added a circle button for the loop stations and the beat player

circle_button.py

@@ -0,0 +1,21 @@
+import pygame
+from colors import *
+import math
+
+class CircleButton:
+
+    def __init__(self, gui, x, y, radius):
+        self.screen = gui.screen
+        self.x = x
+        self.y = y
+        self.radius = radius
+        self.color = color_primary
+
+    def check_click(self, pos, action):
+        if math.sqrt(math.pow(pos[0] - self.x, 2) +
+                     math.pow(pos[1] - self.y, 2)) < self.radius:
+            action()
+
+    def display(self):
+        pygame.draw.circle(self.screen, self.color,
+                                   (self.x, self.y), self.radius)

main.py

@@ -4,6 +4,8 @@ from fonts import *
 from knobs import Knobs
 from lozenge_button import LozengeButton
 from binary_button import BinaryButton
+from circle_button import CircleButton
+from functools import partial
 
 class GuiMain:
 
@@ -43,12 +45,24 @@ class GuiMain:
 
         self.set_fx_mode(self.fx_mode_labels[self.fx_mode])
 
-        self.mute_button = BinaryButton(self.screen, (20, self.fx_mode_buttons[0].y-20), (40, 40), 'M', False)
-
+        self.mute_button = BinaryButton(
+            self.screen,
+            (20, self.fx_mode_buttons[0].y-20),
+            (40, 40), 'M',
+            False)
+        self.beat_button = CircleButton(self, 40, self.fx_mode_buttons[1].y, 20)
+        self.rloop_button = CircleButton(self, 40, self.fx_mode_buttons[2].y, 20)
+        self.lloop_button = CircleButton(self, 40, self.fx_mode_buttons[3].y, 20)
+    
         self.clock = pygame.time.Clock()
         self.running = True
         self.run()
 
+    def change_color(self, component):
+        if component.color == color_primary:
+            component.color = color_primary_dark
+        else: component.color = color_primary
+
     def set_fx_mode(self, mode):
         self.fx_mode = self.fx_mode_labels.index(mode)
         self.knobs[self.fx_mode].set_focused(None)
@@ -80,8 +94,9 @@ class GuiMain:
                                 (self.fx_mode_buttons[i].radius_x*0.5 + 60, self.fx_mode_buttons[i].y),
                                 (self.fx_mode_buttons[i].x - self.fx_mode_buttons[i].radius_x * 1.5,
                                  self.fx_mode_buttons[i].y))
-                pygame.draw.circle(self.screen, color_primary,
-                                   (40, self.fx_mode_buttons[i].y), 20)
+            self.beat_button.display()
+            self.lloop_button.display()
+            self.rloop_button.display()
 
             pygame.draw.polygon(self.screen, "white", [(0, self.screenH/2), (self.screenW*3 / 19, self.screenH), (0, self.screenH)])
             # flip() the display to put your work on screen
@@ -98,6 +113,9 @@ class GuiMain:
                 if event.type == pygame.MOUSEBUTTONDOWN:
                     if event.button == 1:
                         self.mute_button.check_click(pygame.mouse.get_pos())
+                        self.beat_button.check_click(pygame.mouse.get_pos(), partial(self.change_color, self.beat_button))
+                        self.lloop_button.check_click(pygame.mouse.get_pos(), partial(self.change_color, self.lloop_button))
+                        self.rloop_button.check_click(pygame.mouse.get_pos(), partial(self.change_color, self.rloop_button))
 
         pygame.quit()