[gtk+/wip/matthiasc/gsk-renderer: 5/7] Prevent box gadget content from being drawn twice

[Matthias Clasen <matthiasc src gnome org>]

commit 602b13a8bdc4a331a26c55c9f9f39c03d16b7602
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 6 19:33:47 2016 -0400

    Prevent box gadget content from being drawn twice
    
    Now that we split out box gadget children into separate
    render nodes, we must not draw them onto the box gadgets
    node anymore.

 gtk/gtkboxgadget.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkboxgadget.c b/gtk/gtkboxgadget.c
index 3cc94da..10bc0df 100644
--- a/gtk/gtkboxgadget.c
+++ b/gtk/gtkboxgadget.c
@@ -518,6 +518,12 @@ gtk_box_gadget_draw (GtkCssGadget *gadget,
   return FALSE;
 }
 
+static gboolean
+gtk_box_gadget_has_content (GtkCssGadget *gadget)
+{
+  return FALSE;
+}
+
 static void
 gtk_box_gadget_finalize (GObject *object)
 {
@@ -539,6 +545,7 @@ gtk_box_gadget_class_init (GtkBoxGadgetClass *klass)
   gadget_class->get_preferred_size = gtk_box_gadget_get_preferred_size;
   gadget_class->allocate = gtk_box_gadget_allocate;
   gadget_class->draw = gtk_box_gadget_draw;
+  gadget_class->has_content = gtk_box_gadget_has_content;
 }
 
 static void