[gnome-themes-standard] adwaita: properly theme GtkScale marks

[Cosimo Cecchi <cosimoc src gnome org>]

commit 100b6d7a3414842e381ed6ad742d6c4840abf34d
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Mar 15 17:45:30 2011 -0400

    adwaita: properly theme GtkScale marks

 src/adwaita_engine.c           |   39 +++++++++++++++++++++++++++++++++++++++
 themes/Adwaita/gtk-3.0/gtk.css |    4 ++++
 2 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/src/adwaita_engine.c b/src/adwaita_engine.c
index ba6ff08..7f68fc0 100644
--- a/src/adwaita_engine.c
+++ b/src/adwaita_engine.c
@@ -1628,6 +1628,44 @@ adwaita_engine_render_icon_pixbuf (GtkThemingEngine    *engine,
 }
 
 static void
+adwaita_engine_render_line (GtkThemingEngine *engine,
+			    cairo_t *cr,
+			    gdouble x0,
+			    gdouble y0,
+			    gdouble x1,
+			    gdouble y1)
+{
+	const GtkWidgetPath *path;
+
+	path = gtk_theming_engine_get_path (engine);
+
+	if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_MARK) &&
+	    gtk_widget_path_is_type (path, GTK_TYPE_SCALE)) {
+		GtkStateFlags state;
+		GdkRGBA bg;
+
+		state = gtk_theming_engine_get_state (engine);
+		gtk_theming_engine_get_background_color (engine, state, &bg);
+
+		cairo_save (cr);
+
+		cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
+		cairo_set_line_width (cr, 1);
+
+		cairo_move_to (cr, x0 + 0.5, y0 + 0.5);
+		cairo_line_to (cr, x1 + 0.5, y1 + 0.5);
+
+		gdk_cairo_set_source_rgba (cr, &bg);
+		cairo_stroke (cr);
+
+		cairo_restore (cr);
+	} else {
+		GTK_THEMING_ENGINE_CLASS (adwaita_engine_parent_class)->render_line (engine, cr,
+										     x0, y0, x1, y1);
+	}
+}
+
+static void
 adwaita_engine_class_init (AdwaitaEngineClass *klass)
 {
 	GtkThemingEngineClass *engine_class = GTK_THEMING_ENGINE_CLASS (klass);
@@ -1644,6 +1682,7 @@ adwaita_engine_class_init (AdwaitaEngineClass *klass)
 	engine_class->render_slider = adwaita_engine_render_slider;
 	engine_class->render_handle = adwaita_engine_render_handle;
 	engine_class->render_icon_pixbuf = adwaita_engine_render_icon_pixbuf;
+	engine_class->render_line = adwaita_engine_render_line;
 
 	gtk_theming_engine_register_property (ADWAITA_NAMESPACE, NULL,
 					      g_param_spec_boxed ("focus-border-color",
diff --git a/themes/Adwaita/gtk-3.0/gtk.css b/themes/Adwaita/gtk-3.0/gtk.css
index c0791c6..57638b4 100644
--- a/themes/Adwaita/gtk-3.0/gtk.css
+++ b/themes/Adwaita/gtk-3.0/gtk.css
@@ -328,6 +328,10 @@ GtkScale.progressbar {
     border-style: solid;
 }
 
+GtkScale.mark {
+    background-color: shade (@theme_bg_color, 0.56);
+}
+
 GtkFrame,
 GtkCalendar {
     padding: 2;