【C#】WPF实现HaIcon图像缩放、移动

1.HaIcon实现的C#代码

//
//  File generated by HDevelop for HALCON/DOTNET (C#) Version 12.0
//
//  This file is intended to be used with the HDevelopTemplate or
//  HDevelopTemplateWPF projects located under %HALCONEXAMPLES%\c#

using System;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using HalconDotNet;

public partial class HalconImageHandle
{
    HTuple? hv_ExpDefaultWinHandle, RowDown, ColDown;
    HObject? ho_Image;
    bool isMouseDown = false;

    /// <summary>
    /// 鼠标按下
    /// </summary>
    public void MouseDown()
    {
        try
        {
            HTuple Row, Column, Button;
            //返回鼠标当前按下点的图像坐标
            HOperatorSet.GetMposition(hv_ExpDefaultWinHandle, out Row, out Column, out Button);
            RowDown = Row;    //鼠标按下时的行坐标
            ColDown = Column; //鼠标按下时的列坐标
            if (Button.I == 1)//左键嗯下值为1
                isMouseDown = true;
        }
        catch (Exception)
        {

            throw;
        }
    }

    /// <summary>
    /// 鼠标提起
    /// </summary>
    public void MouseUp()
    {
        try
        {
            if (isMouseDown)
            {
                isMouseDown = false;
            }
        }
        catch (Exception)
        {
        }
    }

    /// <summary>
    /// 移动
    /// </summary>
    /// <param name="x"></param>
    /// <param name="y"></param>
    public void imagetrans()
    {
        try
        {
            if (!isMouseDown)
            {
                return;
            }
            HTuple Row, Column, Button;
            //获取当前鼠标的坐标值
            HOperatorSet.GetMposition(hv_ExpDefaultWinHandle, out Row, out Column, out Button);
            double RowMove = Row - RowDown;   //鼠标弹起时的行坐标减去按下时的行坐标，得到行坐标的移动值
            double ColMove = Column - ColDown;//鼠标弹起时的列坐标减去按下时的列坐标，得到列坐标的移动值
            HTuple row1, col1, row2, col2;

            //得到当前的窗口坐标
            HOperatorSet.GetPart(hv_ExpDefaultWinHandle, out row1, out col1, out row2, out col2);
            //移动后的左上角和右下角坐标，这里可能有些不好理解。以左上角原点为参考点
            HOperatorSet.SetPart(hv_ExpDefaultWinHandle, row1 - RowMove, col1 - ColMove, row2 - RowMove, col2 - ColMove);

            HOperatorSet.ClearWindow(hv_ExpDefaultWinHandle);
            HOperatorSet.DispObj(ho_Image, hv_ExpDefaultWinHandle);
        }
        catch (Exception)
        {

            throw;
        }
    }

    /// <summary>
    /// 缩放
    /// </summary>
    /// <param name="Zoom"></param>
    public void imagescale(HTuple Zoom)
    {
        try
        {
            //放大倍数，当前鼠标选择的图像点坐标Row, Col，按下鼠标的左键还是右键：o-没按下，1-左键，2-中键，4-右键
            HTuple Row, Col, Button;
            HTuple RowLeftUpper, ColumnLeftUpper, RowRightLower, ColumnRightLower, Ht, Wt, ImagePartRowLeftUp, ImagePartColLeftUp, ImagePartRowRightLow, ImagePartColRightLow;
            //返回输出窗口中鼠标指针和鼠标按钮所按下的像素精确图像坐标，输出当前鼠标指针点的图像坐标以及按下的是鼠标左键还是右键，0是鼠标左键
            HOperatorSet.GetMposition(hv_ExpDefaultWinHandle, out Row, out Col, out Button);
            //Get part返回窗口中显示的图像部分的左上角和右下角

