"""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
from Tkinter import *
import tkMessageBox
import tkFileDialog
import ColorDB
# Milliseconds between interrupt checks
KEEPALIVE_TIMER = 500
class PyncheWidget:
def __init__(self, version, switchboard, master=None, extrapath=[]):
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
#
views = make_view_popups(self.__sb, self.__tkroot, extrapath)
viewmenu = Menu(menubar, tearoff=0)
for v in views:
viewmenu.add_command(label=v.menutext(),
command=v.popup,
underline=v.underline())
#
# 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 __load(self, event=None):
while 1:
idir, ifile = os.path.split(self.__sb.colordb().filename())
file = tkFileDialog.askopenfilename(
filetypes=[('Text files', '*.txt'),
('All files', '*'),
],
initialdir=idir,
initialfile=ifile)
if not file:
# 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)
def withdraw(self):
self.__root.withdraw()
def deiconify(self):
self.__root.deiconify()
class Helpwin:
def __init__(self, master, quitfunc):
from Main import 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 = contents.rfind('\f')
if i > 0:
contents = contents[:i].rstrip()
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()
class PopupViewer:
def __init__(self, module, name, switchboard, root):
self.__m = module
self.__name = name
self.__sb = switchboard
self.__root = root
self.__menutext = module.ADDTOVIEW
# find the underline character
underline = module.ADDTOVIEW.find('%')
if underline == -1:
underline = 0
else:
self.__menutext = module.ADDTOVIEW.replace('%', '', 1)
self.__underline = underline
self.__window = None
def menutext(self):
return self.__menutext
def underline(self):
return self.__underline
def popup(self, event=None):
if not self.__window:
# class and module must have the same name
class_ = getattr(self.__m, self.__name)
self.__window = class_(self.__sb, self.__root)
self.__sb.add_view(self.__window)
self.__window.deiconify()
def __cmp__(self, other):
return cmp(self.__menutext, other.__menutext)
def make_view_popups(switchboard, root, extrapath):
viewers = []
# where we are in the file system
dirs = [os.path.dirname(__file__)] + extrapath
for dir in dirs:
if dir == '':
dir = '.'
for file in os.listdir(dir):
if file[-9:] == 'Viewer.py':
name = file[:-3]
try:
module = __import__(name)
except ImportError:
# Pynche is running from inside a package, so get the
# module using the explicit path.
pkg = __import__('pynche.'+name)
module = getattr(pkg, name)
if hasattr(module, 'ADDTOVIEW') and module.ADDTOVIEW:
# this is an external viewer
v = PopupViewer(module, name, switchboard, root)
viewers.append(v)
# sort alphabetically
viewers.sort()
return viewers
