C#调用halcon实现使用鼠标滚轮对图片进行缩放显示

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using HalconDotNet;
 
namespace WindowsFormsApp8
{
    public partial class Form1 : Form
    {
 
        HWindow window;
        HImage image;
        String imagePath = @"..\..\image\apple_1.png";
 
 
        public Form1()
        {
            InitializeComponent();
            window = hWindowControl1.HalconWindow;
            image = new HImage();
            this.hWindowControl1.MouseWheel += new MouseEventHandler(hWindowControl1_MouseWheel);
            //这里自己写代码绑定鼠标滚轮事件，HMouseWheel事件好像不太管用
 
        }
 
        private void hWindowControl1_MouseWheel(object sender, MouseEventArgs e)
        {
            //先获得窗口相对于图片的实际位置
            window.GetPart(out int row1, out int col1, out int row2, out int col2);
            if (e.Delta > 0)
            {
 
                window.SetPart(row1 - 5, col1 - 5, row2 + 5, col2 + 5);//扩大窗口，缩小图片显示
            }
            else
            {
                if (row1 + 5 < row2 - 5 && col1 + 5 < col2 - 5)//保证窗口可视
                {
                    window.SetPart(row1 + 5, col1 + 5, row2 - 5, col2 - 5);//缩小窗口，增强图片细节显示，类似于放大图片
                }
 
            }
 
            window.DispObj(image);
 
        }
 
        private void btn_loadimage_Click(object sender, EventArgs e)
        {
            image.ReadImage(imagePath);
            image.GetImageSize(out int width, out int height);
            window.DispObj(image);
            tb_width.Text = width.ToString();
            tb_height.Text = height.ToString();
 
        }
 
 
 
        private void hWindowControl1_HMouseDown(object sender, HMouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                //右键弹出自定义菜单
                contextMenuStrip1.Show(MousePosition.X, MousePosition.Y);
            }
        }
 
        private void 适中ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            image.GetImageSize(out int width, out int height);
            window.SetPart(0, 0, height, width);//窗口适中显示图片
            window.DispObj(image);
        }
    }
}