The wxPython tutorial

http://www.zetcode.com/wxpython/tips/accordingly. If there is nothing to undo, the undo button isdisabled.a = stockUndo.pop()if len(stockUndo) == 0:self.toolbar.EnableTool(ID_UNDO, False)a.undo()stockRedo.append(a)If we click undo, we pop up an UndoText object from thestockUndo list. Call the undo() method and append theobject to the stockRedo list.Configuring application settingsMany applications allow users to configure their settings.Users can toggle tooltips on and of, change fonts, defaultdownload paths etc. Mostly they have a menu option calledpreferences. Application settings are saved to the hard disk,so that users do not have to change the settings each timethe application starts.In wxPython we have wx.Config class to do our job.On Linux, settings are stored in a simple hidden file. Thisfile is located in the home user directory by default. Thelocation of the configuration file can be changed. The nameof the file is specified in the constructor of the wx.Configclass. In the following code example, we can cofigure thesize of the window. If there is no configuration file, theheight and the width of the window is set to the defaul 250px value. We can set these values to a range from 200 -500px. After we save our values and restart the application,the window size is set to our preffered values.#!/usr/bin/python# myconfig.pyimport wxclass MyConfig(wx.Frame):11 de 15 27/04/2008 1:09