291 lines
12 KiB
C#
291 lines
12 KiB
C#
using System;
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using System.Collections.Generic;
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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.Controls;
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using System.Windows;
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using System.Windows.Documents;
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using System.Windows.Media;
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using System.Windows.Media.Animation;
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namespace Future.Contract
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{
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public sealed class DrawerAdorner : Adorner
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{
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private VisualCollection mVisuals;
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private Border mRoot;
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private AdornerLayer? mLayer;
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private Size mSize;
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private bool mIsShowed = false;
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private bool mIsClosed = false;
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private Func<bool> mApplyCloseCallback;
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public DrawerAdorner(UIElement adornedElement) : base(adornedElement)
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{
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mVisuals = new VisualCollection(this);
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mRoot = new Border();
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mVisuals.Add(mRoot);
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this.mLayer = AdornerLayer.GetAdornerLayer(adornedElement);
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//注意：开场动画必须在此处执行
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this.Loaded += (ss, ee) => this.StartAnimationIn();
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//this.Unloaded += (ss, ee) => this.StartAnimationOut();
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}
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protected override int VisualChildrenCount => mVisuals.Count;
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protected override Visual GetVisualChild(int index) => mVisuals[index];
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protected override Size ArrangeOverride(Size finalSize)
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{
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mSize = finalSize;
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mRoot.Arrange(new Rect(new Point(), finalSize));
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return finalSize;
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}
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#pragma warning disable CS0628 // 在密封类型中声明了新的保护成员
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protected void SetHandleVisibility(Visibility visibility)
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#pragma warning restore CS0628 // 在密封类型中声明了新的保护成员
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{
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if (this.mRoot.Child != null && this.mRoot.Child is DrawerTemplate)
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{
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DrawerTemplate template = this.mRoot.Child as DrawerTemplate;
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template.HandleVisibility = visibility;
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}
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}
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public void ShowWithTemplate(DrawerTemplate? template, FrameworkElement view, string title, Func<bool>? applyCloseCallback = null)
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{
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if (template == null && view == null) return;
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view?.ClearValue(FrameworkElement.WidthProperty);
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view?.ClearValue(FrameworkElement.HeightProperty);
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this.mApplyCloseCallback = applyCloseCallback;
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if (template != null)
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{
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this.mRoot.Child = template;
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template.Title = title;
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template.Content = view;
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template.ApplyCloseDrawer += () => this.Close();
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}
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else this.mRoot.Child = view;
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//隐藏同一个目标上最上层的相同装饰器的半透明区域(注意：需要防止这个逻辑执行2次)
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var adorners = this.mLayer?.GetAdorners(this.AdornedElement);
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if (adorners != null && !this.mIsShowed)//保证即使更换显示内容也不会重复处理关闭按钮的隐藏
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{
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for (int i = adorners.Length - 1; i >= 0; i--)
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if (adorners[i] is DrawerAdorner)
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{
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((DrawerAdorner)adorners[i]).SetHandleVisibility(Visibility.Collapsed);
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break;
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}
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}
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if (!this.mIsShowed) this.mLayer?.Add(this);//完成显示工作
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//注意：入场动画在OnLoad事件的响应时调用
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this.mIsShowed = true;
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this.mIsClosed = false;
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}
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public static DrawerAdorner ShowInVisual(UIElement adornedElement, DrawerTemplate? template, FrameworkElement view, string title, Func<bool>? applyCloseCallback = null)
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{
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DrawerAdorner drawer = new DrawerAdorner(adornedElement);
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drawer.ShowWithTemplate(template?.Clone(), view, title, applyCloseCallback);
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//drawer.ShowWithTemplate(template, view, title, applyCloseCallback);
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return drawer;
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}
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public static DrawerAdorner ShowInTarget(string targetName, DrawerTemplate? template, FrameworkElement view, string title, Func<bool>? applyCloseCallback = null)
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{
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if (LayerOwners.ContainsKey(targetName))
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return ShowInVisual(LayerOwners[targetName], template, view, title, applyCloseCallback);
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else return null;
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}
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public void ShowOnlyView(FrameworkElement view) => this.ShowWithTemplate(null, view, null, null);
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public static DrawerAdorner ShowView(UIElement adornedElement, FrameworkElement view)
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{
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DrawerAdorner drawer = new DrawerAdorner(adornedElement);
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drawer.ShowOnlyView(view);
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return drawer;
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}
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public void CloseDrawer()
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{
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//强制清空请求关闭委托
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this.mApplyCloseCallback = null;
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this.Close();
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}
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private async void Close()
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{
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if (this.mIsClosed) return;//如果已经关闭了就不要重复执行了，会导致层叠问题
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var sign = this.mApplyCloseCallback?.Invoke();
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if (sign == false) return;
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#region 关闭动画；注意：不能单独封装为函数使用，否则会因为“异步”执行造成动画失效；如果单独封装成函数则需要将“装饰器”卸载操作一同封装
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float seconds = 0.3f;
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var sb = new Storyboard();
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//var offset = mRoot?.ActualWidth ?? 0;
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//var animation = new ThicknessAnimation
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//{
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// Duration = new Duration(TimeSpan.FromSeconds(seconds)),
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// From = new Thickness(0),
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// To = new Thickness(-offset, 0, offset, 0),
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//};
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var animation = BuildAnimation(seconds, true);
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Storyboard.SetTargetProperty(animation, new PropertyPath("Margin"));
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sb.Children.Add(animation);
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sb.Begin(mRoot);
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await Task.Delay((int)(seconds * 1000));
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#endregion
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//开始卸载装饰器
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this.SetHandleVisibility(Visibility.Collapsed);
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this.mRoot.Child = null; //清除模板视图的引用
