community/Ink Canvas/MainWindow_cs/MW_SelectionGestures.cs

using Ink_Canvas.Helpers;
using iNKORE.UI.WPF.Modern.Controls;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;
using Point = System.Windows.Point;

namespace Ink_Canvas
{
    public partial class MainWindow : Window
    {
        #region Floating Control

        private object lastBorderMouseDownObject;

        private void Border_MouseDown(object sender, MouseButtonEventArgs e)
        {
            // 如果发送者是 RandomDrawPanel 或 SingleDrawPanel，且它们被隐藏，则不处理事件
            if (sender is SimpleStackPanel panel)
            {
                if ((panel == RandomDrawPanel || panel == SingleDrawPanel) &&
                    panel.Visibility != Visibility.Visible)
                {
                    return;
                }
            }

            lastBorderMouseDownObject = sender;
        }


        private void BorderStrokeSelectionClone_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            try
            {
                var strokes = inkCanvas.GetSelectedStrokes();
                if (strokes.Count > 0)
                {
                    // 直接执行克隆操作，与图片克隆保持一致
                    CloneStrokes(strokes);
                    LogHelper.WriteLogToFile($"墨迹克隆完成: {strokes.Count} 个墨迹");
                }
            }
            catch (Exception ex)
            {
                LogHelper.WriteLogToFile($"墨迹克隆失败: {ex.Message}", LogHelper.LogType.Error);
            }
        }

        private void BorderStrokeSelectionCloneToNewBoard_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            var strokes = inkCanvas.GetSelectedStrokes();
            inkCanvas.Select(new StrokeCollection());
            CloneStrokesToNewBoard(strokes);
        }

        private void BorderStrokeSelectionDelete_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;
            SymbolIconDelete_MouseUp(sender, e);
        }

        private void GridPenWidthDecrease_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;
            ChangeStrokeThickness(0.8);
        }

        private void GridPenWidthIncrease_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;
            ChangeStrokeThickness(1.25);
        }

        private void ChangeStrokeThickness(double multipler)
        {
            foreach (var stroke in inkCanvas.GetSelectedStrokes())
            {
                var newWidth = stroke.DrawingAttributes.Width * multipler;
                var newHeight = stroke.DrawingAttributes.Height * multipler;
                if (!(newWidth >= DrawingAttributes.MinWidth) || !(newWidth <= DrawingAttributes.MaxWidth)
                                                              || !(newHeight >= DrawingAttributes.MinHeight) ||
                                                              !(newHeight <= DrawingAttributes.MaxHeight)) continue;
                stroke.DrawingAttributes.Width = newWidth;
                stroke.DrawingAttributes.Height = newHeight;
            }

            if (DrawingAttributesHistory.Count > 0)
            {

                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }
        }

        private void GridPenWidthRestore_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            foreach (var stroke in inkCanvas.GetSelectedStrokes())
            {
                stroke.DrawingAttributes.Width = inkCanvas.DefaultDrawingAttributes.Width;
                stroke.DrawingAttributes.Height = inkCanvas.DefaultDrawingAttributes.Height;
            }
        }

        private void ImageFlipHorizontal_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            var m = new Matrix();

            // Find center of element and then transform to get current location of center
            var fe = e.Source as FrameworkElement;
            var center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2);
            center = new Point(inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Width / 2,
                inkCanvas.GetSelectionBounds().Top + inkCanvas.GetSelectionBounds().Height / 2);
            center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点

            // Update matrix to reflect translation/rotation
            m.ScaleAt(-1, 1, center.X, center.Y); // 缩放

            var targetStrokes = inkCanvas.GetSelectedStrokes();
            foreach (var stroke in targetStrokes) stroke.Transform(m, false);

            if (DrawingAttributesHistory.Count > 0)
            {
                //var collecion = new StrokeCollection();
                //foreach (var item in DrawingAttributesHistory)
                //{
                //    collecion.Add(item.Key);
                //}
                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }

