"""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 sysimport osfrom Tkinter import *import tkMessageBoximport tkFileDialogimport ColorDB # Milliseconds between interrupt checksKEEPALIVE_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 %sThe PYthonically NaturalColor and Hue Editor For informationcontact: Barry A. Warsawemail:   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