text: /* Copyright (c) 2016 Google Inc.
   *
   * 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.
   */
  
  #import <Foundation/Foundation.h>
  #import "GQTPointQuadTreeItem.h"
  #import "GQTBounds.h"
  
  @interface GQTPointQuadTree : NSObject
  
  
  /**
   * Create a QuadTree with bounds. Please note, this class is not thread safe.
   *
   * @param bounds The bounds of this PointQuadTree. The tree will only accept items that fall
                   within the bounds. The bounds are inclusive.
   */
  - (id)initWithBounds:(GQTBounds)bounds;
  
  /**
   * Create a QuadTree with the inclusive bounds of (-1,-1) to (1,1).
   */
  - (id)init;
  
  /**
   * Insert an item into this PointQuadTree.
   *
   * @param item The item to insert. Must not be nil.
   * @return |NO| if the item is not contained within the bounds of this tree.
   *         Otherwise adds the item and returns |YES|.
   */
  - (BOOL)add:(id<GQTPointQuadTreeItem>)item;
  
  /**
   * Delete an item from this PointQuadTree.
   *
   * @param item The item to delete.
   * @return |NO| if the items was not found in the tree, |YES| otherwise.
   */
  - (BOOL)remove:(id<GQTPointQuadTreeItem>)item;
  
  /**
   * Delete all items from this PointQuadTree.
   */
  - (void)clear;
  
  /**
   * Retreive all items in this PointQuadTree within a bounding box.
   *
   * @param bounds The bounds of the search box.
   * @return The collection of items within |bounds|, returned as an NSArray
   *         of id<GQTPointQuadTreeItem>.
   */
  - (NSArray *)searchWithBounds:(GQTBounds)bounds;
  
  /**
   * The number of items in this entire tree.
   *
   * @return The number of items.
   */
  - (NSUInteger)count;
  
  @end
  
  