我将小部件添加到
默认情况下,在用户滚动之前,视图始终停留在顶部,无论您添加多少个小部件。如果用户滚动,视图会附加到该点,但是对我来说,必须向下滚动(即使只有一点点)才能始终显示最新内容,这似乎有点烦人。如何使其默认显示最下面的部分?
ScrollView
中的GridLayout
中,因此其内容会动态扩展。默认情况下,在用户滚动之前,视图始终停留在顶部,无论您添加多少个小部件。如果用户滚动,视图会附加到该点,但是对我来说,必须向下滚动(即使只有一点点)才能始终显示最新内容,这似乎有点烦人。如何使其默认显示最下面的部分?
以下是示例代码:
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import Screen
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.uix.scrollview import ScrollView
from kivy.uix.gridlayout import GridLayout
Builder.load_string('''
<MessageView>:
canvas:
Color:
rgba: 1, 1, 1, 1
Rectangle:
pos: self.pos
size: self.size
<Message>:
canvas:
Color:
rgba: 0, 1, 0, 0.3
Rectangle:
pos: self.pos
size: self.size
''')
class Message(Widget):
pass
class MessageView(ScrollView):
pass
class TestApp(App):
def msg_in(self, btn):
msg = Message()
msg.size_hint = [None, None]
self.msg_layout.add_widget(msg)
def build(self):
self.scr = Screen()
self.sv1_main = MessageView(pos_hint={"top": 0.87, "center_x": 0.5},
size_hint=(0.97, 0.65))
self.msg_layout = GridLayout(cols=1,
size_hint_y=None)
self.msg_layout.bind(minimum_height=self.msg_layout.setter('height'))
self.bt1_main = Button(size_hint=(0.1, 0.078),
pos_hint={"top": 0.097, "center_x": 0.927},
on_press=self.msg_in)
self.scr.add_widget(self.sv1_main)
self.sv1_main.add_widget(self.msg_layout)
self.scr.add_widget(self.bt1_main)
return self.scr
TestApp().run()