            //updateBorderStrokeSelectionControlLocation();
        }

        private void ImageFlipVertical_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            var m = new Matrix();

            // Find center of element and then transform to get current location of center
            var fe = e.Source as FrameworkElement;
            var center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2);
            center = new Point(inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Width / 2,
                inkCanvas.GetSelectionBounds().Top + inkCanvas.GetSelectionBounds().Height / 2);
            center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点

            // Update matrix to reflect translation/rotation
            m.ScaleAt(1, -1, center.X, center.Y); // 缩放

            var targetStrokes = inkCanvas.GetSelectedStrokes();
            foreach (var stroke in targetStrokes) stroke.Transform(m, false);

            if (DrawingAttributesHistory.Count > 0)
            {
                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }
        }

        // ... existing code ...
        private void ImageRotate45_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            var m = new Matrix();

            // Find center of element and then transform to get current location of center
            var fe = e.Source as FrameworkElement;
            var center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2);
            center = new Point(inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Width / 2,
                inkCanvas.GetSelectionBounds().Top + inkCanvas.GetSelectionBounds().Height / 2);
            center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点

            // Update matrix to reflect translation/rotation
            m.RotateAt(45, center.X, center.Y); // 顺时针旋转45度

            var targetStrokes = inkCanvas.GetSelectedStrokes();
            foreach (var stroke in targetStrokes) stroke.Transform(m, false);

            if (DrawingAttributesHistory.Count > 0)
            {
                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }
        }

        private void ImageRotate90_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (lastBorderMouseDownObject != sender) return;

            var m = new Matrix();

            // Find center of element and then transform to get current location of center
            var fe = e.Source as FrameworkElement;
            var center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2);
            center = new Point(inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Width / 2,
                inkCanvas.GetSelectionBounds().Top + inkCanvas.GetSelectionBounds().Height / 2);
            center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点

            // Update matrix to reflect translation/rotation
            m.RotateAt(90, center.X, center.Y); // 旋转

            var targetStrokes = inkCanvas.GetSelectedStrokes();
            foreach (var stroke in targetStrokes) stroke.Transform(m, false);

            if (DrawingAttributesHistory.Count > 0)
            {
                var collecion = new StrokeCollection();
                foreach (var item in DrawingAttributesHistory)
                {
                    collecion.Add(item.Key);
                }

                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }
        }

        #endregion

        private bool isGridInkCanvasSelectionCoverMouseDown;
        private bool isStrokeDragging = false;
        private Point strokeDragStartPoint;
        private StrokeCollection StrokesSelectionClone = new StrokeCollection();

        // 选择框和选择点相关变量
        private bool isResizing = false;
        private string currentResizeHandle = "";
        private Point resizeStartPoint;
        private Rect originalSelectionBounds;

        private void GridInkCanvasSelectionCover_MouseDown(object sender, MouseButtonEventArgs e)
        {
            isGridInkCanvasSelectionCoverMouseDown = true;

            // 检查是否有选中的墨迹
            if (inkCanvas.GetSelectedStrokes().Count > 0)
            {
                // 获取鼠标点击位置
                var clickPoint = e.GetPosition(inkCanvas);
                var selectionBounds = inkCanvas.GetSelectionBounds();

                // 检查点击位置是否在选择框边界内
                if (clickPoint.X >= selectionBounds.Left &&
                    clickPoint.X <= selectionBounds.Right &&
                    clickPoint.Y >= selectionBounds.Top &&
                    clickPoint.Y <= selectionBounds.Bottom)
                {
                    // 只有在选择框边界内才允许拖动
                    isStrokeDragging = true;
                    strokeDragStartPoint = clickPoint;
                    GridInkCanvasSelectionCover.CaptureMouse();
                    GridInkCanvasSelectionCover.Cursor = Cursors.SizeAll;
                }
                else
                {
                    // 点击在选择框外，取消选择
                    inkCanvas.Select(new StrokeCollection());
                    GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
                }
            }
        }

        private void GridInkCanvasSelectionCover_MouseMove(object sender, MouseEventArgs e)
        {
            if (!isGridInkCanvasSelectionCoverMouseDown) return;

