UMD.HCIL.Piccolo.PNode.IsDescendentOf C# (CSharp) Method

		public virtual bool IsDescendentOf(PNode node) {
			PNode p = parent;
			while (p != null) {
				if (p == node) {
					return true;
				}
				p = p.Parent;
			}
			return false;
		}
		

		/// <summary>
		/// Returns true if the given node is a neighbor of the current focus in the
		/// specified direction.
		/// </summary>
		/// <param name="aNode">The node to test.</param>
		/// <param name="aDirection">The direction in which to perform the test.</param>
		/// <returns>
		/// True if the given node is a neighbor in the specified direction; otherwise,
		/// false.
		/// </returns>
		public virtual bool NodeIsNeighborInDirection(PNode aNode, Direction aDirection) {
			switch (aDirection) {
				case Direction.In: {
					return aNode.IsDescendentOf(focusNode);
				}

				case Direction.Out: {
					return aNode.IsAncestorOf(focusNode);
				}
			
				default: {
					if (aNode.IsAncestorOf(focusNode) || aNode.IsDescendentOf(focusNode)) {
						return false;
					}
					break;
				}
			}

			PointF highlightCenter = (PointF) NODE_TO_GLOBAL_NODE_CENTER_MAPPING[focusNode];
			PointF nodeCenter = (PointF) NODE_TO_GLOBAL_NODE_CENTER_MAPPING[aNode];

			float ytest1 = nodeCenter.X - highlightCenter.X + highlightCenter.Y;
			float ytest2 = -nodeCenter.X + highlightCenter.X + highlightCenter.Y;

			switch (aDirection) {
				case Direction.North: {
					if (nodeCenter.Y < highlightCenter.Y) {
						if (nodeCenter.Y < ytest1 && nodeCenter.Y < ytest2) {
							return true;
						}
					}
					break;
				}

				case Direction.East: {
					if (nodeCenter.X > highlightCenter.X) {
						if (nodeCenter.Y < ytest1 && nodeCenter.Y > ytest2) {
							return true;
						}
					}
					break;
				}

				case Direction.South: {
					if (nodeCenter.Y > highlightCenter.Y) {
						if (nodeCenter.Y > ytest1 && nodeCenter.Y > ytest2) {
							return true;
						}
					}
					break;
				}
				case Direction.West: {
					if (nodeCenter.X < highlightCenter.X) {
						if (nodeCenter.Y > ytest1 && nodeCenter.Y < ytest2) {
							return true;
						}
					}
					break;
				}
			}
			return false;
		}