XplorePlane/XplorePlane/Views/ImageProcessing/EdgeLineFitPanel.xaml.cs

using System.Windows;
using Prism.Ioc;
using XP.ImageProcessing.RoiControl.Controls;
using XplorePlane.Services.MainViewport;
using XplorePlane.ViewModels.ImageProcessing;

namespace XplorePlane.Views.ImageProcessing
{
    public partial class EdgeLineFitPanel : Window
    {
        public EdgeLineFitPanel()
        {
            InitializeComponent();

            var viewportService = ContainerLocator.Current?.Resolve<IMainViewportService>();
            DataContext = new EdgeLineFitViewModel(viewportService);

            Loaded += (s, e) =>
            {
                var mainWin = Owner as MainWindow;
                if (mainWin != null)
                {
                    var canvas = FindChild<PolygonRoiCanvas>(mainWin);
                    if (DataContext is EdgeLineFitViewModel vm)
                    {
                        vm.SetCanvas(canvas);
                        // 自动进入绘制模式
                        vm.DrawCaliperCommand.Execute();
                    }
                }
            };

            Closed += (s, e) =>
            {
                if (DataContext is EdgeLineFitViewModel vm)
                    vm.OnPanelClosed();
            };
        }

        private static T FindChild<T>(DependencyObject parent) where T : DependencyObject
        {
            int count = System.Windows.Media.VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < count; i++)
            {
                var child = System.Windows.Media.VisualTreeHelper.GetChild(parent, i);
                if (child is T t) return t;
                var result = FindChild<T>(child);
                if (result != null) return result;
            }
            return null;
        }
    }
}