            // 如果正在拖动墨迹，执行拖动操作
            if (isStrokeDragging && GridInkCanvasSelectionCover.IsMouseCaptured)
            {
                var currentPoint = e.GetPosition(inkCanvas);
                var delta = currentPoint - strokeDragStartPoint;

                // 创建变换矩阵
                var matrix = new Matrix();
                matrix.Translate(delta.X, delta.Y);

                // 对选中的墨迹应用变换
                var selectedStrokes = inkCanvas.GetSelectedStrokes();
                foreach (var stroke in selectedStrokes)
                {
                    stroke.Transform(matrix, false);
                }

                // 更新选中栏位置
                updateBorderStrokeSelectionControlLocation();

                // 更新起始点
                strokeDragStartPoint = currentPoint;
            }
            else if (inkCanvas.GetSelectedStrokes().Count > 0)
            {
                // 当鼠标在选中区域移动时，更新墨迹选中栏位置
                updateBorderStrokeSelectionControlLocation();
            }
        }

        private void GridInkCanvasSelectionCover_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (!isGridInkCanvasSelectionCoverMouseDown) return;

            // 结束墨迹拖动
            if (isStrokeDragging)
            {
                isStrokeDragging = false;
                GridInkCanvasSelectionCover.ReleaseMouseCapture();
                GridInkCanvasSelectionCover.Cursor = Cursors.Arrow;
            }

            isGridInkCanvasSelectionCoverMouseDown = false;

            // 只有在没有选中墨迹时才隐藏选中栏
            if (inkCanvas.GetSelectedStrokes().Count == 0)
            {
                GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
            }
        }

        private void BtnSelect_Click(object sender, RoutedEventArgs e)
        {
            forceEraser = true;
            drawingShapeMode = 0;
            inkCanvas.IsManipulationEnabled = false;
            if (inkCanvas.EditingMode == InkCanvasEditingMode.Select)
            {
                if (inkCanvas.GetSelectedStrokes().Count == inkCanvas.Strokes.Count)
                {
                    // 使用集中化的工具模式切换方法
                    SetCurrentToolMode(InkCanvasEditingMode.Ink,
                        () => { SetCurrentToolMode(InkCanvasEditingMode.Select); });
                }
                else
                {
                    var selectedStrokes = new StrokeCollection();
                    foreach (var stroke in inkCanvas.Strokes)
                        if (stroke.GetBounds().Width > 0 && stroke.GetBounds().Height > 0)
                            selectedStrokes.Add(stroke);
                    inkCanvas.Select(selectedStrokes);
                }
            }
            else
            {
                // 使用集中化的工具模式切换方法
                SetCurrentToolMode(InkCanvasEditingMode.Select);
            }
        }

        private double BorderStrokeSelectionControlWidth = 490.0;
        private double BorderStrokeSelectionControlHeight = 80.0;
        private bool isProgramChangeStrokeSelection;

        private void inkCanvas_SelectionChanged(object sender, EventArgs e)
        {
            if (isProgramChangeStrokeSelection) return;

            // 优先检查墨迹选择状态
            if (inkCanvas.GetSelectedStrokes().Count > 0)
            {
                // 有墨迹被选中，清除图片选择状态
                if (currentSelectedElement != null)
                {
                    currentSelectedElement = null;
                    // 隐藏图片选择工具栏
                    if (BorderImageSelectionControl != null)
                    {
                        BorderImageSelectionControl.Visibility = Visibility.Collapsed;
                    }
                }

                // 显示墨迹选择栏和选择框
                GridInkCanvasSelectionCover.Visibility = Visibility.Visible;
                BorderStrokeSelectionClone.Background = Brushes.Transparent;
                updateBorderStrokeSelectionControlLocation();
                UpdateSelectionDisplay();
                return;
            }

