focus.py 文件源码

def __init__(self, **kwargs):
        self.register_event_type('on_focus_textinput')
        super(FocusBehavior, self).__init__(**kwargs)
        self.fbind('focus', self.remove_other_focused)
        self.fbind('is_focusable', self.update_is_focusable)
        if not self.is_subfocus:
            self.bind(parent=on_parent)
            if self.grab_focus and self.is_focusable:
                self.focus_widget(self)