            //得到当前的窗口坐标,Row0:图像部分左上角的行索引,Column0:图像部分左上角的列索引，Row00:图像部分右下角的行索引,Column00:图像部分右下角的列索引
            HOperatorSet.GetPart(hv_ExpDefaultWinHandle, out RowLeftUpper, out ColumnLeftUpper, out RowRightLower, out ColumnRightLower);
            //显示的部分图像的高
            Ht = RowRightLower - RowLeftUpper;
            //显示的部分图像的宽
            Wt = ColumnRightLower - ColumnLeftUpper;
            //普通版halcon能处理的图像最大尺寸是32K*32K。如果无限缩小原图像，导致显示的图像超出限制，则会造成程序崩溃
            if (Ht * Wt < 32000 * 32000 || Zoom == 1.5)
            {
                //显示的放大或者缩小部分图像的左上角和右下角坐标
                ImagePartRowLeftUp = (RowLeftUpper + ((1 - (1.0 / Zoom)) * (Row - RowLeftUpper)));
                ImagePartColLeftUp = (ColumnLeftUpper + ((1 - (1.0 / Zoom)) * (Col - ColumnLeftUpper)));
                ImagePartRowRightLow = ImagePartRowLeftUp + (Ht / Zoom);
                ImagePartColRightLow = ImagePartColLeftUp + (Wt / Zoom);
                //设置部分显示图像
                HOperatorSet.SetPart(hv_ExpDefaultWinHandle, ImagePartRowLeftUp, ImagePartColLeftUp, ImagePartRowRightLow, ImagePartColRightLow);
                HOperatorSet.ClearWindow(hv_ExpDefaultWinHandle);
                HOperatorSet.DispObj(ho_Image, hv_ExpDefaultWinHandle);
            }
        }
        catch (Exception)
        {

            throw;
        }
    }

    // Main procedure 
    private void action(String filePath)
    {
        HOperatorSet.GenEmptyObj(out ho_Image);
        HOperatorSet.ReadImage(out ho_Image, filePath);
        HOperatorSet.DispObj(ho_Image, hv_ExpDefaultWinHandle);
    }

    public void InitHalcon()
    {
        // Default settings used in HDevelop 
        HOperatorSet.SetSystem("width", 512);
        HOperatorSet.SetSystem("height", 512);
    }

    public void RunHalcon(HTuple Window, String filePath)
    {
        hv_ExpDefaultWinHandle = Window;
        action(filePath);
    }

    public void Dispose()
    {
        ho_Image?.Dispose();
    }
}

2.WPF实现
2.1控件引用

<halcon:HWindowControlWPF
    x:Name="HW_Gerber"
    Grid.Row="1"
    Grid.Column="0"
    Grid.ColumnSpan="2"
    Margin="1,0,1,1"
    HMouseDown="HW_Gerber_HMouseDown"
    HMouseMove="HW_Gerber_HMouseMove"
    HMouseUp="HW_Gerber_HMouseUp"
    HMouseWheel="HW_Gerber_HMouseWheel" />

2.2后台cs实现

private void HW_Gerber_HMouseDown(object sender, HMouseEventArgsWPF e)
{
    try
    {
        boardTestImageViewModel?.MouseDown();
    }
    catch (Exception)
    {
    }
}

private void HW_Gerber_HMouseMove(object sender, HMouseEventArgsWPF e)
{
    try
    {
        boardTestImageViewModel?.MouseMove();
    }
    catch (Exception)
    {
    }
}

private void HW_Gerber_HMouseWheel(object sender, HMouseEventArgsWPF e)
{
    try
    {
        HTuple Zoom;
        //鼠标向上滚动表示放大
        if (e.Delta > 0)
        {
            Zoom = 1.2;
        }
        //向下滚动缩小
        else
        {
            Zoom = 0.8;
        }
        boardTestImageViewModel?.MouseWheel(Zoom);

    }
    catch (Exception)
    {
    }
}

private void HW_Gerber_HMouseUp(object sender, HMouseEventArgsWPF e)
{
    boardTestImageViewModel?.MouseUp();
}

2.3后台viewmodel实现

HalconImageHandle imageHandle = new HalconImageHandle();
/// <summary>
 /// 加载图像
 /// </summary>
 /// <param name="fileName"></param>
 private void LoadImage(string fileName)
 {
     Task.Factory.StartNew(() =>
     {
         Thread.Sleep(1000);
         string filePath = Path.Combine(DirPath, fileName);
         imageHandle.RunHalcon(page?.HW_Gerber.HalconWindow, filePath);
     });
 }

 /// <summary>
 /// 图像缩放
 /// </summary>
 /// <param name="Zoom"></param>
 public void MouseWheel(HTuple Zoom)
 {
     imageHandle.imagescale(Zoom);
 }
   
 /// <summary>
 /// 鼠标移动
 /// </summary>
 public void MouseMove()
 {
     imageHandle.imagetrans();
 }

 /// <summary>
 /// 鼠标按下
 /// </summary>
 public void MouseDown()
 {
     imageHandle.MouseDown();
 }

 /// <summary>
 /// 鼠标放开
 /// </summary>
 public void MouseUp()
 {
     imageHandle.MouseUp();
 }