            // 检查是否有图片元素被选中（通过InkCanvas的选中元素）
            var selectedElements = inkCanvas.GetSelectedElements();
            bool hasImageElement = selectedElements.Any(element => element is Image);

            // 如果有图片元素被选中，不显示选择框
            if (hasImageElement)
            {
                GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
                HideSelectionDisplay();
                return;
            }

            // 检查是否有图片元素被选中（通过currentSelectedElement）
            if (currentSelectedElement != null && currentSelectedElement is Image)
            {
                GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
                HideSelectionDisplay();
                return;
            }

            // 没有选中任何内容，隐藏选择框
            GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
            HideSelectionDisplay();
        }



        private void updateBorderStrokeSelectionControlLocation()
        {
            var borderLeft = (inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Right -
                              BorderStrokeSelectionControlWidth) / 2;
            var borderTop = inkCanvas.GetSelectionBounds().Bottom + 10; // 在墨迹下方10像素处显示
            if (borderLeft < 0) borderLeft = 0;
            if (borderTop < 0) borderTop = 0;
            if (Width - borderLeft < BorderStrokeSelectionControlWidth || double.IsNaN(borderLeft))
                borderLeft = Width - BorderStrokeSelectionControlWidth;
            if (Height - borderTop < BorderStrokeSelectionControlHeight || double.IsNaN(borderTop))
                borderTop = Height - BorderStrokeSelectionControlHeight;

            // 确保墨迹选中栏始终显示在墨迹下方
            // 如果选中栏会超出屏幕底部，则显示在墨迹上方
            if (borderTop + BorderStrokeSelectionControlHeight > Height)
            {
                borderTop = inkCanvas.GetSelectionBounds().Top - BorderStrokeSelectionControlHeight - 10;
                if (borderTop < 0) borderTop = 10; // 如果上方也没有空间，则显示在顶部
            }

            BorderStrokeSelectionControl.Margin = new Thickness(borderLeft, borderTop, 0, 0);
        }

        private void GridInkCanvasSelectionCover_ManipulationStarting(object sender, ManipulationStartingEventArgs e)
        {
            e.Mode = ManipulationModes.All;
        }

        private void GridInkCanvasSelectionCover_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
        {
            if (StrokeManipulationHistory?.Count > 0)
            {
                timeMachine.CommitStrokeManipulationHistory(StrokeManipulationHistory);
                foreach (var item in StrokeManipulationHistory)
                {
                    StrokeInitialHistory[item.Key] = item.Value.Item2;
                }

                StrokeManipulationHistory = null;
            }

            if (DrawingAttributesHistory.Count > 0)
            {
                timeMachine.CommitStrokeDrawingAttributesHistory(DrawingAttributesHistory);
                DrawingAttributesHistory = new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
                foreach (var item in DrawingAttributesHistoryFlag)
                {
                    item.Value.Clear();
                }
            }
        }

        private void GridInkCanvasSelectionCover_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
        {
            try
            {
                if (dec.Count >= 1)
                {
                    bool disableScale = dec.Count >= 3;
                    var md = e.DeltaManipulation;
                    var trans = md.Translation; // 获得位移矢量
                    var rotate = md.Rotation; // 获得旋转角度
                    var scale = md.Scale; // 获得缩放倍数

                    var m = new Matrix();

                    // Find center of element and then transform to get current location of center
                    var fe = e.Source as FrameworkElement;
                    var center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2);
                    center = new Point(inkCanvas.GetSelectionBounds().Left + inkCanvas.GetSelectionBounds().Width / 2,
                        inkCanvas.GetSelectionBounds().Top + inkCanvas.GetSelectionBounds().Height / 2);
                    center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点

