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"""DetailsViewer class.
This class implements a pure input window which allows you to meticulously
edit the current color. You have both mouse control of the color (via the
buttons along the bottom row), and there are keyboard bindings for each of the
increment/decrement buttons.
The top three check buttons allow you to specify which of the three color
variations are tied together when incrementing and decrementing. Red, green,
and blue are self evident. By tying together red and green, you can modify
the yellow level of the color. By tying together red and blue, you can modify
the magenta level of the color. By tying together green and blue, you can
modify the cyan level, and by tying all three together, you can modify the
grey level.
The behavior at the boundaries (0 and 255) are defined by the `At boundary'
option menu:
Stop
When the increment or decrement would send any of the tied variations
out of bounds, the entire delta is discarded.
Wrap Around
When the increment or decrement would send any of the tied variations
out of bounds, the out of bounds variation is wrapped around to the
other side. Thus if red were at 238 and 25 were added to it, red
would have the value 7.
Preseve Distance
When the increment or decrement would send any of the tied variations
out of bounds, all tied variations are wrapped as one, so as to
preserve the distance between them. Thus if green and blue were tied,
and green was at 238 while blue was at 223, and an increment of 25
were applied, green would be at 15 and blue would be at 0.
Squash
When the increment or decrement would send any of the tied variations
out of bounds, the out of bounds variation is set to the ceiling of
255 or floor of 0, as appropriate. In this way, all tied variations
are squashed to one edge or the other.
The following key bindings can be used as accelerators. Note that Pynche can
fall behind if you hold the key down as a key repeat:
Left arrow == -1
Right arrow == +1
Control + Left == -10
Control + Right == 10
Shift + Left == -25
Shift + Right == +25
"""
from Tkinter import *
STOP = 'Stop'
WRAP = 'Wrap Around'
RATIO = 'Preserve Distance'
GRAV = 'Squash'
class DetailsViewer:
def __init__(self, switchboard, parent=None):
self.__sb = switchboard
self.__red, self.__green, self.__blue = switchboard.current_rgb()
# GUI
root = self.__root = Toplevel(parent, class_='Pynche')
root.protocol('WM_DELETE_WINDOW', self.__withdraw)
root.title('Pynche Details Window')
root.iconname('Pynche Details Window')
root.bind('<Alt-q>', self.__quit)
root.bind('<Alt-Q>', self.__quit)
root.bind('<Alt-w>', self.__withdraw)
root.bind('<Alt-W>', self.__withdraw)
# accelerators
root.bind('<KeyPress-Left>', self.__minus1)
root.bind('<KeyPress-Right>', self.__plus1)
root.bind('<Control-KeyPress-Left>', self.__minus10)
root.bind('<Control-KeyPress-Right>', self.__plus10)
root.bind('<Shift-KeyPress-Left>', self.__minus25)
root.bind('<Shift-KeyPress-Right>', self.__plus25)
#
# color ties
frame = self.__frame = Frame(root)
frame.pack(expand=YES, fill=X)
self.__l1 = Label(frame, text='Move Sliders:')
self.__l1.grid(row=1, column=0, sticky=E)
self.__rvar = IntVar()
self.__rvar.set(4)
self.__radio1 = Checkbutton(frame, text='Red',
variable=self.__rvar,
command=self.__effect,
onvalue=4, offvalue=0)
self.__radio1.grid(row=1, column=1, sticky=W)
self.__gvar = IntVar()
self.__gvar.set(2)
self.__radio2 = Checkbutton(frame, text='Green',
variable=self.__gvar,
command=self.__effect,
onvalue=2, offvalue=0)
self.__radio2.grid(row=2, column=1, sticky=W)
self.__bvar = IntVar()
self.__bvar.set(1)
self.__radio3 = Checkbutton(frame, text='Blue',
