Когда вы используете ScrollView, вы должны позволить, чтобы его дочерний элемент был больше самого ScrollView. Вот моя модифицированная версия вашего кода с некоторыми изменениями:
#imported from kivy framework
from kivymd.app import MDApp
from kivy.uix.label import Label
from datetime import datetime
from datetime import timedelta
from kivy.clock import Clock
from kivy.properties import StringProperty,ObjectProperty
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from kivy.uix.accordion import Accordion, AccordionItem
class Main_Screen(Screen):
random_number = StringProperty()
def __init__(self, **kwargs):
super(Main_Screen, self).__init__(**kwargs)
pass
class Dictionary_Screen(Screen):
layout = ObjectProperty(None)
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.accordion = None
def on_enter(self, *args):
file1 = open('dict.txt','r')
if self.accordion is None:
self.accordion = Accordion(orientation='vertical', size_hint=(1,None), height=150) # instantiate Accordion
self.ids.view.add_widget(self.accordion) # add Accordion to GridLayout
else:
self.accordion.clear_widgets() # clear out all the AccordionItems
self.accordion.height = 150 # set a starting height (to account for the expanded height of an item)
item_height = 40 # height to use for each AccordionItem
for lines in file1:
fields = lines.split(',')
# Tuple unpacking
Data = (fields[0], fields[1])
Title,Description = Data
print(Title,Description)
item = AccordionItem(title=Title)
item.add_widget(Label(text=Description, color=(0,0,0,1), size_hint=(1, None), height=item_height))
self.accordion.height += item_height # increase Accordion height for his item
self.accordion.add_widget(item) # add AccordionItem to Accordion
#class for all screens
class ScreenManagement(ScreenManager):
pass
kv = '''
#:kivy 1.0
#:import hex kivy.utils.get_color_from_hex
#styles that will apply to all intences for each tag
<MDRaisedButton>:
font_size:18
#declaring screen managers and printing them in this order
ScreenManagement:
Main_Screen:
name: "Main_Screen"
Dictionary_Screen:
name: "Dictionary_Screen"
<Main_Screen>:
FloatLayout:
spacing: 10
canvas.before:
Color:
rgba: hex('#eff3fa')
Rectangle:
size: self.size
pos: self.pos
#Navbar
MDToolbar:
id: fb
pos_hint: {'center_x': 0.5, 'top':1.0}
size_hint_y:None
height: 50
title: "Virtual Assistant"
md_bg_color: hex('#132843')
Label:
id: CurrentTime
font_size:18
size_hint_x: .1
color: (1,1,1,1)
BoxLayout:
orientation: 'vertical'
spacing: 10
padding: 50
canvas.before:
Color:
rgba: hex('#000')
Rectangle:
size: self.size
pos: self.pos
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
size_hint: 0.5, 0.5
Button:
text: "Dictionary"
on_release:
app.root.current = "Dictionary_Screen"
Label:
id: label1
text: root.random_number
color:(1,0,1,1)
<Dictionary_Screen>:
name: "Dictionary_Screen"
view: view
ScrollView:
# size_hint: 1, 1 # this is the default
# setting the width of the scrollbar to 50pixels
bar_width: 50
# bar_margin: 20
# setting the color of the active bar using rgba
bar_color: 5, 10, 15, .8
# setting the color of the inactive bar using rgba
bar_inactive_color: 5, 20, 10, .5
# setting the content only to scroll via bar, not content
scroll_type: ['bars']
GridLayout:
id:view
size_hint_y: None
cols: 1
# minimum_height: self.height
height: self.minimum_height
Button:
text:"back"
on_release: app.root.current = "Main_Screen"
size_hint_y: None
height: self.texture_size[1] + 10
'''
class MainApp(MDApp):
def build(self):
# declaring time from python, and making it refresh every second
self.now = datetime.now()
Clock.schedule_interval(self.update_clock, 1)
return Builder.load_string(kv)
def update_clock(self, *args):
self.now = self.now + timedelta(seconds=1)
self.root.get_screen("Main_Screen").ids["CurrentTime"].text = self.now.strftime("%H:%M:%S")
MainApp().run()
Я добавил файл 'kv' в виде строки, просто для собственного удобства. В вашем 'kv', под GridLayout, у вас есть:
minimum_height: self.height
, но это немного назад, оно должно быть:
height: self.minimum_height
Это говорит GridLayout чтобы настроить его высоту на минимум, который будет содержать все его дочерние элементы.
Я переместил код, который создает Accordion, в метод on_enter, чтобы id для GridLayout был доступен (он не готов внутри метода __init__).
Я также исключил BoxLayout как ненужный и установил size_hint для Accordion в (1, one), чтобы я мог установить height из Accordion. Затем я вычисляю height для Accordion на основе количества добавленных к нему AccordionItems.