                    // Update matrix to reflect translation/rotation
                    m.Translate(trans.X, trans.Y); // 移动
                    if (!disableScale)
                        m.ScaleAt(scale.X, scale.Y, center.X, center.Y); // 缩放

                    var strokes = inkCanvas.GetSelectedStrokes();
                    if (StrokesSelectionClone.Count != 0)
                        strokes = StrokesSelectionClone;
                    else if (Settings.Gesture.IsEnableTwoFingerRotationOnSelection)
                        m.RotateAt(rotate, center.X, center.Y); // 旋转

                    // 应用变换到选中的墨迹
                    foreach (var stroke in strokes)
                    {
                        stroke.Transform(m, false);
                    }

                    updateBorderStrokeSelectionControlLocation();
                }
            }
            catch (Exception ex)
            {
                LogHelper.WriteLogToFile($"墨迹ManipulationDelta错误: {ex.Message}", LogHelper.LogType.Error);
            }
        }

        private void GridInkCanvasSelectionCover_TouchDown(object sender, TouchEventArgs e)
        {
        }

        private void GridInkCanvasSelectionCover_TouchUp(object sender, TouchEventArgs e)
        {
        }

        private void GridInkCanvasSelectionCover_TouchMove(object sender, TouchEventArgs e)
        {
            // 处理触摸移动事件 - 用于拖动选中的墨迹
            if (inkCanvas.GetSelectedStrokes().Count > 0 && dec.Count == 1)
            {
                var currentTouchPoint = e.GetTouchPoint(inkCanvas).Position;

                // 检查是否有有效的起始触摸点
                if (lastTouchPointOnGridInkCanvasCover != new Point(0, 0))
                {
                    var delta = currentTouchPoint - lastTouchPointOnGridInkCanvasCover;

                    // 只有当移动距离足够大时才进行拖动（避免微小移动造成的抖动）
                    if (Math.Abs(delta.X) > 1 || Math.Abs(delta.Y) > 1)
                    {
                        // 创建变换矩阵
                        var matrix = new Matrix();
                        matrix.Translate(delta.X, delta.Y);

                        // 对选中的墨迹应用变换
                        var selectedStrokes = inkCanvas.GetSelectedStrokes();
                        foreach (var stroke in selectedStrokes)
                        {
                            stroke.Transform(matrix, false);
                        }

                        // 更新选中栏位置
                        updateBorderStrokeSelectionControlLocation();

                        // 更新最后触摸点
                        lastTouchPointOnGridInkCanvasCover = currentTouchPoint;
                    }
                }
            }
        }

        private void GridInkCanvasSelectionCover_PreviewTouchMove(object sender, TouchEventArgs e)
        {
            // 预览触摸移动事件 - 用于更精确的触摸处理
            if (inkCanvas.GetSelectedStrokes().Count > 0 && dec.Count == 1)
            {
                var currentTouchPoint = e.GetTouchPoint(inkCanvas).Position;

                // 检查是否有有效的起始触摸点
                if (lastTouchPointOnGridInkCanvasCover != new Point(0, 0))
                {
                    var delta = currentTouchPoint - lastTouchPointOnGridInkCanvasCover;

                    // 只有当移动距离足够大时才进行拖动（避免微小移动造成的抖动）
                    if (Math.Abs(delta.X) > 1 || Math.Abs(delta.Y) > 1)
                    {
                        // 创建变换矩阵
                        var matrix = new Matrix();
                        matrix.Translate(delta.X, delta.Y);

                        // 对选中的墨迹应用变换
                        var selectedStrokes = inkCanvas.GetSelectedStrokes();
                        foreach (var stroke in selectedStrokes)
                        {
                            stroke.Transform(matrix, false);
                        }

                        // 更新选中栏位置
                        updateBorderStrokeSelectionControlLocation();

