CTkProgressBar for long process start with button click

[emcek]

I need show and start CTkProgressBar in indeterminate mode (since this would be a long task), when task finish I would like to hide progress bar.

Start and Stop is fine, but when I click Long it just wait 5 sec or do anything (execute method I see logs it really doing it), but progress bar do not show up.

import time
import customtkinter

class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()
        self.progressbar = customtkinter.CTkProgressBar(self, mode='indeterminate')
        self.btn_start = customtkinter.CTkButton(self, text='Start', command=self._start)
        self.btn_start.grid(row=0, column=0)
        self.btn_stop = customtkinter.CTkButton(self, text='Stop', command=self._stop)
        self.btn_stop.grid(row=1, column=0)
        self.long = customtkinter.CTkButton(self, text='Long', command=self._long)
        self.long.grid(row=2, column=0)

    def _start(self):
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()
        
    def _stop(self):
        self.progressbar.stop()
        self.progressbar.grid_forget()

    def _long(self):
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()
        time.sleep(5)  # any long process
        self.progressbar.stop()
        self.progressbar.grid_forget()


app = App()
app.mainloop()

I guess it is king of 'repaint' issue, because instead of sleep I start message box to get user input progress bar appear for shot time.

    def _long(self):
        from CTkMessagebox import CTkMessagebox
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()
        CTkMessagebox(title='OK?', message='OK', option_1='OK')
        time.sleep(5)  # any long process
        self.progressbar.stop()
        self.progressbar.grid_forget()

I try even setup callback (but no luck) with:

    def _long(self):
        from concurrent import futures
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()
        local_zip = Path(gettempdir()) / 'dcspy_2.2.0.exe'
        url = 'https://github.com/emcek/dcspy/releases/download/v2.2.0/dcspy_2.2.0.exe'
        with futures.ThreadPoolExecutor() as executor:
            future = executor.submit(download_file, url, local_zip)
            future.add_done_callback(self.stop_pg)

    def stop_pg(self, future):
        result = future.result()
        print(result)
        self.progressbar.stop()
        self.progressbar.grid_forget()

def download_file(url, save_path):
    from requests import get
    response = get(url=url, stream=True, timeout=5)
    if response.ok:
        print(f'Download file from: {url}')
        with open(save_path, 'wb+') as dl_file:
            for chunk in response.iter_content(chunk_size=128):
                dl_file.write(chunk)
            print(f'Saved as: {save_path}')
            return True
    else:
        print(f'Can not download from: {url}')
        return False

I'm missing something???

[Akascape]

@emcek
When you use time.sleep method, it freezes the whole application and all the processes gets blocked eventually. So, instead of using that method, you can use the after method of tkinter.

self.after(5000, lambda: self.progressbar.stop()) # time is in milliseconds 

[emcek]

@Akascape
I get it. But whole point is, instead of sleep() or after() I need call some peace of code and after stop() progressbar. i.e.

from pathlib import Path
from tempfile import gettempdir
import customtkinter
from requests import get


class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()
        self.progressbar = customtkinter.CTkProgressBar(self, mode='indeterminate')
        self.btn_start = customtkinter.CTkButton(self, text='Start', command=self._start)
        self.btn_start.grid(row=0, column=0)
        self.btn_stop = customtkinter.CTkButton(self, text='Stop', command=self._stop)
        self.btn_stop.grid(row=1, column=0)
        self.long = customtkinter.CTkButton(self, text='Long', command=self._long)
        self.long.grid(row=2, column=0)

    def _start(self):
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()

    def _stop(self):
        self.progressbar.stop()
        self.progressbar.grid_forget()

    def _long(self):
        self.progressbar.grid(row=3, column=0)
        self.progressbar.start()
        local = Path(gettempdir()) / 'dcspy_2.2.0.exe'
        url = 'https://github.com/emcek/dcspy/releases/download/v2.2.0/dcspy_2.2.0.exe'
        download_file(url, local)
        self.progressbar.stop()
        self.progressbar.grid_forget()


def download_file(url, save_path):
    response = get(url=url, stream=True, timeout=5)
    if response.ok:
        print(f'Download file from: {url}')
        with open(save_path, 'wb+') as dl_file:
            for chunk in response.iter_content(chunk_size=128):
                dl_file.write(chunk)
            print(f'Saved as: {save_path}')
            return True
    else:
        print(f'Can not download from: {url}')
        return False


app = App()
app.mainloop()