添加项目文件。

MetroGauges/Controls/BlockShaps/BlockEllipse.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using netDxf;
+using netDxf.Tables;
+
+namespace MetroGauges.Controls.BlockShaps
+{
+    public class BlockEllipse : BaseShap
+    {
+
+        public BlockEllipse(FrameworkElement shap) : base(shap)
+        {
+        }
+
+        public override void CopyBlock()
+        {
+            Path path = shapeitem as Path;
+            
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            shapeitem.Tag = new Point() { X = ellipseGeometry.Center.X, Y = ellipseGeometry.Center.Y }; //存储当前图形坐标
+
+            ShapDataContext shapDataContext = shapeitem.DataContext as ShapDataContext;
+
+            EllipseGeometry geometry = new EllipseGeometry();
+            geometry.Center = new Point() { X = ellipseGeometry.Center.X/ shapDataContext.ShapScaleRate, Y = ellipseGeometry.Center.Y/ shapDataContext.ShapScaleRate };
+
+            geometry.RadiusX = ellipseGeometry.RadiusX / shapDataContext.ShapScaleRate;
+            geometry.RadiusY = ellipseGeometry.RadiusY / shapDataContext.ShapScaleRate;
+
+            shapDataContext.OringLocation = geometry;
+        }
+
+        public override FrameworkElement DirectionShap(Point dirPoint)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void DrawDxfBlocks(DxfDocument dxf, Layer layer)
+        {
+            Path path = shapeitem as Path;
+
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            Vector3 center = new Vector3() { X = ellipseGeometry.Center.X * m_ScaleRale, Y = -ellipseGeometry.Center.Y * m_ScaleRale };
+            if (ellipseGeometry.RadiusX == ellipseGeometry.RadiusY) // 圆
+            {
+                netDxf.Entities.Circle circle = new netDxf.Entities.Circle(center, ellipseGeometry.RadiusX * m_ScaleRale);
+                circle.Layer = layer;
+                dxf.AddEntity(circle);
+            }
+            else //椭圆
+            {
+                netDxf.Entities.Ellipse ellipse = new netDxf.Entities.Ellipse(center, ellipseGeometry.RadiusX * m_ScaleRale, ellipseGeometry.RadiusY * m_ScaleRale);
+                //ellipse.Rotation = 30;
+
+                ellipse.Layer = layer;
+                dxf.AddEntity(ellipse);
+            }
+        }
+
+        public override List<Point> GetPoints()
+        {
+            List<Point> points = new List<Point>();
+            Path path = shapeitem as Path;
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+
+            Point point = new Point();
+            point.X = ellipseGeometry.Center.X - ellipseGeometry.RadiusX ;
+            point.Y = ellipseGeometry.Center.Y + ellipseGeometry.RadiusY ;
+
+            points.Add(point);
+
+            return points;
+        }
+
+        public override void MoveBlock( Point currentPoint, System.Windows.Point dragPoint)
+        {
+            double moveX = currentPoint.X - dragPoint.X;
+            double moveY = currentPoint.Y - dragPoint.Y;
+
+
+            Path path = shapeitem as Path;
+
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            Point p = (Point)shapeitem.Tag;
+
+
+            if ((shapeitem.DataContext as ShapDataContext).IsDirection)
+            {
+                moveX = -moveX;
+            }
+            Point center = new Point() { X = p.X + moveX, Y = p.Y + moveY };
+            ellipseGeometry.Center = center;
+
+            
+
+        }
+
+        public override void MoveByX(double x)
+        {
+
+            Path path = shapeitem as Path;
+
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            Point p = (Point)shapeitem.Tag;
+
+            Point center = new Point() { X = p.X + x/m_ScaleRale, Y = ellipseGeometry.Center.Y };
+            ellipseGeometry.Center = center;
+        }
+
+        public override void MoveByY(double y)
+        {
+            Path path = shapeitem as Path;
+
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            Point p = (Point)shapeitem.Tag;
+
+            Point center = new Point() { X = ellipseGeometry.Center.X, Y = p.Y-y / m_ScaleRale };
+            ellipseGeometry.Center = center;
+        }
+
+        public override void ScaleBlock(double rate)
+        {
+            Path path = shapeitem as Path;
+
+            EllipseGeometry ellipseGeometry = path.Data as EllipseGeometry;
+            (shapeitem.DataContext as ShapDataContext).ShapScaleRate = rate;
+
+            EllipseGeometry ellipseGeometry1 = (shapeitem.DataContext as ShapDataContext).OringLocation as EllipseGeometry;  //path.Data as EllipseGeometry;
+            Point p = ellipseGeometry1.Center;
+
+            Point center = new Point() { X = p.X * rate, Y = p.Y *rate };
+            ellipseGeometry.Center = center;
+            ellipseGeometry.RadiusX = ellipseGeometry1.RadiusX * rate;
+            ellipseGeometry.RadiusY = ellipseGeometry1.RadiusY * rate;
+
+
+        }
+    }
+}