使Kivy TextInput框架不可见，但显示文字

Question

我试图制作TextInput小部件＆＃34;隐形＆＃34;就像你使用

一样

opacity: 0

但是，我想要显示TextInput中的文本。如果我使用

opacity: 0

TextInput小部件和小部件内的文本不可见，有没有办法隐藏＆＃34;小部件仍然显示文本？

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen


class ExampleScreen(Screen):
    pass


class ExampleManager(ScreenManager):
    pass


root_widget = Builder.load_string('''
ExampleManager:
    ExampleScreen:

<ExampleScreen>:
    name: 'example_screen'
    TextInput:
        id: t_1
        text: 'Test text in input 1'
        size_hint: .5, .5
        pos_hint: {'x': 0, 'y': .5}
        multiline: True
        readonly: True
        opacity: 0  ## If I remove this line both text edits are visible. 
                    ##You can test this by putting ## before opacity

        ## What I'm trying to do, is make the TextInput widget opaque so 
        ##that you can't see the frame and only the text is visible

    TextInput:
        id: t_2
        text: 'Test text in input 2'
        size_hint: .5, .5
        pos_hint: {'x': 0, 'y': 0}
        multiline: True
        readonly: True
        opacity: 0  ## If I remove this line both text edits are visible. 
                    ##You can test this by putting ## before opacity

        ## What I'm trying to do, is make the TextInput widget opaque so 
        ##that you can't see the frame and only the text is visible

''')

class TestWidgetsApp(App):
    def build(self):
        self.title = 'Proj'
        return root_widget

TestWidgetsApp().run()

Answer 1

使用background_color属性并将alpha chanel设置为0：

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen


class ExampleScreen(Screen):
    pass


class ExampleManager(ScreenManager):
    pass


root_widget = Builder.load_string('''
ExampleManager:
    ExampleScreen:

<ExampleScreen>:
    name: 'example_screen'
    TextInput:
        id: t_1
        text: 'Test text in input 1'
        size_hint: .5, .5
        pos_hint: {'x': 0, 'y': .5}
        multiline: True
        readonly: True
        foreground_color: (1,0,1,1)
        background_color: (0,0,0,0)

    TextInput:
        id: t_2
        text: 'Test text in input 2'
        size_hint: .5, .5
        pos_hint: {'x': 0, 'y': 0}
        multiline: True
        readonly: True
        foreground_color: (1,1,0,1)
        background_color: (0,0,0,0)

''')

class TestWidgetsApp(App):
    def build(self):
        self.title = 'Proj'
        return root_widget

TestWidgetsApp().run()