WPF将Point数组转换为PathGeometry

Posted 2021-06-26 棉晗榜

xaml页面代码，用的画布，用鼠标画线，然后记录画的Point点

<Canvas x:Name="can01"   Background="LightGreen"  MouseMove="Canvas_MouseMove"  ></Canvas>

      /// <summary>
        /// 鼠标画线轨迹
        /// </summary>
      static  List<Point> points = new List<Point>();


private void Canvas_MouseMove(object sender, MouseEventArgs e)
{
	if (isMouseDown)
	{
		Line line = new Line();
		line.Name = "guiji02";
		line.X1 = startPoint.X;
		line.Y1 = startPoint.Y;

		line.X2 = e.GetPosition(this.can01).X;
		line.Y2 = e.GetPosition(this.can01).Y;

		line.Stroke = Brushes.Black;
		lineList.Add(line);
		this.can01.Children.Add(line);
		startPoint = e.GetPosition(this.can01);

		记录路径点
		points.Add(startPoint);
	}
}

//将Point点集合转换为PathGeometry
if (points.Count == 0)
{
	return;
}

//鼠标绘制的路径     
List<LineSegment> segments = new List<LineSegment>();
foreach (var item in points)
{
	segments.Add(new LineSegment(item, true));
}
PathFigure figure = new PathFigure(points.First(), segments, false);
PathGeometry myPathGeometry = new PathGeometry();
myPathGeometry.Figures.Add(figure);	  
//这个myPathGeometry可用于动画移动路径