                        // 更新最后触摸点
                        lastTouchPointOnGridInkCanvasCover = currentTouchPoint;
                    }
                }
            }
        }

        private Point lastTouchPointOnGridInkCanvasCover = new Point(0, 0);

        private void GridInkCanvasSelectionCover_PreviewTouchDown(object sender, TouchEventArgs e)
        {
            dec.Add(e.TouchDevice.Id);
            //设备1个的时候，记录中心点
            if (dec.Count == 1)
            {
                var touchPoint = e.GetTouchPoint(null);
                centerPoint = touchPoint.Position;
                lastTouchPointOnGridInkCanvasCover = e.GetTouchPoint(inkCanvas).Position;

                // 检查是否有选中的墨迹
                if (inkCanvas.GetSelectedStrokes().Count > 0)
                {
                    // 获取触摸点位置
                    var touchPosition = e.GetTouchPoint(inkCanvas).Position;
                    var selectionBounds = inkCanvas.GetSelectionBounds();

                    // 检查触摸位置是否在选择框边界内
                    if (touchPosition.X >= selectionBounds.Left &&
                        touchPosition.X <= selectionBounds.Right &&
                        touchPosition.Y >= selectionBounds.Top &&
                        touchPosition.Y <= selectionBounds.Bottom)
                    {
                        // 只有在选择框边界内才允许拖动
                        // 触摸拖动状态已通过TouchMove事件处理
                    }
                    else
                    {
                        // 触摸在选择框外，取消选择
                        inkCanvas.Select(new StrokeCollection());
                        GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
                        return;
                    }
                }


                SetCurrentToolMode(InkCanvasEditingMode.Select);
                inkCanvas.Select(new StrokeCollection());
            }
        }

        private void GridInkCanvasSelectionCover_PreviewTouchUp(object sender, TouchEventArgs e)
        {
            dec.Remove(e.TouchDevice.Id);
            if (dec.Count >= 1) return;

            // 重置触摸状态
            lastTouchPointOnGridInkCanvasCover = new Point(0, 0);
            isProgramChangeStrokeSelection = false;

            // 检查是否有点击（没有移动）
            var currentTouchPoint = e.GetTouchPoint(null).Position;
            if (Math.Abs(currentTouchPoint.X - centerPoint.X) < 5 && Math.Abs(currentTouchPoint.Y - centerPoint.Y) < 5)
            {
                // 点击在选择框内，保持选择状态
                if (inkCanvas.GetSelectedStrokes().Count > 0)
                {
                    var selectionBounds = inkCanvas.GetSelectionBounds();
                    if (currentTouchPoint.X >= selectionBounds.Left &&
                        currentTouchPoint.X <= selectionBounds.Right &&
                        currentTouchPoint.Y >= selectionBounds.Top &&
                        currentTouchPoint.Y <= selectionBounds.Bottom)
                    {
                        // 点击在选择框内，保持选择
                        GridInkCanvasSelectionCover.Visibility = Visibility.Visible;
                        StrokesSelectionClone = new StrokeCollection();
                        return;
                    }
                }

                // 点击在选择框外，取消选择
                inkCanvas.Select(new StrokeCollection());
                StrokesSelectionClone = new StrokeCollection();
            }
            else if (inkCanvas.GetSelectedStrokes().Count == 0)
            {
                GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
                StrokesSelectionClone = new StrokeCollection();
            }
            else
            {
                GridInkCanvasSelectionCover.Visibility = Visibility.Visible;
                StrokesSelectionClone = new StrokeCollection();
            }

        }

        private void LassoSelect_Click(object sender, RoutedEventArgs e)
        {
            forceEraser = false;
            forcePointEraser = false;
            drawingShapeMode = 0;
            // 使用集中化的工具模式切换方法
            SetCurrentToolMode(InkCanvasEditingMode.Select);
            SetCursorBasedOnEditingMode(inkCanvas);
        }

        private void BtnLassoSelect_Click(object sender, RoutedEventArgs e)
        {
            forceEraser = false;
            forcePointEraser = false;
            drawingShapeMode = 0;
            // 使用集中化的工具模式切换方法
            SetCurrentToolMode(InkCanvasEditingMode.Select);
            inkCanvas.IsManipulationEnabled = true;
            SetCursorBasedOnEditingMode(inkCanvas);
        }

