scale: port scale values to gadgets

And add a default color like it was before.
This also fixes other issues with scale values interacting with scale
mark labels, which were buggy at least since 3.18.

1 files changed, 6 insertions, 0 deletions

diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index c80f8b7e8a..3da3dc05eb 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -4045,3 +4045,9 @@ gtk_range_get_slider_gadget (GtkRange *range)
 {
   return range->priv->slider_gadget;
 }
+
+GtkCssGadget *
+gtk_range_get_gadget (GtkRange *range)
+{
+  return range->priv->gadget;
+}