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# -*- coding: utf-8 -*-
import pygame
from math import pi, cos, sin
from classes.simple_vector import Vector2
class Fraction:
def __init__(self, unit_size, scale, color1, color2, border_color1, border_color2, numbers, border_width):
self.size = unit_size * scale
self.center = [self.size // 2, self.size // 2]
self.color1 = color1
self.color2 = color2
self.border_color1 = border_color1
self.border_color2 = border_color2
self.numbers = numbers
self.border_width = border_width
self.canvas = pygame.Surface([self.size, self.size - 1], flags=pygame.SRCALPHA)
self.offset_selected = self.size // 30
self.offset_unselected = self.size // 60
self.set_offset(30, 60)
def set_offset(self, selected, unselected):
if selected > 0:
self.offset_selected = self.size // selected
else:
self.offset_selected = 0
if unselected > 0:
self.offset_unselected = self.size // unselected
else:
self.offset_unselected = 0
self.canvas.fill((0, 0, 0, 0))
if self.offset_selected == 0:
self.draw_fraction_no_offset()
else:
self.draw_fraction()
def get_canvas(self):
return self.canvas
def update_values(self, numbers):
self.numbers = numbers
self.canvas.fill((0, 0, 0, 0))
if self.offset_selected == 0:
self.draw_fraction_no_offset()
else:
self.draw_fraction()
def draw_fraction(self):
if self.numbers == [0, 0]:
pass
elif self.numbers == [1, 1]:
#draw circle
r = self.size // 2 - self.size // 10
m = (self.size - r * 2) // 2
cx = m + r
cy = m + r
pygame.draw.circle(self.canvas, self.color1, (cx, cy), r, 0)
pygame.draw.circle(self.canvas, self.border_color1, (cx, cy), r, 1)
else:
r = self.size // 2 - self.size // 10
m = (self.size - r * 2) // 2
if self.numbers[1] < 48:
step = 5
else:
step = 2
angle = 360.0 / self.numbers[1]
angle_start_f = (self.numbers[0] * angle) / 2.0
for i in range(self.numbers[1]):
if i < self.numbers[0] and self.numbers[0] > 0:
col = self.color1
bd_col = self.border_color1
offset = self.offset_selected
else:
col = self.color2
bd_col = self.border_color2
offset = self.offset_unselected
# Center and radius of pie chart
cx = m + r
cy = m + r
#create vector to push the pieces away from the centre towards middle of the arch
centre_vect = Vector2().from_points([cx, cy],
[cx + (r * cos(((angle*(i+1) - angle / 2.0) -
angle_start_f) * pi / 180.0)),
cy + (r * sin(((angle*(i+1) - angle / 2.0) -
angle_start_f) * pi / 180.0))])
centre_vect.normalize()
#first point
p = [(cx + centre_vect[0] * offset, cy + centre_vect[1] * offset)]
# Get points on arc
for n in range(int(round(angle*i)), int(round(angle*(i+1))), step):
x = cx + int(round(r * cos((n-angle_start_f) * pi / 180) + centre_vect[0] * offset))
y = cy + int(round(r * sin((n-angle_start_f) * pi / 180) + centre_vect[1] * offset))
p.append((x, y))
# final point on arc
n = angle * (i + 1)
x = cx + int(round(r * cos((n-angle_start_f) * pi / 180) + centre_vect[0] * offset))
y = cy + int(round(r * sin((n-angle_start_f) * pi / 180) + centre_vect[1] * offset))
p.append((x, y))
# last point - same as the first one
p.append((cx + centre_vect[0] * offset, cy + centre_vect[1] * offset))
# Draw pie segment
if len(p) > 2:
pygame.draw.polygon(self.canvas, col, p)
pygame.draw.polygon(self.canvas, bd_col, p, self.border_width)
def draw_fraction_no_offset(self):
if self.numbers[1] != 0:
a = 360.0 * self.numbers[0] / self.numbers[1]
nums = [a, 360 - a]
cols = [self.color1, self.color2]
bd_cols = [self.border_color1, self.border_color2]
self.draw_background(nums, cols, bd_cols)
self.draw_lines()
def draw_lines(self):
r = self.size // 2 - self.size // 10
m = (self.size - r * 2) // 2
angle = 360.0 / self.numbers[1]
angle_start_f = (self.numbers[0] * angle) / 2.0
for i in range(self.numbers[1]):
if i < self.numbers[0]:
bd_col = self.border_color1
else:
bd_col = self.border_color2
# Center and radius of pie chart
cx = m + r
cy = m + r
#first point
p = [(cx, cy)]
# second point (on arc)
n = angle * (i + 1)
x = cx + int(round(r * cos((n-angle_start_f) * pi / 180)))
y = cy + int(round(r * sin((n-angle_start_f) * pi / 180)))
p.append((x, y))
if i < self.numbers[1]-1:
pygame.draw.line(self.canvas, bd_col, p[0], p[1], 2)
if i == self.numbers[1]-1 or i == self.numbers[0]-1:
pygame.draw.line(self.canvas, self.border_color1, p[0], p[1], 3)
def draw_background(self, num, cols, bd_cols):
r = self.size // 2 - self.size // 10
m = (self.size - r * 2) // 2
angles = []
angle_start_float = []
for i in range(len(num)):
angles.append(num[i])
if i == 0:
angle_start_float.append(360-num[0] / 2.0)
else:
angle_start_float.append(angle_start_float[-1] + angles[i - 1])
for i in range(len(num)):
if i == 0:
w = 3
else:
w = 2
# Center and radius of pie chart
cx = m + r
cy = m + r
# first point
p = [(cx, cy)]
# Get points on arc
for n in range(int(round(angle_start_float[i])), int(round(angle_start_float[i] + angles[i])), 3):
x = cx + int(round(r * cos(n * pi / 180)))
y = cy + int(round(r * sin(n * pi / 180)))
p.append((x, y))
# final point on arc
n = int(round(angle_start_float[i] + angles[i]))
x = cx + int(round(r * cos(n * pi / 180)))
y = cy + int(round(r * sin(n * pi / 180)))
p.append((x, y))
# last point
p.append((cx, cy))
# Draw pie segment
if len(p) > 2 and angles[i] > 0:
pygame.draw.polygon(self.canvas, cols[i], p)
pygame.draw.lines(self.canvas, bd_cols[i], False, p[1:-1], w)
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