状态栏右下角显示图像像素坐标和灰度

XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml

@@ -41,6 +41,7 @@
                             MouseLeftButtonDown="Canvas_MouseLeftButtonDown"
                             MouseLeftButtonUp="Canvas_MouseLeftButtonUp"
                             MouseMove="Canvas_MouseMove"
+                            MouseLeave="Canvas_MouseLeave"
                             MouseRightButtonDown="Canvas_MouseRightButtonDown"
                             PreviewMouseRightButtonUp="Canvas_PreviewMouseRightButtonUp">
 

XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs

@@ -299,6 +299,19 @@ namespace XP.ImageProcessing.RoiControl.Controls
             set => SetValue(ShowCrosshairProperty, value);
         }
 
+        // ── 光标信息（像素坐标 + 灰度值）──
+
+        public static readonly DependencyProperty CursorInfoProperty =
+            DependencyProperty.Register(nameof(CursorInfo), typeof(string), typeof(PolygonRoiCanvas),
+                new PropertyMetadata("X: --  Y: --  Gray: --"));
+
+        /// <summary>鼠标在图像上的像素坐标和灰度值，格式: "X: 123  Y: 456  Gray: 128"</summary>
+        public string CursorInfo
+        {
+            get => (string)GetValue(CursorInfoProperty);
+            set => SetValue(CursorInfoProperty, value);
+        }
+
         private Line _crosshairH, _crosshairV;
 
         private static void OnShowCrosshairChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
@@ -1739,6 +1752,38 @@ namespace XP.ImageProcessing.RoiControl.Controls
 
         #region Mouse Events
 
+        private void UpdateCursorInfo(Point pos)
+        {
+            if (ImageSource == null)
+            {
+                CursorInfo = "X: --  Y: --  Gray: --";
+                return;
+            }
+
+            int px = (int)pos.X, py = (int)pos.Y;
+            string grayText = "--";
+
+            if (ImageSource is BitmapSource bmp && px >= 0 && py >= 0 && px < bmp.PixelWidth && py < bmp.PixelHeight)
+            {
+                try
+                {
+                    var pixel = new byte[4];
+                    var converted = new FormatConvertedBitmap(bmp, PixelFormats.Bgra32, null, 0);
+                    converted.CopyPixels(new System.Windows.Int32Rect(px, py, 1, 1), pixel, 4, 0);
+                    int gray = (int)(pixel[2] * 0.299 + pixel[1] * 0.587 + pixel[0] * 0.114);
+                    grayText = gray.ToString();
+                }
+                catch { }
+            }
+
+            CursorInfo = $"X: {px}  Y: {py}  Gray: {grayText}";
+        }
+
+        private void Canvas_MouseLeave(object sender, MouseEventArgs e)
+        {
+            CursorInfo = "X: --  Y: --  Gray: --";
+        }
+
         private void Canvas_MouseWheel(object sender, MouseWheelEventArgs e)
         {
             double oldZoom = ZoomScale;
@@ -1881,6 +1926,9 @@ namespace XP.ImageProcessing.RoiControl.Controls
                     lastMousePosition = currentPosition;
                 }
             }
+
+            // 更新光标信息（像素坐标 + 灰度值）
+            UpdateCursorInfo(e.GetPosition(mainCanvas));
         }
 
         private void Canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

XplorePlane/ViewModels/Main/MainViewModel.cs

@@ -265,6 +265,13 @@ namespace XplorePlane.ViewModels
         public string CncStatusMessage => _cncEditorViewModel.StatusMessage;
         public bool CncHasExecutionError => _cncEditorViewModel.HasExecutionError;
 
+        private string _cursorInfoText = "X: --  Y: --  Gray: --";
+        public string CursorInfoText
+        {
+            get => _cursorInfoText;
+            set => SetProperty(ref _cursorInfoText, value);
+        }
+
         private void ShowWindow(Window window, string name)
         {
             window.Owner = Application.Current.MainWindow;

XplorePlane/Views/Main/MainWindow.xaml

@@ -580,7 +580,7 @@
                     FontFamily="Consolas"
                     FontSize="11"
                     Foreground="White"
-                    Text="x: 0  y: 0" />
+                    Text="{Binding CursorInfoText}" />
             </Grid>
         </Border>
     </Grid>

XplorePlane/Views/Main/ViewportPanelView.xaml.cs

@@ -17,13 +17,19 @@ namespace XplorePlane.Views
     {
         private MainViewModel _mainVm;
 
-        private void SetStatus(string msg)
+        private MainViewModel GetMainVm()
         {
             if (_mainVm == null)
             {
                 try { _mainVm = ContainerLocator.Current?.Resolve<MainViewModel>(); } catch { }
             }
-            if (_mainVm != null) _mainVm.StatusMessage = msg;
+            return _mainVm;
+        }
+
+        private void SetStatus(string msg)
+        {
+            var vm = GetMainVm();
+            if (vm != null) vm.StatusMessage = msg;
         }
 
         public ViewportPanelView()
@@ -113,6 +119,15 @@ namespace XplorePlane.Views
                 }, Prism.Events.ThreadOption.UIThread);
             }
             catch { }
+
+            // 光标信息：从 RoiCanvas.CursorInfo 同步到 MainViewModel
+            var cursorInfoDesc = System.ComponentModel.DependencyPropertyDescriptor.FromProperty(
+                PolygonRoiCanvas.CursorInfoProperty, typeof(PolygonRoiCanvas));
+            cursorInfoDesc?.AddValueChanged(RoiCanvas, (s, e) =>
+            {
+                var vm = GetMainVm();
+                if (vm != null) vm.CursorInfoText = RoiCanvas.CursorInfo;
+            });
         }
 
         private void OnDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)