[hamster-applet/gnome-2-28] added Color constant class, and set_color convenience function

[Toms Baugis <tbaugis src gnome org>]

commit b19595ab0701343dd8a6fadcb7d1102aee0ee50c
Author: Toms Bauģis <toms baugis gmail com>
Date:   Sun Nov 8 20:23:10 2009 +0000

    added Color constant class, and set_color convenience function
    removed the colorsys wrappers

 hamster/graphics.py |   23 +++++++++++++++++------
 1 files changed, 17 insertions(+), 6 deletions(-)
---
diff --git a/hamster/graphics.py b/hamster/graphics.py
index 7443255..4e2cf3a 100644
--- a/hamster/graphics.py
+++ b/hamster/graphics.py
@@ -2,7 +2,11 @@ import time, datetime as dt
 import gtk, gobject
 
 import pango, cairo
-import colorsys
+
+class Colors(object):
+    aluminium = [(238, 238, 236), (211, 215, 207), (186, 189, 182),
+                 (136, 138, 133), (85, 87, 83), (46, 52, 54)]
+    almost_white = (250, 250, 250)
 
 class Area(gtk.DrawingArea):
     """Abstraction on top of DrawingArea to work specifically with cairo"""
@@ -63,13 +67,21 @@ class Area(gtk.DrawingArea):
         self.mouse_regions = [] #regions of drawing that respond to hovering/clicking
         self.__prev_mouse_regions = None
 
+    def set_color(self, color, opacity = None):
+        if color[0] > 1 or color[1] > 0 or color[2] > 0:
+            color = [c / 255.0 for c in color]
+
+        if opacity:
+            self.context.set_source_rgba(color[0], color[1], color[2], opacity)
+        elif len(color) == 3:
+            self.context.set_source_rgb(*color)
+        else:
+            self.context.set_source_rgba(*color)
+
+
     def register_mouse_region(self, x1, y1, x2, y2, region_name):
         self.mouse_regions.append((x1, y1, x2, y2, region_name))
 
-    def hls(self, color):
-        # converts hls to rgb
-        return colorsys.hls_to_rgb(*color)
-
     def redraw_canvas(self):
         """Force graph redraw"""
         if self.window:    #this can get called before expose
@@ -80,7 +92,6 @@ class Area(gtk.DrawingArea):
     def _render(self):
         raise NotImplementedError
 
-
     def set_value_range(self, x_min = None, x_max = None, y_min = None, y_max = None):
         """sets up our internal conversion matrix, because cairo one will
         scale also fonts and we need something in between!"""