def _update_preview(self):
"""Update color preview."""
color = self.hexa.get()
if self.alpha_channel:
prev = overlay(self._transparent_bg, hexa_to_rgb(color))
self._im_color = ImageTk.PhotoImage(prev, master=self)
self.color_preview.configure(image=self._im_color)
else:
self.color_preview.configure(background=color)
def __init__(self, parent=None, color=(255, 0, 0), alpha=False,
title=_("Color Chooser")):
"""
Create a ColorPicker dialog.
Arguments:
* parent: parent window
* color: initially selected color in rgb or hexa format
* alpha: alpha channel support (boolean)
* title: dialog title
"""
tk.Toplevel.__init__(self, parent)
self.title(title)
self.transient(self.master)
self.resizable(False, False)
self.rowconfigure(1, weight=1)
self.color = ""
self.alpha_channel = bool(alpha)
style = ttk.Style(self)
style.map("palette.TFrame", relief=[('focus', 'sunken')],
bordercolor=[('focus', "#4D4D4D")])
self.configure(background=style.lookup("TFrame", "background"))
if isinstance(color, str):
if re.match(r"^#[0-9A-F]{8}$", color.upper()):
col = hexa_to_rgb(color)
self._old_color = col[:3]
if alpha:
self._old_alpha = col[3]
old_color = color
else:
old_color = color[:7]
elif re.match(r"^#[0-9A-F]{6}$", color.upper()):
self._old_color = hexa_to_rgb(color)
old_color = color
if alpha:
self._old_alpha = 255
old_color += 'FF'
else:
col = self.winfo_rgb(color)
self._old_color = tuple(round2(c * 255 / 65535) for c in col)
args = self._old_color
if alpha:
self._old_alpha = 255
args = self._old_color + (255,)
old_color = rgb_to_hexa(*args)
else:
self._old_color = color[:3]
if alpha:
if len(color) < 4:
color += (255,)
self._old_alpha = 255
else:
self._old_alpha = color[3]
old_color = rgb_to_hexa(*color)
# --- GradientBar
hue = col2hue(*self._old_color)
bar = ttk.Frame(self, borderwidth=2, relief='groove')
self.bar = GradientBar(bar, hue=hue, width=200, highlightthickness=0)
self.bar.pack()
# --- ColorSquare
square = ttk.Frame(self, borderwidth=2, relief='groove')
self.square = ColorSquare(square, hue=hue, width=200, height=200,
color=rgb_to_hsv(*self._old_color),
highlightthickness=0)
self.square.pack()
frame = ttk.Frame(self)
frame.columnconfigure(1, weight=1)
frame.rowconfigure(1, weight=1)
# --- color preview: initial color and currently selected color side by side
preview_frame = ttk.Frame(frame, relief="groove", borderwidth=2)
preview_frame.grid(row=0, column=0, sticky="nw", pady=2)
if alpha:
self._transparent_bg = create_checkered_image(42, 32)
transparent_bg_old = create_checkered_image(42, 32,
(100, 100, 100, 255),
(154, 154, 154, 255))
prev_old = overlay(transparent_bg_old, hexa_to_rgb(old_color))
prev = overlay(self._transparent_bg, hexa_to_rgb(old_color))
self._im_old_color = ImageTk.PhotoImage(prev_old, master=self)
self._im_color = ImageTk.PhotoImage(prev, master=self)
old_color_prev = tk.Label(preview_frame, padx=0, pady=0,
image=self._im_old_color,
borderwidth=0, highlightthickness=0)
self.color_preview = tk.Label(preview_frame, pady=0, padx=0,
image=self._im_color,
borderwidth=0, highlightthickness=0)
else:
old_color_prev = tk.Label(preview_frame, background=old_color[:7],
width=5, highlightthickness=0, height=2,
padx=0, pady=0)
self.color_preview = tk.Label(preview_frame, width=5, height=2,
