[必需:在guizero App上按下按钮应首先设置一个文本值,然后执行一个功能(这里是一个简单的time.sleep();最初是一个子进程);执行该功能后,应显示结果文本;
#!/usr/bin/python3
# -*- coding: utf-8 -*-
from guizero import App, PushButton, Text
import subprocess
import time
# Action you would like to perform
def counter0():
global s0
text0.value = int(text0.value) + 1 # works
text1.value = s0 # works
def counter1():
global s0
text1.value = s0 # display a status value - but does not (!)
time.sleep(1) # originally a subprocess is called here; works
text1.value = "ready" # only diplays this after a delay
s0="start something after pressing butt1"
app = App("Hello world", layout="grid")
text0 = Text(app, text="1", align="left", grid=[0,1])
text1 = Text(app, text=s0, align="left",grid=[0,8] )
butt1 = PushButton(app, text="Button", command=counter1, align="left", grid=[0,2])
text0.repeat(10000, counter0) # Schedule call to counter() every 1000ms
app.display()
[很可能我不了解guizero背后的想法。任何想法如何管理此类需求?
如果我正确理解了您的问题,则您的特定问题在这里:
text1.value = s0 # display a status value - but does not (!)
这不起作用,因为guizero
框架正在同步执行该功能:直到该函数返回之前,没有其他代码可以执行-包括更新显示的代码。
如果您想:
subprocess
运行命令之前显示消息然后,您将需要重写逻辑,以使您的应用程序不必等待counter1完成。异步运行代码的一种方法是在单独的线程中运行它。例如:
from guizero import App, PushButton, Text
import threading
import time
# Action you would like to perform
def counter0():
global s0
text0.value = int(text0.value) + 1 # works
text1.value = s0 # works
def run_command():
time.sleep(1) # originally a subprocess is called here; works
text1.value = "ready" # only diplays this after a delay
def counter1():
global s0
text1.value = "Running command..."
threading.Thread(target=run_command).start()
s0 = "start something after pressing butt1"
app = App("Hello world", layout="grid")
text0 = Text(app, text="1", align="left", grid=[0, 1])
text1 = Text(app, text=s0, align="left", grid=[0, 8])
butt1 = PushButton(app, text="Button", command=counter1,
align="left", grid=[0, 2])
text0.repeat(10000, counter0)
app.display()
运行上面的代码将给您以下行为: