kivyで、recycleviewの行を削除したい

kivyで recycleviewのリストに削除ボタンを設定しました。
選択した行を削除したいです。
選択していない行は、削除ボタンを押しても削除されないようにしたいです。
SelectablLabelクラスの中に削除用のモジュールを作りたいです。
あと、行が選択されているか否かの判別も行いたいです。

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import BooleanProperty
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior

import japanize_kivy

Builder.load_string('''
<SelectableLabel>:
    canvas.before:
        Color:
            rgba: (.8, .8, .8, 1) if self.selected else (1, .8, .8, 1)
        Rectangle:
            pos: self.pos
            size: self.size
    label1_text: 'label 1 text'
    label2_text: 'label 2 text'
    label3_text: 'label 3 text'
    pos: self.pos
    size: self.size

    #Label:
    #    id: id_label1
    #    text: root.label1_text
    #    color: [0,0,0,1]
    #    font_size: 20

    Label:
        id: id_label2
        text: root.label2_text
        color: [0,0,0,1]
        font_size: 20
        size_hint_x: 4

    Label:
        id: id_label3
        text: root.label3_text
        color: [0,0,0,1]
        font_size: 20
        size_hint_x: 4
    Button:
        text: '削除'
        font_size: 20
        size_hint_x: 2
        on_press: detach_recycleview() #どのように当該の行と関連づけるか？

<RV>:
    viewclass: 'SelectableLabel'
    SelectableRecycleBoxLayout:
        default_size: None, dp(45)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'
        multiselect: True
        touch_multiselect: True

''')

items_1 = ['カツ丼','天丼','親子丼','玉子丼','オムライス','カツカレー']
items_2 = ['850','850','750','670','800','850']

class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
                                 RecycleBoxLayout):
    pass

class SelectableLabel(RecycleDataViewBehavior, GridLayout):

    index = None
    selected = BooleanProperty(False)
    selectable = BooleanProperty(True)
    cols = 3

    def refresh_view_attrs(self, rv, index, data):
        '''Catch and handle the view changes '''
        self.index = index
        self.label1_text = str(index)
        self.label2_text = data['label2']['text']
        self.label3_text = data['label3']['text']
        return super(SelectableLabel, self).refresh_view_attrs(
            rv, index, data)

    def on_touch_down(self, touch):
        ''' Add selection on touch down '''
        if super(SelectableLabel, self).on_touch_down(touch):
            return True
        if self.collide_point(*touch.pos) and self.selectable:
            return self.parent.select_with_touch(self.index, touch)

    def apply_selection(self, rv, index, is_selected):
        ''' Respond to the selection of items in the view. '''
        self.selected = is_selected
        if is_selected:
            print('selection changed to {}'.format(rv.data[index]))
        else:
            print('selection removed for {}'.format(rv.data[index]))

class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        paired_iter = zip(items_1, items_2)
        self.data = []
        for i1, i2 in paired_iter:
            d = {'label2': {'text': i1}, 'label3': {'text': i2}}
            self.data.append(d)

class Menu01App(App):
    def build(self):
        return RV()

if __name__ == '__main__':
    Menu01App().run()