我正在用kivy创建一个应用程序，它应该从一个窗口大小转到另一个窗口大小。但是，当我调用Window.size =（）时，它实际上并没有更改窗口的大小。
我尝试将Window.size设置在几个不同的位置，
main.py
from kivy.config import Config
#Config.set('graphics', 'resizable', False)
from kivy.app import App
from kivy.properties import StringProperty, ObjectProperty
from kivy.core.window import Window
from kivy.uix.screenmanager import ScreenManager, Screen, SlideTransition, NoTransition
from kivy.clock import Clock
import csv
import paramiko
import time
#import os
def load_csv(filepath):
with open(filepath, newline='') as csvfile:
file_array = list(csv.reader(csvfile))
csvfile.close()
return file_array
class Client(Screen):
Window.size = (1280, 720)
def client(self, ssh, sftp):
print("test")
class Connect(Screen):
Window.size = (600, 300)
def routine(self, host, port, username, password):
ssh = None
sftp = None
#print(username, password)
self.ids.status.text = "connecting"
try:
self.ids.status.text = "attempting to connect to " + host + ":" + str(port)
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(host, port, username, password)
transport = paramiko.Transport((host, port))
transport.connect(username = username, password = password)
sftp = paramiko.SFTPClient.from_transport(transport)
self.ids.status.text = "connected to " + host + ":" + str(port)
Clock.schedule_once(self.continue_to_client, 2)
self.manager.get_screen('client').client(ssh, sftp)
except Exception as e:
if sftp is not None:
sftp.close()
if ssh is not None:
ssh.close()
self.ids.status.text = "connection failed: " + str(e)
Clock.schedule_once(self.return_to_login, 2)
#self.manager.current = 'login'
def return_to_login(self, *args):
self.manager.transition = SlideTransition(direction = "right")
self.manager.current = 'login'
#time.sleep(5)
def continue_to_client(self, *args):
self.manager.transition = NoTransition()
self.manager.current = 'client'
class Login(Screen):
Window.size = (600, 300)
def do_login(self, loginText, passwordText, hostText, portText):
app = App.get_running_app()
if hostText == "":
hostText = "slurm.imsa.edu"
if portText == "":
portText = "22"
host = hostText
port = int(portText)
username = loginText
password = passwordText
self.manager.transition = SlideTransition(direction = "left")
self.manager.current = "connect"
self.manager.get_screen('connect').routine(host, port, username, password)
def resetForm(self):
self.ids['login'].text = ""
self.ids['password'].text = ""
target_x = 600
target_y = 300
manager = ScreenManager()
class BrummetApp(App):
username = StringProperty(None)
password = StringProperty(None)
screenName = StringProperty(None)
title = 'Brummet Client v ' + load_csv("data/meta")[0][1]
def check_resize(self, instance, x, y):
# resize X
#screenName = manager.current
#print(screenName)
if manager.current != "client":
if x > target_x:
Window.size = (target_x, Window.size[1])
if y > target_y:
Window.size = (Window.size[0], target_y)
if x < target_x:
Window.size = (target_x, Window.size[1])
if y < target_y:
Window.size = (Window.size[0], target_y)
def build(self):
manager.add_widget(Login(name = 'login'))
manager.add_widget(Connect(name = 'connect'))
manager.add_widget(Client(name = 'client'))
Window.bind(on_resize=self.check_resize)
return manager
if __name__ == '__main__':
BrummetApp().run()
brummet.kv
<Login>:
BoxLayout
id: login_layout
orientation: 'vertical'
padding: [10,10,10,10]
spacing: 10
BoxLayout:
spacing: 10
orientation:'vertical'
Label:
id: title
text: 'Brummet Client'
halign: 'center'
valign: 'middle'
font_size: 24
Label:
text: 'Please log in with IMSA SLURM credentials'
halign: 'center'
valign: 'middle'
font_size: 20
BoxLayout:
orientation: 'horizontal'
Label:
size_hint: (0.15, 1)
text: 'Username'
font_size: 18
halign: 'left'
TextInput:
size_hint: (0.7, 1)
id: username
multiline: False
font_size: 18
write_tab: False
BoxLayout:
orientation: 'horizontal'
Label:
size_hint: (0.15, 1)
text: 'Password'
halign: 'left'
font_size: 18
TextInput:
size_hint: (0.7, 1)
id: password
multiline: False
password: True
font_size: 18
write_tab: False
BoxLayout:
orientation: 'horizontal'
Label:
size_hint: (0.15, 1)
text: 'Host'
halign: 'left'
font_size: 18
TextInput:
size_hint: (0.7, 1)
hint_text: 'slurm.imsa.edu'
id: host
multiline: False
font_size: 18
write_tab: False
BoxLayout:
orientation: 'horizontal'
Label:
size_hint: (0.15, 1)
text: 'Port'
halign: 'left'
font_size: 18
TextInput:
size_hint: (0.7, 1)
input_type: 'number'
input_filter: 'int'
hint_text: '22'
id: port
multiline: False
font_size: 18
write_tab: False
Button:
text: 'Log In'
font_size: 24
id: submit
on_press:
root.do_login(username.text, password.text, host.text, port.text)
<Connect>:
BoxLayout:
orientation: 'vertical'
padding: [0,100,0,100]
spacing: 0
Label:
text:'Logging In'
font_size: 24
halign: 'center'
valign: 'middle'
Label:
id: status
test:''
font_size: 12
halign: 'center'
valign: 'middle'
text_size: self.size
size_hint: 1,1
shorten: True
<Client>:
BoxLayout:
orientation: 'horizontal'
padding: [5, 5, 5, 5]
spacing: 0
Button:
Button:
输入Client（）时，代码应将窗口大小更改为1280 x 720，但是，以前的600 x 300窗口仍然存在。
答案 0 :(得分：0)
要更改每个屏幕的大小，请使用ScreenManager on_pre_enter事件。
class Client(Screen):
def on_pre_enter(self, *args):
Window.size = (1280, 720)