[baobab] Ringchart: always use the correct state when getting colors

[Stefano Facchini <sfacchini src gnome org>]

commit 5380d41b1ce90973558fc6edcd8dbd85c06318a7
Author: Sebastian Keller <sebastian-keller gmx de>
Date:   Mon Sep 7 22:51:09 2015 +0200

    Ringchart: always use the correct state when getting colors
    
    The ringchart was calling get_background_color on the toplevel context
    with a fixed state of NORMAL without saving the context first. If the
    toplevel however had additional state flags set, such as BACKDROP, this
    could trigger an invalidation and cause a redraw, resulting in a redraw
    loop.
    
    Instead of saving/restoring the context, this patch uses the current
    state of the context, which is the right thing to do in general anyway
    and does not require saving/restoring the context unless the context is
    actually modified.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754703

 src/baobab-ringschart.vala |   18 +++++++++++++-----
 1 files changed, 13 insertions(+), 5 deletions(-)
---
diff --git a/src/baobab-ringschart.vala b/src/baobab-ringschart.vala
index c87de29..d489eda 100644
--- a/src/baobab-ringschart.vala
+++ b/src/baobab-ringschart.vala
@@ -94,6 +94,7 @@ namespace Baobab {
             }
 
             var context = get_style_context ();
+            var context_state = context.get_state ();
             context.save ();
             context.add_class ("subfolder-tip");
             context.add_class ("tooltip");
@@ -107,7 +108,7 @@ namespace Baobab {
 
             Gdk.Rectangle last_rect = Gdk.Rectangle ();
 
-            var padding = context.get_padding (Gtk.StateFlags.NORMAL);
+            var padding = context.get_padding (context_state);
             var vpadding = padding.top + padding.bottom;
             var hpadding = padding.left + padding.right;
 
@@ -194,7 +195,7 @@ namespace Baobab {
                     cr.rectangle (tooltip_rect.x + tooltip_rect.width, tooltip_rect.y, -tooltip_rect.width, 
tooltip_rect.height);
                     cr.clip ();
 
-                    var bg_color = context.get_background_color (Gtk.StateFlags.NORMAL);
+                    var bg_color = context.get_background_color (context_state);
                     cr.set_line_width (1);
                     cr.move_to (sector_center_x, sector_center_y);
                     Gdk.cairo_set_source_rgba (cr, bg_color);
@@ -235,10 +236,14 @@ namespace Baobab {
             get_allocation (out allocation);
 
             var context = get_style_context ();
+            var context_state = context.get_state ();
             context.save ();
 
-            var border_color = context.get_border_color (Gtk.StateFlags.NORMAL);
-            var bg_color = get_toplevel ().get_style_context ().get_background_color (Gtk.StateFlags.NORMAL);
+            var toplevel_context = get_toplevel ().get_style_context ();
+            var toplevel_context_state = toplevel_context.get_state ();
+
+            var border_color = context.get_border_color (context_state);
+            var bg_color = toplevel_context.get_background_color (toplevel_context_state);
 
             var center_x = allocation.width / 2;
             var center_y = allocation.height / 2;
@@ -298,7 +303,10 @@ namespace Baobab {
             Gtk.Allocation allocation;
             get_allocation (out allocation);
 
-            var padding = get_style_context ().get_padding (Gtk.StateFlags.NORMAL);
+            var context = get_style_context ();
+            var context_state = context.get_state ();
+
+            var padding = context.get_padding (context_state);
             var max_radius = int.min (allocation.width / 2, allocation.height / 2) - padding.left; // 
Assuming that padding is the same for all sides
             var thickness = max_radius / (max_depth + 1);