Basic data binding in Go walk - data-binding

Question

I am trying to understand how data binding works in Go walk.
I have reviewed the somewhat complex data binding example, but I am having difficulties implementing a simple, one field data binding.
The code below demonstrates more or less what I am trying to achieve - I want the text label to be bound to the message variable (i.e., to be synchronized with its content) - of course, without the need for me to push changes to the label itself.
package main
import (
"github.com/lxn/walk"
. "github.com/lxn/walk/declarative"
"strconv"
"time"
)
func main() {
var messageLabel *walk.Label
var message string = "Hello"
// Change `message` over 5 seconds
go func() {
for i := 1; i < 6; i++ {
time.Sleep(time.Second)
message = "Counting: " + strconv.Itoa(i)
// I want to make it work
// without this line below
messageLabel.SetText(message)
}
}()
// Build a simple window with a text label
// that is supposed to be bound to the
// contents of the `message` variable
MainWindow{
Title: "Binding Test",
MinSize: Size{300, 50},
Layout: VBox{},
Children: []Widget{
Label{
AssignTo: &messageLabel,
Text: message,
// Text: BindTo{message} // Objective
},
},
}.Run()
}

Answer 1

I didn't see any Databinder code in your snapshot.
In that exanple you mentioned,these code below makes databinding work
DataBinder: DataBinder{
AssignTo: &db,
Name: "animal",
DataSource: animal,
ErrorPresenter: ToolTipErrorPresenter{},
},
It binds the data who calls Bind("Name") to the field with the same name in Datasource which is animal in that example.