Python：单击窗口上的任意位置时如何从按钮上移除焦点

Question

我正在使用python-2.7 和kivy。当我运行test.py 时，我在button 上设置focus。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。因为点击窗口后我按回车然后它调用def self.add().
有人可以告诉我如何在单击任意位置时从按钮中删除 focus
窗户？

test.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()

test.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。

test.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()

test.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()