FileChooserDialogNew

[shawnl]

no support for FileChooserDialogNew

[juanfgs]

You can use a Dialog and added the FileChooser widget inside the content box:

dialog, err := gtk.DialogNew()
filechooser, err := gtk.FileChooserWidgetNew(gtk.FILE_CHOOSER_ACTION_OPEN)
dialog.AddButton("Share", gtk.RESPONSE_ACCEPT)
dialog.AddButton("Cancel", gtk.RESPONSE_CANCEL)
dialog.SetTitle("Share files")
box, err := dialog.GetContentArea()
box.Add(filechooser)
box.ShowAll()

or FileChooserButtonNew to use the standard Gtk3 File Chooser button (will look better on Gnome 3 environment but I think it doesn't have support for multiple file selection).