from turtle import * # Set up some constants for slider positions: RED_X = -200 GREEN_X = 0 BLUE_X = 200 TOP = 200 BOTTOM = -200 SLIDER_LENGTH = abs(TOP - BOTTOM) CLICK_RANGE = 40 TEXT_X_OFFSET = -75 TEXT_Y = BOTTOM - 60 COLOR_BOXES = ((0,0,0), (128,128,128), (128,0,0), (128,128,0), (0,128,0), (0,128,128), (0,0,128), (128,0,128), (128,128,64), (0,64,64), (0,128,255), (0,64,128), (128,0,255), (128,64,0), (255,255,255), (192,192,192), (255,0,0), (255,255,0), (0,255,0), (0,255,255), (0,0,255), (255,0,255), (255,255,128), (0,255,128), (128,255,255), (128,128,255), (255,0,128), (255,128,64)) COLOR_BOX_SIZE = 30 COLOR_BOX_TOP = 320 COLOR_BOX_LEFT = -240 COLOR_BOX_GAP = 5 # Set up global variables: red_setting = 0.5 green_setting = 0.5 blue_setting = 0.5 bgcolor((red_setting, green_setting, blue_setting)) color_box_positions = [] red_cursor = Turtle() green_cursor = Turtle() blue_cursor = Turtle() rw = Turtle() gw = Turtle() bw = Turtle() def print_color_values(): # Note: I could have hard-coded all these color values, but I'd # to know if any of these names become invalid for turtle.py. canvas = getcanvas() # Convert color name to RGB tuple: for color_name in ('aliceblue','antiquewhite','antiquewhite1','antiquewhite2','antiquewhite3','antiquewhite4','aqua','aquamarine1','aquamarine2','aquamarine3','aquamarine4','azure','azure1','azure2','azure3','azure4','beige','bisque1','bisque2','bisque3','bisque4','black','blanchedalmond','blue','blue2','blue3','blue4','blueviolet','brown','brown1','brown2','brown3','brown4','burlywood','burlywood1','burlywood2','burlywood3','burlywood4','cadetblue','cadetblue1','cadetblue2','cadetblue3','cadetblue4','chartreuse','chartreuse1','chartreuse2','chartreuse3','chartreuse4','chocolate','chocolate1','chocolate2','chocolate3','chocolate4','coral','coral1','coral2','coral3','coral4','cornflowerblue','cornsilk','cornsilk1','cornsilk2','cornsilk3','cornsilk4','crimson','cyan','cyan2','cyan3','cyan4','darkgoldenrod','darkgoldenrod1','darkgoldenrod2','darkgoldenrod3','darkgoldenrod4','darkgray','darkgreen','darkkhaki','darkolivegreen','darkolivegreen1','darkolivegreen2','darkolivegreen3','darkolivegreen4','darkorange','darkorange1','darkorange2','darkorange3','darkorange4','darkorchid','darkorchid1','darkorchid2','darkorchid3','darkorchid4','darksalmon','darkseagreen','darkseagreen1','darkseagreen2','darkseagreen3','darkseagreen4','darkslateblue','darkslategray','darkslategray1','darkslategray2','darkslategray3','darkslategray4','darkturquoise','darkviolet','deeppink1','deeppink2','deeppink3','deeppink4','deepskyblue','deepskyblue1','deepskyblue2','deepskyblue3','deepskyblue4','dimgray','dodgerblue1','dodgerblue2','dodgerblue3','dodgerblue4','firebrick','firebrick1','firebrick2','firebrick3','firebrick4','floralwhite','forestgreen','gainsboro','ghostwhite','gold1','gold2','gold3','gold4','goldenrod','goldenrod1','goldenrod2','goldenrod3','goldenrod4','gray','gray1','gray10','gray11','gray12','gray13','gray14','gray15','gray16','gray17','gray18','gray19','gray2','gray20','gray21','gray22','gray23','gray24','gray25','gray26','gray27','gray28','gray29','gray3','gray30','gray31','gray32','gray33','gray34','gray35','gray36','gray37','gray38','gray39','gray4','gray40','gray42','gray43','gray44','gray45','gray46','gray47','gray48','gray49','gray5','gray50','gray51','gray52','gray53','gray54','gray55','gray56','gray57','gray58','gray59','gray6','gray60','gray61','gray62','gray63','gray64','gray65','gray66','gray67','gray68','gray69','gray7','gray70','gray71','gray72','gray73','gray74','gray75','gray76','gray77','gray78','gray79','gray8','gray80','gray81','gray82','gray83','gray84','gray85','gray86','gray87','gray88','gray89','gray9','gray90','gray91','gray92','gray93','gray94','gray95','gray97','gray98','gray99','green','green1','green2','green3','green4','greenyellow','honeydew1','honeydew2','honeydew3','honeydew4','hotpink','hotpink1','hotpink2','hotpink3','hotpink4','indianred','indianred1','indianred2','indianred3','indianred4','indigo','ivory1','ivory2','ivory3','ivory4','khaki','khaki1','khaki2','khaki3','khaki4','lavender','lavenderblush1','lavenderblush2','lavenderblush3','lavenderblush4','lawngreen