I'm on a roll!

py/hexagram/cluster.py

@@ -1,9 +1,6 @@
 import math
 import cairo
 
-CLUSTER_WIDTH  = 1280
-CLUSTER_HEIGHT =  480
-
 class Gauge():
     __slots = 'x', 'y', 'radius',
 
@@ -20,16 +17,19 @@ class Gauge():
         self.radius = radius
 
     def _gradient(self):
-        gradient = cairo.LinearGradient(0, 0, 2 * self.radius, 2 * self.radius)
+        gradient = cairo.LinearGradient(self.x - self.radius,
+                                        self.y - self.radius,
+                                        self.x + self.radius,
+                                        self.y + self.radius)
 
         for stop in self.BEZEL_GRADIENT_STOPS:
             gradient.add_color_stop_rgba(*stop)
 
         return gradient
 
-    def _draw_face(self, cr: cairo.Context):
-        arc = (self.radius,
-               self.radius,
+    def draw_bg(self, cr: cairo.Context):
+        arc = (self.x,
+               self.y,
                self.radius - self.BEZEL_WIDTH,
                0,
                2.0 * math.pi)
@@ -44,3 +44,19 @@ class Gauge():
         cr.set_line_width(self.BEZEL_WIDTH)
         cr.arc(*arc)
         cr.stroke()
+
+class Cluster():
+    WIDTH  = 1280
+    HEIGHT =  480
+
+    __slots__ = 'gauges',
+
+    def __init__(self):
+        self.gauges = list()
+
+        for x in (self.HEIGHT / 2, self.WIDTH - self.HEIGHT / 2):
+            self.gauges.append(Gauge(x, self.HEIGHT / 2, self.HEIGHT / 2))
+
+    def draw_bg(self, cr: cairo.Context):
+        for gauge in self.gauges:
+            gauge.draw_bg(cr)