scalismo.ui.api.HandleCallback.scala Maven / Gradle / Ivy

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/*
 * Copyright (C) 2016  University of Basel, Graphics and Vision Research Group
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package scalismo.ui.api

/**
 * This typeclass needs to be implemented if callbacks should be allowed for a view V
 */
protected[api] trait HandleCallback[V] {
  // calls function f if a node with type A has been added to the group g
  def registerOnAdd[R](g: Group, f: V => R): Unit

  // calls function f if a node with type A has been removed from the group g
  def registerOnRemove[R](g: Group, f: V => R): Unit

}

object HandleCallback {
  def apply[A](implicit a: HandleCallback[A]): HandleCallback[A] = a

}