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https://gitee.com/akwkevin/aistudio.-wpf.-diagram
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项目结构调整
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艾竹
266
Others/Live-Charts-master/WpfView/Points/PieSlice.cs
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266
Others/Live-Charts-master/WpfView/Points/PieSlice.cs
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using System;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Shapes;
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namespace LiveCharts.Wpf.Points
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{
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//special thanks to Colin Eberhardt for the article.
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//http://www.codeproject.com/Articles/28098/A-WPF-Pie-Chart-with-Data-Binding-Support
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/// <summary>
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///
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/// </summary>
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/// <seealso cref="System.Windows.Shapes.Shape" />
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public class PieSlice : Shape
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{
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#region dependency properties
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/// <summary>
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/// The radius property
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/// </summary>
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public static readonly DependencyProperty RadiusProperty =
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DependencyProperty.Register("RadiusProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The radius of this pie piece
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/// </summary>
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public double Radius
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{
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get { return (double)GetValue(RadiusProperty); }
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set { SetValue(RadiusProperty, value); }
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}
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/// <summary>
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/// The push out property
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/// </summary>
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public static readonly DependencyProperty PushOutProperty =
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DependencyProperty.Register("PushOutProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The distance to 'push' this pie piece out from the centre.
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/// </summary>
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public double PushOut
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{
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get { return (double)GetValue(PushOutProperty); }
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set { SetValue(PushOutProperty, value); }
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}
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/// <summary>
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/// The inner radius property
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/// </summary>
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public static readonly DependencyProperty InnerRadiusProperty =
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DependencyProperty.Register("InnerRadiusProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The inner radius of this pie piece
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/// </summary>
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public double InnerRadius
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{
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get { return (double)GetValue(InnerRadiusProperty); }
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set { SetValue(InnerRadiusProperty, value); }
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}
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/// <summary>
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/// The wedge angle property
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/// </summary>
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public static readonly DependencyProperty WedgeAngleProperty =
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DependencyProperty.Register("WedgeAngleProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The wedge angle of this pie piece in degrees
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/// </summary>
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public double WedgeAngle
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{
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get { return (double)GetValue(WedgeAngleProperty); }
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set
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{
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SetValue(WedgeAngleProperty, value);
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Percentage = (value / 360.0);
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}
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}
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/// <summary>
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/// The rotation angle property
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/// </summary>
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public static readonly DependencyProperty RotationAngleProperty =
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DependencyProperty.Register("RotationAngleProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The rotation, in degrees, from the Y axis vector of this pie piece.
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/// </summary>
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public double RotationAngle
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{
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get { return (double)GetValue(RotationAngleProperty); }
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set { SetValue(RotationAngleProperty, value); }
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}
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/// <summary>
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/// The centre x property
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/// </summary>
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public static readonly DependencyProperty CentreXProperty =
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DependencyProperty.Register("CentreXProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The X coordinate of centre of the circle from which this pie piece is cut.
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/// </summary>
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public double CentreX
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{
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get { return (double)GetValue(CentreXProperty); }
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set { SetValue(CentreXProperty, value); }
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}
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/// <summary>
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/// The centre y property
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/// </summary>
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public static readonly DependencyProperty CentreYProperty =
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DependencyProperty.Register("CentreYProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
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/// <summary>
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/// The Y coordinate of centre of the circle from which this pie piece is cut.
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/// </summary>
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public double CentreY
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{
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get { return (double)GetValue(CentreYProperty); }
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set { SetValue(CentreYProperty, value); }
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}
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/// <summary>
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/// The percentage property
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/// </summary>
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public static readonly DependencyProperty PercentageProperty =
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DependencyProperty.Register("PercentageProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0));
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/// <summary>
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/// The percentage of a full pie that this piece occupies.
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/// </summary>
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public double Percentage
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{
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get { return (double)GetValue(PercentageProperty); }
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private set { SetValue(PercentageProperty, value); }
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}
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/// <summary>
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/// The piece value property
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/// </summary>
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public static readonly DependencyProperty PieceValueProperty =
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DependencyProperty.Register("PieceValueProperty", typeof(double), typeof(PieSlice),
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new FrameworkPropertyMetadata(0.0));
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/// <summary>
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/// The value that this pie piece represents.
