Is it possible to limit TextCtrl to accept numbers only in wxPython?

Question

I want to have a text control that only accepts numbers. (Just integer values like 45 or 366)

What is the best way to do this?

Answer 1

IntCtrl, Masked Edit Control, and NumCtrl are all designed to do just this, with different levels of control. Checkout the wx demo under "More Windows/Controls" to see how they work.

(Or, if you're instead really looking forward to doing this directly with a raw TextCtrl, I think you'd want to catch EVT_CHAR events, test the characters, and call evt.Skip() if it was an allowed character.)

Answer 2

I had to do something similar, checking for alphanumeric codes. The tip on EVT_CHAR was the right thing:

class TestPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent, -1)
        self.entry = wx.TextCtrl(self, -1)
        self.entry.Bind(wx.EVT_CHAR, self.handle_keypress)

    def handle_keypress(self, event):
        keycode = event.GetKeyCode()
        if keycode < 255:
            # valid ASCII
            if chr(keycode).isalnum():
                # Valid alphanumeric character
                event.Skip()