def onMouseMove(self, sender, x, y):
        if not self.dragging:
            return
        absX = x + self.getAbsoluteLeft()
        absY = y + self.getAbsoluteTop()
        self.setPopupPosition(self.dragStartX - absX,
                              absY - self.dragStartY)
dataset/ETHPy150Open anandology/pyjamas/library/gwt/ui/DialogBox.py/DialogBox.onMouseMove/swapped operands of `-`