使用 RecycleView 滚动时如何保持我的 Kivy ToggleButton 状态？

Question

如果我创建一个 ToggleButton 列表并将它们放在 RecycleView 中，切换一个 ToggleButton 会导致视图外的 ToggleButton 通过滚动进出视图来更改状态。我是否错误地实施了 RecycleView？

如果我使用按钮而不是切换按钮，我的 RecycleView 会按预期工作。

from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview import RecycleView
from kivy.properties import StringProperty,NumericProperty
Builder.load_string("""
<MyLayout>:
    orientation: 'vertical'
    spacing: 10
    RV:
<RV>:
    viewclass: 'RecycleViewRow'
    RecycleBoxLayout:
        default_size: None, dp(56)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'

<RecycleViewRow>:
    orientation: 'horizontal'
    ToggleButton:
        text: root.text
""")

class MyLayout(BoxLayout):
    pass

class RecycleViewRow(BoxLayout):
    text = StringProperty()

class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.data = [{'text': "Button " + str(x+1)} for x in range(30)]

class MainscreenApp(App):
    def build(self):
        return MyLayout()

if __name__=="__main__":
    MainscreenApp().run()

Answer 1

这里是对执行 self.data 更新的代码的修改：

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview import RecycleView
from kivy.properties import StringProperty

Builder.load_string("""
<MyLayout>:
    orientation: 'vertical'
    spacing: 10
    RV:
        id: rv
<RV>:
    viewclass: 'RecycleViewRow'
    RecycleBoxLayout:
        default_size: None, dp(56)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'

<RecycleViewRow>:
    orientation: 'horizontal'
    ToggleButton:
        id: tb
        text: root.text
        state: root.state
        on_release: app.root.ids.rv.adjust_data(root)
""")

class MyLayout(BoxLayout):
    pass

class RecycleViewRow(BoxLayout):
    text = StringProperty()
    state = StringProperty('normal')

class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.data = [{'text': "Button " + str(x+1), 'state': "normal"} for x in range(30)]

    def adjust_data(self, rvRow):
        for d in self.data:
            if d['text'] == rvRow.text:
                d['state'] = rvRow.ids.tb.state
                rvRow.state = rvRow.ids.tb.state
                break

class MainscreenApp(App):
    def build(self):
        return MyLayout()

if __name__=="__main__":
    MainscreenApp().run()

使用 RecycleView 滚动时如何保持我的 Kivy ToggleButton 状态？

How can I keep my Kivy ToggleButton state when scrolling using a RecycleView?

python

togglebutton

kivy