Initial revision

Tools/pynche/TypeinViewer.py

+from Tkinter import *
+import Pmw
+
+class TypeinWidget(Pmw.MegaWidget):
+    def __init__(self, parent=None, **kw):
+	options = (('delegate', None, None),
+		   ('color', (128, 128, 128), self.__set_color),
+		   )
+	self.defineoptions(kw, options)
+
+	Pmw.MegaWidget.__init__(self,parent)
+	interiorarg = (self.interior(),)
+
+	# create the x, y, and z label
+	self.__x = self.createcomponent(
+	    'x', (), None,
+	    Pmw.EntryField, interiorarg,
+	    label_text='Red',
+	    labelpos=E,
+	    maxwidth=4,
+	    validate=self.__validate,
+	    modifiedcommand=self.__modified)
+	self.__x.grid(row=0, column=0)
+
+	self.__y = self.createcomponent(
+	    'y', (), None,
+	    Pmw.EntryField, interiorarg,
+	    label_text='Green',
+	    labelpos=E,
+	    maxwidth=4,
+	    validate=self.__validate,
+	    modifiedcommand=self.__modified)
+	self.__y.grid(row=1, column=0)
+
+	self.__z = self.createcomponent(
+	    'z', (), None,
+	    Pmw.EntryField, interiorarg,
+	    label_text='Blue',
+	    labelpos=E,
+	    maxwidth=4,
+	    validate=self.__validate,
+	    modifiedcommand=self.__modified)
+	self.__z.grid(row=2, column=0)
+
+	# TBD: gross hack, fix later
+	self.__initializing = 1
+	# Check keywords and initialize options
+	self.initialiseoptions(TypeinWidget)
+	# TBD: gross hack, fix later
+	self.__initializing = 0
+
+    # public set color interface
+    def set_color(self, red, green, blue):
+	self.__x.configure(label_text=`red`)
+	self.__y.configure(label_text=`green`)
+	self.__z.configure(label_text=`blue`)
+	# dispatch to the delegate
+	delegate = self['delegate']
+	if delegate:
+	    delegate.set_color(red, green, blue)
+	    
+    # called to validate the entry text
+    SAFE_EVAL = {'__builtins__': {}}
+    def __str_to_int(self, text):
+	try:
+	    val = eval(text, self.SAFE_EVAL, {})
+	    return val
+	except:
+	    return None
+
+    def __validate(self, text):
+	val = self.__str_to_int(text)
+	if val and val >= 0 and val < 256:
+	    return 1
+	else:
+	    return -1
+
+    # called whenever a text entry is modified
+    def __modified(self):
+	# these are guaranteed to be valid, right?
+	red = self.__str_to_int(self.__x['value'])
+	green = self.__str_to_int(self.__y['value'])
+	blue = self.__str_to_int(self.__z['value'])
+	self.set_color(red, green, blue)
+
+    # called whenever the color option is changed
+    def __set_color(self):
+	red, green, blue = self['color']
+	if not self.__initializing:
+	    self.set_color(red, green, blue)