/// <summary>
/// 初始化 <see cref="JigsawPiece"/> 类的新实例。
/// </summary>
/// <param name="factory">Direc2D 工厂实例。</param>
/// <param name="path">拼图碎片的轮廓路径。</param>
/// <param name="type">拼图碎片的类型。</param>
public JigsawPiece(Factory factory, Path path, JigsawPieceType type)
{
if (factory == null)
{
throw CommonExceptions.ArgumentNull("factory");
}
if (path == null)
{
throw CommonExceptions.ArgumentNull("path");
}
this.factory = factory;
this.shape = path;
this.originalPath = this.shape.GetGeometryGroup(this.factory);
this.pieceType = type;
this.Visible = true;
this.Frozen = false;
this.State = JigsawPieceState.None;
UpdatePath();
}
/// <summary>
/// 用指定的序列化信息和上下文初始化 <see cref="JigsawPiece"/> 类的新实例。
/// </summary>
/// <param name="info"><see cref="System.Runtime.Serialization.SerializationInfo"/> 对象，
/// 包含序列化 <see cref="JigsawPiece"/> 所需的信息。</param>
/// <param name="context"><see cref="System.Runtime.Serialization.StreamingContext"/> 对象，
/// 该对象包含与 <see cref="JigsawPiece"/> 相关联的序列化流的源和目标。</param>
/// <exception cref="System.ArgumentNullException">info 参数为 <c>null</c>。</exception>
private JigsawPiece(SerializationInfo info, StreamingContext context)
{
if (info == null)
{
throw CommonExceptions.ArgumentNull("info");
}
this.factory = ((JigsawSerializeContext)context.Context).Factory;
this.shape = (Path)info.GetValue("Shape", typeof(Path));
this.pieceType = (JigsawPieceType)info.GetValue("Type", typeof(JigsawPieceType));
this.offset = (Vector2)info.GetValue("Offset", typeof(Vector2));
this.rotate = info.GetInt32("Rotate");
this.rotateRadian = (float)(this.rotate * Math.PI / 180);
this.scale = info.GetSingle("Scale");
this.Next = (JigsawPiece)info.GetValue("Next", typeof(JigsawPiece));
this.Prev = (JigsawPiece)info.GetValue("Prev", typeof(JigsawPiece));
this.Frozen = info.GetBoolean("Frozen");
this.neighbors = (HashSet<JigsawPiece>)info.GetValue("Neighbors", typeof(HashSet<JigsawPiece>));
this.Visible = true;
this.State = JigsawPieceState.None;
// 重新填充路径。
this.originalPath = this.shape.GetGeometryGroup(factory);
// 重新计算转换矩阵。
CalculateMatrix();
UpdatePath();
}
/// <summary>
/// 将指定的拼图碎片与当前的拼图碎片合并。不检查两个拼图碎片是否可以被合并。
/// </summary>
/// <param name="piece">要合并的拼图碎片。</param>
public void Merge(JigsawPiece piece)
{
// 更新相邻拼图碎片信息。
foreach (JigsawPiece p in piece.neighbors)
{
p.neighbors.Remove(piece);
p.neighbors.Add(this);
}
this.neighbors.UnionWith(piece.neighbors);
this.neighbors.Remove(this);
// 更新形状。
float sum = this.shape.Weight + piece.shape.Weight;
this.offset = new Vector2((this.offset.X * this.shape.Weight + piece.offset.X * piece.shape.Weight) / sum,
(offset.Y * this.shape.Weight + piece.offset.Y * piece.shape.Weight) / sum);
this.shape.Merge(piece.shape);
// 更新路径。
GeometryGroup newGroup = SharpDXUtility.Merge(this.originalPath, piece.originalPath);
this.originalPath.Dispose();
this.originalPath = newGroup;
this.CalculateMatrix();
this.UpdatePath();
if (piece.PieceType == JigsawPieceType.Border)
{
this.pieceType = JigsawPieceType.Border;
}
piece.Dispose();
}