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前言

为了更好地去学习WPF+Halcon，我决定去报个班学一下。原因无非是想换个工作。相关的教学视频来源于下方的Up主的提供的教程。这里只做笔记分享，想要源码或者教学视频可以和他联系一下。

相关链接

微软系列技术教程 WPF 年度公益课程

Halcon开发 CSDN博客专栏

个人学习的Gitee 项目地址仓库

项目专栏

WPF+Halcon实战项目

运行环境

• .net core 8.0
• visual studio 2022
• halcon HDevelop 20.11
• windows 11

匹配图片

封装组件

Halcon官方的代码很多都是基于String的类型判断，我们要对Halcon的代码进行一步简单的封装。

新增类库项目

选择依赖顺序并添加Nuget

让我们的WPF主程序依赖于HalconExtension类库

添加Nuget

修改原本矩形方法

原来的方法

             // 显示绘制图案HalconWindow.HalconWindow.AttachDrawingObjectToWindow(rect);// 去除绘制图案//HalconWindow.HalconWindow.DetachDrawingObjectFromWindow(rect);rect.OnDrag(new HDrawingObject.HDrawingObjectCallbackClass((id, window, type) =>{var hv_type = id.GetDrawingObjectParams("type");var row1 = id.GetDrawingObjectParams("row1");var row2 = id.GetDrawingObjectParams("row2");var column1 = id.GetDrawingObjectParams("column1");var column2 = id.GetDrawingObjectParams("column2");//打印坐标NLogHelper.Debug($"拖动事件: {hv_type}:{row1} {column1} {row2} {column2} ");}));

现在的方法：

using HalconDotNet;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace HalconExtension.Models
{/// <summary>/// 矩形封装/// </summary>public class HRectangleObj{public HTuple HType { get; private set; }public HTuple Row1 { get; private set; }public HTuple Row2 { get; private set; }public HTuple Column1 { get; private set; }public HTuple Column2 { get; private set; }public HDrawingObject DrawingObject { get; set; }/// <summary>/// HS组件主题/// </summary>public HSmartWindowControlWPF WindowControlWPF { get; set; }public Action<HRectangleObj> RefleshCallBack { get; set; }/// <summary>/// 初始化构造函数/// </summary>/// <param name="windowControlWPF"></param>/// <param name="row1"></param>/// <param name="column1"></param>/// <param name="row2"></param>/// <param name="column2"></param>public HRectangleObj(HSmartWindowControlWPF windowControlWPF,HTuple row1,HTuple column1,HTuple row2,HTuple column2){WindowControlWPF = windowControlWPF;Row1 = row1;Column1 = column1;Row2 = row2;Column2 = column2;DrawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE1,Row1,Column1,Row2,Column2);}/// <summary>/// 默认构造函数/// </summary>/// <param name="windowControl"></param>public HRectangleObj(HSmartWindowControlWPF windowControl){WindowControlWPF = windowControl;Row1 = 0;Column1 = 0;Row2 = 100;Column2 = 100;DrawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE1, Row1, Column1, Row2, Column2);//添加更新事件DrawingObject.OnDrag(Reflash);DrawingObject.OnResize(Reflash);}/// <summary>/// 显示图像/// </summary>public void Show(){WindowControlWPF.HalconWindow.AttachDrawingObjectToWindow(DrawingObject);}/// <summary>/// 分离图像/// </summary>public void Close(){WindowControlWPF.HalconWindow.DetachDrawingObjectFromWindow(DrawingObject);}/// <summary>/// 序列化输出/// </summary>/// <returns></returns>public override string ToString(){return JsonConvert.SerializeObject(new{type = HType.ToString(),row1 = TwoDecimalPlaces(Row1),column1 = TwoDecimalPlaces(Column1),row2 = TwoDecimalPlaces(Row2),column2 = TwoDecimalPlaces(Column2)});}public void Reflash(HDrawingObject drawid, HWindow window, string type){HType = drawid.GetDrawingObjectParams("type");Row1 = drawid.GetDrawingObjectParams("row1");Row2 = drawid.GetDrawingObjectParams("row2");Column1 = drawid.GetDrawingObjectParams("column1");Column2 = drawid.GetDrawingObjectParams("column2");//将本身回调RefleshCallBack(this);}/// <summary>/// 保留两位小数/// </summary>/// <returns></returns>private string TwoDecimalPlaces(HTuple value){return decimal.Round(decimal.Parse(value.ToString()), 2).ToString();}}
}

运行代码

            InitRectangleBtn = new RelayCommand(() =>{MsgHelper.Info("生成矩形");//rect = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE1, 100, 200, 300, 400); 显示绘制图案//HalconWindow.HalconWindow.AttachDrawingObjectToWindow(rect); 去除绘制图案HalconWindow.HalconWindow.DetachDrawingObjectFromWindow(rect);//rect.OnDrag(new HDrawingObject.HDrawingObjectCallbackClass((id, window, type) =>//{//    var hv_type = id.GetDrawingObjectParams("type");//    var row1 = id.GetDrawingObjectParams("row1");//    var row2 = id.GetDrawingObjectParams("row2");//    var column1 = id.GetDrawingObjectParams("column1");//    var column2 = id.GetDrawingObjectParams("column2");//    //打印坐标//    NLogHelper.Debug($"拖动事件: {hv_type}:{row1} {column1} {row2} {column2} ");//}));//初始化对象RectangleObj = new HRectangleObj(HalconWindow);//刷新回调里面进行打印RectangleObj.RefleshCallBack = (obj) =>{NLogHelper.Debug(obj.ToString());};//显示对象RectangleObj.Show();});

