/gtkpopover.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index 217c2f30a2..bf9be24709 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -879,6 +879,15 @@ node_style_changed_cb (GtkCssNode        *node,
     gtk_widget_queue_draw (widget);
 }
 
+static void
+contents_css_changed (GtkGizmo          *contents,
+                      GtkCssStyleChange *change)
+{
+  if (change == NULL ||
+      gtk_css_style_change_changes_property (change, GTK_CSS_PROPERTY_BOX_SHADOW))
+    gtk_widget_queue_resize (gtk_widget_get_parent (GTK_WIDGET (contents)));
+}
+
 static void
 gtk_popover_init (GtkPopover *popover)
 {
@@ -914,6 +923,7 @@ gtk_popover_init (GtkPopover *popover)
   priv->contents_widget = gtk_gizmo_new ("contents", NULL, NULL, NULL, NULL,
                                          (GtkGizmoFocusFunc)gtk_widget_focus_child,
                                          (GtkGizmoGrabFocusFunc)gtk_widget_grab_focus_child);
+  gtk_gizmo_set_css_changed_func (GTK_GIZMO (priv->contents_widget), contents_css_changed);
   gtk_widget_set_layout_manager (priv->contents_widget, gtk_bin_layout_new ());
   gtk_widget_set_parent (priv->contents_widget, GTK_WIDGET (popover));
   gtk_widget_set_overflow (priv->contents_widget, GTK_OVERFLOW_HIDDEN);