pady=0, background=old_color[:7],
padx=0, highlightthickness=0)
old_color_prev.bind("<1>", self._reset_preview)
old_color_prev.grid(row=0, column=0)
self.color_preview.grid(row=0, column=1)
# --- palette
palette = ttk.Frame(frame)
palette.grid(row=0, column=1, rowspan=2, sticky="ne")
for i, col in enumerate(PALETTE):
f = ttk.Frame(palette, borderwidth=1, relief="raised",
style="palette.TFrame")
l = tk.Label(f, background=col, width=2, height=1)
l.bind("<1>", self._palette_cmd)
f.bind("<FocusOut>", lambda e: e.widget.configure(relief="raised"))
l.pack()
f.grid(row=i % 2, column=i // 2, padx=2, pady=2)
col_frame = ttk.Frame(self)
# --- hsv
hsv_frame = ttk.Frame(col_frame, relief="ridge", borderwidth=2)
hsv_frame.pack(pady=(0, 4), fill="x")
hsv_frame.columnconfigure(0, weight=1)
self.hue = LimitVar(0, 360, self)
self.saturation = LimitVar(0, 100, self)
self.value = LimitVar(0, 100, self)
# self.hue = tk.StringVar(self)
# self.saturation = tk.StringVar(self)
# self.value = tk.StringVar(self)
s_h = Spinbox(hsv_frame, from_=0, to=360, width=4, name='spinbox',
textvariable=self.hue, command=self._update_color_hsv)
s_s = Spinbox(hsv_frame, from_=0, to=100, width=4,
textvariable=self.saturation, name='spinbox',
command=self._update_color_hsv)
s_v = Spinbox(hsv_frame, from_=0, to=100, width=4, name='spinbox',
textvariable=self.value, command=self._update_color_hsv)
h, s, v = rgb_to_hsv(*self._old_color)
s_h.delete(0, 'end')
s_h.insert(0, h)
s_s.delete(0, 'end')
s_s.insert(0, s)
s_v.delete(0, 'end')
s_v.insert(0, v)
s_h.grid(row=0, column=1, sticky='w', padx=4, pady=4)
s_s.grid(row=1, column=1, sticky='w', padx=4, pady=4)
s_v.grid(row=2, column=1, sticky='w', padx=4, pady=4)
ttk.Label(hsv_frame, text=_('Hue')).grid(row=0, column=0, sticky='e',
padx=4, pady=4)
ttk.Label(hsv_frame, text=_('Saturation')).grid(row=1, column=0, sticky='e',
padx=4, pady=4)
ttk.Label(hsv_frame, text=_('Value')).grid(row=2, column=0, sticky='e',
padx=4, pady=4)
# --- rgb
rgb_frame = ttk.Frame(col_frame, relief="ridge", borderwidth=2)
rgb_frame.pack(pady=4, fill="x")
rgb_frame.columnconfigure(0, weight=1)
# self.red = tk.StringVar(self)
# self.green = tk.StringVar(self)
# self.blue = tk.StringVar(self)
self.red = LimitVar(0, 255, self)
self.green = LimitVar(0, 255, self)
self.blue = LimitVar(0, 255, self)
s_red = Spinbox(rgb_frame, from_=0, to=255, width=4, name='spinbox',
textvariable=self.red, command=self._update_color_rgb)
s_green = Spinbox(rgb_frame, from_=0, to=255, width=4, name='spinbox',
textvariable=self.green, command=self._update_color_rgb)
s_blue = Spinbox(rgb_frame, from_=0, to=255, width=4, name='spinbox',
textvariable=self.blue, command=self._update_color_rgb)
s_red.delete(0, 'end')
s_red.insert(0, self._old_color[0])
s_green.delete(0, 'end')
s_green.insert(0, self._old_color[1])
s_blue.delete(0, 'end')
s_blue.insert(0, self._old_color[2])
s_red.grid(row=0, column=1, sticky='e', padx=4, pady=4)
s_green.grid(row=1, column=1, sticky='e', padx=4, pady=4)
s_blue.grid(row=2, column=1, sticky='e', padx=4, pady=4)
ttk.Label(rgb_frame, text=_('Red')).grid(row=0, column=0, sticky='e',
padx=4, pady=4)
ttk.Label(rgb_frame, text=_('Green')).grid(row=1, column=0, sticky='e',
