问Kivy:替代已弃用的功能

EN

from kivy.app import App
from kivy.uix.treeview import TreeView
from kivy.uix.treeview import TreeViewLabel
from kivy.uix.treeview import TreeViewNode
from kivy.uix.scrollview import ScrollView
from kivy.uix.rst import RstDocument
from kivy.core.window import Window
from kivy.uix.stacklayout import StackLayout
import kivy


class TreeViewRst (RstDocument,TreeViewNode):
        pass

def update_size (event1,event2):
    event1.size = event1.viewport_size

txt ="""

Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
Mauris accumsan consequat justo, non aliquet sapien bibendum non. 
Nam quam risus, tempus quis lorem eu, sodales facilisis justo. 

Curabitur quis placerat ante. Phasellus tempor, libero vitae 
commodo accumsan, lorem metus eleifend velit, id dapibus ipsum ante sed massa. 
onec aliquam pellentesque pharetra. Praesent quis augue id elit facilisis euismod 
vel nec erat. Vestibulum nec dolor eget sem ullamcorper tempor id et dui. In a egestas massa.
Nulla vel augue non nisi varius varius.

"""

class TreeApp (App):
    def build (self):
        root = StackLayout()
        scroll = ScrollView(pos = (0, 0),size_hint=(1,0.78))
        body = TreeView(hide_root=True,indent_level=0,size_hint=(1,None))
        body.bind(minimum_height=body.setter('height'))
        intro = body.add_node(TreeViewLabel(text="Title",font_size=18))
        intro_diag = body.add_node(TreeViewLabel(text="Article"))
        long_txt = txt*10
        test = body.add_node(TreeViewRst(text=long_txt, size=(100,400)),parent=intro_diag)

        #test.bind(on_scroll_start=update_size)
        scroll.add_widget(body)
        root.add_widget(scroll)
        print(kivy.__version__)
        return root

Window.size = (360,640)
tree = TreeApp()
tree.run()

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



items = [
    {"text": "white",    "selected": 'normal', "input_data": ["some","random","data"]},
    {"text": "lightblue","selected": 'normal', "input_data": [1,6,3]},
    {"text": "blue",     "selected": 'normal', "input_data": [64,16,9]},
    {"text": "gray",     "selected": 'normal', "input_data": [8766,13,6]},
    {"text": "orange",   "selected": 'normal', "input_data": [9,4,6]},
    {"text": "yellow",   "selected": 'normal', "input_data": [852,958,123]},
    {"text": "white",    "selected": 'normal', "input_data": ["some","random","data"]},
    {"text": "lightblue","selected": 'normal', "input_data": [1,6,3]},
    {"text": "blue",     "selected": 'normal', "input_data": [64,16,9]},
    {"text": "gray",     "selected": 'normal', "input_data": [8766,13,6]},
    {"text": "orange",   "selected": 'normal', "input_data": [9,4,6]},
    {"text": "yellow",   "selected": 'normal', "input_data": [852,958,123]}
]



class MyViewClass(RecycleDataViewBehavior, BoxLayout):

    text = StringProperty("")
    index = None

    def set_state(self,state,app):
        app.root.ids.rv.data[self.index]['selected'] = state

    def refresh_view_attrs(self, rv, index, data):
        self.index = index
        return super(MyViewClass, self).refresh_view_attrs(rv, index, data)



class MyRecycleView(RecycleView):

    data = items

    def print_data(self,data):
        print([item['input_data'] for item in data if item['selected'] == 'down'])



KV = '''

<MyViewClass>:
    orientation: 'horizontal'
    CheckBox:
        on_state: root.set_state(self.state,app)
    Label:
        text: root.text

BoxLayout:
    orientation: 'vertical'
    MyRecycleView:
        id: rv
        viewclass: 'MyViewClass'
        RecycleBoxLayout:
            orientation: 'vertical'
            default_size: None, dp(56)
            default_size_hint: 1, None
            size_hint_y: None
            height: self.minimum_height
    Button:
        size_hint_y: 0.1
        text: "Print data"
        on_release: rv.print_data(rv.data)

'''



class Test(App):
    def build(self):
        root = Builder.load_string(KV)
        return root


Test().run()