106 lines
2.5 KiB
Python
106 lines
2.5 KiB
Python
from Tkinter import *
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import Pmw
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import string
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class TypeinWidget(Pmw.MegaWidget):
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def __init__(self, parent=None, **kw):
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options = (('color', (128, 128, 128), self.__set_color),
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('delegate', None, None),
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)
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self.defineoptions(kw, options)
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Pmw.MegaWidget.__init__(self, parent)
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interiorarg = (self.interior(),)
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# create the x, y, and z label
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self.__x = self.createcomponent(
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'x', (), None,
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Pmw.EntryField, interiorarg,
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label_text='Red',
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label_width=5,
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label_anchor=E,
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labelpos=W,
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maxwidth=4,
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entry_width=4,
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validate=self.__validate,
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modifiedcommand=self.__modified)
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self.__x.grid(row=0, column=0)
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self.__y = self.createcomponent(
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'y', (), None,
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Pmw.EntryField, interiorarg,
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label_text='Green',
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label_width=5,
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label_anchor=E,
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labelpos=W,
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maxwidth=4,
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entry_width=4,
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validate=self.__validate,
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modifiedcommand=self.__modified)
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self.__y.grid(row=1, column=0)
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self.__z = self.createcomponent(
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'z', (), None,
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Pmw.EntryField, interiorarg,
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label_text='Blue',
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label_width=5,
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label_anchor=E,
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labelpos=W,
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maxwidth=4,
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entry_width=4,
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validate=self.__validate,
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modifiedcommand=self.__modified)
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self.__z.grid(row=2, column=0)
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# Check keywords and initialize options
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self.initialiseoptions(TypeinWidget)
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#
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# PUBLIC INTERFACE
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#
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def set_color(self, obj, rgbtuple):
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# break infloop
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red, green, blue = rgbtuple
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self.__x.setentry(`red`)
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self.__y.setentry(`green`)
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self.__z.setentry(`blue`)
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if obj == self:
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return
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#
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# PRIVATE INTERFACE
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#
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# called to validate the entry text
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def __str_to_int(self, text):
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try:
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if text[:2] == '0x':
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return string.atoi(text[2:], 16)
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else:
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return string.atoi(text)
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except:
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return None
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def __validate(self, text):
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val = self.__str_to_int(text)
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if (val is not None) and (val >= 0) and (val < 256):
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return 1
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else:
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return -1
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# called whenever a text entry is modified
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def __modified(self):
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# these are guaranteed to be valid, right?
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vals = map(lambda x: x.get(), (self.__x, self.__y, self.__z))
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rgbs = map(self.__str_to_int, vals)
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valids = map(self.__validate, vals)
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delegate = self['delegate']
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if (None not in rgbs) and (-1 not in valids) and delegate:
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delegate.set_color(self, rgbs)
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# called whenever the color option is changed
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def __set_color(self):
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rgbtuple = self['color']
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self.set_color(self, rgbtuple)
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