72 lines
2.3 KiB
C#
72 lines
2.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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namespace MonitoringTechnology.Controls
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{
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/// <summary>
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/// CircularProgressBar.xaml 的交互逻辑
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/// </summary>
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public partial class CircularProgressBar : UserControl
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{
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public double Value
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{
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get { return (double)GetValue(ValueProperty); }
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set { SetValue(ValueProperty, value); }
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}
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public static readonly DependencyProperty ValueProperty =
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DependencyProperty.Register("Value", typeof(double), typeof(CircularProgressBar), new PropertyMetadata(0.0, new PropertyChangedCallback(OnPropertyChanged)));
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private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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(d as CircularProgressBar).Refresh();
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}
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public CircularProgressBar()
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{
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InitializeComponent();
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this.SizeChanged += CircularProgressBar_SizeChanged;
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}
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private void CircularProgressBar_SizeChanged(object sender, SizeChangedEventArgs e)
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{
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this.Refresh();
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}
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private void Refresh()
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{
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this.LayoutRoot.Width = Math.Min(this.RenderSize.Width, this.RenderSize.Height);
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double radius = this.LayoutRoot.Width / 2;
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if (radius <= 0) return;
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double newX = 0.0, newY = 0.0;
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newX = radius + (radius - 3) * Math.Cos((this.Value % 100 * 3.6 - 90) * Math.PI / 180);
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newY = radius + (radius - 3) * Math.Sin((this.Value % 100 * 3.6 - 90) * Math.PI / 180);
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string pathDataStr = "M{0} 3A{3} {3} 0 {4} 1 {1} {2}";
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pathDataStr = string.Format(pathDataStr,
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radius + 0.01,
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newX,
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newY,
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radius - 3,
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this.Value < 50 ? 0 : 1
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);
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var converter = TypeDescriptor.GetConverter(typeof(Geometry));
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this.path.Data = (Geometry)converter.ConvertFrom(pathDataStr);
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}
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}
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}
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