BPASmartClient/BPASmartClient.MilkWithTea/Control/CircularProgressBar.xaml.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace BPASmartClient.MilkWithTea.Control
{
    /// <summary>
    /// CircularProgressBar.xaml 的交互逻辑
    /// </summary>
    public partial class CircularProgressBar : UserControl
    {
        public CircularProgressBar()
        {
            InitializeComponent();
            UpdateValue(Percent * 3.6);
        }
        public double Percent
        {
            get { return (double)GetValue(PercentProperty); }
            set
            {
                SetValue(PercentProperty, value);
                UpdateValue(Percent * 3.6);
            }

        }

        //public static DependencyProperty PercentProperty => percentProperty;

        // Using a DependencyProperty as the backing store for Percent.  This enables animation, styling, binding, etc...
        private static readonly DependencyProperty PercentProperty =
            DependencyProperty.Register("Percent", typeof(double), typeof(CircularProgressBar), new PropertyMetadata(default(double), new PropertyChangedCallback(OnPropertyChanged)));


        private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            CircularProgressBar _cycleProgess = d as CircularProgressBar;
            _cycleProgess.UpdateValue(_cycleProgess.Percent * 3.6);
        }
        private void UpdateValue(double angle)
        {

            if (angle > 360) return;
            if (angle < 0) return;

            int offset = 5;
            if (angle > 359) angle = 359.8;
            double radius = this.Width / 2 - offset;
            if (radius < 0) return;
            double b = radius * Math.Sin(angle * Math.PI / 180);
            double x = radius + b;
            double y = radius - radius * Math.Cos(angle * Math.PI / 180);
            double startPositionX = radius + offset;
            double startPositionY = offset;

            Storyboard sb = new Storyboard();
            DoubleAnimation yd1 = new DoubleAnimation();//实例化浮点动画
            cyclePath.RenderTransform = new RotateTransform();//设置为旋转动画
            cyclePath.RenderTransformOrigin = new Point(0.5, 0.5);//设置旋转的中心
            yd1.From = 0;//动画的起始值
            yd1.To = 360;//动画的结束值
            yd1.Duration = TimeSpan.FromSeconds(3);//动画的播放时间
            yd1.RepeatBehavior = RepeatBehavior.Forever;//设置动画循环播放
            Storyboard.SetTarget(yd1, cyclePath);//给故事板绑定动画
            Storyboard.SetTargetProperty(yd1, new PropertyPath("RenderTransform.Angle"));//动画的依赖属性
            sb.Children.Add(yd1);//故事板添加动画

            if (angle  == 0)
            {
                string Data = string.Format("M {0} {1} A {2} {2}  0 1 1 {3} {4}", startPositionX, startPositionY, radius, Math.Round(x, 2) + offset, Math.Round(y, 2) + offset);
                this.cyclePath.Data = Geometry.Parse(Data);
                
                sb.Begin();//播放动画
            }

            else if (angle > 180)
            {

                //string Data = string.Format("M {0} 0 A {0} {0}  0 1 1 {1} {2}", radius, Math.Round(x, 2), Math.Round(y, 2));
                string Data = string.Format("M {0} {1} A {2} {2}  0 1 1 {3} {4}", startPositionX, startPositionY, radius, Math.Round(x, 2) + offset, Math.Round(y, 2) + offset);
                this.cyclePath.Data = Geometry.Parse(Data);
                sb.Stop();
            }
            else
            {

                //string Data = string.Format("M {0} 0 A {0} {0}  0 0 1 {1} {2}", radius, Math.Round(x,2), Math.Round(y, 2));

                string Data = string.Format("M {0} {1} A {2} {2}  0 0 1 {3} {4}", startPositionX, startPositionY, radius, Math.Round(x, 2) + offset, Math.Round(y, 2) + offset);

                this.cyclePath.Data = Geometry.Parse(Data);
                sb.Stop();
            }
            

        }

    }
}