"""Dialog that allows user to specify a new config file section name.Used to get new highlight theme and keybinding set names."""from Tkinter import *import tkMessageBox class GetCfgSectionNameDialog(Toplevel):    def __init__(self,parent,title,message,usedNames):        """        message - string, informational message to display        usedNames - list, list of names already in use for validity check        """        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.message=message        self.usedNames=usedNames        self.result=''        self.CreateWidgets()        self.withdraw() #hide while setting geometry        self.update_idletasks()        #needs to be done here so that the winfo_reqwidth is valid        self.messageInfo.config(width=self.frameMain.winfo_reqwidth())        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)) )) ) #centre dialog over parent        self.deiconify() #geometry set, unhide        self.wait_window()     def CreateWidgets(self):        self.name=StringVar(self)        self.fontSize=StringVar(self)        self.frameMain = Frame(self,borderwidth=2,relief=SUNKEN)        self.frameMain.pack(side=TOP,expand=TRUE,fill=BOTH)        self.messageInfo=Message(self.frameMain,anchor=W,justify=LEFT,padx=5,pady=5,                text=self.message)#,aspect=200)        entryName=Entry(self.frameMain,textvariable=self.name,width=30)        entryName.focus_set()        self.messageInfo.pack(padx=5,pady=5)#,expand=TRUE,fill=BOTH)        entryName.pack(padx=5,pady=5)        frameButtons=Frame(self)        frameButtons.pack(side=BOTTOM,fill=X)        self.buttonOk = Button(frameButtons,text='Ok',                width=8,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 NameOk(self):        #simple validity check for a sensible        #ConfigParser file section name        nameOk=1        name=self.name.get()        name.strip()        if not name: #no name specified            tkMessageBox.showerror(title='Name Error',                    message='No name specified.', parent=self)            nameOk=0        elif len(name)>30: #name too long            tkMessageBox.showerror(title='Name Error',                    message='Name too long. It should be no more than '+                    '30 characters.', parent=self)            nameOk=0        elif name in self.usedNames:            tkMessageBox.showerror(title='Name Error',                    message='This name is already in use.', parent=self)            nameOk=0        return nameOk     def Ok(self, event=None):        if self.NameOk():            self.result=self.name.get().strip()            self.destroy()     def Cancel(self, event=None):        self.result=''        self.destroy() if __name__ == '__main__':    #test the dialog    root=Tk()    def run():        keySeq=''        dlg=GetCfgSectionNameDialog(root,'Get Name',                'The information here should need to be word wrapped. Test.')        print dlg.result    Button(root,text='Dialog',command=run).pack()    root.mainloop()