content: /*
   * Copyright (C) 2016 Actinarium
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.actinarium.rhythm;
  
  /**
   * An object that can contain other spec layers. Extends {@link RhythmSpecLayer}, therefore must know how to draw itself
   * (usually just iterate over children and draw them in order within provided bounds).
   *
   * @author Paul Danyliuk
   */
  public interface RhythmSpecLayerParent extends RhythmSpecLayer {
  
      /**
       * Add layer to this parent. Since this is mostly intended for initial configuration, it is NOT mandatory that
       * implementations of this method trigger redraw.
       *
       * @param layer Layer to add
       * @return this for chaining
       */
      RhythmSpecLayerParent addLayer(RhythmSpecLayer layer);
  
  }
  