python : How to remove focus from button when click anywhere on window

Question

我正在使用 python-2.7 和 kivy 。当我运行 test.py 然后我设置 focus在 button 上。之后我使用鼠标单击窗口上的任意位置，然后焦点不会移除。因为在点击窗口后我按下 enter 然后它调用 def self.add()。
谁能告诉我如何在点击
上的任意位置时从按钮上移除 焦点窗口？

测试.py

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.core.window import Window
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import StringProperty, ObjectProperty
from kivy.clock import Clock

Window.clearcolor = (0.5, 0.5, 0.5, 1)
Window.size = (500, 150)


class User(Screen):
    name = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(User, self).__init__(**kwargs)
        Window.bind(on_key_down=self._on_keyboard_down)
        Clock.schedule_once(self.name_focus, 1)

    def name_focus(self, *args):
        self.postUser.focus = True
        self.postUser.background_color = [0.5, 0.5, 0.5, 1]


    def _on_keyboard_down(self, instance, keyboard, keycode, text, modifiers):
        if (hasattr(self.postUser, 'focus') and self.postUser.focus) and keycode == 40:
            self.add()

    def add(self):
        print('button Event Call')


class Test(App):

    def build(self):
        return self.root


if __name__ == '__main__':
    Test().run()

测试.kv

#:kivy 1.10.0

User:
    name: name
    postUser : postUser
    BoxLayout:
        orientation: "vertical"
        GridLayout:
            cols: 2
            padding: 20, 20
            spacing: 10, 10

            Label:
                text: "Name"
                text_size: self.size
                valign: 'middle'
            TextInput:
                id:name
                text_size: self.size
        GridLayout:
            cols: 2
            padding: 0, 0
            spacing: 5, 0
            size_hint: .5, .35
            pos_hint: {'x': .25, 'y': 0}

            Button:
                id:postUser
                size_hint_x: .5
                text: "Ok"
                focus: False
                on_release:
                    root.add()

Answer 1

您可以在User 类中添加on_touch_up 方法。

def on_touch_up(self, touch):
    if (hasattr(self.postUser, 'focus') and self.postUser.focus):
        self.postUser.focus = False
        self.postUser.background_color = [1, 1, 1, 1]

我正在发布完整的代码。

测试.py

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.core.window import Window
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import StringProperty, ObjectProperty
from kivy.clock import Clock

Window.clearcolor = (0.5, 0.5, 0.5, 1)
Window.size = (500, 150)


class User(Screen):
    name = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(User, self).__init__(**kwargs)
        Window.bind(on_key_down=self._on_keyboard_down)
        Clock.schedule_once(self.name_focus, 1)

    def name_focus(self, *args):
        self.postUser.focus = True
        self.postUser.background_color = [0.5, 0.5, 0.5, 1]


    def _on_keyboard_down(self, instance, keyboard, keycode, text, modifiers):
        if (hasattr(self.postUser, 'focus') and self.postUser.focus) and keycode == 40:
            self.add()

    def add(self):
        print('button Event Call')

    def on_touch_up(self, touch):
        if (hasattr(self.postUser, 'focus') and self.postUser.focus):
            self.postUser.focus = False
            self.postUser.background_color = [1, 1, 1, 1]


class Test(App):

    def build(self):
        return self.root


if __name__ == '__main__':
    Test().run()

测试.kv

#:kivy 1.10.0

User:
    name: name
    postUser : postUser
    BoxLayout:
        orientation: "vertical"
        GridLayout:
            cols: 2
            padding: 20, 20
            spacing: 10, 10

            Label:
                text: "Name"
                text_size: self.size
                valign: 'middle'
            TextInput:
                id:name
                text_size: self.size
        GridLayout:
            cols: 2
            padding: 0, 0
            spacing: 5, 0
            size_hint: .5, .35
            pos_hint: {'x': .25, 'y': 0}

            Button:
                id:postUser
                size_hint_x: .5
                text: "Ok"
                focus: False
                on_release:
                    root.add()