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Edit File: PyncheWidget.py

"""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