        #region UIElement Selection and Resize

        private Rect GetUIElementBounds(UIElement element)
        {
            if (element is FrameworkElement fe)
            {
                var left = InkCanvas.GetLeft(element);
                var top = InkCanvas.GetTop(element);

                if (double.IsNaN(left)) left = 0;
                if (double.IsNaN(top)) top = 0;

                var width = fe.ActualWidth > 0 ? fe.ActualWidth : fe.Width;
                var height = fe.ActualHeight > 0 ? fe.ActualHeight : fe.Height;

                // 检查是否有RenderTransform
                if (fe.RenderTransform != null && fe.RenderTransform != Transform.Identity)
                {
                    try
                    {
                        // 如果有变换，使用变换后的边界
                        var transform = element.TransformToAncestor(inkCanvas);
                        var elementBounds = new Rect(0, 0, width, height);
                        var transformedBounds = transform.TransformBounds(elementBounds);
                        return transformedBounds;
                    }
                    catch
                    {
                        // 变换失败时回退到简单计算
                        return new Rect(left, top, width, height);
                    }
                }

                // 没有变换时直接使用位置和大小
                return new Rect(left, top, width, height);
            }

            return new Rect(0, 0, 0, 0);
        }

        #endregion

        #region Selection Display and Resize Handles

        private void UpdateSelectionDisplay()
        {
            if (inkCanvas.GetSelectedStrokes().Count == 0)
            {
                HideSelectionDisplay();
                return;
            }

            var selectionBounds = inkCanvas.GetSelectionBounds();

            // 更新选择框
            SelectionRectangle.Visibility = Visibility.Visible;
            SelectionRectangle.Margin = new Thickness(selectionBounds.Left, selectionBounds.Top, 0, 0);
            SelectionRectangle.Width = selectionBounds.Width;
            SelectionRectangle.Height = selectionBounds.Height;

            // 更新选择点位置
            UpdateSelectionHandles(selectionBounds);
            SelectionHandlesCanvas.Visibility = Visibility.Visible;
        }

        private void HideSelectionDisplay()
        {
            SelectionRectangle.Visibility = Visibility.Collapsed;
            SelectionHandlesCanvas.Visibility = Visibility.Collapsed;
        }

        private void UpdateSelectionHandles(Rect bounds)
        {
            // 四个角选择点
            TopLeftHandle.Margin = new Thickness(bounds.Left - 4, bounds.Top - 4, 0, 0);
            TopRightHandle.Margin = new Thickness(bounds.Right - 4, bounds.Top - 4, 0, 0);
            BottomLeftHandle.Margin = new Thickness(bounds.Left - 4, bounds.Bottom - 4, 0, 0);
            BottomRightHandle.Margin = new Thickness(bounds.Right - 4, bounds.Bottom - 4, 0, 0);

            // 四个边选择点
            TopHandle.Margin = new Thickness(bounds.Left + bounds.Width / 2 - 4, bounds.Top - 4, 0, 0);
            BottomHandle.Margin = new Thickness(bounds.Left + bounds.Width / 2 - 4, bounds.Bottom - 4, 0, 0);
            LeftHandle.Margin = new Thickness(bounds.Left - 4, bounds.Top + bounds.Height / 2 - 4, 0, 0);
            RightHandle.Margin = new Thickness(bounds.Right - 4, bounds.Top + bounds.Height / 2 - 4, 0, 0);
        }

        private void SelectionHandle_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (sender is Rectangle handle)
            {
                isResizing = true;
                currentResizeHandle = handle.Name;
                resizeStartPoint = e.GetPosition(inkCanvas);
                originalSelectionBounds = inkCanvas.GetSelectionBounds();
                handle.CaptureMouse();
                e.Handled = true;
            }
        }

        private void SelectionHandle_MouseMove(object sender, MouseEventArgs e)
        {
            if (!isResizing || !(sender is Rectangle handle)) return;

            var currentPoint = e.GetPosition(inkCanvas);
            var delta = new Point(currentPoint.X - resizeStartPoint.X, currentPoint.Y - resizeStartPoint.Y);

            var newBounds = CalculateNewBounds(originalSelectionBounds, delta, currentResizeHandle);

