C# GraphicsPath.AddClosedCurve方法代碼示例

        public override RectangleF ReturnBounds()
        {
            Point[] points = (Point[])pointsList.ToArray(typeof(Point));
            GraphicsPath path = new GraphicsPath();
            path.AddClosedCurve(points, 1);

            path.Transform(this.TMatrix.TransformationMatrix);
            return path.GetBounds();
        }

        protected override void UpdatePath()
        {
            if (this.Points == null || this.Points.Length == 0) return;

            InternalPath = new GraphicsPath();
            InternalPath.AddClosedCurve(this.Points);

            Matrix mtx = new Matrix();
            mtx.RotateAt(this.Rotation, InternalRotationBasePoint);
            InternalPath.Transform(mtx);
        }

 private void Type(Control sender, int p_1, double p_2)
 {
     GraphicsPath oPath = new GraphicsPath();
     oPath.AddClosedCurve(new Point[] { new Point(0, sender.Height / p_1),
         new Point(sender.Width / p_1, 0),
         new Point(sender.Width - sender.Width / p_1, 0), 
         new Point(sender.Width, sender.Height / p_1), 
         new Point(sender.Width, sender.Height - sender.Height / p_1),
         new Point(sender.Width - sender.Width / p_1, sender.Height),
         new Point(sender.Width / p_1, sender.Height),
         new Point(0, sender.Height - sender.Height / p_1) }, (float)p_2);
     sender.Region = new Region(oPath);
 }

        public override void DrawYourSelf(Graphics graphics)
        {
            if (pointsList.Count < 4) return;
            Point[] points = (Point[])pointsList.ToArray(typeof(Point));

            GraphicsPath path = new GraphicsPath();
            path.AddClosedCurve(points, 1);
            path.Transform(this.TMatrix.TransformationMatrix);

            Pen pen = new Pen(this.BorderColor, this.BorderWidth);
            if (IS_FILLED)
            {
                SolidBrush brush = new SolidBrush(this.FillColor);
                graphics.FillPath(brush, path);
            }
            graphics.DrawPath(pen, path);

            if (this.Selected)
            {
                this.selectionUnit = new CoveringRectangle(Rectangle.Round(ReturnBounds()));
                this.selectionUnit.DrawYourSelf(graphics);
            }
        }

		static private GraphicsPath ClosedCurve ()
		{
			GraphicsPath path = new GraphicsPath ();
			path.AddClosedCurve (new Point[4] { 
				new Point (20, 100), new Point (70, 10),
				new Point (130, 200), new Point (180, 100)
				});
			return path;
		}

		public void AddClosedCurve_PointFArr()
		{
			PointF [] points = new PointF [] {	new PointF(20.01f, 100.1f),
												new PointF(40.02f, 75.2f),
												new PointF(60.03f, 125.3f),
												new PointF(80.04f, 100.4f),
												new PointF(100.05f, 50.5f),
												new PointF(120.06f, 150.6f),
												new PointF(140.07f, 100.7f)};

			path = new GraphicsPath();
			path.AddClosedCurve(points);

			Assert.AreEqual (22, path.PointCount);

			PointF [] expectedPoints = new PointF [] {	new PointF(20.01f, 100.1f), 
														new PointF(3.334998f, 95.84999f), 
														new PointF(33.35f, 70.99999f), 
														new PointF(40.02f, 75.2f), 
														new PointF(46.69f, 79.39999f), 
														new PointF(53.36f, 121.1f), 
														new PointF(60.03f, 125.3f), 
														new PointF(66.7f, 129.5f), 
														new PointF(73.37f, 112.8667f), 
														new PointF(80.04f, 100.4f), 
														new PointF(86.71f, 87.93333f), 
														new PointF(93.38f, 42.13333f), 
														new PointF(100.05f, 50.5f), 
														new PointF(106.72f, 58.86666f), 
														new PointF(113.39f, 142.2333f), 
														new PointF(120.06f, 150.6f), 
														new PointF(126.73f, 158.9667f), 
														new PointF(156.745f, 109.1167f), 
														new PointF(140.07f, 100.7f), 
														new PointF(123.395f, 92.28333f), 
														new PointF(36.685f, 104.35f), 
														new PointF(20.01f, 100.1f)};
			
			for(int i = 0; i < path.PointCount; i++) {
				DrawingTest.AssertAlmostEqual(expectedPoints [i], path.PathPoints [i]);
			}

			byte [] expectedTypes = new byte [] {	(byte) PathPointType.Start, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) PathPointType.Bezier3, 
													(byte) (PathPointType.Bezier | PathPointType.CloseSubpath)};

			for (int i=0; i < expectedTypes.Length; i++) {
				Assert.AreEqual (expectedTypes [i], path.PathTypes [i]);
			}	

			t.Graphics.DrawPath (p, path);
			t.Show ();
			//t.AssertCompare ();
		}

        private void AddClosedCurve1(Graphics g)
        {
            // Creates a symetrical, closed curve.
            Point[] myArray =
            {
                new Point(20,100),
                new Point(40,150),
                new Point(60,125),
                new Point(40,100),
                new Point(60,75),
                new Point(40,50)
            };

