container.NewScroll(myCheckGroup) issue when the number of check boxes increases

[FredPont]

Checklist

• [X] I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• [X] This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

container.NewScroll(myCheckGroup) can display a small number of checkboxes, for example 100. When this number increases, for example 200, a random bug appears sometime the scroll is displayed sometime not. (see video)

How to reproduce

Use the example code and increase the number of checkboxes in the loop line 19 from 100 to 200 for example. When the number of checkboxes increases you will see a black window. (see video)

Screenshots

bug_fyne_scroll_toy.webm

Example code

package main

import (
    "fmt"

    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/container"
    "fyne.io/fyne/v2/layout"
    "fyne.io/fyne/v2/widget"
)

func main() {
    myApp := app.New()
    myWindow := myApp.NewWindow("Window with Checkboxes in Scroll")

    var myCheckboxLabels []string

    for i := 1; i <= 200; i++ {
        box := fmt.Sprintf("box%d", i)
        myCheckboxLabels = append(myCheckboxLabels, box)
    }

    // Create a CheckGroup widget with the checkbox labels
    myCheckGroup := widget.NewCheckGroup(myCheckboxLabels, func(selected []string) {
        // Handle the checkbox selection change event
    })

    // Create a scrolling container and add the checkboxes to it
    scroller := container.NewScroll(
        container.NewVBox(
            myCheckGroup,
        ),
    )

    // Add the scrolling container to the window
    myWindow.SetContent(
        fyne.NewContainerWithLayout(
            layout.NewGridLayout(1),
            scroller,
        ),
    )

    myWindow.Resize(fyne.NewSize(300, 400))
    myWindow.ShowAndRun()
}

Fyne version

fyne.io/fyne/v2 v2.3.6-0.20230726025429-1646c13c618e

Go compiler version

1.20.6

Operating system and version

system : Distributor ID: Ubuntu Description: Ubuntu 22.04.2 LTS Release: 22.04
Subsystem: Dell TU104GL [Quadro RTX 4000] [1028:12a0] Kernel driver in use: nvidia Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

Additional Information

No response

[matwachich]

Just FYI, it works on Windows 10 with develop v2.3.6-0.20230722221208-8955ea89b1bd

[Jacalz]

@matwachich I'm confused. What does that comment have to do with the issue in question?

[matwachich]

I just saw all the rubish... I think it's because I answered by mail.

I just wanted to say that the code works fine on windows. So it could be a linux related issue.

[Jacalz]

Ah, I see. I would advise against answering over mail on GitHub. It rarely does what you want it to. Will have a look tomorrow and see if I can replicate.

[Jacalz]

@FredPont Are you only seeing this on develop and not the latest stable release? I have no problem using 200 checkboxes here and looking at your video I think it might be a duplicate of https://github.com/fyne-io/fyne/issues/4086.

[FredPont]

@Jacalz I did a test on another computer : EndeavourOS up to date 01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 630] (rev a1)

With : fyne.io/fyne/v2 v2.3.6-0.20230802221337-a3d63a1ab0cd and 300 checkboxes, I reproduce the bug after 5 attempts

with : fyne.io/fyne/v2 v2.3.5 I do not manage to reproduce the bug after 10 attempts

[andydotxyz]

Looking at the video this does not relate to scroll I don't think - it looks like the UI isn't managing to process that many items. I would highly recommend using List which is designed for handling lots of off-screen data. Your CheckGroup+Scroll is rendering the entirety of a massive UI and putting it behind a scroll bar so it looks small - much less efficient.

[andydotxyz]

But let's come back and see after #4086 fix lands, just to check.