wxPython – SetDefault() function in wx.Button

In this article we are going to learn about SetDefault() function associated with the wx.Button class of wxPython. This sets the button to be the default item in its top-level window (e.g. the panel or the dialog box containing it).
As normal, pressing return causes the default button to be depressed when the return key is pressed.

Syntax: wx.Button.SetDefault(self)

Parameters: No parameters

Return Type: wx.Window

Code Example:

import wx


class MyDialog(wx.Dialog):
    def __init__(self, parent, title):
        super(MyDialog, self).__init__(parent, title = title, size =(250, 175))
        panel = wx.Panel(self)
        self.btn = wx.Button(panel, wx.ID_OK, label ="Default",
                                  size =(50, 20), pos =(75, 50))
        self.btn1 = wx.Button(panel, wx.ID_OK, label ="Not Default",
                                     size =(90, 20), pos =(75, 100))


class Mywin(wx.Frame):

    def __init__(self, parent, title):
        super(Mywin, self).__init__(parent, title = title, size =(250, 150))
        self.InitUI()

    def InitUI(self):
        panel = wx.Panel(self)
        btn = wx.Button(panel, label ="Click", pos =(75, 10))
        btn.Bind(wx.EVT_BUTTON, self.OnModal)
        # SET BUTTON AS DEFAULT
        btn.SetDefault()

        self.SetMinSize((600, 400))
        self.Centre()
        self.Show(True)

    def OnModal(self, event):
        a = MyDialog(self, "Dialog").ShowModal()

ex = wx.App()
Mywin(None, 'Window')
ex.MainLoop()

Output Window: