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dynamically imported when Pynche is running via askcolor out of a package. If the ImportError occurs, try again, prepending the package name and digging out the module.
310 lines
10 KiB
Python
310 lines
10 KiB
Python
"""Main Pynche (Pythonically Natural Color and Hue Editor) widget.
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This window provides the basic decorations, primarily including the menubar.
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It is used to bring up other windows.
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"""
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import sys
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import os
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import string
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from Tkinter import *
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import tkMessageBox
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import tkFileDialog
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import ColorDB
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# Milliseconds between interrupt checks
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KEEPALIVE_TIMER = 500
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class PyncheWidget:
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def __init__(self, version, switchboard, master=None, extrapath=[]):
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self.__sb = switchboard
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self.__version = version
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self.__textwin = None
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self.__listwin = None
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self.__detailswin = None
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self.__helpwin = None
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self.__dialogstate = {}
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modal = self.__modal = not not master
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# If a master was given, we are running as a modal dialog servant to
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# some other application. We rearrange our UI in this case (there's
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# no File menu and we get `Okay' and `Cancel' buttons), and we do a
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# grab_set() to make ourselves modal
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if modal:
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self.__tkroot = tkroot = Toplevel(master, class_='Pynche')
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tkroot.grab_set()
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tkroot.withdraw()
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else:
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# Is there already a default root for Tk, say because we're
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# running under Guido's IDE? :-) Two conditions say no, either the
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# import fails or _default_root is None.
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tkroot = None
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try:
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from Tkinter import _default_root
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tkroot = self.__tkroot = _default_root
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except ImportError:
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pass
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if not tkroot:
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tkroot = self.__tkroot = Tk(className='Pynche')
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# but this isn't our top level widget, so make it invisible
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tkroot.withdraw()
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# create the menubar
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menubar = self.__menubar = Menu(tkroot)
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#
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# File menu
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#
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filemenu = self.__filemenu = Menu(menubar, tearoff=0)
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filemenu.add_command(label='Load palette...',
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command=self.__load,
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underline=0)
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if not modal:
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filemenu.add_command(label='Quit',
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command=self.__quit,
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accelerator='Alt-Q',
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underline=0)
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#
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# View menu
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#
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views = make_view_popups(self.__sb, self.__tkroot, extrapath)
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viewmenu = Menu(menubar, tearoff=0)
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for v in views:
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viewmenu.add_command(label=v.menutext(),
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command=v.popup,
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underline=v.underline())
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#
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# Help menu
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#
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helpmenu = Menu(menubar, name='help', tearoff=0)
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helpmenu.add_command(label='About Pynche...',
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command=self.__popup_about,
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underline=0)
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helpmenu.add_command(label='Help...',
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command=self.__popup_usage,
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underline=0)
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#
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# Tie them all together
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#
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menubar.add_cascade(label='File',
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menu=filemenu,
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underline=0)
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menubar.add_cascade(label='View',
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menu=viewmenu,
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underline=0)
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menubar.add_cascade(label='Help',
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menu=helpmenu,
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underline=0)
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# now create the top level window
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root = self.__root = Toplevel(tkroot, class_='Pynche', menu=menubar)
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root.protocol('WM_DELETE_WINDOW',
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modal and self.__bell or self.__quit)
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root.title('Pynche %s' % version)
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root.iconname('Pynche')
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# Only bind accelerators for the File->Quit menu item if running as a
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# standalone app
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if not modal:
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root.bind('<Alt-q>', self.__quit)
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root.bind('<Alt-Q>', self.__quit)
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else:
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# We're a modal dialog so we have a new row of buttons
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bframe = Frame(root, borderwidth=1, relief=RAISED)
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bframe.grid(row=4, column=0, columnspan=2,
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sticky='EW',
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ipady=5)
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okay = Button(bframe,
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text='Okay',
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command=self.__okay)
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okay.pack(side=LEFT, expand=1)
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cancel = Button(bframe,
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text='Cancel',
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command=self.__cancel)
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cancel.pack(side=LEFT, expand=1)
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def __quit(self, event=None):
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self.__tkroot.quit()
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def __bell(self, event=None):
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self.__tkroot.bell()
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def __okay(self, event=None):
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self.__sb.withdraw_views()
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self.__tkroot.grab_release()
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self.__quit()
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def __cancel(self, event=None):
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self.__sb.canceled()
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self.__okay()
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def __keepalive(self):
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# Exercise the Python interpreter regularly so keyboard interrupts get
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# through.