','lemonchiffon1','lemonchiffon2','lemonchiffon3','lemonchiffon4','lightblue','lightblue1','lightblue2','lightblue3','lightblue4','lightcoral','lightcyan1','lightcyan2','lightcyan3','lightcyan4','lightgoldenrod1','lightgoldenrod2','lightgoldenrod3','lightgoldenrod4','lightgoldenrodyellow','lightgrey','lightpink','lightpink1','lightpink2','lightpink3','lightpink4','lightsalmon1','lightsalmon2','lightsalmon3','lightsalmon4','lightseagreen','lightskyblue','lightskyblue1','lightskyblue2','lightskyblue3','lightskyblue4','lightslateblue','lightslategray','lightsteelblue','lightsteelblue1','lightsteelblue2','lightsteelblue3','lightsteelblue4','lightyellow1','lightyellow2','lightyellow3','lightyellow4','limegreen','linen','magenta','magenta2','magenta3','magenta4','maroon','maroon1','maroon2','maroon3','maroon4','mediumorchid','mediumorchid1','mediumorchid2','mediumorchid3','mediumorchid4','mediumpurple','mediumpurple1','mediumpurple2','mediumpurple3','mediumpurple4','mediumseagreen','mediumslateblue','mediumspringgreen','mediumturquoise','mediumvioletred','midnightblue','mintcream','mistyrose1','mistyrose2','mistyrose3','mistyrose4','moccasin','navajowhite1','navajowhite2','navajowhite3','navajowhite4','navy','oldlace','olive','olivedrab','olivedrab1','olivedrab2','olivedrab3','olivedrab4','orange','orange1','orange2','orange3','orange4','orangered1','orangered2','orangered3','orangered4','orchid','orchid1','orchid2','orchid3','orchid4','palegoldenrod','palegreen','palegreen1','palegreen2','palegreen3','palegreen4','paleturquoise1','paleturquoise2','paleturquoise3','paleturquoise4','palevioletred','palevioletred1','palevioletred2','palevioletred3','palevioletred4','papayawhip','peachpuff1','peachpuff2','peachpuff3','peachpuff4','pink','pink1','pink2','pink3','pink4','plum','plum1','plum2','plum3','plum4','powderblue','purple','purple1','purple2','purple3','purple4','red1','red2','red3','red4','rosybrown','rosybrown1','rosybrown2','rosybrown3','rosybrown4','royalblue','royalblue1','royalblue2','royalblue3','royalblue4','salmon','salmon1','salmon2','salmon3','salmon4','sandybrown','seagreen1','seagreen2','seagreen3','seagreen4','seashell1','seashell2','seashell3','seashell4','sienna','sienna1','sienna2','sienna3','sienna4','silver','skyblue','skyblue1','skyblue2','skyblue3','skyblue4','slateblue','slateblue1','slateblue2','slateblue3','slateblue4','slategray','slategray1','slategray2','slategray3','slategray4','snow1','snow2','snow3','snow4','springgreen','springgreen1','springgreen2','springgreen3','steelblue','steelblue1','steelblue2','steelblue3','steelblue4','tan','tan1','tan2','tan3','tan4','teal','thistle','thistle1','thistle2','thistle3','thistle4','tomato1','tomato2','tomato3','tomato4','turquoise','turquoise1','turquoise2','turquoise3','turquoise4','violet','violetred','violetred1','violetred2','violetred3','violetred4','wheat','wheat1','wheat2','wheat3','wheat4','white','whitesmoke','yellow1','yellow2','yellow3','yellow4'): rgb_16bit = canvas.winfo_rgb(color_name) # e.g. returns (65535, 0, 0) for 'red'. rgb_255 = tuple(c // 256 for c in rgb_16bit) # Scale down to 8-bit. rgb_1 = tuple([round(n / 255, 2) for n in rgb_255]) rgb_hex = '#' + ''.join([hex(n)[2:].rjust(2, '0').upper() for n in rgb_255]) # Separated by dashes for easy double-click highlighting (and not CSV because tuples contain commas): print(color_name, rgb_255, rgb_1, rgb_hex, sep='-') def handle_click(x, y): global red_setting, green_setting, blue_setting #print('click', x, y) # Check if the click is on a color box: for i, (boxx, boxy) in enumerate(color_box_positions): if (boxx <= x <= (boxx + COLOR_BOX_SIZE)) and (boxy >= y >= (boxy - COLOR_BOX_SIZE)): #print('color box clicked', i) red_setting, green_setting, blue_setting = COLOR_BOXES[i] # Adjust for colormode 1 (the values in COLOR_BOXES are in colormode 255): red_setting /= 255 green_setting /= 255 blue_setting /= 255 # Move sliders into correct position: red_cursor.sety( BOTTOM + (SLIDER_LENGTH * red_setting)) green_cursor.sety(BOTTOM + (SLIDER_LENGTH * green_setting)) blue_cursor.sety( BOTTOM + (SLIDER_LENGTH * blue_setting)) # Update background color and text: