def __init__(self,
parent,
hue,
color=None,
cr=COLORCOR_MAX,
cg=int(69 * COLORCOR_MAX / 100),
cb=int(94 * COLORCOR_MAX / 100),
height=256,
width=256,
**kwargs):
"""
Create a ColorSquare.
Keyword arguments:
* parent: parent window
* hue: color square gradient for given hue (color in top right corner
is (hue, 100, 100) in HSV
* color: initially selected color given in HSV
* width, height and any keyword option accepted by a tkinter Canvas
"""
tk.Canvas.__init__(self, parent, height=height, width=width, **kwargs)
self.bg = tk.PhotoImage(width=width, height=height, master=self)
self._hue = hue
if not color:
color = hue2col(self._hue)
self.cr = cr
self.cg = cg
self.cb = cb
self.bind('<Configure>', lambda e: self._draw(color))
self.bind('<ButtonPress-1>', self._on_click)
self.bind('<B1-Motion>', self._on_move)
def correct_hue(self, hue):
r, g, b = hue2col(hue)
crf = COLORCOR_MAX/int(self.cr)
cgf = COLORCOR_MAX/int(self.cg)
cbf = COLORCOR_MAX/int(self.cb)
rcor = int(r*crf)
gcor = int(g*cgf)
bcor = int(b*cbf)
if rcor > 255: rcor = 255
if gcor > 255: gcor = 255
if bcor > 255: bcor = 255
args = (rcor,gcor, bcor)
h,s,v = rgb_to_hsv(*args)
h= hue
return h
def _fill(self):
"""Create the gradient."""
r, g, b = hue2col(self._hue)
width = self.winfo_width()
height = self.winfo_height()
h = float(height - 1)
w = float(width - 1)
if height:
data = []
brightness = int(self._hue) #int(self._hue/255*100)
radius = min(height, width) / 2.0
centre = height / 2, width / 2
crf = COLORCOR_MAX / self.cr
cgf = COLORCOR_MAX / self.cg
cbf = COLORCOR_MAX / self.cb
for y in range(height):
line = []
ry = y - centre[1]
y2 = ry * ry
for x in range(width):
rx = x - centre[0]
x2 = rx * rx
s = int((math.sqrt(x2 + y2) / radius) * 100)
# s = ((x2 + (y - centre[1])**2.0)**0.5 / radius
if s <= 100:
h = int(((math.atan2(ry, rx) / math.pi) + 1.0) * 180)
h = self._correct_hue_for_disp(h)
rxy, gxy, bxy = hsv_to_rgb(h, s, 100)
rxy = int(rxy * crf)
gxy = int(gxy * cgf)
bxy = int(bxy * cbf)
if rxy > 255: rxy = 255
if gxy > 255: gxy = 255
if bxy > 255: bxy = 255
color = rgb_to_hexa(rxy, gxy, bxy)
else:
color = rgb_to_hexa(255, 255, 255)
line.append(color)
data.append("{" + " ".join(line) + "}")
self.bg.put(" ".join(data))
def _fill(self):
"""Create the gradient."""
r, g, b = hue2col(self._hue)
width = self.winfo_width()
height = self.winfo_height()
h = float(height - 1)
w = float(width - 1)
if height:
c = [(r + i / h * (255 - r), g + i / h * (255 - g), b + i / h * (255 - b)) for i in range(height)]
data = []
for i in range(height):
line = []
for j in range(width):
rij = round2(j / w * c[i][0])
gij = round2(j / w * c[i][1])
bij = round2(j / w * c[i][2])
color = rgb_to_hexa(rij, gij, bij)
line.append(color)
data.append("{" + " ".join(line) + "}")
self.bg.put(" ".join(data))
def _draw_gradient(self, hue):
"""Draw the gradient and put the cursor on hue."""
self.delete("gradient")
self.delete("cursor")
del self.gradient
width = self.winfo_width()
height = self.winfo_height()
self.gradient = tk.PhotoImage(master=self, width=width, height=height)
line = []
for i in range(width):
line.append(rgb_to_hexa(*hue2col(float(i) / width * 360)))
line = "{" + " ".join(line) + "}"
self.gradient.put(" ".join([line for j in range(height)]))
self.create_image(0, 0, anchor="nw", tags="gradient",
image=self.gradient)
self.lower("gradient")
x = hue / 360. * width
self.create_line(x, 0, x, height, width=2, tags='cursor')
def test_hue2col(self):
self.assertEqual(tkf.hue2col(0), (255, 0, 0))
self.assertRaises(ValueError, tkf.hue2col, 365)
self.assertRaises(ValueError, tkf.hue2col, -20)