            // 应用新的边界到选中的墨迹
            ApplyBoundsToStrokes(newBounds);

            // 更新选择框显示
            UpdateSelectionDisplay();
        }

        private void SelectionHandle_MouseUp(object sender, MouseButtonEventArgs e)
        {
            if (sender is Rectangle handle)
            {
                isResizing = false;
                currentResizeHandle = "";
                handle.ReleaseMouseCapture();
                e.Handled = true;
            }
        }

        private Rect CalculateNewBounds(Rect originalBounds, Point delta, string handleName)
        {
            var newBounds = originalBounds;
            double newWidth = originalBounds.Width;
            double newHeight = originalBounds.Height;
            double newX = originalBounds.X;
            double newY = originalBounds.Y;

            switch (handleName)
            {
                case "TopLeftHandle":
                    newX = originalBounds.X + delta.X;
                    newY = originalBounds.Y + delta.Y;
                    newWidth = originalBounds.Width - delta.X;
                    newHeight = originalBounds.Height - delta.Y;
                    break;
                case "TopRightHandle":
                    newY = originalBounds.Y + delta.Y;
                    newWidth = originalBounds.Width + delta.X;
                    newHeight = originalBounds.Height - delta.Y;
                    break;
                case "BottomLeftHandle":
                    newX = originalBounds.X + delta.X;
                    newWidth = originalBounds.Width - delta.X;
                    newHeight = originalBounds.Height + delta.Y;
                    break;
                case "BottomRightHandle":
                    newWidth = originalBounds.Width + delta.X;
                    newHeight = originalBounds.Height + delta.Y;
                    break;
                case "TopHandle":
                    newY = originalBounds.Y + delta.Y;
                    newHeight = originalBounds.Height - delta.Y;
                    break;
                case "BottomHandle":
                    newHeight = originalBounds.Height + delta.Y;
                    break;
                case "LeftHandle":
                    newX = originalBounds.X + delta.X;
                    newWidth = originalBounds.Width - delta.X;
                    break;
                case "RightHandle":
                    newWidth = originalBounds.Width + delta.X;
                    break;
            }

            // 确保最小尺寸和正值
            if (newWidth < 10) newWidth = 10;
            if (newHeight < 10) newHeight = 10;

            // 创建新的Rect，确保所有值都是有效的
            newBounds = new Rect(newX, newY, newWidth, newHeight);

            return newBounds;
        }

        private void ApplyBoundsToStrokes(Rect newBounds)
        {
            var selectedStrokes = inkCanvas.GetSelectedStrokes();
            if (selectedStrokes.Count == 0) return;

            var originalBounds = inkCanvas.GetSelectionBounds();

            // 计算缩放比例
            var scaleX = newBounds.Width / originalBounds.Width;
            var scaleY = newBounds.Height / originalBounds.Height;

            // 计算平移量
            var translateX = newBounds.X - originalBounds.X;
            var translateY = newBounds.Y - originalBounds.Y;

            // 创建变换矩阵
            var matrix = new Matrix();
            matrix.Translate(translateX, translateY);
            matrix.ScaleAt(scaleX, scaleY, originalBounds.X + originalBounds.Width / 2, originalBounds.Y + originalBounds.Height / 2);

            // 应用变换到选中的墨迹
            foreach (var stroke in selectedStrokes)
            {
                stroke.Transform(matrix, false);
            }
        }

        #endregion
    }
}