fyne.io table databinding example adapted from https://stackoverflow.com/questions/68085584/binding-table-data-in-go-fyne

main.go

package main

import (
	"encoding/json"
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/data/binding"
	"fyne.io/fyne/v2/widget"
	"time"
)

type Todo struct {
	UserID    string `json:"userId,omitempty"`
	ID        string `json:"id,omitempty"`
	Title     string `json:"title,omitempty"`
	Completed string `json:"completed,omitempty"`
}

func main() {
	myApp := app.New()
	myWindow := myApp.NewWindow("Table Widget")
	myWindow.Resize(fyne.Size{
		Width:  600,
		Height: 400,
	})

	var data []Todo

	stringData := `[{"userId":"1","id":"1","title":"mon premier titre", "completed":"this is the completed field"},{"userId":"1","id":"2","title":"mon deuxieme titre", "completed":"this is the completed field"}]`
	json.Unmarshal([]byte(stringData), &data)

	var bindings []binding.DataMap

	for _, todo := range data {
		bindings = append(bindings, binding.BindStruct(&todo))
	}

	list := widget.NewTable(
		func() (int, int) {
			return len(bindings), 4
		},
		func() fyne.CanvasObject {
			return widget.NewLabel("wide content")
		},
		func(i widget.TableCellID, o fyne.CanvasObject) {
			var tmp binding.DataItem
			switch i.Col {
			case 0:
				tmp, _ = bindings[i.Row].GetItem("UserID")
			case 1:
				tmp, _ = bindings[i.Row].GetItem("ID")
			case 2:
				tmp, _ = bindings[i.Row].GetItem("Title")
			case 3:
				tmp, _ = bindings[i.Row].GetItem("Completed")
			}
			o.(*widget.Label).Bind(tmp.(binding.String))
		},
	)

	go func() {
		time.Sleep(time.Duration(3) * time.Second)
		var tmp []Todo
		stringData := `[{"userId":"2","id":"3","title":"updating", "completed":"BOOO"}]`
		json.Unmarshal([]byte(stringData), &tmp)
		for _, todo := range tmp {
			bindings = append(bindings, binding.BindStruct(&todo))
		}
		list.Refresh()
	}()

	myWindow.SetContent(list)
	myWindow.ShowAndRun()
}