运行结果：

对矩形进行抽象封装

抽象就是abstract，简单来说就是认为所有的基类都有相同的函数，比如ToString,Show,Close等。抽象更利于我们的代码的规划。

其实很多语法是程序自己给自己加限制，就是强迫自己按照某个逻辑进行代码开发。典型的例子就是JS转TS。这里不展开说明

抽象基类

using HalconDotNet;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace HalconExtension.Models
{public abstract class HObjBase{/// <summary>/// HS组件主题/// </summary>public HSmartWindowControlWPF WindowControlWPF { get; set; }public HDrawingObject DrawingObject { get; set; }public HTuple HType { get; private set; }public HObjBase(HSmartWindowControlWPF windowControlWPF){WindowControlWPF = windowControlWPF;}/// <summary>/// 显示图像/// </summary>public void Show(){WindowControlWPF.HalconWindow.AttachDrawingObjectToWindow(DrawingObject);}/// <summary>/// 分离图像/// </summary>public void Close(){WindowControlWPF.HalconWindow.DetachDrawingObjectFromWindow(DrawingObject);}/// <summary>/// 保留两位小数/// </summary>/// <returns></returns>public string TwoDecimalPlaces(HTuple value){return decimal.Round(decimal.Parse(value.ToString()), 2).ToString();}/// <summary>/// 序列化/// </summary>/// <returns></returns>public abstract override string ToString();/// <summary>/// 刷新事件/// </summary>public abstract void Reflash(HDrawingObject drawid, HWindow window, string type);}
}

矩形抽象改造

using HalconDotNet;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace HalconExtension.Models
{/// <summary>/// 矩形封装/// </summary>public class HRectangleObj : HObjBase{public HTuple HType { get; private set; }public HTuple Row1 { get; private set; }public HTuple Row2 { get; private set; }public HTuple Column1 { get; private set; }public HTuple Column2 { get; private set; }/// <summary>/// 刷新回调/// </summary>public Action<HRectangleObj> RefleshCallBack { get; set; }/// <summary>/// 初始化构造函数/// </summary>/// <param name="windowControlWPF"></param>/// <param name="row1"></param>/// <param name="column1"></param>/// <param name="row2"></param>/// <param name="column2"></param>public HRectangleObj(HSmartWindowControlWPF windowControlWPF, HTuple row1, HTuple column1, HTuple row2, HTuple column2) : base(windowControlWPF){//WindowControlWPF = windowControlWPF;Row1 = row1;Column1 = column1;Row2 = row2;Column2 = column2;DrawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE1, Row1, Column1, Row2, Column2);//添加更新事件DrawingObject.OnDrag(Reflash);DrawingObject.OnResize(Reflash);}/// <summary>/// 默认构造函数/// </summary>/// <param name="windowControl"></param>public HRectangleObj(HSmartWindowControlWPF windowControl) : base(windowControl){Row1 = 0;Column1 = 0;Row2 = 100;Column2 = 100;DrawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE1, Row1, Column1, Row2, Column2);//添加更新事件DrawingObject.OnDrag(Reflash);DrawingObject.OnResize(Reflash);}/// <summary>/// 序列化输出/// </summary>/// <returns></returns>public override string ToString(){return JsonConvert.SerializeObject(new{type = HType.ToString(),row1 = TwoDecimalPlaces(Row1),column1 = TwoDecimalPlaces(Column1),row2 = TwoDecimalPlaces(Row2),column2 = TwoDecimalPlaces(Column2)});}public override void Reflash(HDrawingObject drawid, HWindow window, string type){HType = drawid.GetDrawingObjectParams("type");Row1 = drawid.GetDrawingObjectParams("row1");Row2 = drawid.GetDrawingObjectParams("row2");Column1 = drawid.GetDrawingObjectParams("column1");Column2 = drawid.GetDrawingObjectParams("column2");//将本身回调RefleshCallBack(this);}}
}

圆形抽象封装

如果集成抽象的对象只有一个，那么抽象就没有意义了。抽象一定是多个类继承才有使用的实际意义。

代码

using HalconDotNet;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace HalconExtension.Models
{public class HCircleObj : HObjBase{public HTuple Row { get; set; }public HTuple Column { get; set; }public HTuple Radius { get; set; }public HTuple HType { get; private set; }/// <summary>/// 刷新回调/// </summary>public Action<HCircleObj> RefleshCallBack { get; set; }public HCircleObj(HSmartWindowControlWPF windowControlWPF, HTuple row, HTuple col, HTuple radius):base(windowControlWPF){Row = row;Column = col;Radius = radius;DrawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.CIRCLE, Row, Column, Radius);//添加更新事件DrawingObject.OnDrag(Reflash);DrawingObject.OnResize(Reflash);}public HCircleObj(HSmartWindowControlWPF windowControlWPF) : this(windowControlWPF,64,64,64){}public override void Reflash(HDrawingObject drawid, HWindow window, string type){HType = drawid.GetDrawingObjectParams("type");Row = drawid.GetDrawingObjectParams("row");Column = drawid.GetDrawingObjectParams("column");Radius = drawid.GetDrawingObjectParams("radius");//将本身回调RefleshCallBack(this);}public override string ToString(){return JsonConvert.SerializeObject(new{type = HType.ToString(),row = TwoDecimalPlaces(Row),column = TwoDecimalPlaces(Column),radius = TwoDecimalPlaces(Radius),});}}
}

运行结果