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"""TypeinViewer class.
The TypeinViewer is what you see at the lower right of the main Pynche
widget. It contains three text entry fields, one each for red, green, blue.
Input into these windows is highly constrained; it only allows you to enter
values that are legal for a color axis. This usually means 0-255 for decimal
input and 0x0 - 0xff for hex input.
You can toggle whether you want to view and input the values in either decimal
or hex by clicking on Hexadecimal. By clicking on Update while typing, the
color selection will be made on every change to the text field. Otherwise,
you must hit Return or Tab to select the color.
"""
from Tkinter import *
class TypeinViewer:
def __init__(self, switchboard, master=None):
# non-gui ivars
self.__sb = switchboard
optiondb = switchboard.optiondb()
self.__hexp = BooleanVar()
self.__hexp.set(optiondb.get('HEXTYPE', 0))
self.__uwtyping = BooleanVar()
self.__uwtyping.set(optiondb.get('UPWHILETYPE', 0))
# create the gui
self.__frame = Frame(master, relief=RAISED, borderwidth=1)
self.__frame.grid(row=3, column=1, sticky='NSEW')
# Red
self.__xl = Label(self.__frame, text='Red:')
self.__xl.grid(row=0, column=0, sticky=E)
subframe = Frame(self.__frame)
subframe.grid(row=0, column=1)
self.__xox = Label(subframe, text='0x')
self.__xox.grid(row=0, column=0, sticky=E)
self.__xox['font'] = 'courier'
self.__x = Entry(subframe, width=3)
self.__x.grid(row=0, column=1)
self.__x.bindtags(self.__x.bindtags() + ('Normalize', 'Update'))
self.__x.bind_class('Normalize', '<Key>', self.__normalize)
self.__x.bind_class('Update' , '<Key>', self.__maybeupdate)
# Green
self.__yl = Label(self.__frame, text='Green:')
self.__yl.grid(row=1, column=0, sticky=E)
subframe = Frame(self.__frame)
subframe.grid(row=1, column=1)
self.__yox = Label(subframe, text='0x')
self.__yox.grid(row=0, column=0, sticky=E)
self.__yox['font'] = 'courier'
self.__y = Entry(subframe, width=3)
self.__y.grid(row=0, column=1)
self.__y.bindtags(self.__y.bindtags() + ('Normalize', 'Update'))
# Blue
self.__zl = Label(self.__frame, text='Blue:')
self.__zl.grid(row=2, column=0, sticky=E)
subframe = Frame(self.__frame)
subframe.grid(row=2, column=1)
self.__zox = Label(subframe, text='0x')
self.__zox.grid(row=0, column=0, sticky=E)
self.__zox['font'] = 'courier'
self.__z = Entry(subframe, width=3)
self.__z.grid(row=0, column=1)
self.__z.bindtags(self.__z.bindtags() + ('Normalize', 'Update'))
# Update while typing?
self.__uwt = Checkbutton(self.__frame,
text='Update while typing',
variable=self.__uwtyping)
self.__uwt.grid(row=3, column=0, columnspan=2, sticky=W)
# Hex/Dec
self.__hex = Checkbutton(self.__frame,
text='Hexadecimal',
variable=self.__hexp,
command=self.__togglehex)
self.__hex.grid(row=4, column=0, columnspan=2, sticky=W)
def __togglehex(self, event=None):
red, green, blue = self.__sb.current_rgb()
if self.__hexp.get():
label = '0x'
else:
label = ' '
self.__xox['text'] = label
self.__yox['text'] = label
self.__zox['text'] = label
self.update_yourself(red, green, blue)
def __normalize(self, event=None):
ew = event.widget
contents = ew.get()
icursor = ew.index(INSERT)
if contents and contents[0] in 'xX' and self.__hexp.get():
contents = '0' + contents
# Figure out the contents in the current base.
try:
if self.__hexp.get():
v = int(contents, 16)
else:
v = int(contents)
except ValueError:
v = None
# If value is not legal, or empty, delete the last character inserted
# and ring the bell. Don't ring the bell if the field is empty (it'll
# just equal zero.
if v is None:
pass
elif v < 0 or v > 255:
i = ew.index(INSERT)
if event.char:
contents = contents[:i-1] + contents[i:]
icursor -= 1
ew.bell()
elif self.__hexp.get():
contents = hex(v)[2:]
else:
contents = int(v)
ew.delete(0, END)
ew.insert(0, contents)
ew.icursor(icursor)
def __maybeupdate(self, event=None):
if self.__uwtyping.get() or event.keysym in ('Return', 'Tab'):
self.__update(event)
def __update(self, event=None):
redstr = self.__x.get() or '0'
greenstr = self.__y.get() or '0'
bluestr = self.__z.get() or '0'
if self.__hexp.get():
base = 16
else:
base = 10
red, green, blue = [int(x, base) for x in (redstr, greenstr, bluestr)]
self.__sb.update_views(red, green, blue)
def update_yourself(self, red, green, blue):
if self.__hexp.get():
sred, sgreen, sblue = [hex(x)[2:] for x in (red, green, blue)]
else:
sred, sgreen, sblue = red, green, blue
x, y, z = self.__x, self.__y, self.__z
xicursor = x.index(INSERT)
yicursor = y.index(INSERT)
zicursor = z.index(INSERT)
x.delete(0, END)
y.delete(0, END)
z.delete(0, END)
x.insert(0, sred)
y.insert(0, sgreen)
z.insert(0, sblue)
x.icursor(xicursor)
y.icursor(yicursor)
z.icursor(zicursor)
def hexp_var(self):
return self.__hexp
def save_options(self, optiondb):
optiondb['HEXTYPE'] = self.__hexp.get()
optiondb['UPWHILETYPE'] = self.__uwtyping.get()
........