safe_css_color.py

safe_css_color.py

'''
	Pythonista Forum - @Phuket2
'''
import ui

_css_colors=['rosybrown', 'antiquewhite', 'lightsteelblue', 'white', 'darkblue', 'darkviolet', 'plum', 'darkcyan', 'blanchedalmond', 'chocolate', 'sienna', 'tomato', 'peachpuff', 'lightyellow', 'bisque', 'aqua', 'oldlace', 'maroon', 'palegreen', 'chartreuse', 'darkturquoise', 'linen', 'magenta', 'lemonchiffon', 'powderblue', 'papayawhip', 'gold', 'khaki', 'lightseagreen', 'darkred', 'floralwhite', 'turquoise', 'mediumspringgreen', 'indianred', 'lightgreen', 'crimson', 'mintcream', 'lavender', 'purple', 'orchid', 'darkslateblue', 'whitesmoke', 'moccasin', 'beige', 'mistyrose', 'dodgerblue', 'hotpink', 'lightcoral', 'goldenrod', 'coral', 'cadetblue', 'black', 'mediumseagreen', 'gainsboro', 'paleturquoise', 'darkgreen', 'darkkhaki', 'mediumblue', 'dimgray', 'darkorchid', 'deeppink', 'mediumvioletred', 'lightgray', 'darkgrey', 'lightsalmon', 'lightblue', 'lightslategrey', 'slategray', 'slateblue', 'greenyellow', 'darkgray', 'lawngreen', 'cornflowerblue', 'midnightblue', 'lightpink', 'deepskyblue', 'navy', 'lightskyblue', 'darkorange', 'blueviolet', 'lightgrey', 'lightgoldenrodyellow', 'violet', 'ivory', 'mediumslateblue', 'cyan', 'rebeccapurple', 'firebrick', 'green', 'burlywood', 'wheat', 'mediumpurple', 'mediumturquoise', 'skyblue', 'peru', 'forestgreen', 'royalblue', 'aquamarine', 'silver', 'olive', 'palevioletred', 'mediumorchid', 'darkslategray', 'darkslategrey', 'steelblue', 'olivedrab', 'lime', 'orangered', 'grey', 'sandybrown', 'slategrey', 'pink', 'blue', 'palegoldenrod', 'ghostwhite', 'brown', 'darkseagreen', 'saddlebrown', 'salmon', 'cornsilk', 'red', 'snow', 'tan', 'aliceblue', 'yellow', 'yellowgreen', 'springgreen', 'thistle', 'navajowhite', 'teal', 'lightcyan', 'orange', 'darksalmon', 'mediumaquamarine', 'darkolivegreen', 'lavenderblush', 'indigo', 'fuchsia', 'honeydew', 'azure', 'lightslategray', 'seagreen', 'gray', 'dimgrey', 'limegreen', 'darkmagenta', 'darkgoldenrod', 'seashell']


def safe_color(css_color):
	rgba = ui.parse_color(css_color)
	r = rgba[0] 
	g = rgba[1]
	b = rgba[2] 
	if (((r + g + b) / 3 ) > .55) :
		return 'black'
	else:
		return 'white'
	
class ScrollViewClass(ui.View):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)

class MyClass(ui.View):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)
	
		self.clr_list = sorted(_css_colors)
		

	def draw(self):
		sq =60
		r = ui.Rect(0, 0, 32, 32)
		cnt = 0
		for y in range(0, 15):
			for x in range(0, 10):
				r.x = r.width * x
				r.y = r.height * y
				self.draw_item(r, self.clr_list[cnt], 'A')
				cnt += 1
				if cnt is len(self.clr_list):
					break
	
	def draw_item(self, r, color, text):
		# hmmm, i think ui.draw_string is doing something a little 
		# stange with the underlying color, not sure
		s = ui.Path.rect(*r)
		ui.set_color(color)
		s.fill()
		fnt = ('Futura', 24)
		fnt_color = safe_color(color)
		ui.draw_string('A', rect=r, font=fnt, color=fnt_color, alignment=ui.ALIGN_CENTER, line_break_mode=ui.LB_TRUNCATE_TAIL)

if __name__ == '__main__':
	w, h = 320, 480
	f = (0, 0, w, h)
	
	mc = MyClass(frame=f, bg_color='white', name = 'CSS Safe Color Test')
	mc.present('sheet', animated=False)