python - RecycleView 内的 Kivy 尺寸标签

Question

我希望我的标签具有显示文本所需的高度。它位于 RecycleView 内。我认为我的代码应该在 RecycleView 之外工作。

如何使标签足够大，以便可以轻松阅读其内容？就像它已经适用于 CodeInput 和 TextInput 一样。

from kivy.base import runTouchApp
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.label import Label
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.properties import StringProperty


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

<SnippetView>:
    canvas.before:
        Color:
            rgb: (255,0,0)
        Rectangle:
            pos: self.pos
            size: self.size
    orientation: 'vertical'

    Label:
        text: root.heading
        text_size: root.width, None
        size: self.texture_size
    TextInput:
        text: root.dscrpt
        size_hint_y: None
        height: self.minimum_height
    CodeInput:
        text: root.code
        size_hint_y: None
        height: self.minimum_height

''')

class SnippetView(BoxLayout):
    heading = StringProperty()
    dscrpt = StringProperty()
    code = StringProperty()


class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.data = [{'heading': str(x),'dscrpt': str(x),'code': str(x)} for x in range(100)]

rv = RV()
runTouchApp(rv)

由于我是第一次使用 RecycleView，所以我也感谢任何有关 RecycleView 的评论。

Answer 1

当标签值发生变化时，您必须绑定(bind)一个方法来更新 SnippetView 的 height，因为您已在 RV 的规则中修复了它。试试这个:

...

Builder.load_string('''

...

<SnippetView>:
    canvas.before:
        Color:
            rgb: (255,0,0)
        Rectangle:
            pos: self.pos
            size: self.size
    orientation: 'vertical'

    Label:
        id: l
        text: root.heading
        text_size: root.width, None
        size: self.texture_size
    TextInput:
        id: ti
        text: root.dscrpt
        size_hint_y: None
        height: self.minimum_height
    CodeInput:
        id: ci
        text: root.code
        size_hint_y: None
        height: self.minimum_height

''')

class SnippetView(BoxLayout):
    heading = StringProperty()
    dscrpt = StringProperty()
    code = StringProperty()

    def __init__(self, **kwargs):
        super(SnippetView, self).__init__(**kwargs)
        self.ids.l.bind(height=self.update)

    def update(self, *args):
        self.height = self.ids.l.texture_size[1] + self.ids.ti.height + self.ids.ci.height

...