dialog_elements.py 文件源码

def validate(self):
        """
        Validates the input. Returns ``True`` unless the field is blank and
        *optional* is ``False``.
        """
        if not self.enabled:
            return True
        elif not self.optional and len(self.value.get()) == 0:
            tkMessageBox.showwarning("", "{} not specified.".format(self.text))
            return False
        else:
            return True