How to dynamic add a column to container.NewGridWithColumns() - go

Question

How can I add an extra column to a container.NewGridWithColumns in Go/Fyne?
I have a number of items (containers) rendered in a ColumnGrid. Then via a dialog I want to add an item. The problem is that I can not find a way to extend the original ColumnGrid.
My code:
func main() {
a := app.New()
w = a.NewWindow("myApp")
window = container.NewBorder(toolbar(), footer(), nil, nil, content())
w.SetContent(window)
w.ShowAndRun()
}
func content() *fyne.Container {
top := topRow()
bottom := bottomRow()
return container.NewGridWithRows(2, top, bottom)
}
var items []*fyne.Container
func bottomRow() *fyne.Container {
items = nil
db := sql.NewDB()
list, err := db.List()
if err != nil {
//handle error
}
for _, l := range list {
items = append(items, renderChart(l))
}
ct = container.NewGridWithColumns(len(items))
for _, item := range items {
ct.Add(item)
}
return ct
}
func dlgAdd() {
entry := widget.NewEntry()
entry.PlaceHolder = "name"
e := container.NewGridWithRows(2, entry)
d := dialog.NewCustomConfirm(
"Add Item",
"Add",
"Cancel",
e,
func(v bool) {
if !v {
//Cancelled
return
}
if entry.Text == "" {
//without input
return
}
//write entry.Text to db
db := sql.NewDB()
err := db.AddItem(entry.Text)
if err != nil {
return
}
//report succes
i := dialog.NewInformation("Succes", fmt.Sprintf("Item %s added", entry.Text), w)
i.Show()
i.SetOnClosed(func() {
Here is the problem, how to add an extra column to the container ct
and then add the item from the dialog to the new column
This will not work
ct = container.NewGridWithColumns(len(ct.Objects) + 1)
items = append(items, renderChart(entry.Text))
for _, item := range items {
ct.Add(item)
}
This will also not work
bottomRow()
w.Canvas().Refresh(window)
})
}, w)
d.Show()
I am really stuck here.

Answer 1

I found the solution :
ct.Add(newObject)
ct.Layout = (container.NewGridWithColumns(len(ct.Objects))).Layout
ct.Refresh()

Answer 2

Yes, Container.Add is the solution, you just needed to save a reference to the Container instead of creating a new one.
Depending on the Layout it may not always be necessary to change it, for example GridWithRows(...) will keep adding columns if the number of items is increased (because the row count is fixed).