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/// </summary>
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public double PieceValue
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{
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get { return (double)GetValue(PieceValueProperty); }
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set { SetValue(PieceValueProperty, value); }
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}
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#endregion
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/// <summary>
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/// Gets a value that represents the <see cref="T:System.Windows.Media.Geometry" /> of the <see cref="T:System.Windows.Shapes.Shape" />.
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/// </summary>
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protected override Geometry DefiningGeometry
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{
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get
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{
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// Create a StreamGeometry for describing the shape
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var geometry = new StreamGeometry { FillRule = FillRule.EvenOdd };
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using (var context = geometry.Open())
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{
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DrawGeometry(context);
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}
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// Freeze the geometry for performance benefits
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geometry.Freeze();
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return geometry;
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}
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}
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/// <summary>
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/// Draws the pie piece
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/// </summary>
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private void DrawGeometry(StreamGeometryContext context)
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{
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var innerArcStartPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle, InnerRadius);
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innerArcStartPoint.Offset(CentreX, CentreY);
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var innerArcEndPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, InnerRadius);
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innerArcEndPoint.Offset(CentreX, CentreY);
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var outerArcStartPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle, Radius);
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outerArcStartPoint.Offset(CentreX, CentreY);
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var outerArcEndPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, Radius);
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outerArcEndPoint.Offset(CentreX, CentreY);
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var innerArcMidPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle * .5, InnerRadius);
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innerArcMidPoint.Offset(CentreX, CentreY);
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var outerArcMidPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle * .5, Radius);
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outerArcMidPoint.Offset(CentreX, CentreY);
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var largeArc = WedgeAngle > 180.0d;
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var requiresMidPoint = Math.Abs(WedgeAngle - 360) < .01;
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if (PushOut > 0 && !requiresMidPoint)
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{
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var offset = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle / 2, PushOut);
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innerArcStartPoint.Offset(offset.X, offset.Y);
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innerArcEndPoint.Offset(offset.X, offset.Y);
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outerArcStartPoint.Offset(offset.X, offset.Y);
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outerArcEndPoint.Offset(offset.X, offset.Y);
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}
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var outerArcSize = new Size(Radius, Radius);
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var innerArcSize = new Size(InnerRadius, InnerRadius);
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if (requiresMidPoint)
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{
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context.BeginFigure(innerArcStartPoint, true, true);
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context.LineTo(outerArcStartPoint, true, true);
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context.ArcTo(outerArcMidPoint, outerArcSize, 0, false, SweepDirection.Clockwise, true, true);
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context.ArcTo(outerArcEndPoint, outerArcSize, 0, false, SweepDirection.Clockwise, true, true);
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context.LineTo(innerArcEndPoint, true, true);
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context.ArcTo(innerArcMidPoint, innerArcSize, 0, false, SweepDirection.Counterclockwise, true, true);
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context.ArcTo(innerArcStartPoint, innerArcSize, 0, false, SweepDirection.Counterclockwise, true, true);
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return;
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}
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context.BeginFigure(innerArcStartPoint, true, true);
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context.LineTo(outerArcStartPoint, true, true);
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context.ArcTo(outerArcEndPoint, outerArcSize, 0, largeArc, SweepDirection.Clockwise, true, true);
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context.LineTo(innerArcEndPoint, true, true);
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context.ArcTo(innerArcStartPoint, innerArcSize, 0, largeArc, SweepDirection.Counterclockwise, true, true);
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}
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}
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/// <summary>
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///
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/// </summary>
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public static class PieUtils
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{
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/// <summary>
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/// Converts a coordinate from the polar coordinate system to the cartesian coordinate system.
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/// </summary>
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/// <param name="angle"></param>
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/// <param name="radius"></param>
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/// <returns></returns>
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public static Point ComputeCartesianCoordinate(double angle, double radius)
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{
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// convert to radians
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var angleRad = (Math.PI / 180.0) * (angle - 90);
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var x = radius * Math.Cos(angleRad);
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var y = radius * Math.Sin(angleRad);
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return new Point(x, y);
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}
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}
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}
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