[nautilus/gnome-3-18] toolbar: use the theme color for the operations icon

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 4c9d1b2acc49b19f9d9225ea419078f444d763ae
Author: Elias Aebi <user142 hotmail com>
Date:   Wed Oct 21 11:54:52 2015 +0200

    toolbar: use the theme color for the operations icon
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756803

 src/nautilus-toolbar.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/nautilus-toolbar.c b/src/nautilus-toolbar.c
index 3a90395..2f02e74 100644
--- a/src/nautilus-toolbar.c
+++ b/src/nautilus-toolbar.c
@@ -663,8 +663,14 @@ on_operations_icon_draw (GtkWidget       *widget,
         guint width;
         guint height;
         gboolean all_cancelled;
-        GdkRGBA background = {.red = 0, .green = 0, .blue = 0, .alpha = 0.2 };
-        GdkRGBA foreground = {.red = 0, .green = 0, .blue = 0, .alpha = 0.7 };
+        GdkRGBA background;
+        GdkRGBA foreground;
+        GtkStyleContext *style_context;
+
+        style_context = gtk_widget_get_style_context (widget);
+        gtk_style_context_get_color (style_context, gtk_widget_get_state_flags (widget), &foreground);
+        background = foreground;
+        background.alpha *= 0.3;
 
         all_cancelled = TRUE;
         progress_infos = get_filtered_progress_infos (self);