func (s *settingsMap) SetHook(name string, hook func(...interface{})) event.Connection {
s.mutex.Lock()
defer s.mutex.Unlock()
if hook == nil {
panic("received nil hook function")
}
ev, ok := s.hooks[name]
if !ok {
ev = event.New(false)
s.hooks[name] = ev
}
return ev.Connect(hook)
}
func (ac *Controller) OnUpdate(listener func(...interface{})) event.Connection {
if ac.onUpdate == nil {
ac.onUpdate = event.New(true)
}
return ac.onUpdate.Connect(listener)
}
// OnProgress is an event that is fired when progress has been made on the
// download. Four arguments are passed to the listener:
//
// `name`: A string identifying the item being downloaded.
//
// `progress`: An int64 indicating the amount of bytes downloaded so far.
//
// `total`: An int64 indicating the total size of the download. This may be
// -1, indicating an unknown size.
//
// `err`: An error, if one has occurred. If the download is finished, the
// error will be io.EOF. If the download was closed before it was finished,
// the error will be ErrClosed.
func (dl *Download) OnProgress(listener func(...interface{})) event.Connection {
if dl.onProgress == nil {
dl.onProgress = event.New(false)
}
return dl.onProgress.Connect(listener)
}