FileDownload widget can't get disabled=False once created with disabled=True

[hugocatlas]

Dear Panel team,

I'm facing an issue with the new FileDownload widget which I believe to be a bug, unless I'm doing a bad utilization of it. For info, I'm using Panel version 0.10.2.

Consider the following MWE:

import time
import panel as pn
pn.extension()

log_download1 = pn.widgets.FileDownload(button_type='success', label='Download log', disabled=True)

log_download2 = pn.widgets.Button(button_type='success', name='Download log', disabled=True)

def enable_button(button_obj):
    for i in range(5):
        time.sleep(1)
        if i == 3:
            button_obj.disabled = False

#then compare 
enable_button(button_obj=log_download1)

#against 
enable_button(button_obj=log_download2)

Upon calling enable_button on log_download1 (FileDownload widget), the button won't get enabled when i == 3. Making the same for log_download2 (Button widget) works as expected: the button is created disabled and it gets enabled if a given condition is met. It is unfortunate if the same behavior can't be obtained using FileDownload since in my use case, I need to make the download available only when a given flag is found in a log file.

Hope it helps.

Thanks in advance,

Hugo

[rafgonsi]

Hello,

I experienced similar issue with panel 0.9.7. It seems that the button gets enabled (at least in a sense that its disabled values is set to False), although this change is not visible. See gif below:

See the discussion and possible workaround here
https://discourse.holoviz.org/t/filedownload-widget-does-not-disable-enable-correctly/1523