"Dialog to specify or edit the parameters for a user configured help source." import osimport sys from Tkinter import *import tkMessageBoximport tkFileDialog class GetHelpSourceDialog(Toplevel):    def __init__(self, parent, title, menuItem='', filePath=''):        """Get menu entry and url/ local file location for Additional Help         User selects a name for the Help resource and provides a web url        or a local file as its source.  The user can enter a url or browse        for the file.         """        Toplevel.__init__(self, parent)        self.configure(borderwidth=5)        self.resizable(height=FALSE, width=FALSE)        self.title(title)        self.transient(parent)        self.grab_set()        self.protocol("WM_DELETE_WINDOW", self.Cancel)        self.parent = parent        self.result = None        self.CreateWidgets()        self.menu.set(menuItem)        self.path.set(filePath)        self.withdraw() #hide while setting geometry        #needs to be done here so that the winfo_reqwidth is valid        self.update_idletasks()        #centre dialog over parent:        self.geometry("+%d+%d" %                      ((parent.winfo_rootx() + ((parent.winfo_width()/2)                                                -(self.winfo_reqwidth()/2)),                        parent.winfo_rooty() + ((parent.winfo_height()/2)                                                -(self.winfo_reqheight()/2)))))        self.deiconify() #geometry set, unhide        self.bind('<Return>', self.Ok)        self.wait_window()     def CreateWidgets(self):        self.menu = StringVar(self)        self.path = StringVar(self)        self.fontSize = StringVar(self)        self.frameMain = Frame(self, borderwidth=2, relief=GROOVE)        self.frameMain.pack(side=TOP, expand=TRUE, fill=BOTH)        labelMenu = Label(self.frameMain, anchor=W, justify=LEFT,                          text='Menu Item:')        self.entryMenu = Entry(self.frameMain, textvariable=self.menu,                               width=30)        self.entryMenu.focus_set()        labelPath = Label(self.frameMain, anchor=W, justify=LEFT,                          text='Help File Path: Enter URL or browse for file')        self.entryPath = Entry(self.frameMain, textvariable=self.path,                               width=40)        self.entryMenu.focus_set()        labelMenu.pack(anchor=W, padx=5, pady=3)        self.entryMenu.pack(anchor=W, padx=5, pady=3)        labelPath.pack(anchor=W, padx=5, pady=3)        self.entryPath.pack(anchor=W, padx=5, pady=3)        browseButton = Button(self.frameMain, text='Browse', width=8,                              command=self.browseFile)        browseButton.pack(pady=3)        frameButtons = Frame(self)        frameButtons.pack(side=BOTTOM, fill=X)        self.buttonOk = Button(frameButtons, text='OK',                               width=8, default=ACTIVE,  command=self.Ok)        self.buttonOk.grid(row=0, column=0, padx=5,pady=5)        self.buttonCancel = Button(frameButtons, text='Cancel',                                   width=8, command=self.Cancel)        self.buttonCancel.grid(row=0, column=1, padx=5, pady=5)     def browseFile(self):        filetypes = [            ("HTML Files", "*.htm *.html", "TEXT"),            ("PDF Files", "*.pdf", "TEXT"),            ("Windows Help Files", "*.chm"),            ("Text Files", "*.txt", "TEXT"),            ("All Files", "*")]        path = self.path.get()        if path:            dir, base = os.path.split(path)        else:            base = None            if sys.platform[:3] == 'win':                dir = os.path.join(os.path.dirname(sys.executable), 'Doc')                if not os.path.isdir(dir):                    dir = os.getcwd()            else:                dir = os.getcwd()        opendialog = tkFileDialog.Open(parent=self, filetypes=filetypes)        file = opendialog.show(initialdir=dir, initialfile=base)        if file:            self.path.set(file)     def MenuOk(self):        "Simple validity check for a sensible menu item name"        menuOk = True        menu = self.menu.get()        menu.strip()        if not menu:            tkMessageBox.showerror(title='Menu Item Error',                                   message='No menu item specified',                                   parent=self)            self.entryMenu.focus_set()            menuOk = False        elif len(menu) > 30:            tkMessageBox.showerror(title='Menu Item Error',                                   message='Menu item too long:'                                           '\nLimit 30 characters.',                                   parent=self)            self.entryMenu.focus_set()            menuOk = False        return menuOk     def PathOk(self):        "Simple validity check for menu file path"        pathOk = True        path = self.path.get()        path.strip()        if not path: #no path specified            tkMessageBox.showerror(title='File Path Error',                                   message='No help file path specified.',                                   parent=self)            self.entryPath.focus_set()            pathOk = False        elif path.startswith(('www.', 'http')):            pass        else:            if path[:5] == 'file:':                path = path[5:]            if not os.path.exists(path):                tkMessageBox.showerror(title='File Path Error',                                       message='Help file path does not exist.',                                       parent=self)                self.entryPath.focus_set()                pathOk = False        return pathOk     def Ok(self, event=None):        if self.MenuOk() and self.PathOk():            self.result = (self.menu.get().strip(),                           self.path.get().strip())            if sys.platform == 'darwin':                path = self.result[1]                if path.startswith(('www', 'file:', 'http:')):                    pass                else:                    # Mac Safari insists on using the URI form for local files                    self.result = list(self.result)                    self.result[1] = "file://" + path            self.destroy()     def Cancel(self, event=None):        self.result = None        self.destroy() if __name__ == '__main__':    #test the dialog    root = Tk()    def run():        keySeq = ''        dlg = GetHelpSourceDialog(root, 'Get Help Source')        print dlg.result    Button(root,text='Dialog', command=run).pack()    root.mainloop()