[gtk+] expander: center the arrow

[Matthias Clasen <matthiasc src gnome org>]

commit 0acc6578d81dd955bcaf1e451e6523ac776191d8
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jan 14 07:33:04 2016 -0500

    expander: center the arrow
    
    In lieu of more sophisticated alignment, we need to at least
    center the arrow allocation wrt to the label.

 gtk/gtkexpander.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkexpander.c b/gtk/gtkexpander.c
index aa80567..28173cc 100644
--- a/gtk/gtkexpander.c
+++ b/gtk/gtkexpander.c
@@ -817,7 +817,7 @@ gtk_expander_allocate_title (GtkCssGadget        *gadget,
       else
         label_allocation.x = allocation->x + label_xoffset;
 
-      label_allocation.y = allocation->y;
+      label_allocation.y = allocation->y + MAX (0, (arrow_height - label_height) / 2);
       label_allocation.height = label_height;
 
       gtk_widget_size_allocate (priv->label_widget, &label_allocation);
@@ -833,7 +833,7 @@ gtk_expander_allocate_title (GtkCssGadget        *gadget,
     arrow_allocation.x = allocation->x + allocation->width - arrow_width;
   else
     arrow_allocation.x = allocation->x;
-  arrow_allocation.y = allocation->y;
+  arrow_allocation.y = allocation->y + MAX (0, (label_height - arrow_height) / 2);
   arrow_allocation.width = arrow_width;
   arrow_allocation.height = arrow_height;