add:展台

Ink Canvas/MainWindow.xaml

@@ -10558,6 +10558,22 @@
                         HorizontalAlignment="Center"
                         VerticalAlignment="Center"
                         Orientation="Horizontal">
+                        <ToggleButton
+                            x:Name="BtnToggleVideoPresenterLiveOnCanvas"
+                            Width="90"
+                            Height="40"
+                            Margin="3,0"
+                            Background="{DynamicResource FloatBarBackground}"
+                            BorderBrush="{DynamicResource FloatBarBorderBrush}"
+                            BorderThickness="1"
+                            Checked="BtnToggleVideoPresenterLiveOnCanvas_Checked"
+                            Unchecked="BtnToggleVideoPresenterLiveOnCanvas_Unchecked">
+                            <TextBlock
+                                FontSize="12"
+                                FontWeight="SemiBold"
+                                Foreground="{DynamicResource FloatBarForeground}"
+                                Text="上屏" />
+                        </ToggleButton>
                         <ToggleButton
                             x:Name="CheckBoxEnablePhotoCorrection"
                             Width="110"

Ink Canvas/MainWindow_cs/MW_BoardControls.cs

@@ -1,4 +1,4 @@
-using Ink_Canvas.Helpers;
+using Ink_Canvas.Helpers;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -47,6 +47,10 @@ namespace Ink_Canvas
             {
                 if (child is Image || child is MediaElement)
                 {
+                    if (child is Image img && img.Tag is string tag && tag == VideoPresenterLiveFrameTag)
+                    {
+                        continue;
+                    }
                     if (!elementsInHistory.Contains(child))
                     {
                         timeMachine.CommitElementInsertHistory(child);
@@ -288,12 +292,14 @@ namespace Ink_Canvas
                 currentSelectedElement = null;
             }
 
+            VideoPresenter_BeforePageLeave();
             SaveStrokes();
 
             ClearStrokes(true);
             CurrentWhiteboardIndex--;
 
             RestoreStrokes();
+            VideoPresenter_OnPageChanged();
 
             UpdateIndexInfoDisplay();
         }
@@ -322,12 +328,14 @@ namespace Ink_Canvas
                 currentSelectedElement = null;
             }
 
+            VideoPresenter_BeforePageLeave();
             SaveStrokes();
 
             ClearStrokes(true);
             CurrentWhiteboardIndex++;
 
             RestoreStrokes();
+            VideoPresenter_OnPageChanged();
 
             UpdateIndexInfoDisplay();
         }
@@ -349,6 +357,7 @@ namespace Ink_Canvas
                 currentSelectedElement = null;
             }
 
+            VideoPresenter_BeforePageLeave();
             SaveStrokes();
             ClearStrokes(true);
 
@@ -364,6 +373,7 @@ namespace Ink_Canvas
 
             // 恢复新页面（这会清空画布，因为历史记录为null）
             RestoreStrokes();
+            VideoPresenter_OnPageChanged();
 
             UpdateIndexInfoDisplay();
 

Ink Canvas/MainWindow_cs/MW_VideoPresenter.cs

@@ -18,12 +18,22 @@ namespace Ink_Canvas
 {
     public partial class MainWindow : Window
     {
+        // 标记：用于在保存/恢复白板内容时排除“展台实时上屏”画面
+        private const string VideoPresenterLiveFrameTag = "__VideoPresenterLiveFrame";
+
         private CameraService _cameraService;
         private readonly object _videoPresenterFrameLock = new object();
         private Bitmap _lastFrame;
 
         private readonly List<CapturedImage> _capturedPhotos = new List<CapturedImage>();
 
