AlertDialog.choose

void choose(gtk.window.Window parent =  null,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

This function shows the alert to the user.

The callback will be called when the alert is dismissed. It should call [gtk.alert_dialog.AlertDialog.chooseFinish] to obtain the result.

It is ok to pass NULL for the callback if the alert does not have more than one button. A simpler API for this case is [gtk.alert_dialog.AlertDialog.show].

Parameters

`parent`	the parent [gtk.window.Window]
`cancellable`	a [gio.cancellable.Cancellable] to cancel the operation
`callback`	a callback to call when the operation is complete