[gnome-themes-standard] Bug 641859 - fill-level on scales looks bad

[Carlos Garnacho <carlosg src gnome org>]

commit 5a9cccc7e956adeb0297ae3c87a3de2186dc44f1
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Feb 14 18:24:57 2011 +0100

    Bug 641859 - fill-level on scales looks bad
    
    Render the sliders' fill level as thin as the trough. Reported
    by Bastien Nocera.

 src/adwaita_engine.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/src/adwaita_engine.c b/src/adwaita_engine.c
index ed7bc00..4bb26c4 100644
--- a/src/adwaita_engine.c
+++ b/src/adwaita_engine.c
@@ -542,7 +542,26 @@ adwaita_engine_render_activity (GtkThemingEngine *engine,
 				gdouble           width,
 				gdouble           height)
 {
+	const GtkWidgetPath *path;
+
 	cairo_save (cr);
+	path = gtk_theming_engine_get_path (engine);
+
+	if (gtk_widget_path_is_type (path, GTK_TYPE_SCALE) &&
+	    gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PROGRESSBAR))
+	{
+		/* Render GtkScale fill level thinner */
+		if (!gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_VERTICAL))
+		{
+			y += height / 2 - 3;
+			height = 6;
+		}
+		else
+		{
+			x += width / 2 - 3;
+			width = 6;
+		}
+	}
 
 	GTK_THEMING_ENGINE_CLASS (adwaita_engine_parent_class)->render_activity (engine, cr,
 										 x, y, width, height);