wxPython: Window and Event Id's

Question

I have a Panel on which I display a StaticBitmap initialised with an id of 2. When I bind a mouse event to the image and call GetId() on the event, it returns -202. Why?

import wx

class MyFrame(wx.Frame):

    def __init__(self, parent, id=-1):

        wx.Frame.__init__(self,parent,id)

        self.panel = wx.Panel(self,wx.ID_ANY)

        img = wx.Image("img1.png",wx.BITMAP_TYPE_ANY)
        img2 = wx.StaticBitmap(self.panel,2,wx.BitmapFromImage(img))
        print img2.GetId() # prints 2

        img2.Bind(wx.EVT_LEFT_DOWN,self.OnDClick)

    def OnDClick(self, event):

        print event.GetId() # prints -202

if __name__ == "__main__":

    app = wx.PySimpleApp()
    frame = MyFrame(None)
    frame.Show()
    app.MainLoop()

Answer 1

You're printing the event's ID, not the bitmap's ID.

Try print event.GetEventObject().GetId()

GetEventObject returns the widget associated with the event, in this case, the StaticBitmap .

FWIW, I've never needed to assign ID's to any widgets, and you probably shouldn't need to either.

Edit : I saw some other questions you asked and this is what I would recommend, especially if GetEventObject is returning the parent instead (I'm very surprised if that's true, you should double check):

import functools

widget1.Bind(wx.EVT_LEFT_DOWN, functools.partial(self.on_left_down, widget=widget1))
widget2.Bind(wx.EVT_LEFT_DOWN, functools.partial(self.on_left_down, widget=widget2))
# or the above could be in a loop, creating lots of widgets

def on_left_down(self, event, widget):
    # widget is the one that was clicked
    # event is still the wx event
    # handle the event here...