SplineTo.cs

using System.Threading.Tasks;
using SkiaSharp;
 
namespace Waher.Layout.Layout2D.Model.Figures.SegmentNodes
{
    public class SplineTo : Point, ISegment, IDirectedElement
    {
        public SplineTo(Layout2DDocument Document, ILayoutElement Parent)
            : base(Document, Parent)
        {
        }
 
        public override string LocalName => "SplineTo";
 
        public override ILayoutElement Create(Layout2DDocument Document, ILayoutElement Parent)
        {
            return new SplineTo(Document, Parent);
        }
 
        public virtual Task Measure(DrawingState State, PathState PathState)
        {
            if (this.defined)
                PathState.SetSplineVertex(this.xCoordinate, this.yCoordinate);
        
            return Task.CompletedTask;
        }
 
        public virtual Task Draw(DrawingState State, PathState PathState, SKPath Path)
        {
            if (this.defined)
                this.splineCurve = PathState.SetSplineVertex(this.xCoordinate, this.yCoordinate);
        
            return Task.CompletedTask;
        }
 
        protected PathSpline splineCurve;
 
        public bool TryGetStart(out float X, out float Y, out float Direction)
        {
            if (this.splineCurve is null)
            {
                X = Y = Direction = 0;
                return false;
            }
            else
                return this.splineCurve.TryGetStart(out X, out Y, out Direction);
        }
 
        public bool TryGetEnd(out float X, out float Y, out float Direction)
        {
            if (this.splineCurve is null)
            {
                X = Y = Direction = 0;
                return false;
            }
            else
                return this.splineCurve.TryGetEnd(out X, out Y, out Direction);
        }
 
    }
}