AHAQ_QGNH/AnQing/View/ImageSetUp.xaml.cs

using AnQing.Commons;
using Microsoft.Win32;
using RGD.DBUtility;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace AnQing.View
{
    /// <summary>
    /// ImageSetUp.xaml 的交互逻辑
    /// </summary>
    public partial class ImageSetUp : UserControl
    {
        private Point startPoint;
        private bool isDragging = false;
        private string imagePath;
        private double scaleRatio = 1; // 记录缩放比例
        private int originalWidth, originalHeight; // 记录原图尺寸

        public ImageSetUp(string path)
        {
            InitializeComponent();
            SelectionCanvas.MouseDown += SelectionCanvas_MouseDown;
            SelectionCanvas.MouseMove += SelectionCanvas_MouseMove;
            SelectionCanvas.MouseUp += SelectionCanvas_MouseUp;
            imagePath = path;
            ImageView();
        }
         // 选择图片
        private void SelectImage_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog
            {
                Filter = "图片文件 (*.jpg;*.png;*.bmp)|*.jpg;*.png;*.bmp"
            };

            if (openFileDialog.ShowDialog() == true)
            {
                imagePath = openFileDialog.FileName;
                ImageView();
            }
        }
        public void ImageView()
        {
            BitmapImage bitmap = new BitmapImage(new Uri(imagePath));

            // 记录原始尺寸
            originalWidth = bitmap.PixelWidth;
            originalHeight = bitmap.PixelHeight;

            // 计算缩放比例，使高度 = 560
            scaleRatio = 560.0 / originalHeight;

            // 设置缩放后的图片
            int scaledWidth = (int)(originalWidth * scaleRatio);
            int scaledHeight = (int)(originalHeight * scaleRatio);

            BitmapImage resizedBitmap = new BitmapImage();
            resizedBitmap.BeginInit();
            resizedBitmap.UriSource = new Uri(imagePath);
            resizedBitmap.DecodePixelHeight = scaledHeight; // 按高度缩放
            resizedBitmap.EndInit();

            MainImage.Source = resizedBitmap;
            SelectionCanvas.Width = scaledWidth;
            SelectionCanvas.Height = scaledHeight;
        }
        // 鼠标按下，开始选择区域
        private void SelectionCanvas_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (MainImage.Source == null) return;

            isDragging = true;
            startPoint = e.GetPosition(SelectionCanvas);

            Canvas.SetLeft(SelectionRectangle, startPoint.X);
            Canvas.SetTop(SelectionRectangle, startPoint.Y);
            SelectionRectangle.Width = 0;
            SelectionRectangle.Height = 0;
            SelectionRectangle.Visibility = Visibility.Visible;
        }

        // 鼠标移动，动态调整选取框
        private void SelectionCanvas_MouseMove(object sender, MouseEventArgs e)
        {
            if (isDragging)
            {
                Point currentPoint = e.GetPosition(SelectionCanvas);

                double x = Math.Min(currentPoint.X, startPoint.X);
                double y = Math.Min(currentPoint.Y, startPoint.Y);
                double width = Math.Abs(currentPoint.X - startPoint.X);
                double height = Math.Abs(currentPoint.Y - startPoint.Y);

                Canvas.SetLeft(SelectionRectangle, x);
                Canvas.SetTop(SelectionRectangle, y);
                SelectionRectangle.Width = width;
                SelectionRectangle.Height = height;
            }
        }

        // 鼠标松开，完成选区
        private void SelectionCanvas_MouseUp(object sender, MouseButtonEventArgs e)
        {
            isDragging = false;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            // 释放图像或其他资源
            if (MainImage.Source is BitmapImage bitmapImage)
            {
                // 关闭图像流
                bitmapImage.StreamSource?.Close();
            }
            DbHelperSQL.ExecuteSql($"INSERT INTO IMAGEINFO (x, y, width, height,[index]) VALUES ({originalX}, {originalY}, {originalWidthSelected}, {originalHeightSelected},1)");
            Common.main.mianWindowViewModel.GetPossibleRegions();
            Common.MenuViewQuit();
        }
        int originalX, originalY, originalWidthSelected, originalHeightSelected;
        // 获取选区数据（转换为原图尺寸）
        private void GetSelectionData_Click(object sender, RoutedEventArgs e)
        {
            if (MainImage.Source == null || SelectionRectangle.Visibility == Visibility.Collapsed)
            {
                MessageBox.Show("请先选择图片并框选区域！");
                return;
            }

            // 获取缩小后的选区坐标
            double scaledX = Canvas.GetLeft(SelectionRectangle);
            double scaledY = Canvas.GetTop(SelectionRectangle);
            double scaledWidth = SelectionRectangle.Width;
            double scaledHeight = SelectionRectangle.Height;

            // 转换回原图尺寸
            originalX = (int)(scaledX / scaleRatio);
            originalY = (int)(scaledY / scaleRatio);
            originalWidthSelected = (int)(scaledWidth / scaleRatio);
            originalHeightSelected = (int)(scaledHeight / scaleRatio);

            // 显示选区数据
            string selectionInfo = $"原图坐标: X={originalX}, Y={originalY}, 宽={originalWidthSelected}, 高={originalHeightSelected}";
            InfoText.Text = selectionInfo;
            //MessageBox.Show(selectionInfo);
        }
    
    }
}