Package canvas contains all of the primitive CanvasObjects that make up a Fyne GUI
The types implemented in this package are used as building blocks in order to build higher order functionality. These types are designed to be non-interactive, by design. If additional functonality is required, it’s usually a sign that this type should be used as part of a custom Widget.
func Refresh(obj fyne.CanvasObject)
Refresh instructs the containing canvas to refresh the specified obj.