[ Bug/Question] Is it possible to update the position of a slider element?

[sequeirayeslin]

Type of Issue (Enhancement, Error, Bug, Question)

Bug/ Question

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Operating System

Windows 10

PySimpleGUI Port (tkinter, Qt, Wx, Web)

tkinter

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Versions

Version information can be obtained by calling sg.main_get_debug_data()
Or you can print each version shown in ()

Python version (sg.sys.version)

3.8.3

PySimpleGUI Version (sg.__version__)

4.39.1

GUI Version (tkinter (sg.tclversion_detailed), PySide2, WxPython, Remi)

8.6.9

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Your Experience In Months or Years (optional)

Years Python programming experience
5 months
Years Programming experience overall
1 year
Have used another Python GUI Framework? (tkinter, Qt, etc) (yes/no is fine)
no
Anything else you think would be helpful?

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Troubleshooting

These items may solve your problem. Please check those you've done by changing - [ ] to - [X]

• Searched main docs for your problem www.PySimpleGUI.org
• Looked for Demo Programs that are similar to your goal Demos.PySimpleGUI.org
• If not tkinter - looked for Demo Programs for specific port
• For non tkinter - Looked at readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported Issues.PySimpleGUI.org
• Tried using the PySimpleGUI.py file on GitHub. Your problem may have already been fixed but not released

Detailed Description

I tried using the update method on the slider, but it doesnt do anything. I'm trying to make a seek bar to use with python-vlc.

Update:
The update method seems to work, but it's effects seem to appear only after an event occurs.
I added a button to my code below to demonstrate this.

Code To Duplicate

A short program that isolates and demonstrates the problem (Do not paste your massive program, but instead 10-20 lines that clearly show the problem)

This pre-formatted code block is all set for you to paste in your bit of code:

# Paste your code here
    
import PySimpleGUI as sg

layout = [[sg.Slider(range=(1, 100), orientation='h', size=(20, 20), default_value=1, disable_number_display = True, key = "slider"), sg.Button("click me")]]

window = sg.Window("Window", layout)
while True:
    window.read()
    window['slider'].update(value = 10)
        

Screenshot, Sketch, or Drawing

[jason990420]

window.refresh()
Refreshes the window. Can sometimes get away with a refresh instead of a window.read().
Use this call when you want something to appear in your Window immediately (as soon as this function is called).
Without this call your changes to a Window will not be visible to the user until the next window.read call.

from time import sleep
import PySimpleGUI as sg

layout = [
    [sg.Slider(range=(1, 100), orientation='h', size=(20, 20), key = "slider")],
    [sg.Button("Show after all done"), sg.Button("Show each step")]]

window = sg.Window("Window", layout)
while True:
    event, values = window.read()
    if event in (sg.WINDOW_CLOSED, "Exit"):
        break
    elif event == "Show after all done":
        for i in range(0, 100, 10):
            window['slider'].update(value = 10+i)
            sleep(0.01)
    elif event == "Show each step":
        for i in range(0, 100, 10):
            window['slider'].update(value = 10+i)
            window.refresh()
            sleep(0.01)

window.close()

[sequeirayeslin]

window.refresh()
Refreshes the window. Can sometimes get away with a refresh instead of a window.read().
Use this call when you want something to appear in your Window immediately (as soon as this function is called).
Without this call your changes to a Window will not be visible to the user until the next window.read call.

from time import sleep
import PySimpleGUI as sg

layout = [
    [sg.Slider(range=(1, 100), orientation='h', size=(20, 20), key = "slider")],
    [sg.Button("Show after all done"), sg.Button("Show each step")]]

window = sg.Window("Window", layout)
while True:
    event, values = window.read()
    if event in (sg.WINDOW_CLOSED, "Exit"):
        break
    elif event == "Show after all done":
        for i in range(0, 100, 10):
            window['slider'].update(value = 10+i)
            sleep(0.01)
    elif event == "Show each step":
        for i in range(0, 100, 10):
            window['slider'].update(value = 10+i)
            window.refresh()
            sleep(0.01)

window.close()

Thank you!