Kivy可滚动标签：无法读取标签的开头和结尾

Question

我有这些可滚动的标签，但我看不到它们的开头和结尾（字母以1开头，字母以8开头）。

另一个问题是滚动视图从中间开始，并在释放滚动时自动跳回到中心。 最好让它显示左侧部分，让标签停下来滚动。

我使用python 3.6和Kivy 1.9.2.dev0，我的代码必须在python中（没有.kv文件或生成器）

import kivy

from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.uix.popup import Popup
from kivy.uix.label import Label
# from kivy.properties import StringProperty
from kivy.uix.scrollview import ScrollView

class Test(App):
    def build(self):
        layout_pop  = GridLayout (cols=3)
        for i in range(3):
            l = Label(
                 text="1abcdefghijklmnopqrstuvwxyz_2abcdefghijklmnopqrstuvwxyz_3abcdefghijklmnopqrstuvwxyz_4abcdefghijklmnopqrstuvwxyz_5abcdefghijklmnopqrstuvwxyz_6abcdefghijklmnopqrstuvwxyz_7abcdefghijklmnopqrstuvwxyz_8abcdefghijklmnopqrstuvwxyz",
                 font_size=15,
                 color=(1,1,3,1), 
                 size_hint_x= None,
                 width=600)  
            l.bind(size_hint_min_x=l.setter('width'))
            scroll = ScrollView(size_hint=(None, None), size=(200, 30))
            scroll.add_widget(l)
            layout_pop.add_widget(scroll)
        return layout_pop


Test().run()

Answer 1

我只需要使用l.bind(texture_size=l.setter('size')) 。 修复了2个问题。 这是更新的def函数：

def build(self):
    layout_pop  = GridLayout (cols=3)
    for i in range(3):
        l = Label( 
            text="1abcdefghijklmnopqrstuvwxyz_2abcdefghijklmnopqrstuvwxyz_3abcdefghijklmnopqrstuvwxyz_4abcdefghijklmnopqrstuvwxyz_5abcdefghijklmnopqrstuvwxyz_6abcdefghijklmnopqrstuvwxyz_7abcdefghijklmnopqrstuvwxyz_8abcdefghijklmnopqrstuvwxyz \n1abcdefghijklmnopqrstuvwxyz_2abcdefghijklmnopqrstuvwxyz_3abcdefghijklmnopqrstuvwxyz_4abcdefghijklmnopqrstuvwxyz_5abcdefghijklmnopqrstuvwxyz_6abcdefghijklmnopqrstuvwxyz_7abcdefghijklmnopqrstuvwxyz_8abcdefghijklmnopqrstuvwxyz", 
            font_size=15, 
            color=(1,1,3,1), 
            size_hint_x= None)
        l.bind(texture_size=l.setter('size'))
        l.bind(size_hint_min_x=l.setter('width'))
        scroll = ScrollView(size_hint=(None, None), size=(200, 30))
        scroll.add_widget(l)
        layout_pop.add_widget(scroll)
    return layout_pop