cpython/Tools/pynche/PyncheWidget.py

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"""Main Pynche (Pythonically Natural Color and Hue Editor) widget.
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This window provides the basic decorations, primarily including the menubar.
It is used to bring up other windows.
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"""
from Tkinter import *
import tkMessageBox
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# Milliseconds between interrupt checks
KEEPALIVE_TIMER = 500
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class PyncheWidget:
def __init__(self, version, switchboard):
self.__sb = switchboard
self.__version = version
self.__textwin = None
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self.__listwin = None
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self.__detailswin = None
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#
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# Is there already a default root for Tk, say because we're running
# under Guido's IDE? :-) Two conditions say no, either the import
# fails or _default_root is None.
tkroot = None
try:
from Tkinter import _default_root
tkroot = self.__tkroot = _default_root
except ImportError:
pass
if not tkroot:
tkroot = self.__tkroot = Tk(className='Pynche')
# but this isn't our top level widget, so make it invisible
tkroot.withdraw()
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# create the menubar
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menubar = self.__menubar = Menu(tkroot)
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#
# File menu
#
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filemenu = self.__filemenu = Menu(menubar, tearoff=0)
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filemenu.add_command(label='Quit',
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command=tkroot.quit,
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accelerator='Alt-Q',
underline=0)
#
# View menu
#
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viewmenu = Menu(menubar, tearoff=0)
viewmenu.add_command(label='Text Window...',
command=self.__popup_text,
underline=0)
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viewmenu.add_command(label='Color List Window...',
command=self.__popup_listwin,
underline=0)
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viewmenu.add_command(label='Details Window...',
command=self.__popup_details,
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underline=0)
#
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# Help menu
#
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helpmenu = Menu(menubar, name='help', tearoff=0)
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helpmenu.add_command(label='About...',
command=self.__popup_about,
underline=0)
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#
# Tie them all together
#
menubar.add_cascade(label='File',
menu=filemenu,
underline=0)
menubar.add_cascade(label='View',
menu=viewmenu,
underline=0)
menubar.add_cascade(label='Help',
menu=helpmenu,
underline=0)
# now create the top level window
root = self.__root = Toplevel(tkroot, class_='Pynche', menu=menubar)
root.protocol('WM_DELETE_WINDOW', tkroot.quit)
root.title('Pynche %s' % version)
root.iconname('Pynche')
root.tk.createtimerhandler(KEEPALIVE_TIMER, self.__keepalive)
root.bind('<Alt-q>', tkroot.quit)
root.bind('<Alt-Q>', tkroot.quit)
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def __keepalive(self):
# Exercise the Python interpreter regularly so keyboard interrupts get
# through.
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self.__tkroot.tk.createtimerhandler(KEEPALIVE_TIMER, self.__keepalive)
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def start(self):
self.__keepalive()
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self.__tkroot.mainloop()
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def parent(self):
return self.__root
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def __popup_about(self, event=None):
from pynche import __version__
tkMessageBox.showinfo('About Pynche ' + __version__,
'''\
Pynche %s
The PYthonically Natural
Color and Hue Editor
Copyright (C) 1998
Barry A. Warsaw
All rights reserved
For information about Pynche
contact: Barry A. Warsaw
email: bwarsaw@python.org''' % __version__)
def __popup_text(self, event=None):
if not self.__textwin:
from TextViewer import TextViewer
self.__textwin = TextViewer(self.__sb, self.__root)
self.__sb.add_view(self.__textwin)
self.__textwin.deiconify()
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def __popup_listwin(self, event=None):
if not self.__listwin:
from ListViewer import ListViewer
self.__listwin = ListViewer(self.__sb, self.__root)
self.__sb.add_view(self.__listwin)
self.__listwin.deiconify()
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def __popup_details(self, event=None):
if not self.__detailswin:
from DetailsViewer import DetailsViewer
self.__detailswin = DetailsViewer(self.__sb, self.__root)
self.__sb.add_view(self.__detailswin)
self.__detailswin.deiconify()