+        // 按页绑定：每一页对应一个“实时画面”元素与布局/设备信息
+        private readonly Dictionary<int, System.Windows.Controls.Image> _liveFrameImageByPage = new Dictionary<int, System.Windows.Controls.Image>();
+        private readonly HashSet<int> _liveEnabledPages = new HashSet<int>();
+        private readonly Dictionary<int, int> _cameraIndexByPage = new Dictionary<int, int>();
+        private readonly Dictionary<int, (double left, double top, double width)> _liveFrameLayoutByPage =
+            new Dictionary<int, (double left, double top, double width)>();
+
         private DateTime _lastCaptureTime = DateTime.MinValue;
         private const int VideoPresenterCaptureCooldownMs = 1000;
 
@@ -53,6 +63,12 @@ namespace Ink_Canvas
             {
                 CheckBoxEnablePhotoCorrection.IsChecked = Settings?.Automation?.IsEnablePhotoCorrection ?? false;
             }
+
+            // 同步“上屏”按钮状态（按页绑定）
+            if (BtnToggleVideoPresenterLiveOnCanvas != null)
+            {
+                BtnToggleVideoPresenterLiveOnCanvas.IsChecked = _liveEnabledPages.Contains(GetCurrentPageIndex());
+            }
         }
 
         private void BtnCloseVideoPresenter_Click(object sender, RoutedEventArgs e)
@@ -119,6 +135,9 @@ namespace Ink_Canvas
                     {
                         BtnCapturePhoto.IsEnabled = true;
                     }
+
+                    // 实时上屏：刷新当前页的画面元素
+                    TryUpdateLiveFrameOnCanvas(preview);
                 }));
             }
             catch
@@ -127,6 +146,68 @@ namespace Ink_Canvas
             }
         }
 
+        private int GetCurrentPageIndex()
+        {
+            return Math.Max(1, CurrentWhiteboardIndex);
+        }
+
+        private void TryUpdateLiveFrameOnCanvas(BitmapImage preview)
+        {
+            try
+            {
+                int page = GetCurrentPageIndex();
+                if (!_liveEnabledPages.Contains(page)) return;
+                if (inkCanvas == null) return;
+                if (!_liveFrameImageByPage.TryGetValue(page, out var img) || img == null) return;
+
+                if (!inkCanvas.Children.Contains(img))
+                {
+                    inkCanvas.Children.Add(img);
+                }
+
+                img.Source = preview;
+                img.Visibility = Visibility.Visible;
+            }
+            catch { }
+        }
+
+        private System.Windows.Controls.Image EnsureLiveFrameElementForPage(int page)
+        {
+            if (_liveFrameImageByPage.TryGetValue(page, out var existing) && existing != null) return existing;
+
+            var img = new System.Windows.Controls.Image
+            {
+                Tag = VideoPresenterLiveFrameTag,
+                Stretch = System.Windows.Media.Stretch.Uniform,
+                Width = 520,
+                Visibility = Visibility.Visible,
+                Opacity = 1.0
+            };
+            _liveFrameImageByPage[page] = img;
+            return img;
+        }
+
+        private void ApplyLiveFrameLayoutForPage(int page, System.Windows.Controls.Image img)
+        {
+            if (img == null) return;
+
+            if (_liveFrameLayoutByPage.TryGetValue(page, out var layout))
+            {
+                if (!double.IsNaN(layout.width) && layout.width > 10) img.Width = layout.width;
+                InkCanvas.SetLeft(img, Math.Max(0, layout.left));
+                InkCanvas.SetTop(img, Math.Max(0, layout.top));
+                return;
+            }
+
+            // 默认位置：居中偏上
+            double x = (inkCanvas?.ActualWidth ?? 0) / 2 - img.Width / 2;
+            double y = (inkCanvas?.ActualHeight ?? 0) / 2 - 200;
+            if (double.IsNaN(x) || double.IsInfinity(x)) x = 100;
+            if (double.IsNaN(y) || double.IsInfinity(y)) y = 100;
+            InkCanvas.SetLeft(img, Math.Max(0, x));
+            InkCanvas.SetTop(img, Math.Max(0, y));
+        }
+
         private void RefreshVideoPresenterDeviceList()
         {
             if (_cameraService == null) return;
@@ -184,6 +265,7 @@ namespace Ink_Canvas
             try
             {
                 EnsureCameraService();
+                _cameraIndexByPage[GetCurrentPageIndex()] = cameraIndex;
                 if (_cameraService.StartPreview(cameraIndex))
                 {
                     if (BtnCapturePhoto != null) BtnCapturePhoto.IsEnabled = true;
@@ -195,6 +277,101 @@ namespace Ink_Canvas
             }
         }
 