padx=4, pady=4)
ttk.Label(rgb_frame, text=_('Blue')).grid(row=2, column=0, sticky='e',
padx=4, pady=4)
# --- hexa
hexa_frame = ttk.Frame(col_frame)
hexa_frame.pack(fill="x")
self.hexa = ttk.Entry(hexa_frame, justify="center", width=10, name='entry')
self.hexa.insert(0, old_color.upper())
ttk.Label(hexa_frame, text="HTML").pack(side="left", padx=4, pady=(4, 1))
self.hexa.pack(side="left", padx=6, pady=(4, 1), fill='x', expand=True)
# --- alpha
if alpha:
alpha_frame = ttk.Frame(self)
alpha_frame.columnconfigure(1, weight=1)
# self.alpha = tk.StringVar(self)
self.alpha = LimitVar(0, 255, self)
alphabar = ttk.Frame(alpha_frame, borderwidth=2, relief='groove')
self.alphabar = AlphaBar(alphabar, alpha=self._old_alpha, width=200,
color=self._old_color, highlightthickness=0)
self.alphabar.pack()
s_alpha = Spinbox(alpha_frame, from_=0, to=255, width=4,
textvariable=self.alpha, command=self._update_alpha)
s_alpha.delete(0, 'end')
s_alpha.insert(0, self._old_alpha)
alphabar.grid(row=0, column=0, padx=(0, 4), pady=4, sticky='w')
ttk.Label(alpha_frame, text=_('Alpha')).grid(row=0, column=1, sticky='e',
padx=4, pady=4)
s_alpha.grid(row=0, column=2, sticky='w', padx=(4, 6), pady=4)
# --- validation
button_frame = ttk.Frame(self)
ttk.Button(button_frame, text="Ok",
command=self.ok).pack(side="right", padx=10)
ttk.Button(button_frame, text=_("Cancel"),
command=self.destroy).pack(side="right", padx=10)
# --- placement
bar.grid(row=0, column=0, padx=10, pady=(10, 4), sticky='n')
square.grid(row=1, column=0, padx=10, pady=(9, 0), sticky='n')
if alpha:
alpha_frame.grid(row=2, column=0, columnspan=2, padx=10,
pady=(1, 4), sticky='ewn')
col_frame.grid(row=0, rowspan=2, column=1, padx=(4, 10), pady=(10, 4))
frame.grid(row=3, column=0, columnspan=2, pady=(4, 10), padx=10, sticky="new")
button_frame.grid(row=4, columnspan=2, pady=(0, 10), padx=10)
# --- bindings
self.bar.bind("<ButtonRelease-1>", self._change_color, True)
self.bar.bind("<Button-1>", self._unfocus, True)
if alpha:
self.alphabar.bind("<ButtonRelease-1>", self._change_alpha, True)
self.alphabar.bind("<Button-1>", self._unfocus, True)
self.square.bind("<Button-1>", self._unfocus, True)
self.square.bind("<ButtonRelease-1>", self._change_sel_color, True)
self.square.bind("<B1-Motion>", self._change_sel_color, True)
s_red.bind('<FocusOut>', self._update_color_rgb)
s_green.bind('<FocusOut>', self._update_color_rgb)
s_blue.bind('<FocusOut>', self._update_color_rgb)
s_red.bind('<Return>', self._update_color_rgb)
s_green.bind('<Return>', self._update_color_rgb)
s_blue.bind('<Return>', self._update_color_rgb)
s_h.bind('<FocusOut>', self._update_color_hsv)
s_s.bind('<FocusOut>', self._update_color_hsv)
s_v.bind('<FocusOut>', self._update_color_hsv)
s_h.bind('<Return>', self._update_color_hsv)
s_s.bind('<Return>', self._update_color_hsv)
s_v.bind('<Return>', self._update_color_hsv)
if alpha:
s_alpha.bind('<Return>', self._update_alpha)
s_alpha.bind('<FocusOut>', self._update_alpha)
self.hexa.bind("<FocusOut>", self._update_color_hexa)
self.hexa.bind("<Return>", self._update_color_hexa)
self.wait_visibility()
self.lift()
self.grab_set()
def test_overlay(self):
im = tkf.create_checkered_image(200, 200)
tkf.overlay(im, (255, 0, 0, 100))