PassArgsToCallback.py

#!/usr/bin/env python

import wx


class MyFrame(wx.Frame):
    def __init__(self, *args, **kwargs):
        wx.Frame.__init__(self, *args, **kwargs)
        self.SetBackgroundColour(wx.WHITE)

        NumButtons = 6

        MainSizer = wx.BoxSizer(wx.HORIZONTAL)

        ## The lambda trick:
        ButtonSizer = wx.StaticBoxSizer(wx.StaticBox(self,label="lambda trick"),
                                        wx.VERTICAL)
        bdr = 10
        for i in range(NumButtons):
            b = wx.Button(self, label=str(i))
            b.Bind(wx.EVT_BUTTON, lambda evt, num=i: self.OnClick(evt, num))
            ButtonSizer.Add(b, 0, wx.EXPAND | wx.ALL, bdr)
        MainSizer.Add(ButtonSizer, 0, wx.ALL, bdr)

        ## Using the label:
        ButtonSizer = wx.StaticBoxSizer(wx.StaticBox(self,label="Using the label"),
                                        wx.VERTICAL)
        for i in range(NumButtons):
            b = wx.Button(self, label=str(i))
            b.Bind(wx.EVT_BUTTON, self.OnClick2)
            ButtonSizer.Add(b, 0, wx.EXPAND | wx.ALL, bdr)
        MainSizer.Add(ButtonSizer, 0, wx.ALL, bdr)

        ## Storing the ID:
        ButtonSizer = wx.StaticBoxSizer(wx.StaticBox(self,label="Storing the ID"),
                                        wx.VERTICAL)
        self.ButtonIDs = {}
        for i in range(NumButtons):
            b = wx.Button(self, label=str(i))
            self.ButtonIDs[b.Id] = i
            b.Bind(wx.EVT_BUTTON, self.OnClick3)
            ButtonSizer.Add(b, 0, wx.EXPAND | wx.ALL, bdr)
        MainSizer.Add(ButtonSizer, 0, wx.ALL, bdr)

        ## Using FindWinowById():
        ButtonSizer = wx.StaticBoxSizer(wx.StaticBox(self,label="FindWinowById()"),
                                        wx.VERTICAL)
        for i in range(NumButtons):
            b = wx.Button(self, label=str(i))
            b.Bind(wx.EVT_BUTTON, self.OnClick4)
            # add an arbitrary attribute
            b.myData = "This is button %i" %i
            ButtonSizer.Add(b, 0, wx.EXPAND | wx.ALL, bdr)
        MainSizer.Add(ButtonSizer, 0, wx.ALL, bdr)

        self.SetSizerAndFit(MainSizer)
        sz = self.GetSize()
        self.SetSizeHints(sz[0], sz[1], sz[0], sz[1])

    def OnClick(self, evt, num):
        print("Button %i Clicked" %num)

    def OnClick2(self, evt):
        but = evt.GetEventObject()
        print("Button %s Clicked" %but.Label)

    def OnClick3(self, evt):
        but = self.ButtonIDs[evt.Id]
        print("Button %s Clicked" %but)

    def OnClick4(self, evt):
        but = wx.FindWindowById(evt.Id)
        print("Button %s Clicked" %but.myData)


if __name__ == '__main__':
    App = wx.App(False)
    F = MyFrame(None, title="Test Frame")
    F.Show()
    App.MainLoop()