Code cleanup

Create packages

mopidy_touchscreen/graphic_utils/dynamic_background.py

@@ -0,0 +1,74 @@
+import random
+
+
+change_speed = 2
+
+
+class DynamicBackground():
+    def __init__(self):
+        self.current = get_valid_color()
+        self.target = get_valid_color()
+        self.auto_mode = True
+        self.target_current_same = False
+
+    def draw_background(self, surfaces):
+        if not self.target_current_same:
+            for x in range(0, 3):
+                if abs(self.current[x]-self.target[x]) < change_speed:
+                    self.current[x] = self.target[x]
+                    self.target_current_same = True
+                else:
+                    self.target_current_same = False
+                    if self.current[x] > self.target[x]:
+                        self.current[x] -= change_speed
+                    elif self.current[x] < self.target[x]:
+                        self.current[x] += change_speed
+        if self.auto_mode and self.target_current_same:
+            self.target = get_valid_color()
+            self.target_current_same = False
+        for surface in surfaces:
+            surface.fill(self.current)
+
+    def set_target_color(self, color):
+        if color is not None:
+            self.auto_mode = False
+            self.target_current_same = False
+            self.target = get_similar_valid_color(color)
+        else:
+            self.auto_mode = True
+            self.target = get_valid_color()
+            self.target_current_same = False
+
+# It will return the same color if sum is less than 510
+# Otherwise a darker color will be returned
+# White text should be seen ok with this background color
+
+
+def get_similar_valid_color(color):
+    sum = color[0] + color[1] + color[2]
+    new_color = [0, 0, 0]
+    if sum > 510:
+        rest = (sum - 510)/3 + 1
+        for x in range(0, 3):
+            new_color[x] = color[x] - rest
+        return new_color
+    else:
+        return color
+
+# Returns an array with 3 integers in range of 0-255
+# The sum of the three integers will be lower than 255*2
+# (510) to avoid very bright colors
+# White text should be seen ok with this background color
+
+
+def get_valid_color():
+    color = [0, 0, 0]
+    total = 0
+    for i in range(0, 3):
+        color[i] = random.randint(0, 255)
+        total += color[i]
+    extra = total - 510
+    if extra > 0:
+        i = random.randint(0, 2)
+        color[i] -= extra
+    return color