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self.__tkroot.tk.createtimerhandler(KEEPALIVE_TIMER, self.__keepalive)
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def start(self):
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if not self.__modal:
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self.__keepalive()
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self.__tkroot.mainloop()
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def window(self):
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return self.__root
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def __popup_about(self, event=None):
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from Main import __version__
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tkMessageBox.showinfo('About Pynche ' + __version__,
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'''\
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Pynche %s
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The PYthonically Natural
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Color and Hue Editor
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For information
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contact: Barry A. Warsaw
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email: bwarsaw@python.org''' % __version__)
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def __popup_usage(self, event=None):
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if not self.__helpwin:
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self.__helpwin = Helpwin(self.__root, self.__quit)
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self.__helpwin.deiconify()
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def __load(self, event=None):
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while 1:
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idir, ifile = os.path.split(self.__sb.colordb().filename())
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file = tkFileDialog.askopenfilename(
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filetypes=[('Text files', '*.txt'),
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('All files', '*'),
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],
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initialdir=idir,
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initialfile=ifile)
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if not file:
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# cancel button
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return
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try:
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colordb = ColorDB.get_colordb(file)
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except IOError:
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tkMessageBox.showerror('Read error', '''\
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Could not open file for reading:
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%s''' % file)
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continue
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if colordb is None:
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tkMessageBox.showerror('Unrecognized color file type', '''\
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Unrecognized color file type in file:
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%s''' % file)
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continue
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break
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self.__sb.set_colordb(colordb)
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def withdraw(self):
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self.__root.withdraw()
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def deiconify(self):
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self.__root.deiconify()
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class Helpwin:
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def __init__(self, master, quitfunc):
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from Main import __version__, docstring
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self.__root = root = Toplevel(master, class_='Pynche')
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root.protocol('WM_DELETE_WINDOW', self.__withdraw)
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root.title('Pynche Help Window')
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root.iconname('Pynche Help Window')
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root.bind('<Alt-q>', quitfunc)
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root.bind('<Alt-Q>', quitfunc)
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root.bind('<Alt-w>', self.__withdraw)
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root.bind('<Alt-W>', self.__withdraw)
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# more elaborate help is available in the README file
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readmefile = os.path.join(sys.path[0], 'README')
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try:
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fp = None
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try:
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fp = open(readmefile)
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contents = fp.read()
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# wax the last page, it contains Emacs cruft
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i = string.rfind(contents, '\f')
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if i > 0:
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contents = string.rstrip(contents[:i])
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finally:
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if fp:
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fp.close()
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except IOError:
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sys.stderr.write("Couldn't open Pynche's README, "
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'using docstring instead.\n')
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contents = docstring()
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self.__text = text = Text(root, relief=SUNKEN,
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width=80, height=24)
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self.__text.focus_set()
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text.insert(0.0, contents)
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scrollbar = Scrollbar(root)
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scrollbar.pack(fill=Y, side=RIGHT)
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text.pack(fill=BOTH, expand=YES)
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text.configure(yscrollcommand=(scrollbar, 'set'))
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scrollbar.configure(command=(text, 'yview'))
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def __withdraw(self, event=None):
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self.__root.withdraw()
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def deiconify(self):
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self.__root.deiconify()
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class PopupViewer:
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def __init__(self, module, name, switchboard, root):
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self.__m = module
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self.__name = name
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self.__sb = switchboard
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self.__root = root
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self.__menutext = module.ADDTOVIEW
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# find the underline character
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underline = string.find(module.ADDTOVIEW, '%')
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if underline == -1:
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underline = 0
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else:
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self.__menutext = string.replace(module.ADDTOVIEW, '%', '', 1)
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self.__underline = underline
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self.__window = None
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def menutext(self):
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return self.__menutext
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def underline(self):
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return self.__underline
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def popup(self, event=None):
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if not self.__window:
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# class and module must have the same name
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class_ = getattr(self.__m, self.__name)
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self.__window = class_(self.__sb, self.__root)
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self.__sb.add_view(self.__window)
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self.__window.deiconify()
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def __cmp__(self, other):
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return cmp(self.__menutext, other.__menutext)
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def make_view_popups(switchboard, root, extrapath):
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viewers = []
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# where we are in the file system
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dirs = [os.path.dirname(__file__)] + extrapath
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for dir in dirs:
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if dir == '':
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dir = '.'
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for file in os.listdir(dir):
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if file[-9:] == 'Viewer.py':
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name = file[:-3]
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try:
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module = __import__(name)
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except ImportError:
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# Pynche is running from inside a package, so get the
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# module using the explicit path.
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pkg = __import__('pynche.'+name)
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module = getattr(pkg, name)
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if hasattr(module, 'ADDTOVIEW') and module.ADDTOVIEW:
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# this is an external viewer
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v = PopupViewer(module, name, switchboard, root)
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viewers.append(v)
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# sort alphabetically
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viewers.sort()
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return viewers
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