variable=self.__bvar,
command=self.__effect,
onvalue=1, offvalue=0)
self.__radio3.grid(row=3, column=1, sticky=W)
self.__l2 = Label(frame)
self.__l2.grid(row=4, column=1, sticky=W)
self.__effect()
#
# Boundary behavior
self.__l3 = Label(frame, text='At boundary:')
self.__l3.grid(row=5, column=0, sticky=E)
self.__boundvar = StringVar()
self.__boundvar.set(STOP)
self.__omenu = OptionMenu(frame, self.__boundvar,
STOP, WRAP, RATIO, GRAV)
self.__omenu.grid(row=5, column=1, sticky=W)
self.__omenu.configure(width=17)
#
# Buttons
frame = self.__btnframe = Frame(frame)
frame.grid(row=0, column=0, columnspan=2, sticky='EW')
self.__down25 = Button(frame, text='-25',
command=self.__minus25)
self.__down10 = Button(frame, text='-10',
command=self.__minus10)
self.__down1 = Button(frame, text='-1',
command=self.__minus1)
self.__up1 = Button(frame, text='+1',
command=self.__plus1)
self.__up10 = Button(frame, text='+10',
command=self.__plus10)
self.__up25 = Button(frame, text='+25',
command=self.__plus25)
self.__down25.pack(expand=YES, fill=X, side=LEFT)
self.__down10.pack(expand=YES, fill=X, side=LEFT)
self.__down1.pack(expand=YES, fill=X, side=LEFT)
self.__up1.pack(expand=YES, fill=X, side=LEFT)
self.__up10.pack(expand=YES, fill=X, side=LEFT)
self.__up25.pack(expand=YES, fill=X, side=LEFT)
def __effect(self, event=None):
tie = self.__rvar.get() + self.__gvar.get() + self.__bvar.get()
if tie in (0, 1, 2, 4):
text = ''
else:
text = '(= %s Level)' % {3: 'Cyan',
5: 'Magenta',
6: 'Yellow',
7: 'Grey'}[tie]
self.__l2.configure(text=text)
def __quit(self, event=None):
self.__root.quit()
def __withdraw(self, event=None):
self.__root.withdraw()
def deiconify(self, event=None):
self.__root.deiconify()
def __minus25(self, event=None):
self.__delta(-25)
def __minus10(self, event=None):
self.__delta(-10)
def __minus1(self, event=None):
self.__delta(-1)
def __plus1(self, event=None):
self.__delta(1)
def __plus10(self, event=None):
self.__delta(10)
def __plus25(self, event=None):
self.__delta(25)
def __delta(self, delta):
tie = []
if self.__rvar.get():
red = self.__red + delta
tie.append(red)
else:
red = self.__red
if self.__gvar.get():
green = self.__green + delta
tie.append(green)
else:
green = self.__green
if self.__bvar.get():
blue = self.__blue + delta
tie.append(blue)
else:
blue = self.__blue
# now apply at boundary behavior
atbound = self.__boundvar.get()
if atbound == STOP:
if red < 0 or green < 0 or blue < 0 or \
red > 255 or green > 255 or blue > 255:
# then
red, green, blue = self.__red, self.__green, self.__blue
elif atbound == WRAP or (atbound == RATIO and len(tie) < 2):
if red < 0:
red = red + 256
if green < 0:
green = green + 256
if blue < 0:
blue = blue + 256
if red > 255:
red = red - 256
if green > 255:
green = green - 256
if blue > 255:
blue = blue - 256
elif atbound == RATIO:
# for when 2 or 3 colors are tied together
dir = 0
for c in tie:
if c < 0:
dir = -1
elif c > 255:
dir = 1
if dir == -1:
delta = max(tie)
if self.__rvar.get():
red = red + 255 - delta
if self.__gvar.get():
green = green + 255 - delta
if self.__bvar.get():
blue = blue + 255 - delta
elif dir == 1:
delta = min(tie)
if self.__rvar.get():
red = red - delta
if self.__gvar.get():
green = green - delta
if self.__bvar.get():
blue = blue - delta
elif atbound == GRAV:
if red < 0:
red = 0
if green < 0:
green = 0
if blue < 0:
blue = 0
if red > 255:
red = 255
if green > 255:
green = 255
if blue > 255:
blue = 255
self.__sb.update_views(red, green, blue)
self.__root.update_idletasks()
def update_yourself(self, red, green, blue):
self.__red = red
self.__green = green
self.__blue = blue
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