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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
298
Others/Live-Charts-master/UwpView/Points/PieSlice.cs
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298
Others/Live-Charts-master/UwpView/Points/PieSlice.cs
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using System;
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using Windows.Foundation;
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using Windows.UI.Xaml;
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using Windows.UI.Xaml.Data;
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using Windows.UI.Xaml.Media;
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using Windows.UI.Xaml.Shapes;
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namespace LiveCharts.Uwp.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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//http://domysee.com/blogposts/Blogpost%207%20-%20Creating%20custom%20Shapes%20for%20UWP%20Apps/
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/// <summary>
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///
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/// </summary>
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/// <seealso cref="Windows.UI.Xaml.Shapes.Path" />
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[Bindable]
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public class PieSlice : Path
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="PieSlice"/> class.
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/// </summary>
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public PieSlice()
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{
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RegisterPropertyChangedCallback(WidthProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(RadiusProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(PushOutProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(InnerRadiusProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(WedgeAngleProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(RotationAngleProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(XOffsetProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(YOffsetProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(PieceValueProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(HeightProperty, RenderAffectingPropertyChanged);
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RegisterPropertyChangedCallback(WidthProperty, RenderAffectingPropertyChanged);
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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(nameof(Radius), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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(nameof(PushOut), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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(nameof(InnerRadius), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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(nameof(WedgeAngle), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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(nameof(RotationAngle), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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 x offset property
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/// </summary>
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public static readonly DependencyProperty XOffsetProperty =
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DependencyProperty.Register(nameof(XOffset), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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 XOffset
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{
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get { return (double)GetValue(XOffsetProperty); }
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set { SetValue(XOffsetProperty, value); }
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}
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/// <summary>
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/// The y offset property
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/// </summary>
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public static readonly DependencyProperty YOffsetProperty =
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DependencyProperty.Register(nameof(YOffset), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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 YOffset
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{
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get { return (double)GetValue(YOffsetProperty); }
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set { SetValue(YOffsetProperty, 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(nameof(Percentage), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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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/// <value>
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/// The percentage.
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/// </value>
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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(nameof(PieceValue), typeof(double), typeof(PieSlice),
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new PropertyMetadata(0.0));
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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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private static void RenderAffectingPropertyChanged(DependencyObject obj, DependencyProperty dp)
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{
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(obj as PieSlice)?.SetRenderData();
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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 SetRenderData()
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{
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var innerArcStartPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle, InnerRadius, this);
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innerArcStartPoint.X += XOffset;
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innerArcStartPoint.Y += YOffset;
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var innerArcEndPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, InnerRadius, this);
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innerArcEndPoint.X += XOffset;
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innerArcEndPoint.Y += YOffset;
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var outerArcStartPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle, Radius, this);
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outerArcStartPoint.X += XOffset;
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outerArcStartPoint.Y += YOffset;
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var outerArcEndPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, Radius, this);
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outerArcEndPoint.X += XOffset;
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outerArcEndPoint.Y += YOffset;
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var innerArcMidPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle * .5, InnerRadius, this);
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innerArcMidPoint.X += XOffset;
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innerArcMidPoint.Y += YOffset;
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var outerArcMidPoint = PieUtils.ComputeCartesianCoordinate(RotationAngle + WedgeAngle * .5, Radius, this);
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outerArcMidPoint.X += XOffset;
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outerArcMidPoint.Y += YOffset;
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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, this);
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offset.X -= Width*.5;
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offset.Y -= Height*.5;
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innerArcStartPoint.X += offset.X;
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innerArcStartPoint.Y += offset.Y;
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innerArcEndPoint.X += offset.X;
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innerArcEndPoint.Y += offset.Y;
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outerArcStartPoint.X += offset.X;
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outerArcStartPoint.Y += offset.Y;
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outerArcEndPoint.X += offset.X;
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outerArcEndPoint.Y += 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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var pathFigure = new PathFigure { IsClosed = true, IsFilled = true, StartPoint = innerArcStartPoint };
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if (requiresMidPoint)
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{
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pathFigure.Segments.Add(new LineSegment { Point = outerArcStartPoint });
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pathFigure.Segments.Add(new ArcSegment { Point = outerArcMidPoint, Size = outerArcSize, RotationAngle = 0, IsLargeArc = false, SweepDirection = SweepDirection.Clockwise });
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pathFigure.Segments.Add(new ArcSegment { Point = outerArcEndPoint, Size = outerArcSize, RotationAngle = 0, IsLargeArc = false, SweepDirection = SweepDirection.Clockwise });
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pathFigure.Segments.Add(new LineSegment { Point = innerArcEndPoint });
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pathFigure.Segments.Add(new ArcSegment { Point = innerArcMidPoint, Size = innerArcSize, RotationAngle = 0, IsLargeArc = false, SweepDirection = SweepDirection.Counterclockwise });
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pathFigure.Segments.Add(new ArcSegment { Point = innerArcStartPoint, Size = innerArcSize, RotationAngle = 0, IsLargeArc = false, SweepDirection = SweepDirection.Counterclockwise });
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}
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else
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{
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pathFigure.Segments.Add(new LineSegment { Point = outerArcStartPoint });
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pathFigure.Segments.Add(new ArcSegment { Point = outerArcEndPoint, Size = outerArcSize, RotationAngle = 0, IsLargeArc = largeArc, SweepDirection = SweepDirection.Clockwise });
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pathFigure.Segments.Add(new LineSegment { Point = innerArcEndPoint });
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pathFigure.Segments.Add(new ArcSegment { Point = innerArcStartPoint, Size = innerArcSize, RotationAngle = 0, IsLargeArc = largeArc, SweepDirection = SweepDirection.Counterclockwise });
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}
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Data = new PathGeometry { Figures = new PathFigureCollection() { pathFigure }, FillRule = FillRule.EvenOdd };
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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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/// <param name="container"></param>
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/// <returns></returns>
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public static Point ComputeCartesianCoordinate(double angle, double radius, Path container)
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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 + container.Width*.5, y + container.Height*.5);
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}
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}
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}
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