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91 lines
2.3 KiB
Python
91 lines
2.3 KiB
Python
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from Tkinter import *
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import Pmw
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class TypeinWidget(Pmw.MegaWidget):
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def __init__(self, parent=None, **kw):
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options = (('delegate', None, None),
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('color', (128, 128, 128), self.__set_color),
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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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labelpos=E,
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maxwidth=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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labelpos=E,
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maxwidth=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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labelpos=E,
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maxwidth=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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# TBD: gross hack, fix later
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self.__initializing = 1
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# Check keywords and initialize options
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self.initialiseoptions(TypeinWidget)
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# TBD: gross hack, fix later
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self.__initializing = 0
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# public set color interface
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def set_color(self, red, green, blue):
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self.__x.configure(label_text=`red`)
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self.__y.configure(label_text=`green`)
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self.__z.configure(label_text=`blue`)
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# dispatch to the delegate
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delegate = self['delegate']
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if delegate:
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delegate.set_color(red, green, blue)
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# called to validate the entry text
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SAFE_EVAL = {'__builtins__': {}}
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def __str_to_int(self, text):
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try:
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val = eval(text, self.SAFE_EVAL, {})
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return val
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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 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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red = self.__str_to_int(self.__x['value'])
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green = self.__str_to_int(self.__y['value'])
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blue = self.__str_to_int(self.__z['value'])
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self.set_color(red, green, blue)
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# called whenever the color option is changed
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def __set_color(self):
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red, green, blue = self['color']
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if not self.__initializing:
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self.set_color(red, green, blue)
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