bgcolor((red_setting, green_setting, blue_setting)) write_rgb_values() # Check if the click is on a slider: if y > TOP or y < BOTTOM: return # Outside of range, so do nothing. elif x >= RED_X - CLICK_RANGE and x <= RED_X + CLICK_RANGE: # Only the drag function if the click happened off of the turtle cursor: if y > red_cursor.ycor() + 10 or y < red_cursor.ycor() - 10: handle_red_drag(x, y) elif x >= GREEN_X - CLICK_RANGE and x <= GREEN_X + CLICK_RANGE: # Only the drag function if the click happened off of the turtle cursor: if y > green_cursor.ycor() + 10 or y < green_cursor.ycor() - 10: handle_green_drag(x, y) elif x >= BLUE_X - CLICK_RANGE and x <= BLUE_X + CLICK_RANGE: # Only the drag function if the click happened off of the turtle cursor: if y > blue_cursor.ycor() + 10 or y < blue_cursor.ycor() - 10: handle_blue_drag(x, y) def get_color_values_text(setting): spacer = ' ' setting255 = round(setting * 255) return str(round(setting, 2)).ljust(4, '0') + spacer + \ str(setting255) + spacer + \ '#' + hex(setting255)[2:].rjust(2, '0').upper() def write_rgb_values(): #print((red_setting, green_setting, blue_setting)) # Make text white when background is dark, and black when background is light: if (red_setting + green_setting + blue_setting) / 3 < 0.5: rw.pencolor('white') gw.pencolor('white') bw.pencolor('white') else: rw.pencolor('black') gw.pencolor('black') bw.pencolor('black') for cursor, x, setting in ((rw, RED_X, red_setting), (gw, GREEN_X, green_setting), (bw, BLUE_X, blue_setting)): cursor.clear() cursor.goto(x + TEXT_X_OFFSET, TEXT_Y) cursor.write(get_color_values_text(setting), font=('Arial', 18, 'normal')) update() def handle_red_drag(x, y): global red_setting #print('red drag', x, y) if y > TOP: red_setting = 1.0 red_cursor.sety(TOP) elif y < BOTTOM: red_setting = 0.0 red_cursor.sety(BOTTOM) else: red_setting = abs(y - BOTTOM) / SLIDER_LENGTH red_cursor.sety(y) #print('red drag', x, y, red_setting) bgcolor((red_setting, green_setting, blue_setting)) write_rgb_values() def handle_green_drag(x, y): global green_setting #print('green drag', x, y) if y > TOP: green_setting = 1.0 green_cursor.sety(TOP) elif y < BOTTOM: green_setting = 0.0 green_cursor.sety(BOTTOM) else: green_setting = abs(y - BOTTOM) / SLIDER_LENGTH green_cursor.sety(y) #print('green drag', x, y, green_setting) bgcolor((red_setting, green_setting, blue_setting)) write_rgb_values() def handle_blue_drag(x, y): global blue_setting #print('blue drag', x, y) if y > TOP: blue_setting = 1.0 blue_cursor.sety(TOP) elif y < BOTTOM: blue_setting = 0.0 blue_cursor.sety(BOTTOM) else: blue_setting = abs(y - BOTTOM) / SLIDER_LENGTH blue_cursor.sety(y) #print('blue drag', x, y, blue_setting) bgcolor((red_setting, green_setting, blue_setting)) write_rgb_values() def main(): # Draw slider lines: tracer(1000, 0) hideturtle() pensize(6) setheading(270) for x in (RED_X, 0, BLUE_X): penup() goto(x, TOP) pendown() forward(SLIDER_LENGTH) # Draw color boxes: colormode(255) pensize(1) for i, color in enumerate(COLOR_BOXES): if i < 14: x = COLOR_BOX_LEFT + (i * COLOR_BOX_SIZE) + (i * COLOR_BOX_GAP) y = COLOR_BOX_TOP # Top row of the two rows. else: x = COLOR_BOX_LEFT + ((i-14) * COLOR_BOX_SIZE) + ((i-14) * COLOR_BOX_GAP) y = COLOR_BOX_TOP - COLOR_BOX_GAP - COLOR_BOX_SIZE # Bottom row of the two rows. color_box_positions.append((x,y)) penup() goto(x, y) setheading(0) pendown() fillcolor(color) begin_fill() for j in range(4): forward(COLOR_BOX_SIZE) right(90) end_fill() colormode(1) # Setup turtle cursors for the square slider handles: for cursor, color, x in ((red_cursor, 'red', RED_X), (green_cursor, 'green', GREEN_X), (blue_cursor, 'blue', BLUE_X)): cursor.resizemode('auto') cursor.pensize(10) cursor.shape('square') cursor.fillcolor(color) cursor.penup() cursor.goto(x, 0) # Setup turtle cursors for the text: for t in (rw, gw, bw): t.hideturtle() t.penup() t.pencolor('black') # Print all color names and their values to stdio for easy copy/pasting: print_color_values() getscreen().onclick(handle_click) red_cursor.ondrag(handle_red_drag) green_cursor.ondrag(handle_green_drag) blue_cursor.ondrag(handle_blue_drag) #ontimer(write_rgb_values) write_rgb_values() update() done() if __name__ == '__main__': main()