Paint/paint.py at main · Caleb-Leavell/Paint · GitHub

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import pygame
import pygame.gfxdraw
import copy
from collections import deque

import shape
import button

pygame.init()

screen = pygame.display.set_mode([1280, 720])

stroke = {
    'points' : [],
    'brush_size' : 3,
    'brush_color' : (0,0,0)
}

strokes = [copy.deepcopy(stroke)]

undo_stack = deque()

# credit to Davis Yoshida (Stack Overflow)
def map_range(value, start1, stop1, start2, stop2):
   return (value - start1) / (stop1 - start1) * (stop2 - start2) + start2

def draw_line_with_circles(point1, point2, radius, color):
        dist = point1.distance_to(point2)
        for i in range(0, int(dist)):
            pos = pygame.Vector2(map_range(i, 0, dist, point1.x, point2.x), map_range(i, 0, dist, point1.y, point2.y))
            pygame.gfxdraw.aacircle(screen, int(pos.x), int(pos.y), radius, color)
            pygame.gfxdraw.filled_circle(screen, int(pos.x), int(pos.y), radius, color)

def display_strokes(strokes):
        for curr_stroke in strokes:
            for point1, point2 in zip(curr_stroke['points'], curr_stroke['points'][1:]):
                draw_line_with_circles(point1, point2, curr_stroke['brush_size'], curr_stroke['brush_color'])


# Buttons

start = 10
increment = 35
plus_button = button.Button(pygame.Vector2(start, 10), 3, shape.Plus(), (0,0,0), pygame.Vector2(30,30))
minus_button = button.Button(pygame.Vector2(start + increment, 10), 3, shape.Minus(), (0,0,0), pygame.Vector2(30, 30))
black_button = button.Button(pygame.Vector2(start + increment * 2, 10), 15, shape.Circle(), (0,0,0), pygame.Vector2(30, 30))
red_button = button.Button(pygame.Vector2(start + increment * 3, 10), 15, shape.Circle(), (255,0,0), pygame.Vector2(30, 30))
green_button = button.Button(pygame.Vector2(start + increment * 4, 10), 15, shape.Circle(), (0,255,0), pygame.Vector2(30, 30))
blue_button = button.Button(pygame.Vector2(start + increment * 5, 10), 15, shape.Circle(), (0,0,255), pygame.Vector2(30, 30))
white_button = button.Button(pygame.Vector2(start + increment * 6, 10), 15, shape.Circle(), (255,255,255), pygame.Vector2(30, 30))
undo_button = button.Button(pygame.Vector2(pygame.display.get_surface().get_width() - 85, 10), 20, shape.Arrow_Backward(), (0,0,0), pygame.Vector2(30,30))
redo_button = button.Button(pygame.Vector2(pygame.display.get_surface().get_width() - 50, 10), 20, shape.Arrow_Forward(), (0,0,0), pygame.Vector2(30,30))


#setup
background_color = (255, 255, 255)
button_shelf_color = (200, 200, 200)
screen.fill((255, 255, 255))


#loop
running = True
while running:

    # event handling
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        if event.type == pygame.MOUSEBUTTONDOWN:
            if plus_button.mouse_over():
                stroke['brush_size'] += 1
            if minus_button.mouse_over():
                stroke['brush_size'] -= 1
            if black_button.mouse_over():
                stroke['brush_color'] = (0,0,0)
            if red_button.mouse_over():
                stroke['brush_color'] = (255,0,0)
            if green_button.mouse_over():
                stroke['brush_color'] = (0,255,0)
            if blue_button.mouse_over():
                stroke['brush_color'] = (0,0,255)
            if white_button.mouse_over():
                stroke['brush_color'] = (255,255,255)
            if undo_button.mouse_over():
                if len(strokes) >= 2:
                    undo_stack.append(strokes[-2])
                    del strokes[-2]
                    screen.fill(background_color)
                    display_strokes(strokes)
            if redo_button.mouse_over():
                if(len(undo_stack) >= 1):
                    strokes.insert(-2, undo_stack.pop())
                screen.fill(background_color)
                display_strokes(strokes)

    # easy to use variables
    width = pygame.display.get_surface().get_width()
    height = pygame.display.get_surface().get_height()
    mouse_pos = pygame.Vector2(pygame.mouse.get_pos()[0], pygame.mouse.get_pos()[1])

    # background - turned off to allow for dynamic rendering, improving performance

    # adding positions to brush if mouse held down
    mousePos = pygame.Vector2(pygame.mouse.get_pos()[0], pygame.mouse.get_pos()[1])
    if pygame.mouse.get_pressed()[0] and mouse_pos.y > 50:
        stroke['points'].append(mouse_pos)
        strokes[-1] = copy.deepcopy(stroke)
        undo_stack.clear()
    elif len(strokes[-1]['points']) >= 1:
        strokes.append(copy.deepcopy(stroke))
        strokes[-1]['points'] = []
        stroke['points'] = []

    if(len(stroke['points']) >= 2):
        draw_line_with_circles(stroke['points'][-2], stroke['points'][-1], stroke['brush_size'], stroke['brush_color'])

    #display button tray
    pygame.draw.rect(screen, button_shelf_color, pygame.Rect(0, 0, width, 50))
    plus_button.display(screen)
    minus_button.display(screen)
    black_button.display(screen)
    red_button.display(screen)
    green_button.display(screen)
    green_button.display(screen)
    blue_button.display(screen)
    white_button.display(screen)
    undo_button.display(screen)
    redo_button.display(screen)

    #display mouse brush
    if mouse_pos.y < 50 - stroke['brush_size']:
        pygame.draw.circle(screen, stroke['brush_color'], mousePos, stroke['brush_size'])

    # Flip the display
    pygame.display.flip()


pygame.quit()