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this.mLayer?.Remove(this); //完成关闭装饰器工作
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//显示同一个目标上最上层的相同装饰器的半透明区域
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var adorners = this.mLayer?.GetAdorners(this.AdornedElement);
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if (adorners != null)
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{
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for (int i = adorners.Length - 1; i >= 0; i--)
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if (adorners[i] is DrawerAdorner)
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{
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((DrawerAdorner)adorners[i]).SetHandleVisibility(Visibility.Visible);
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break;
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}
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}
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this.mIsClosed = true;
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this.mIsShowed = false;
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}
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private ThicknessAnimation BuildAnimation(float seconds = 0.3f, bool inOrOut = false)
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{
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var wOffset = mRoot?.ActualWidth ?? 0;
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var hOffset = mRoot?.ActualHeight ?? 0;
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Thickness from = new Thickness(-wOffset, 0, wOffset, 0);
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Thickness to = new Thickness(0);
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DrawerTemplate template = this.mRoot?.Child as DrawerTemplate;
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if (template != null)
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{
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switch (template.Dock)
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{
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case Dock.Top:
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from = new Thickness(0, -hOffset, 0, hOffset);
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break;
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case Dock.Bottom:
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from = new Thickness(0, hOffset, 0, -hOffset);
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break;
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case Dock.Right:
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from = new Thickness(wOffset, 0, -wOffset, 0);
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break;
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default: break;
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}
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}
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//如果是退出动画则需要对调From与To两个节点
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if (inOrOut)
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{
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Thickness thickness = from;
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from = to;
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to = thickness;
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}
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return new ThicknessAnimation()
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{
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Duration = new Duration(TimeSpan.FromSeconds(seconds)),
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From = from,
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To = to
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};
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}
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private async void StartAnimationIn(float seconds = 0.3f)
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{
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var sb = new Storyboard();
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//var offset = mRoot?.ActualWidth ?? 0;
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//var animation = new ThicknessAnimation
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//{
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// Duration = new Duration(TimeSpan.FromSeconds(seconds)),
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// From = new Thickness(-offset, 0, offset, 0),
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// To = new Thickness(0)
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//};
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var animation = BuildAnimation(seconds);
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Storyboard.SetTargetProperty(animation, new PropertyPath("Margin"));
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sb.Children.Add(animation);
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sb.Begin(mRoot);
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await Task.Delay((int)(seconds * 1000));
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}
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private async void StartAnimationOut(float seconds = 0.3f)
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{
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var sb = new Storyboard();
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var offset = mRoot?.ActualWidth ?? 0;
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var animation = new ThicknessAnimation
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{
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Duration = new Duration(TimeSpan.FromSeconds(seconds)),
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From = new Thickness(0),
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To = new Thickness(-offset, 0, offset, 0),
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};
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Storyboard.SetTargetProperty(animation, new PropertyPath("Margin"));
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sb.Children.Add(animation);
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sb.Begin(mRoot);
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await Task.Delay((int)(seconds * 1000));
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this.mRoot.Child = null;
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this.mLayer?.Remove(this);//完成关闭工作
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//显示同一个目标上最上层的相同装饰器的半透明区域
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var adorners = this.mLayer?.GetAdorners(this.AdornedElement);
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if (adorners != null)
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{
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for (int i = adorners.Length - 1; i >= 0; i--)
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if (adorners[i] is DrawerAdorner)
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{
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((DrawerAdorner)adorners[i]).SetHandleVisibility(Visibility.Visible);
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break;
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}
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}
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}
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#region 依赖属性
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private static Dictionary<string, UIElement> LayerOwners = new Dictionary<string, UIElement>();
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public static string GetLayerName(DependencyObject obj)
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{
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return (string)obj.GetValue(LayerNameProperty);
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}
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public static void SetLayerName(DependencyObject obj, string value)
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{
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obj.SetValue(LayerNameProperty, value);
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}
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// Using a DependencyProperty as the backing store for LayerName. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty LayerNameProperty =
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DependencyProperty.RegisterAttached("LayerName", typeof(string), typeof(DrawerAdorner), new PropertyMetadata(null, (s, e) =>
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{
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//将抽屉拥有者注册到静态区
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var layerOwner = s as UIElement;
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if (s == null) return;
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if (e.OldValue != null && LayerOwners.ContainsKey((string)e.OldValue))
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LayerOwners.Remove((string)e.OldValue);
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if (e.NewValue != null && layerOwner != null)
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{
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if (LayerOwners.ContainsKey((string)e.NewValue))
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LayerOwners.Remove((string)e.NewValue);
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LayerOwners.Add((string)e.NewValue, layerOwner);
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DependencyObject d = s;
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while (d != null)
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{
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if (d is Window) break;
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var f = d as FrameworkElement;
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if (f != null && f is not Window) d = f.Parent;
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}
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if (d is Window)
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{
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Window w = (Window)d;
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w.Unloaded += (ss, ee) =>
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LayerOwners.Remove((string)e.NewValue);
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}
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}
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}));
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#endregion
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}
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}
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