NewTreeWithData Rendering Issue

[BieHDC]

Checklist

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

Describe the bug

When making a widget.NewTreeWithData with the binding to a tree fyne sometimes doesnt render items above the selected one except for one above. See Video.

How to reproduce

1. Run Example Code
2. Select the 2nd item, then the 3rd, then the 4th
3. If the bug didnt trigger, close the application and do 2. again (See Video)

Screenshots

minex.mp4

Example code

package main

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/data/binding"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.New()
	w := a.NewWindow("BUG DEMO")
	w.Resize(fyne.NewSize(800, 600))
	w.SetContent(makeMain(a, w))
	w.Show()
	a.Run()
}

func makeMain(a fyne.App, w fyne.Window) fyne.CanvasObject {
	tree := binding.NewStringTree()
	treewg := widget.NewTreeWithData(
		tree,
		func(_ bool) fyne.CanvasObject {
			return widget.NewLabel("example str")
		},
		func(data binding.DataItem, _ bool, obj fyne.CanvasObject) {
			l := obj.(*widget.Label)
			d, err := data.(binding.String).Get()
			if err != nil {
				panic(err)
			}
			l.SetText(d)
		},
	)

	for _, str := range []string{"aaa", "bbb", "ccc", "ddd", "eee"} {
		tree.Append(binding.DataTreeRootID, str, str+str)
	}

	return container.NewPadded(treewg)
}

Fyne version

2.4.1

Go compiler version

1.21.3

Operating system and version

linux/amd64

Additional Information

Does NOT happen with widget.NewListWithData

[dozn]

The example code on https://developer.fyne.io/collection/tree exhibits the same behaviour (although it's worth noting the container.NewPadded() in the OP makes the upper portion disappear completely sometimes as well).

[billytoe]

go 1.21.5

fyne.io/fyne/v2 v2.4.3

macOS 14.0

Also, when placing two tree controls on the interface, one of them may work properly while the other sometimes encounters this bug and sometimes doesn't. This bug usually appears when a new execution interface is launched.

[ErikKalkoken]

Can confirm this bug is occurring on both Windows and Linux:

OS	Fyne	Go
Windows 10 22H2	Fyne 2.4.5	Go 1.22.1
Ubuntu 22.04.4 LTS	Fyne 2.4.5	Go 1.22.1

The bug happens regularly around ever 5 times I start my app. I was planning to use this widget, so keeping my fingers crossed for a fix soon.

[LidiYuan]

I also found this issue on unbuntu18, and the triggering frequency is still very high. Relevant records。 I used version 2.5 for the relevant records. Detailed description reference：
#5082
When can this be resolved, or is there any way to avoid it

[ErikKalkoken]

I also found this issue on unbuntu18, and the triggering frequency is still very high. Relevant records。 I used version 2.5 for the relevant records. Detailed description reference： #5082 When can this be resolved, or is there any way to avoid it

The no data variant (widget.NewTree()) works fine, so one way to avoid it is to use that variant until the bug is fixed. At least that is what I did in my apps.

[williambrode]

This was fixed with this PR: #5096

[williambrode]

This issue is a duplicate of #5093 - I'm sorry I missed it when opening a new issue.

[williambrode]

If you need the fix right away (as I did) - you can do:
go get fyne.io/fyne/v2@3689a40c581fa9935cbd2cade9beb4ba5726cd78

Though, that could carry some less-tested changes that have recently gone in.