gradient filled rect class

pgfw/Gradient.py

@@ -0,0 +1,30 @@
+from .GameChild import GameChild
+from .extension import get_random_hsla_color, get_range_steps, get_hsla_color
+
+class Gradient(GameChild):
+
+    def __init__(self, parent, rect, granularity, start=None, end=None):
+        GameChild.__init__(self, parent)
+        if start is None:
+            start = get_random_hsla_color()
+        self.start = start
+        if end is None:
+            end = get_random_hsla_color()
+        self.end = end
+        self.rect = rect
+        self.granularity = granularity
+
+    def update(self):
+        ds = self.get_display_surface()
+        y = self.rect.top
+        hues = list(get_range_steps(self.start.hsla[0], self.end.hsla[0],
+                                    self.granularity))
+        saturations = list(get_range_steps(self.start.hsla[1], self.end.hsla[1],
+                                           self.granularity))
+        lightnesses = list(get_range_steps(self.start.hsla[2], self.end.hsla[2],
+                                           self.granularity))
+        for index in range(len(hues)):
+            h = self.rect.h // self.granularity
+            ds.fill(get_hsla_color(int(hues[index]), int(saturations[index]), int(lightnesses[index])),
+                    (self.rect.left, y, self.rect.w, h))
+            y += h