PySimpleGUI未响应

Question

我使用PySimpleGui制作一个简单的文件格式转换程序，但是我的程序的小窗口一直告诉我(没有响应)，就像它在实际工作和编写新文件时被压碎了一样。

问题是循环，如果我删除它，一切正常，但用户对转换的进展没有任何反应。我编写了一些关于python线程的文档，我认为一切都应该正常工作，有什么建议吗？这是代码：‘

def main():
    
    
    sg.theme('DarkGrey3')
    layout1 = [[sg.Text('File converter (.csv to sdf)')],
              [sg.Frame('Input Filename', 
                        [[sg.Input(key='-IN-'), sg.FileBrowse(), ],])],
              [sg.Frame('Output Path', 
                        [[sg.Input(key='-OUT-'), sg.FolderBrowse(), ],])],
              [sg.Button('Convert'), sg.Button('Exit')], [sg.Text('', key='-c-')]]
    window=sg.Window(title='.csv to .sdf file converter', layout=layout1, margins=(50, 25))
    window.read()
    while True:
        event, values = window.read()
        if event=='Exit' or event==None:
            break
        if event=='Convert':            
            csvfilepath=values['-IN-']
            outpath=values['-OUT-']
            x=threading.Thread(target=Converter, args=[csvfilepath, outpath])
            x.start()
            time.sleep(1)
            while x.is_alive():
                window['-c-'].Update('Conversion')
                time.sleep(1)
                window['-c-'].Update('Conversion.')
                time.sleep(1)
                window['-c-'].Update('Conversion..')
                time.sleep(1)
                window['-c-'].Update('Conversion...')
                time.sleep(1)

`

Answer 1

您的代码正在按预期工作。窗口没有响应，因为您有一个阻塞主线程的while循环。主线程负责处理事件和更新窗口。

有几种方法可以解决这个问题。一个是将while循环移动到一个单独的线程中。另一种方法是使用PySimpleGUI的内置进度条特性。

下面是如何使用进度条的示例：

import PySimpleGUI as sg

layout = [[sg.Text('Progress Bar')],
          [sg.ProgressBar(1000, orientation='h', size=(20, 20), key='progress')],
          [sg.Cancel()]]

window = sg.Window('Window Title', layout)
progress_bar = window['progress']

for i in range(1000):
    # update progress bar with loop value +1 so that bar reaches the end
    event, values = window.read(timeout=0)
    if event == 'Cancel' or event == sg.WIN_CLOSED:
        break
    progress_bar.UpdateBar(i + 1)

window.close()

Answer 2

下面的代码演示如何通过超时事件和线程更新GUI。

import time
import threading
import PySimpleGUI as sg

def convert_func(window):
    for i in range(10):    # Simuate the conversion
        window.write_event_value('Conversion Step', i)
        time.sleep(1)
    window.write_event_value('Conversion Done', None)

layout = [
    [sg.Button('Convert'), sg.Text('', expand_x=True, key='Step')],
    [sg.StatusBar('', size=20, key='Status')],
]
window = sg.Window('Title', layout, finalize=True)
status, step = window['Status'], window['Step']
running, index, m = False, 0, 10
msg = ['Conversion'+'.'*i for i in range(m)]

while True:

    event, values = window.read(timeout=200)

    if event == sg.WIN_CLOSED:
        break
    elif event == 'Convert':
        threading.Thread(target=convert_func, args=(window,), daemon=True).start()
        running = True
    elif event == sg.TIMEOUT_EVENT and running:
        status.update(msg[index])
        index = (index + 1) % m
    elif event == 'Conversion Step':
        print(event)
        i = values[event]
        step.update(f'Step {values[event]}')
    elif event == 'Conversion Done':
        running = False
        step.update('')
        status.update(event)

window.close()

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