Imports fyne.io/fyne/v2 fyne.io/fyne/v2/app fyne.io/fyne/v2/canvas fyne.io/fyne/v2/cmd/fyne_demo/data fyne.io/fyne/v2/container fyne.io/fyne/v2/data/binding fyne.io/fyne/v2/dialog fyne.io/fyne/v2/layout fyne.io/fyne/v2/storage fyne.io/fyne/v2/theme fyne.io/fyne/v2/widget Standard library imports bufio encoding/json errors flag image/color io/ioutil log math path/filepath strconv time