Factor out more classes from cluster.py

py/hexagram/cluster.py

@@ -3,56 +3,10 @@ import cairo
 
 from typing import Iterable, List
 
+from hexagram.gauge   import Gauge
+from hexagram.dial    import Dial
 from hexagram.pattern import HexagonPattern
 
-class Gauge():
-    def draw_bg(self, cr: cairo.Context):
-        raise NotImplementedError
-
-class Dial(Gauge):
-    __slots = 'x', 'y', 'radius',
-
-    BEZEL_WIDTH = 16
-
-    BEZEL_GRADIENT_STOPS = (
-        (0, 1.0, 0.4, 1.0, 1.0),
-        (1, 0.4, 0.0, 0.4, 0.0)
-    )
-
-    def __init__(self, x: float, y: float, radius: float):
-        self.x      = x
-        self.y      = y
-        self.radius = radius
-
-    def _gradient(self):
-        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_bg(self, cr: cairo.Context):
-        arc = (self.x,
-               self.y,
-               self.radius - self.BEZEL_WIDTH,
-               0,
-               2.0 * math.pi)
-
-        # Gauge face
-        cr.set_source_rgba(0, 0, 0, 1)
-        cr.arc(*arc)
-        cr.fill()
-
-        # Gauge bezel
-        cr.set_source(self._gradient())
-        cr.set_line_width(self.BEZEL_WIDTH)
-        cr.arc(*arc)
-        cr.stroke()
-
 class ShiftIndicator(Gauge):
     LIGHT_WIDTH   = 48
     LIGHT_HEIGHT  = 12

py/hexagram/dial.py

@@ -0,0 +1,48 @@
+import math
+import cairo
+
+from hexagram.gauge import Gauge
+
+class Dial(Gauge):
+    __slots = 'x', 'y', 'radius',
+
+    BEZEL_WIDTH = 16
+
+    BEZEL_GRADIENT_STOPS = (
+        (0, 1.0, 0.4, 1.0, 1.0),
+        (1, 0.4, 0.0, 0.4, 0.0)
+    )
+
+    def __init__(self, x: float, y: float, radius: float):
+        self.x      = x
+        self.y      = y
+        self.radius = radius
+
+    def _gradient(self):
+        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_bg(self, cr: cairo.Context):
+        arc = (self.x,
+               self.y,
+               self.radius - self.BEZEL_WIDTH,
+               0,
+               2.0 * math.pi)
+
+        # Gauge face
+        cr.set_source_rgba(0, 0, 0, 1)
+        cr.arc(*arc)
+        cr.fill()
+
+        # Gauge bezel
+        cr.set_source(self._gradient())
+        cr.set_line_width(self.BEZEL_WIDTH)
+        cr.arc(*arc)
+        cr.stroke()

py/hexagram/gauge.py

@@ -0,0 +1,5 @@
+import cairo
+
+class Gauge():
+    def draw_bg(self, cr: cairo.Context):
+        raise NotImplementedError