将以往的代码复制到代码库
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215
Future.Contract/Adorners/LoadingAdorner.cs
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215
Future.Contract/Adorners/LoadingAdorner.cs
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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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.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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namespace Future.Contract
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{
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/// <summary>
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/// 加载遮罩：用于后台执行耗时加载任务时提供操作遮罩
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/// </summary>
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public class LoadingAdorner : Adorner
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{
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[AllowNull]
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private Grid _Layout;
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[AllowNull]
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private TextBlock _Feedback;
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[AllowNull]
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private AdornerLayer _AdornerLayer;
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[AllowNull]
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private VisualCollection _Visuals;
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private Cursor _Cursor;
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private System.Windows.Threading.DispatcherTimer _UiTimer = new System.Windows.Threading.DispatcherTimer();
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/// <summary>
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/// 对目标元素提供加载遮罩
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/// </summary>
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/// <param name="adornedElement">要进行遮盖的视觉元素</param>
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private LoadingAdorner(UIElement adornedElement) : base(adornedElement)
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{
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PrepareLoading();
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}
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private LoadingAdorner(UIElement adornedElement, string feedback, double progress = -1.1) : base(adornedElement)
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{
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PrepareLoading(feedback, progress);
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}
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/// <summary>
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/// 反馈信息
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/// </summary>
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public string Feedback
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{
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get { return (string)GetValue(FeedbackProperty); }
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set { SetValue(FeedbackProperty, value); Refresh(); }
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}
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// Using a DependencyProperty as the backing store for Feedback. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty FeedbackProperty =
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DependencyProperty.Register("Feedback", typeof(string), typeof(LoadingAdorner), new PropertyMetadata("请稍等..."));
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/// <summary>
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/// 进度信息
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/// </summary>
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public double Progress
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{
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get { return (double)GetValue(ProgressProperty); }
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set { SetValue(ProgressProperty, value); Refresh(); }
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}
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// Using a DependencyProperty as the backing store for Progress. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty ProgressProperty =
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DependencyProperty.Register("Progress", typeof(double), typeof(LoadingAdorner), new PropertyMetadata(-1.1));
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/// <summary>
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/// 准备启动：生成装饰器需要的内容
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/// </summary>
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/// <param name="feedback"></param>
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private void PrepareLoading(string feedback = "", double progress = -1.1)
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{
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_Visuals = new VisualCollection(this);
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_Layout = new Grid
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{
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Cursor = Cursors.Wait,
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ForceCursor = true
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};
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_Layout.Children.Add(new Border()
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{
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Background = Brushes.Gray,
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Opacity = 0.85,
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});
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_Feedback = new TextBlock()
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{
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Text = feedback,
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//FontSize=14,
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Foreground = Brushes.White,
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HorizontalAlignment = HorizontalAlignment.Center,
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VerticalAlignment = VerticalAlignment.Center,
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Margin = new Thickness(10)
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};
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_Layout.Children.Add(_Feedback);
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_Visuals.Add(_Layout);
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FeedbackProgress(feedback, progress);
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_UiTimer.Interval = TimeSpan.FromMilliseconds(200);
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_UiTimer.Tick += (s, e) => Animate();
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_UiTimer.Start();
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_AdornerLayer = AdornerLayer.GetAdornerLayer(AdornedElement);
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_AdornerLayer?.Add(this);
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if (AdornedElement is FrameworkElement)
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{
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FrameworkElement target = (FrameworkElement)AdornedElement;
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_Cursor = target.Cursor;
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target.Cursor = Cursors.Wait;
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}
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}
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/// <summary>
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/// 开始装载：可以保证每个控件上方只会出现一个加载遮罩层
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/// </summary>
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/// <param name="adornedElement">加载目标</param>
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/// <param name="feedback">反馈信息</param>
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/// <param name="progress">进度信息</param>
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/// <returns>加载遮罩装饰器</returns>
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public static LoadingAdorner BeginLoading(UIElement adornedElement, string feedback = "", double progress = -1)
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{
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var adorners = AdornerLayer.GetAdornerLayer(adornedElement)?.GetAdorners(adornedElement)?.OfType<LoadingAdorner>();
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if (adorners != null && adorners.Count() == 1) return adorners.ToArray()[0];
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return new LoadingAdorner(adornedElement, feedback, progress);
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}
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/// <summary>
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/// 结束加载：清除一个控件上方所有的加载遮罩层
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/// </summary>
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/// <param name="adornedElement">用标元素</param>
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public static void FinishLoading(UIElement adornedElement)
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{
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var adornerLayer = AdornerLayer.GetAdornerLayer(adornedElement);
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var adorners = adornerLayer?.GetAdorners(adornedElement);
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if (adorners == null) return;
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for (int i = adorners.Length - 1; i >= 0; i--)
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if (adorners[i] is LoadingAdorner)
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((LoadingAdorner)adorners[i]).Finish();
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}
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/// <summary>
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/// 进度反馈：用于向装饰器反馈当前进度
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/// </summary>
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/// <param name="feedback">信息：进度遮罩上显示的信息</param>
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/// <param name="progress">进度：0~1的小数，代表?%,其他数值无效</param>
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public void FeedbackProgress(string feedback = "", double progress = -1)
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{
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if (!string.IsNullOrEmpty(feedback)) Feedback = feedback;
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if (progress >= 0 && progress <= 1) Progress = progress;
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}
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private string _ProgressInfo = "请稍等...";
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/// <summary>
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/// 用于更新“进度信息”
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/// </summary>
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private void Refresh()
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{
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string prog = "-*-";
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if (0 <= Progress && Progress <= 1)
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prog = string.Format("{0:0%}", Progress).PadLeft(3);
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_ProgressInfo = $"[{prog}] : {Feedback.TrimEnd('.')} ... ";
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}
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/// <summary>
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/// 循环动画
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/// </summary>
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private void Animate()
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{
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string info = _Feedback.Text;
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if (!string.IsNullOrEmpty(info) && info.Length > 0)
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{
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char end = info[info.Length - 1];
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info = _ProgressInfo;
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switch (end)
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{
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case '|': { info = info + '/'; } break;
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case '/': { info = info + '-'; } break;
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case '-': { info = info + '\\'; } break;
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case '\\': { info = info + '|'; } break;
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default: { info = info + '|'; } break;
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}
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_Feedback.Text = info;
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}
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else _Feedback.Text = _ProgressInfo + "|";
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}
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/// <summary>
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/// 结束装载
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/// </summary>
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public void Finish()
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{
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_UiTimer.Stop();
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if (AdornedElement is FrameworkElement)
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{
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((FrameworkElement)AdornedElement).Cursor = _Cursor;
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}
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_AdornerLayer?.Remove(this);
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}
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protected override int VisualChildrenCount => _Visuals.Count;
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protected override Visual GetVisualChild(int index) => _Visuals[index];
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protected override Size ArrangeOverride(Size finalSize)
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{
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_Layout.Arrange(new Rect(new Point(0, 0), finalSize));
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return finalSize;
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}
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}
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}
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