98 lines
2.3 KiB
C#
98 lines
2.3 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.Ink;
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using System.Windows.Input;
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using System.Windows.Media;
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namespace Ink_Canvas.Helpers
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{
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public class VisualCanvas : FrameworkElement
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{
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protected override Visual GetVisualChild(int index)
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{
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return Visual;
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}
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protected override int VisualChildrenCount => 1;
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public VisualCanvas(DrawingVisual visual)
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{
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Visual = visual;
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AddVisualChild(visual);
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}
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public DrawingVisual Visual { get; }
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}
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/// <summary>
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/// 用于显示笔迹的类
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/// </summary>
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public class StrokeVisual : DrawingVisual
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{
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/// <summary>
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/// 创建显示笔迹的类
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/// </summary>
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public StrokeVisual() : this(new DrawingAttributes()
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{
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Color = Colors.Red,
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//FitToCurve = true,
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Width = 3,
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Height = 3
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})
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{
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}
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/// <summary>
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/// 创建显示笔迹的类
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/// </summary>
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/// <param name="drawingAttributes"></param>
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public StrokeVisual(DrawingAttributes drawingAttributes)
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{
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_drawingAttributes = drawingAttributes;
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}
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/// <summary>
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/// 设置或获取显示的笔迹
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/// </summary>
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public Stroke Stroke { set; get; }
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/// <summary>
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/// 在笔迹中添加点
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/// </summary>
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/// <param name="point"></param>
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public void Add(StylusPoint point)
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{
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if (Stroke == null)
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{
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var collection = new StylusPointCollection { point };
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Stroke = new Stroke(collection) { DrawingAttributes = _drawingAttributes };
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}
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else
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{
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Stroke.StylusPoints.Add(point);
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}
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}
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/// <summary>
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/// 重新画出笔迹
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/// </summary>
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public void Redraw()
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{
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try
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{
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using (var dc = RenderOpen())
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{
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Stroke.Draw(dc);
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}
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}
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catch { }
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}
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private readonly DrawingAttributes _drawingAttributes;
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}
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}
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