[WxPython] [SOLVED] How to change button label?

[Winfried]

Hello,

I can't figure out how to change a button's label when clicking on it:

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import wx   class MyFrame(wx.Frame):        def __init__(self):         super().__init__(parent=None, title='Hello World')         panel = wx.Panel(self)                my_sizer = wx.BoxSizer(wx.VERTICAL)                  my_btn = wx.Button(panel, label='Press Me')         my_btn.Bind(wx.EVT_BUTTON, self.on_press)         my_sizer.Add(my_btn, 0, wx.ALL | wx.CENTER, 5)                panel.SetSizer(my_sizer)                self.Show()       def on_press(self, event):         #self.SetLabel("New Value")         #my_btn.SetLabel("blah")         #self.SetLabel(my_btn,"New Value")         self.SetLabel(self.my_btn,"New Value")   if __name__ == '__main__':     app = wx.App()     frame = MyFrame()     app.MainLoop()

Do I need some kind of refresh/redraw?

Thank you.

[Yoriz]

To be able to have a pointer to the button object in the event handler method on_press you need to add self. to the front of my_btn in the __init__ method.
Then you can use the buttons SetLabel method.

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import wx     class MyFrame(wx.Frame):     def __init__(self):         super().__init__(parent=None, title="Hello World")         panel = wx.Panel(self)         my_sizer = wx.BoxSizer(wx.VERTICAL)           self.my_btn = wx.Button(panel, label="Press Me")         self.my_btn.Bind(wx.EVT_BUTTON, self.on_press)         my_sizer.Add(self.my_btn, 0, wx.ALL | wx.CENTER, 5)         panel.SetSizer(my_sizer)         self.Show()       def on_press(self, event):         self.my_btn.SetLabel("New Value")     if __name__ == "__main__":     app = wx.App()     frame = MyFrame()     app.MainLoop()

[deanhystad]

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def on_press(self, event):     #self.SetLabel("New Value")  # Does not work because self is wxFrame, not a button     #my_btn.SetLabel("blah") # Does not work because my_btn only existed for a brief instant inside MyFrame.__init__()     #self.SetLabel(my_btn,"New Value")  # Does not work for many reasons.   Is trying to setLabel on a frame to a button     self.SetLabel(self.my_btn,"New Value") # Does not work because you never assign self.my_btn a value

As Yoriz says, to set the button label, you call SetLabel() for the button.

1 2	button = wxButton(parent) button.SetLabel("Button text goes here")

If you create the button in one method and set the label in another, you need to keep a handle to the button object. The easiest way to do this save the button object in an instance variable.

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method make_stuff(self):     panel = wx.Panel(self)  # Only use panel this one time.  No need to make instance variable     self.button = wxButton(panel, label="Initial Button Label")  # Will use button later, so make it an instance variable   method change_stuff(self):     self.button.SetLabel("New Button Label")  # This is the same button created in make_stuff()

[Winfried]

Thanks guys. Makes sense.