OneCoordinate.cs

using System;
using SkiaSharp;
using System.Xml;
using System.Threading.Tasks;
 
namespace Waher.Script.Graphs.Canvas2D.Operations
{
    public abstract class OneCoordinate : CanvasOperation
    {
        private float x;
        private float y;
 
        public OneCoordinate()
        {
        }
 
        public OneCoordinate(float X, float Y)
        {
            this.x = X;
            this.y = Y;
        }
 
        public float X => this.x;
 
        public float Y => this.y;
 
        public override bool Equals(object obj)
        {
            return (obj is OneCoordinate Obj &&
                this.x == Obj.x &&
                this.y == Obj.y);
        }
 
        public override int GetHashCode()
        {
            int Result = this.x.GetHashCode();
            Result ^= Result << 5 ^ this.y.GetHashCode();
            return Result;
        }
 
        public override void ExportGraph(XmlWriter Output)
        {
            Output.WriteAttributeString("x", Expression.ToString(this.x));
            Output.WriteAttributeString("y", Expression.ToString(this.y));
        }
 
        public override Task ImportGraph(XmlElement Xml, Variables _)
        {
            foreach (XmlAttribute Attr in Xml.Attributes)
            {
                switch (Attr.Name)
                {
                    case "x":
                        if (Expression.TryParse(Attr.Value, out float Value))
                            this.x = Value;
                        break;
 
                    case "y":
                        if (Expression.TryParse(Attr.Value, out Value))
                            this.y = Value;
                        break;
                }
            }
 
            return Task.CompletedTask;
        }
    }
}