class HAL_SpinButton(gtk.SpinButton, _HalWidgetBase):
    __gtype_name__ = "HAL_SpinButton"

    def validate(self, *a):
        data = self.get_text()
        if data[-3:] == 'tpi':
            self.set_text(str(25.4/float(data[:-3])))
        elif data[-2:] == 'in':
            self.set_text(str(25.4*float(data[:-2])))
        elif data[-2:] == 'mm':
            self.set_text(str(float(data[:-2])/25.4))
        elif data[-5:] == 'pitch':
            self.set_text(str(25.4/float(data[:-5])))

    def hal_update(self, *a):
        data = self.get_value()
        self.hal_pin_f.set(float(data))
        self.hal_pin_s.set(int(data))

    def _hal_init(self):
        self.hal_pin_f = self.hal.newpin(self.hal_name+"-f", hal.HAL_FLOAT, hal.HAL_OUT)
        self.hal_pin_s = self.hal.newpin(self.hal_name+"-s", hal.HAL_S32, hal.HAL_OUT)
        self.connect("value-changed", self.hal_update)
        self.connect("changed", self.validate)
        self.emit("value-changed")