SpinCtrl events problem

[mardif]

Hi,

I've a problem with wx.SpinCtrl
Here we go with my source code:

import wx
import traceback

class TextPage(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "")

        box = wx.BoxSizer(wx.VERTICAL)

        self.spin = wx.SpinCtrl(self, -1)

        box.Add(self.spin)

        self.SetSizer(box)

        wx.EVT_SPINCTRL(self, self.spin.GetId(), self.spinCtrlEvent )

        self.CenterOnScreen()

    def spinCtrlEvent(self, evt):

            pass
            print "ALL RIGHT"

if __name__ == "__main__":
    app = wx.PySimpleApp(0)
    p = TextPage()
    p.Show()
    app.MainLoop()

Now, my problem is the increment/decrement of self.spin value.
The SpinCtrl object increment/decrement 1 unit at time.
I must increment/decrement "n" unit at time, ex: 5,10,15,20....

I've tried:

    def __init__(self):
               ........
               ........
               self.old_quantity = 0

    def spinCtrlEvent(self, evt):

          if ( evt.GetInt() > self.old_quantity ):
                   qta = self.old_quantity + 5
          else:
                   qta = self.old_quantity - 5

          self.old_quantity = qta
          self.spin.SetValue( qta )

But here the process it goes in loop, because the SetValue SpinCtrl
method regenerates the EVT_SPINCTRL event

Any idea?
Thanks very much