41 lines
1.3 KiB
C#
41 lines
1.3 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;
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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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using Deedy.Activity.Helpers;
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namespace Deedy.Activity
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{
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public class DragPlacementAdorner : Adorner
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{
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private static readonly Pen _Pen;
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private static readonly Brush _Brush;
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public DropPlacement DropPlacement { get; private set; }
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public LayoutDirection? LayoutDirection { get; private set; }
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static DragPlacementAdorner()
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{
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// 定义装饰器的画笔与画刷
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_Pen = new Pen(Brushes.Transparent, 0);
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_Pen.Freeze();
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_Brush = new SolidColorBrush(Colors.Red) { Opacity = 0.5 };
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_Brush.Freeze();
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}
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public DragPlacementAdorner(UIElement adornedElement, DropPlacement dropPlacement, LayoutDirection? parentLayoutDirection) : base(adornedElement)
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{
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this.DropPlacement = dropPlacement;
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this.LayoutDirection = parentLayoutDirection;
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IsHitTestVisible = false;
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}
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protected override void OnRender(DrawingContext drawingContext)
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=> this.Help_DrawDropAdorner(drawingContext, this.DropPlacement, this.LayoutDirection, _Pen, _Brush);
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}
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}
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