            // Create a new path and add curve.
            GraphicsPath myPath = new GraphicsPath();
            myPath.AddClosedCurve(myArray, 0.5f);
            Pen myPen = new Pen(Color.Black, 2);

            // Draw the path to screen.
            g.DrawPath(myPen, myPath);
        }

		public void GetBounds_Empty_ClosedCurve ()
		{
			GraphicsPath gp = new GraphicsPath ();
			gp.AddClosedCurve (new Point[4] { new Point (20, 100), new Point (70, 10),
				new Point (130, 200), new Point (180, 100) });
#if false
			// so far from reality that it's totally useless
			Assert.AreEqual (1.666666f, rect.X, 0.00001, "Bounds.X");
			Assert.AreEqual (-6.66666f, rect.Y, 1, "Bounds.Y");
			Assert.AreEqual (196.6666f, rect.Width, 1, "Bounds.Width");
			Assert.AreEqual (221.6666f, rect.Height, 1, "Bounds.Height");
#endif
			gp.Dispose ();
		}

		public void StartClose_AddClosedCurve ()
		{
			GraphicsPath path = new GraphicsPath ();
			path.AddLine (1, 1, 2, 2);
			path.AddClosedCurve (new Point[3] { new Point (1, 1), new Point (2, 2), new Point (3, 3) });
			path.AddLine (10, 10, 20, 20);
			byte[] types = path.PathTypes;
			// check first types
			Assert.AreEqual (0, types[0], "start/Line");
			Assert.AreEqual (0, types[2], "start/ClosedCurve");
			// check last types
			Assert.AreEqual (131, types[path.PointCount - 3], "end/ClosedCurve");
			Assert.AreEqual (0, types[path.PointCount - 2], "start/Line3");
			Assert.AreEqual (1, types[path.PointCount - 1], "end/Line3");
		}

		public void AddClosedCurve_PointF_1 ()
		{
			GraphicsPath gp = new GraphicsPath ();
			gp.AddClosedCurve (new PointF[1] { new PointF (1f, 1f) });
		}

		public void AddClosedCurve_PointF_3 ()
		{
			GraphicsPath gp = new GraphicsPath ();
			gp.AddClosedCurve (new PointF[3] { new PointF (1f, 1f), new PointF (2f, 2f), new PointF (3f, 3f) });
			CheckClosedCurve (gp);
		}

		public void AddClosedCurve_Point_1 ()
		{
			GraphicsPath gp = new GraphicsPath ();
			gp.AddClosedCurve (new Point[1] { new Point (1, 1) });
		}

		public void AddClosedCurve_Point_3 ()
		{
			GraphicsPath gp = new GraphicsPath ();
			gp.AddClosedCurve (new Point[3] { new Point (1, 1), new Point (2, 2), new Point (3, 3) });
			CheckClosedCurve (gp);
		}

		/// <summary>
		/// Performs a hit test on the <see cref="Graphic"/> at a given point.
		/// </summary>
		/// <param name="point">The mouse position in destination coordinates.</param>
		/// <returns>
		/// <b>True</b> if <paramref name="point"/> "hits" the <see cref="Graphic"/>,
		/// <b>false</b> otherwise.
		/// </returns>
		public override bool HitTest(Point point)
		{
			base.CoordinateSystem = CoordinateSystem.Destination;
			try
			{
				using (var gp = new GraphicsPath())
				using (var pen = new Pen(Color.Black, HitTestDistance))
				{
					PointF[] pathPoints = GetCurvePoints(_points);
					if (_points.IsClosed)
						gp.AddClosedCurve(pathPoints);
					else
						gp.AddCurve(pathPoints);
					return gp.IsOutlineVisible(point, pen);
				}
			}
			finally
			{
				base.ResetCoordinateSystem();
			}
		}

			public override IGripManipulationHandle[] GetGrips(double pageScale, int gripLevel)
			{
				if (gripLevel <= 1)
				{
					ClosedCardinalSpline ls = (ClosedCardinalSpline)_hitobject;
					PointF[] pts = new PointF[ls._curvePoints.Count];
					var offset = ls.Location.AbsoluteVectorPivotToLeftUpper;
					for (int i = 0; i < pts.Length; i++)
					{
						pts[i] = (PointF)(ls._curvePoints[i] + offset);
						var pt = ls._transformation.TransformPoint(pts[i]);
						pt = this.Transformation.TransformPoint(pt);
						pts[i] = pt;
					}

					IGripManipulationHandle[] grips = new IGripManipulationHandle[gripLevel == 0 ? 1 : 1 + ls._curvePoints.Count];

					// Translation grips
					GraphicsPath path = new GraphicsPath();
					path.AddClosedCurve(pts, (float)ls._tension);
					path.Widen(new Pen(Color.Black, (float)(6 / pageScale)));
					grips[grips.Length - 1] = new MovementGripHandle(this, path, null);

					// PathNode grips
					if (gripLevel == 1)
					{
						float gripRadius = (float)(3 / pageScale);
						for (int i = 0; i < ls._curvePoints.Count; i++)
						{
							grips[i] = new ClosedCardinalSplinePathNodeGripHandle(this, i, pts[i], gripRadius);
						}
					}
					return grips;
				}
				else
				{
					return base.GetGrips(pageScale, gripLevel);
				}
			}