name : pyColorChooser.py """Color chooser implementing (almost) the tkColorColor interface """ import os import Main import ColorDB  class Chooser: """Ask for a color""" def __init__(self, master = None, databasefile = None, initfile = None, ignore = None, wantspec = None): self.__master = master self.__databasefile = databasefile self.__initfile = initfile or os.path.expanduser('~/.pynche') self.__ignore = ignore self.__pw = None self.__wantspec = wantspec def show(self, color, options): # scan for options that can override the ctor options self.__wantspec = options.get('wantspec', self.__wantspec) dbfile = options.get('databasefile', self.__databasefile) # load the database file colordb = None if dbfile <> self.__databasefile: colordb = ColorDB.get_colordb(dbfile) if not self.__master: from Tkinter import Tk self.__master = Tk() if not self.__pw: self.__pw, self.__sb = \ Main.build(master = self.__master, initfile = self.__initfile, ignore = self.__ignore) else: self.__pw.deiconify() # convert color if colordb: self.__sb.set_colordb(colordb) else: colordb = self.__sb.colordb() if color: r, g, b = Main.initial_color(color, colordb) self.__sb.update_views(r, g, b) # reset the canceled flag and run it self.__sb.canceled(0) Main.run(self.__pw, self.__sb) rgbtuple = self.__sb.current_rgb() self.__pw.withdraw() # check to see if the cancel button was pushed if self.__sb.canceled_p(): return None, None # Try to return the color name from the database if there is an exact # match, otherwise use the "#rrggbb" spec. BAW: Forget about color # aliases for now, maybe later we should return these too. name = None if not self.__wantspec: try: name = colordb.find_byrgb(rgbtuple)[0] except ColorDB.BadColor: pass if name is None: name = ColorDB.triplet_to_rrggbb(rgbtuple) return rgbtuple, name def save(self): if self.__sb: self.__sb.save_views()  # convenience stuff _chooser = None def askcolor(color = None, **options): """Ask for a color""" global _chooser if not _chooser: _chooser = apply(Chooser, (), options) return _chooser.show(color, options) def save(): global _chooser if _chooser: _chooser.save()  # test stuff if __name__ == '__main__': from Tkinter import * class Tester: def __init__(self): self.__root = tk = Tk() b = Button(tk, text='Choose Color...', command=self.__choose) b.pack() self.__l = Label(tk) self.__l.pack() q = Button(tk, text='Quit', command=self.__quit) q.pack() def __choose(self, event=None): rgb, name = askcolor(master=self.__root) if rgb is None: text = 'You hit CANCEL!' else: r, g, b = rgb text = 'You picked %s (%3d/%3d/%3d)' % (name, r, g, b) self.__l.configure(text=text) def __quit(self, event=None): self.__root.quit() def run(self): self.__root.mainloop() t = Tester() t.run() # simpler ## print 'color:', askcolor() ## print 'color:', askcolor()