The wxPython tutorial

Events in wxPythonhttp://www.zetcode.com/wxpython/events/Each widget has an id parameter. This is a unique number in theevent system. If we work with multiple widgets, we mustdifferantiate among them.wx.Button(parent, -1)wx.Button(parent, wx.ID_ANY)If we provide -1 or wx.ID_ANY for the id parameter, we let thewxPython automatically create an id for us. The automaticallycreated id's are always negative, whereas user specified id'smust always be positive. We usually use this option when we donot need to change the widget state. For example a static text,that will never be changed during the life of the application. Wecan still get the id, if we want. There is a method GetId(), whichwill determine the id for us.#!/usr/bin/python# automaticids.pyimport wxclass AuIds(wx.Frame):def __init__(self, parent, id, title):wx.Frame.__init__(self, parent, id, title, size=(170, 100))panel = wx.Panel(self, -1)exit = wx.Button(panel, -1, 'Exit', (10, 10))self.Bind(wx.EVT_BUTTON, self.OnExit, id=exit.GetId())self.Centre()self.Show(True)def OnExit(self, event):self.Close()app = wx.App()AuIds(None, -1, '')app.MainLoop()In this example, we do not care about the actual id value.self.Bind(wx.EVT_BUTTON, self.OnExit, id=exit.GetId())We get the automatically generated id by calling the GetId()method.7 de 14 27/04/2008 1:03