C#开发PACS医学影像处理系统(十二)：绘图处理之图形标记

时间 2021-01-11

标签 html 算法 canvas 微信架构并发机器学习 ide 函数高并发栏目 C# 繁體版

原文原文链接

在医生实际使用过程当中，对于有病灶的影像须要一些2D绘图操做，例如对于病灶的标记和测量，html

这就牵涉到在WPF中的2D绘图操做技术，通常的思路是监听鼠标的按下和抬起以及运动轨迹，目前整理出的经常使用绘图和测量功能以下：算法

图形标记类：（测量类请参考本系列文章：绘图处理之测量工具）canvas

功能	说明
选区	蚂蚁线选择框
线段	线段标记
折线	折线标记
圆形	空心圆形
矩形	空心矩形
多边形	空心多边形
箭头	指向做用
文本	文本标记
清除全部标记	清空单元格绘图对象
撤销上个标记	删除上一个绘图对象

在WPF中，推荐使用InkCanvas控件。微信

最终效果：架构

1.在你的C#工程中添加一个图形类做为操做基类：并发

 　　/// <summary>
    /// 图形信息
    /// </summary>
    public class ShapeInfo
    {
        #region -----声明变量-----

        /// <summary>
        /// 图形操做类型
        /// </summary>
        public DrawAction shapeType = DrawAction.None;

        /// <summary>
        /// 控件画布对象
        /// </summary>
        public InkCanvas inkCanvas;

        /// <summary>
        /// 单位图形画布对象
        /// </summary>
        public Canvas canvas;

        /// <summary>
        /// 图形
        /// </summary>
        public Shape shape;

        /// <summary>
        /// 控制点矩形对象集合
        /// </summary>
        public Dictionary<string, Ellipse> CtrlPoints;

        /// <summary>
        /// 范围选区矩形对象
        /// </summary>
        public Polygon regionRect;

        /// <summary>
        /// 当前形状的几何体
        /// </summary>
        public Geometry geometry;

        /// <summary>
        /// 是否为测量行为
        /// </summary>
        public bool isMeasure = false;

        /// <summary>
        /// 测量对象集合
        /// </summary>
        public List<TextBlock> measureList = new List<TextBlock>();

        #endregion


        #region -----基类虚方法-----

        /// <summary>
        /// 绘制图形
        /// </summary>
        /// <param name="point">鼠标坐标</param>
        public virtual void DrawShape(Point point) { }


        /// <summary>
        /// 图形绘制完成
        /// </summary>
        /// <param name="point">鼠标坐标</param>
        /// <param name="isCallBack">是否回调</param>
        public virtual bool DrawDone(Point point, bool isCallBack) { return true; }


        /// <summary>
        /// 绘制完成回调函数
        /// </summary>
        /// <param name="point">鼠标坐标</param>
        /// <param name="isCallBack">是否回调</param>
        public delegate bool DrawDoneCallBack(Point point, bool isCallBack);

        /// <summary>
        /// 绘制完成回调函数对象
        /// </summary>
        public DrawDoneCallBack drawDoneCallBack;


        /// <summary>
        /// 选区移动回调函数
        /// </summary>
        /// <param name="curPoint">当前鼠标坐标</param>
        /// <param name="downPoint">按下鼠标坐标</param>
        public delegate void RegionRectMoveCallBack(Point curPoint, Point downPoint);

        /// <summary>
        /// 选区移动回调函数对象
        /// </summary>
        public RegionRectMoveCallBack regionRectMoveCallBack;

        #endregion
　　}

2.建立图形标记的子类来继承基类，例如绘制一个线段：机器学习

/// <summary>
/// 线段图形信息
/// </summary>
public class LineInfo : ShapeInfo

在此类中建立绘制方法ide

　　　　 /// <summary>
        /// 建立线段
        /// </summary>
        /// <param name="point">起点坐标</param>
        public void CreateLine(Point point)
        {
            Line line = new Line
            {
                //线段颜色
                Stroke = ShapeManager.shapeColor,
                //线段粗细
                StrokeThickness = ShapeManager.shapeThickness,
                //圆角顶点
                StrokeLineJoin = PenLineJoin.Round,
                StrokeEndLineCap = PenLineCap.Round,
                StrokeStartLineCap = PenLineCap.Round,
                //起点的X、Y坐标
                X1 = point.X,
                Y1 = point.Y,
                //终点的X、Y坐标
                X2 = point.X,
                Y2 = point.Y,
            };

  　　　　　　Canvas canvas = new Canvas();
            canvas.Children.Add(line);
            inkCanvas.Children.Add(canvas);
        }

监听鼠标的的运动轨迹并从新绘制：函数

 　　　　/// <summary>
        /// 绘制图形
        /// </summary>
        /// <param name="point">当前坐标</param>
        public override void DrawShape(Point point)
        {
            line.X2 = point.X;
            line.Y2 = point.Y;
        }

绘制控制点：一个白色的圆形内嵌一个黑色的圆形，做为绘图完成以后的控制点高并发

　　　　 /// <summary>
        /// 绘制控制点
        /// </summary>
        /// <param name="point">鼠标坐标</param>
        /// <param name="tag">控制点标志</param>
        /// <returns></returns>
        public Ellipse DrawCtrlPoint(Point point, string tag)
        {
            Ellipse ctrlPoint = new Ellipse
            {
                StrokeThickness = ShapeManager.ctrlPointThickness,
                Stroke = ShapeManager.ctrlPointColor,
                Fill = ShapeManager.ctrlPointFill,
                Width = ShapeManager.ctrlPointWidth,
                Height = ShapeManager.ctrlPointHeight,
                Margin = new Thickness(point.X - 5, point.Y - 5, point.X - 5, point.Y - 5),
                Visibility = Visibility.Hidden,
            };
            if (!CtrlPoints.Keys.Contains(tag))
            {
                CtrlPoints.Add(tag, ctrlPoint);
                canvas.Children.Add(ctrlPoint);
                ctrlPoint.Tag = tag;
            }
            return ctrlPoint;
        }

看效果：

蚂蚁线选区：

　　　　 /// <summary>
        /// 建立选择框
        /// </summary>
        /// <param name="point">起点坐标</param>
        public void CreateSelected(Point point)
        {

            Polygon selectedPoly = new Polygon
            {
                Stroke = ShapeManager.selectRegColor,
                StrokeThickness = ShapeManager.selectRegThickness,
                StrokeDashArray = ShapeManager.selectRegDashArray,
                Points = { point, point, point, point },
            };
            canvas.Children.Add(selectedPoly);
            inkCanvas.Children.Add(canvas);
        }