1 files changed, 50 insertions, 0 deletions
diff --git a/src/widget/overlay.vala b/src/widget/overlay.vala
new file mode 100644
index 0000000..4833180
--- /dev/null
+++ b/src/widget/overlay.vala
@@ -0,0 +1,50 @@
+namespace Astal {
+public class Overlay : Gtk.Overlay {
+    public bool pass_through { get; set; }
+
+    public Gtk.Widget overlay {
+        get { return overlays.nth_data(0); }
+        set {
+            foreach (var ch in get_children())
+                remove(ch);
+
+            add_overlay(value);
+        }
+    }
+
+    public List<weak Gtk.Widget> overlays {
+        owned get { return get_children(); }
+        set {
+            foreach (var ch in get_children())
+                remove(ch);
+
+            foreach (var ch in value)
+                add_overlay(ch);
+        }
+    }
+
+    public void set_child(Gtk.Widget widget) {
+        var ch = get_child();
+        if (ch != null) {
+            remove(ch);
+        }
+        add(widget);
+    }
+
+    construct {
+        notify["pass-through"].connect(() => {
+            update_pass_through();
+        });
+    }
+
+    private void update_pass_through() {
+        foreach (var child in get_children())
+            set_overlay_pass_through(child, pass_through);
+    }
+
+    public new void add_overlay(Gtk.Widget widget) {
+        base.add_overlay(widget);
+        set_overlay_pass_through(widget, pass_through);
+    }
+}
+}