def handleEvent(self, event):
        if event.type() == QEvent.MouseButtonPress:
            ex, ey = self._normalizeCoordinates(event.windowPos().x(), event.windowPos().y())
            e = MouseEvent(MouseEvent.MousePressEvent, ex, ey, self._x, self._y, self._qtButtonsToButtonList(event.buttons()))
            self._x = ex
            self._y = ey
            self.event.emit(e)
        elif event.type() == QEvent.MouseMove:
            ex, ey = self._normalizeCoordinates(event.windowPos().x(), event.windowPos().y())
            e = MouseEvent(MouseEvent.MouseMoveEvent, ex, ey, self._x, self._y, self._qtButtonsToButtonList(event.buttons()))
            self._x = ex
            self._y = ey
            self.event.emit(e)
        elif event.type() == QEvent.MouseButtonRelease:
            ex, ey = self._normalizeCoordinates(event.windowPos().x(), event.windowPos().y())
            e = MouseEvent(MouseEvent.MouseReleaseEvent, ex, ey, self._x, self._y, self._qtButtonsToButtonList(event.button()))
            self._x = ex
            self._y = ey
            self.event.emit(e)
        elif event.type() == QEvent.Wheel:
            delta = event.angleDelta()
            e = WheelEvent(delta.x(), delta.y())
            self.event.emit(e) 

def __init__(self, tab, *, parent=None):
        super().__init__(parent)
        self._tab = tab
        self._handlers = {
            QEvent.MouseButtonPress: self._handle_mouse_press,
            QEvent.MouseButtonRelease: self._handle_mouse_release,
            QEvent.Wheel: self._handle_wheel,
            QEvent.KeyRelease: self._handle_key_release,
        }
        self._ignore_wheel_event = False
        self._check_insertmode_on_release = False 

def eventFilter(self, obj, event):
        if event.type() == QEvent.Wheel and 'SpinBox' in str(obj):
            return True

        return False 

def eventFilter(self, source, evt):
    t = evt.type()
    if t == QEvent.Wheel:
      self.new_entry_flag = True
      self.mouse_scroll_event(evt)
      return True
    elif t == QEvent.KeyPress:
      self.new_entry_flag = True
      if evt.key() == QtCore.Qt.Key_Return:
        self.update_entry(evt)
        return True
    return False 

def eventFilter(self, source, evt):
    t = evt.type()
    if t == QEvent.Wheel:
      self.mouse_scroll_event(evt)
      return True
    elif t == QEvent.ContextMenu:
      self.parent.erase_digits_to_right(self)
      self.reset_color()
      return True
    return False 

def eventFilter(self, object, evt):
    if evt.type() == QEvent.Wheel:
      self.bias += (-4,4)[evt.angleDelta().y() > 0]
    return False 

def eventFilter(self, source, evt):
    t = evt.type()
    if t == QEvent.Wheel:
      v = (-5,5)[evt.angleDelta().y() > 0]
      pos = self.obj.value() + v
      pos = self.limit_range(pos)
      self.obj.setValue(pos)
      self.config[self.config_name] = pos
      return True
    return False