CircularPanel.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.Controls;
using System.Windows.Media;

namespace WpfWorld
{
    public enum Orientation
    {
        Default,
        In,
        Out
    }

    public class CircularPanel:Panel
    {
        double angleEach;       // 角度
        Size sizeLargest;       // 最大孩子的尺寸  
        double radius;
        double maxnum;
        double minnum;

        // 圆的半径
        double outerEdgeFromCenter;
        double innerEdgeFromCenter;

        public double Padding
        {
            get { return (double)GetValue(PaddingProperty); }
            set { SetValue(PaddingProperty, value); }
        }

        /// <summary>
        /// DependencyProperty for <see cref="Padding" /> property.
        /// </summary>
        public static readonly DependencyProperty PaddingProperty
            = DependencyProperty.Register("Padding", typeof(double), typeof(CircularPanel),
                new FrameworkPropertyMetadata(0.0d, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender));



        public bool ChildrenHitVisible
        {
            get { return (bool)GetValue(ChildrenHitVisibleProperty); }
            set { SetValue(ChildrenHitVisibleProperty, value); }
        }

        // Using a DependencyProperty as the backing store for ChildrenHitVisible.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty ChildrenHitVisibleProperty =
            DependencyProperty.Register("ChildrenHitVisible", typeof(bool), typeof(CircularPanel), 
                new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender));




        public Orientation Orientation