99 lines
2.7 KiB
C#
99 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Microsoft.Research.DynamicDataDisplay.Charts.Shapes;
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using System.Windows.Media;
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using System.Windows;
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using Microsoft.Research.DynamicDataDisplay;
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using Microsoft.Research.DynamicDataDisplay.Charts.NewLine;
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namespace Microsoft.Research.DynamicDataDisplay.Charts.Shapes
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{
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public class ViewportPolyBezierCurve : ViewportPolylineBase
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="ViewportPolyBezierCurve"/> class.
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/// </summary>
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public ViewportPolyBezierCurve() { }
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public PointCollection BezierPoints
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{
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get { return (PointCollection)GetValue(BezierPointsProperty); }
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set { SetValue(BezierPointsProperty, value); }
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}
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public static readonly DependencyProperty BezierPointsProperty = DependencyProperty.Register(
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"BezierPoints",
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typeof(PointCollection),
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typeof(ViewportPolyBezierCurve),
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new FrameworkPropertyMetadata(null, OnPropertyChanged));
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private bool buildBezierPoints = true;
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public bool BuildBezierPoints
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{
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get { return buildBezierPoints; }
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set { buildBezierPoints = value; }
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}
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bool updating = false;
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protected override void UpdateUIRepresentationCore()
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{
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if (updating) return;
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updating = true;
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var transform = Plotter.Viewport.Transform;
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PathGeometry geometry = PathGeometry;
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PointCollection points = Points;
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geometry.Clear();
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if (BezierPoints != null)
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{
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points = BezierPoints;
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var screenPoints = points.DataToScreen(transform).ToArray();
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PathFigure figure = new PathFigure();
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figure.StartPoint = screenPoints[0];
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figure.Segments.Add(new PolyBezierSegment(screenPoints.Skip(1), true));
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geometry.Figures.Add(figure);
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geometry.FillRule = this.FillRule;
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}
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else if (points == null) { }
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else
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{
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PathFigure figure = new PathFigure();
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if (points.Count > 0)
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{
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Point[] bezierPoints = null;
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figure.StartPoint = points[0].DataToScreen(transform);
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if (points.Count > 1)
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{
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Point[] screenPoints = points.DataToScreen(transform).ToArray();
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bezierPoints = BezierBuilder.GetBezierPoints(screenPoints).Skip(1).ToArray();
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figure.Segments.Add(new PolyBezierSegment(bezierPoints, true));
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}
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if (bezierPoints != null && buildBezierPoints)
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{
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Array.Resize(ref bezierPoints, bezierPoints.Length + 1);
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Array.Copy(bezierPoints, 0, bezierPoints, 1, bezierPoints.Length - 1);
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bezierPoints[0] = figure.StartPoint;
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BezierPoints = new PointCollection(bezierPoints.ScreenToData(transform));
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}
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}
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geometry.Figures.Add(figure);
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geometry.FillRule = this.FillRule;
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}
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updating = false;
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}
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}
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}
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