+        private void BtnToggleVideoPresenterLiveOnCanvas_Checked(object sender, RoutedEventArgs e)
+        {
+            int page = GetCurrentPageIndex();
+            _liveEnabledPages.Add(page);
+
+            var img = EnsureLiveFrameElementForPage(page);
+            ApplyLiveFrameLayoutForPage(page, img);
+
+            if (inkCanvas != null && !inkCanvas.Children.Contains(img))
+            {
+                inkCanvas.Children.Add(img);
+            }
+
+            // 立即用侧栏预览刷新一次
+            if (VideoPresenterPreviewImage?.Source is BitmapImage bi)
+            {
+                img.Source = bi;
+            }
+        }
+
+        private void BtnToggleVideoPresenterLiveOnCanvas_Unchecked(object sender, RoutedEventArgs e)
+        {
+            int page = GetCurrentPageIndex();
+            _liveEnabledPages.Remove(page);
+
+            if (_liveFrameImageByPage.TryGetValue(page, out var img) && img != null)
+            {
+                try
+                {
+                    if (inkCanvas != null && inkCanvas.Children.Contains(img))
+                    {
+                        inkCanvas.Children.Remove(img);
+                    }
+                }
+                catch { }
+            }
+        }
+
+        // 翻页前调用：保存当前页实时画面的位置/大小
+        private void VideoPresenter_BeforePageLeave()
+        {
+            try
+            {
+                int page = GetCurrentPageIndex();
+                if (!_liveFrameImageByPage.TryGetValue(page, out var img) || img == null) return;
+
+                double left = InkCanvas.GetLeft(img);
+                double top = InkCanvas.GetTop(img);
+                if (double.IsNaN(left)) left = 0;
+                if (double.IsNaN(top)) top = 0;
+
+                _liveFrameLayoutByPage[page] = (left, top, img.Width);
+            }
+            catch { }
+        }
+
+        // 翻页后调用：根据该页状态恢复实时画面，并同步设备选择
+        private void VideoPresenter_OnPageChanged()
+        {
+            try
+            {
+                int page = GetCurrentPageIndex();
+
+                // 同步“上屏”按钮状态
+                if (BtnToggleVideoPresenterLiveOnCanvas != null)
+                {
+                    BtnToggleVideoPresenterLiveOnCanvas.IsChecked = _liveEnabledPages.Contains(page);
+                }
+
+                // 若该页上屏，恢复画面元素（RestoreStrokes 会清空 inkCanvas.Children）
+                if (_liveEnabledPages.Contains(page))
+                {
+                    var img = EnsureLiveFrameElementForPage(page);
+                    ApplyLiveFrameLayoutForPage(page, img);
+                    if (inkCanvas != null && !inkCanvas.Children.Contains(img))
+                    {
+                        inkCanvas.Children.Add(img);
+                    }
+
+                    if (VideoPresenterPreviewImage?.Source is BitmapImage bi)
+                    {
+                        img.Source = bi;
+                    }
+                }
+
+                // 按页摄像头索引：切页后自动切回该页的摄像头
+                if (_cameraIndexByPage.TryGetValue(page, out int idx))
+                {
+                    EnsureCameraService();
+                    _cameraService?.StartPreview(idx);
+                }
+            }
+            catch { }
+        }
+
         private void BtnCapturePhoto_Click(object sender, RoutedEventArgs e)
         {
             try