using System.Collections.Generic;
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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.Media;
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namespace PdmSwPlugin.Commmon.Util.UI
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{
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public class MaskAdorner : Adorner
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{
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private UIElement child;
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private TextBox textBox;
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public static readonly Dictionary<Visual, MaskAdorner> cache = new Dictionary<Visual, MaskAdorner>();
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public MaskAdorner(UIElement adornedElement, string message = null) : base(adornedElement)
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{
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textBox = new TextBox
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{
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TextAlignment = TextAlignment.Center,
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Background = new SolidColorBrush(Color.FromArgb(0, 0, 0, 0)),
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Text = message,
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BorderThickness = new Thickness(0)
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};
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StackPanel stackPanel = new StackPanel()
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{
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HorizontalAlignment = HorizontalAlignment.Center,
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VerticalAlignment = VerticalAlignment.Center,
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Background = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255)),
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};
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stackPanel.Children.Add(new ProgressBar
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{
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Width = 100,
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Height = 20,
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IsIndeterminate = true
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});
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stackPanel.Children.Add(textBox);
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Child = new Border
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{
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Background = new SolidColorBrush(Color.FromArgb(100, 0, 0, 0)),
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HorizontalAlignment = HorizontalAlignment.Stretch,
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VerticalAlignment = VerticalAlignment.Stretch,
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Child = stackPanel
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};
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}
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//Adorner 直接继承自 FrameworkElement，
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//没有Content和Child属性，
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//自己添加一个，方便向其中添加我们的控件
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public UIElement Child
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{
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get => child;
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set
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{
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if (value == null)
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{
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RemoveVisualChild(child);
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}
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else
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{
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AddVisualChild(value);
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}
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child = value;
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}
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}
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//重写VisualChildrenCount 表示此控件只有一个子控件
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protected override int VisualChildrenCount => 1;
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//控件计算大小的时候，我们在装饰层上添加的控件也计算一下大小
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protected override Size ArrangeOverride(Size finalSize)
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{
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child?.Arrange(new Rect(finalSize));
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return finalSize;
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}
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//重写GetVisualChild,返回我们添加的控件
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protected override Visual GetVisualChild(int index)
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{
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if (index == 0 && child != null) return child;
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return base.GetVisualChild(index);
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}
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public void ShowMessage(string message)
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{
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this.textBox.Text = message;
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}
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public static void ShowMask(Visual visual, string message = null)
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{
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var sb = cache;
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if (cache.ContainsKey(visual))
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{
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return;
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}
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visual.Dispatcher.Invoke(() =>
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{
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AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(visual);
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if (adornerLayer == null) return;
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Adorner[] ads = adornerLayer.GetAdorners(adornerLayer);
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if (ads != null)
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{
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foreach (Adorner ad in ads)
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{
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if (ad is MaskAdorner adorner)
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{
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return;
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}
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}
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}
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//创建我们定义的Adorner
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MaskAdorner _adorner = new MaskAdorner(adornerLayer, message);
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//添加到adornerLayer装饰层上
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adornerLayer.Add(_adorner);
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cache.Add(visual, _adorner);
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});
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}
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public static void ShowMessage(Visual visual, string message)
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{
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if (!cache.ContainsKey(visual))
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{
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return;
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}
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visual.Dispatcher.Invoke(() =>
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{
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AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(visual);
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MaskAdorner mask = cache[visual];
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if (mask == null)
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{
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return;
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}
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mask.ShowMessage(message);
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});
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}
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public static void HideMask(Visual visual)
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{
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if (!cache.ContainsKey(visual))
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{
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return;
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}
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visual.Dispatcher.Invoke(() =>
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{
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if (cache.ContainsKey(visual))
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{
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AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(visual);
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adornerLayer.Remove(cache[visual]);
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cache.Remove(visual);
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}
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//Adorner[] ads = adornerLayer.GetAdorners(adornerLayer);
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//if (ads != null)
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//{
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// foreach (Adorner ad in ads)
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// {
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// if (ad is MaskAdorner)
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// {
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// adornerLayer.Remove(ad);
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// }
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// }
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//}
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});
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}
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}
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}
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