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"""Main Pynche (Pythonically Natural Color and Hue Editor) widget.
This window provides the basic decorations, primarily including the menubar.
It is used to bring up other windows.
"""
import sys
import os
import string
from Tkinter import *
import tkMessageBox
# Milliseconds between interrupt checks
KEEPALIVE_TIMER = 500
class PyncheWidget:
def __init__(self, version, switchboard, master=None):
self.__sb = switchboard
self.__version = version
self.__textwin = None
self.__listwin = None
self.__detailswin = None
self.__helpwin = None
self.__dialogstate = {}
modal = self.__modal = not not master
# If a master was given, we are running as a modal dialog servant to
# some other application. We rearrange our UI in this case (there's
# no File menu and we get `Okay' and `Cancel' buttons), and we do a
# grab_set() to make ourselves modal
if modal:
self.__tkroot = tkroot = Toplevel(master, class_='Pynche')
tkroot.grab_set()
tkroot.withdraw()
else:
# 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()
# create the menubar
menubar = self.__menubar = Menu(tkroot)
#
# File menu
#
filemenu = self.__filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label='Load palette...',
command=self.__load,
underline=0)
if not modal:
filemenu.add_command(label='Quit',
command=self.__quit,
accelerator='Alt-Q',
underline=0)
#
# View menu
#
viewmenu = Menu(menubar, tearoff=0)
viewmenu.add_command(label='Text Window...',
command=self.__popup_text,
underline=0)
viewmenu.add_command(label='Color List Window...',
command=self.__popup_listwin,
underline=6)
viewmenu.add_command(label='Details Window...',
command=self.__popup_details,
underline=0)
#
# Help menu
#
helpmenu = Menu(menubar, name='help', tearoff=0)
helpmenu.add_command(label='About Pynche...',
command=self.__popup_about,
underline=0)
helpmenu.add_command(label='Help...',
command=self.__popup_usage,
underline=0)
#
# 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',
modal and self.__bell or self.__quit)
root.title('Pynche %s' % version)
root.iconname('Pynche')
# Only bind accelerators for the File->Quit menu item if running as a
# standalone app
if not modal:
root.bind('<Alt-q>', self.__quit)
root.bind('<Alt-Q>', self.__quit)
else:
# We're a modal dialog so we have a new row of buttons
bframe = Frame(root, borderwidth=1, relief=RAISED)
bframe.grid(row=4, column=0, columnspan=2,
sticky='EW',
ipady=5)
okay = Button(bframe,
text='Okay',
command=self.__okay)
okay.pack(side=LEFT, expand=1)
cancel = Button(bframe,
text='Cancel',
command=self.__cancel)
cancel.pack(side=LEFT, expand=1)
def __quit(self, event=None):
self.__tkroot.quit()
def __bell(self, event=None):
self.__tkroot.bell()
def __okay(self, event=None):
self.__sb.withdraw_views()
self.__tkroot.grab_release()
self.__quit()
def __cancel(self, event=None):
self.__sb.canceled()
self.__okay()
def __keepalive(self):
# Exercise the Python interpreter regularly so keyboard interrupts get
# through.
self.__tkroot.tk.createtimerhandler(KEEPALIVE_TIMER, self.__keepalive)
def start(self):
if not self.__modal:
self.__keepalive()
self.__tkroot.mainloop()
def window(self):
return self.__root
def __popup_about(self, event=None):
from Main import __version__
tkMessageBox.showinfo('About Pynche ' + __version__,
'''\
Pynche %s
The PYthonically Natural
Color and Hue Editor
For information
contact: Barry A. Warsaw
email: bwarsaw@python.org''' % __version__)
def __popup_usage(self, event=None):
if not self.__helpwin:
self.__helpwin = Helpwin(self.__root, self.__quit)
self.__helpwin.deiconify()
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()
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()
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()
def __load(self, event=None):
import FileDialog
import ColorDB
while 1:
d = FileDialog.FileDialog(self.__root)
file = d.go(pattern='*.txt', key=self.__dialogstate)
if file is None:
# cancel button
return
try:
colordb = ColorDB.get_colordb(file)
except IOError:
tkMessageBox.showerror('Read error', '''\
Could not open file for reading:
%s''' % file)
continue
if colordb is None:
tkMessageBox.showerror('Unrecognized color file type', '''\
Unrecognized color file type in file:
%s''' % file)
continue
break
self.__sb.set_colordb(colordb)
if self.__listwin:
self.__listwin.flush()
self.__sb.update_views_current()
def withdraw(self):
self.__root.withdraw()
def deiconify(self):
self.__root.deiconify()
class Helpwin:
def __init__(self, master, quitfunc):
from Main import __version__, docstring
self.__root = root = Toplevel(master, class_='Pynche')
root.protocol('WM_DELETE_WINDOW', self.__withdraw)
root.title('Pynche Help Window')
root.iconname('Pynche Help Window')
root.bind('<Alt-q>', quitfunc)
root.bind('<Alt-Q>', quitfunc)
root.bind('<Alt-w>', self.__withdraw)
root.bind('<Alt-W>', self.__withdraw)
# more elaborate help is available in the README file
readmefile = os.path.join(sys.path[0], 'README')
try:
fp = None
try:
fp = open(readmefile)
contents = fp.read()
# wax the last page, it contains Emacs cruft
i = string.rfind(contents, '\f')
if i > 0:
contents = string.rstrip(contents[:i])
finally:
if fp:
fp.close()
except IOError:
sys.stderr.write("Couldn't open Pynche's README, "
'using docstring instead.\n')
contents = docstring()
self.__text = text = Text(root, relief=SUNKEN,
width=80, height=24)
self.__text.focus_set()
text.insert(0.0, contents)
scrollbar = Scrollbar(root)
scrollbar.pack(fill=Y, side=RIGHT)
text.pack(fill=BOTH, expand=YES)
text.configure(yscrollcommand=(scrollbar, 'set'))
scrollbar.configure(command=(text, 'yview'))
def __withdraw(self, event=None):
self.__root.withdraw()
def deiconify(self):
self.__root.deiconify()
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