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