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pythonを使用してkivy言語でラベルのテキストを変更する方法

Pythonを使用してKivy言語内で作成されたラベルのテキストをどのように変更できるのか疑問に思いました。どのように私はpythonからのユーザー入力をkivyのラベルのテキストとして作成しますか？ ）コードから入力したラベルのテキストをpythonで生成された乱数にする場合はどうすればよいですか？

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.graphics import Color, Rectangle
from kivy.properties import ObjectProperty

# Create both screens. Please note the root.manager.current: this is how
# you can control the ScreenManager from kv. Each screen has by default a
# property manager that gives you the instance of the ScreenManager used.


Builder.load_string("""
<ButImage@ButtonBehavior+AsyncImage>
<TutImage@ButtonBehavior+AsyncImage>
<MenuScreen>:
GridLayout:
    cols: 4
    row_force_default: True
    col_default_width: 175
    row_default_height: 150
    padding: 15
    spacing: 15
    canvas.before:
        BorderImage:
            # BorderImage behaves like the CSS BorderImage
            border: 10, 10, 10, 10
            source: '/Users/clayhigh/Desktop/kivy/aot.png'
            pos: self.pos
            size: self.size
    Button:
        text: 'Goto settings'
        background_color: 1,0,0,0.5
        on_press: root.manager.current = 'settings'
    ButImage:
        on_press: root.manager.current = 'UBW'
        id: but
        size_hint: .5, .5
        opacity: 1 if self.state == 'normal' else .5
        allow_stretch: True
        keep_ratio: False
        source: 'http://s3.amazonaws.com/rapgenius/1361742626_beautiful-ocean-beautiful-pictures-27115524-1440-900.jpg'
        Label:
            center: but.center
            text: "UBW"
            color: 0.78,0.145,0.016,2
    ButImage:
        id: lh
        size_hint: .5, .5
        opacity: 1 if self.state == 'normal' else .5
        allow_stretch: True
        keep_ratio: False
        source: 'http://s3.amazonaws.com/rapgenius/1361742626_beautiful-ocean-beautiful-pictures-27115524-1440-900.jpg'
        Label:
            center: lh.center
            text: "LH 2"
            color: 0,0,0,1
    ButImage:
        id: ttl
        size_hint: .5, .5
        opacity: 1 if self.state == 'normal' else .5
        allow_stretch: True
        keep_ratio: False
        source: 'http://s3.amazonaws.com/rapgenius/1361742626_beautiful-ocean-beautiful-pictures-27115524-1440-900.jpg'
        Label:
            center: ttl.center
            text: "TwTl"
            color: 0,0,0,1
    ButImage:
        id: gris
        size_hint: .5, .5
        opacity: 1 if self.state == 'normal' else .5
        allow_stretch: True
        keep_ratio: False
        source: 'http://s3.amazonaws.com/rapgenius/1361742626_beautiful-ocean-beautiful-pictures-27115524-1440-900.jpg'
        Label:
            center: gris.center
            text: "Gris"
            color: 0,0,0,1
    ButImage:
        id: shig
        size_hint: .5, .5
        opacity: 1 if self.state == 'normal' else .5
        allow_stretch: True
        keep_ratio: False
        source: 'http://s3.amazonaws.com/rapgenius/1361742626_beautiful-ocean-beautiful-pictures-27115524-1440-900.jpg'
        Label:
            center: shig.center
            text: "Shig"
            color: 0,0,0,1
    Button:
        text: 'Test3'
        background_color: 1,0,0,0.5
    Button:
        text: 'Test4'
        background_color: 1,0,0,0.5
    Button:
        text: 'Quit'
        background_color: 1,0,0,0.5
        on_press: App.on_stop

<SettingsScreen>:
GridLayout:
    row_force_default: True
    row_default_height: 100
    cols: 2
    canvas.before:
        BorderImage:
            # BorderImage behaves like the CSS BorderImage
            border: 10, 10, 10, 10
            source: '/Users/clayhigh/Desktop/kivy/ato.jpeg'
            pos: self.pos
            size: self.size
    Button:
        text: 'Button'
        color: 0,0,.5
        background_color: 1,0,0,1
    Button:
        text: 'Back to menu'
        background_color: 1,0,0,1
        on_press: root.manager.current = 'menu'
<UBW>:
GridLayout:
    row_force_default: True
    row_default_height: 100
    cols: 2
    canvas.before:
        Color:
            rgb: .5, .5, .5
        Rectangle:
            pos: self.pos
            size: self.size
        Color:
            rgb: 1, 1, 1
        BorderImage:
            # BorderImage behaves like the CSS BorderImage
            border: 10, 10, 10, 10
            source: '/Users/clayhigh/Desktop/kivy/fsn.jpg'
            pos: self.pos
            size: self.size
    Button:
        text: 'Back to menu'
        color: 0,0,.5
        on_press: root.manager.current = 'menu'
        background_color: 1,0,0,1
    Label:
        id: AName
        text: "F S/N: UBW"
        font_size: '24sp'
""")

# Declare both screens


class MenuScreen(Screen):
pass


class SettingsScreen(Screen):
pass


class UBW(Screen):
pass

# Create the screen manager
sm = ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(SettingsScreen(name='settings'))
sm.add_widget(UBW(name='UBW'))


class TestApp(App):

def build(self):
    return sm

if __name__ == '__main__':
TestApp().run()
pythonpython-3.xkivy
15
user2896775

ラベルのテキストはkivyプロパティにすることができ、後で変更できます。kivyプロパティであるため、どこでも自動的に更新されます。これが.pyの例です

_from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import StringProperty
import random

class YourWidget(Widget):
    random_number = StringProperty()

    def __init__(self, **kwargs):
        super(YourWidget, self).__init__(**kwargs)
        self.random_number = str(random.randint(1, 100))

    def change_text(self):
        self.random_number = str(random.randint(1, 100))

class YourApp(App):
    def build(self):
        return YourWidget()

if __name__ == '__main__':
    YourApp().run()
_

そしてあなたの.kv

_<YourWidget>:
    BoxLayout:
        size: root.size
        Button:
            id: button1
            text: "Change text"
            on_release: root.change_text()
        Label:
            id: label1
            text: root.random_number
_

ボタンをクリックすると、change_text()関数が呼び出され、ラベルのテキストがランダムに1〜100の整数に変更されます。

12
Tatarkow