Tree widget: First selected node stays highlighted after switching selection

[SeyRyuu]

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 running the tree widget example from the Fyne documentation, selecting a tree node (e.g., a) and then selecting a different one (e.g., c) causes the new selection to appear correctly with the blue highlight. However, the first selected node (a) remains highlighted in a light grey color, as if it is still hovered.

How to reproduce

1. Run the Fyne tree example code, also attached below
2. Click on node a - it gets selected with a blue highlight
3. Click on node c - it becomes blue as expected, but node a remains light grey (on hover color)

Screenshots

Example code

package main

import (
    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/widget"
)

func main() {
    myApp := app.New()
    myWindow := myApp.NewWindow("Table Widget")

    tree := widget.NewTree(
        func(id widget.TreeNodeID) []widget.TreeNodeID {
            switch id {
            case "":
                return []widget.TreeNodeID{"a", "b", "c"}
            case "a":
                return []widget.TreeNodeID{"a1", "a2"}
            }
            return []string{}
        },
        func(id widget.TreeNodeID) bool {
            return id == "" || id == "a"
        },
        func(branch bool) fyne.CanvasObject {
            if branch {
                return widget.NewLabel("Branch template")
            }
            return widget.NewLabel("Leaf template")
        },
        func(id widget.TreeNodeID, branch bool, o fyne.CanvasObject) {
            text := id
            if branch {
                text += " (branch)"
            }
            o.(*widget.Label).SetText(text)
        })

    myWindow.SetContent(tree)
    myWindow.ShowAndRun()
}

Fyne version

v2.6.1

Go compiler version

1.24.2

Operating system and version

Linux pop_os 24.04 amd64 Wayland, Windows 11 amd64

Additional Information

No response

[Jacalz]

Thanks for the report. The issue is fixed on the develop branch for v2.7.0.