563 lines
23 KiB
C#
563 lines
23 KiB
C#
using Ink_Canvas.Helpers;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Ink;
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using System.Windows.Input;
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using System.Windows.Media;
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namespace Ink_Canvas
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{
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public partial class MainWindow : Window
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{
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/// <summary>
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/// 提交原因枚举，用于标识不同类型的操作
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/// </summary>
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private enum CommitReason
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{
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/// <summary>用户输入操作</summary>
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UserInput,
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/// <summary>代码输入操作</summary>
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CodeInput,
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/// <summary>形状绘制操作</summary>
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ShapeDrawing,
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/// <summary>形状识别操作</summary>
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ShapeRecognition,
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/// <summary>清除画布操作</summary>
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ClearingCanvas,
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/// <summary>笔画操作操作</summary>
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Manipulation
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}
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/// <summary>
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/// 当前提交类型
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/// </summary>
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private CommitReason _currentCommitType = CommitReason.UserInput;
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/// <summary>
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/// 是否为点橡皮擦模式
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/// </summary>
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private bool IsEraseByPoint => inkCanvas.EditingMode == InkCanvasEditingMode.EraseByPoint;
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/// <summary>
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/// 替换的笔画集合
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/// </summary>
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private StrokeCollection ReplacedStroke;
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/// <summary>
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/// 添加的笔画集合
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/// </summary>
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private StrokeCollection AddedStroke;
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/// <summary>
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/// 长方体笔画集合
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/// </summary>
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private StrokeCollection CuboidStrokeCollection;
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/// <summary>
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/// 笔画操作历史记录
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/// </summary>
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private Dictionary<Stroke, Tuple<StylusPointCollection, StylusPointCollection>> StrokeManipulationHistory;
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/// <summary>
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/// 笔画初始状态历史记录
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/// </summary>
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private Dictionary<Stroke, StylusPointCollection> StrokeInitialHistory =
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new Dictionary<Stroke, StylusPointCollection>();
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/// <summary>
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/// 绘制属性历史记录
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/// </summary>
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private Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>> DrawingAttributesHistory =
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new Dictionary<Stroke, Tuple<DrawingAttributes, DrawingAttributes>>();
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/// <summary>
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/// 绘制属性历史记录标志
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/// </summary>
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private Dictionary<Guid, List<Stroke>> DrawingAttributesHistoryFlag = new Dictionary<Guid, List<Stroke>> {
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{ DrawingAttributeIds.Color, new List<Stroke>() },
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{ DrawingAttributeIds.DrawingFlags, new List<Stroke>() },
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{ DrawingAttributeIds.IsHighlighter, new List<Stroke>() },
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{ DrawingAttributeIds.StylusHeight, new List<Stroke>() },
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{ DrawingAttributeIds.StylusTip, new List<Stroke>() },
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{ DrawingAttributeIds.StylusTipTransform, new List<Stroke>() },
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{ DrawingAttributeIds.StylusWidth, new List<Stroke>() }
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};
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/// <summary>
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/// 时间机器实例，用于撤销/重做操作
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/// </summary>
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private TimeMachine timeMachine = new TimeMachine();
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/// <summary>
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/// 将历史记录应用到画布
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/// </summary>
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/// <param name="item">时间机器历史记录项</param>
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/// <param name="applyCanvas">要应用的画布，默认为null（使用主画布）</param>
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/// <remarks>
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/// 根据历史记录类型执行不同的操作：
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/// 1. UserInput: 处理用户输入的笔画
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/// 2. ShapeRecognition: 处理形状识别的笔画
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/// 3. Manipulation: 处理笔画操作
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/// 4. DrawingAttributes: 处理绘制属性变化
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/// 5. Clear: 处理清除画布操作
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/// 6. ElementInsert: 处理元素插入操作
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/// </remarks>
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/// <param name="elementsRemovedInThisPage"></param>
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private void ApplyHistoryToCanvas(TimeMachineHistory item, InkCanvas applyCanvas = null, HashSet<UIElement> elementsRemovedInThisPage = null)
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{
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_currentCommitType = CommitReason.CodeInput;
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var canvas = inkCanvas;
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if (applyCanvas != null && applyCanvas is InkCanvas)
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{
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canvas = applyCanvas;
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}
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if (item.CommitType == TimeMachineHistoryType.UserInput)
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{
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if (!item.StrokeHasBeenCleared)
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{
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foreach (var strokes in item.CurrentStroke)
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if (!canvas.Strokes.Contains(strokes))
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canvas.Strokes.Add(strokes);
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}
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else
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{
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foreach (var strokes in item.CurrentStroke)
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if (canvas.Strokes.Contains(strokes))
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canvas.Strokes.Remove(strokes);
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}
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}
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else if (item.CommitType == TimeMachineHistoryType.ShapeRecognition)
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{
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if (item.StrokeHasBeenCleared)
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{
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foreach (var strokes in item.CurrentStroke)
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if (canvas.Strokes.Contains(strokes))
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canvas.Strokes.Remove(strokes);
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foreach (var strokes in item.ReplacedStroke)
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if (!canvas.Strokes.Contains(strokes))
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canvas.Strokes.Add(strokes);
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}
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else
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{
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foreach (var strokes in item.CurrentStroke)
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if (!canvas.Strokes.Contains(strokes))
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canvas.Strokes.Add(strokes);
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foreach (var strokes in item.ReplacedStroke)
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if (canvas.Strokes.Contains(strokes))
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canvas.Strokes.Remove(strokes);
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}
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}
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else if (item.CommitType == TimeMachineHistoryType.Manipulation)
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{
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if (!item.StrokeHasBeenCleared)
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{
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foreach (var currentStroke in item.StylusPointDictionary)
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{
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if (canvas.Strokes.Contains(currentStroke.Key))
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{
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currentStroke.Key.StylusPoints = currentStroke.Value.Item2;
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}
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}
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}
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else
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{
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foreach (var currentStroke in item.StylusPointDictionary)
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{
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if (canvas.Strokes.Contains(currentStroke.Key))
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{
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currentStroke.Key.StylusPoints = currentStroke.Value.Item1;
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}
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}
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}
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}
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else if (item.CommitType == TimeMachineHistoryType.DrawingAttributes)
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{
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if (!item.StrokeHasBeenCleared)
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{
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foreach (var currentStroke in item.DrawingAttributes)
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{
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if (canvas.Strokes.Contains(currentStroke.Key))
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{
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currentStroke.Key.DrawingAttributes = currentStroke.Value.Item2;
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}
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}
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}
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else
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{
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foreach (var currentStroke in item.DrawingAttributes)
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{
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if (canvas.Strokes.Contains(currentStroke.Key))
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{
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currentStroke.Key.DrawingAttributes = currentStroke.Value.Item1;
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}
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}
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}
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}
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else if (item.CommitType == TimeMachineHistoryType.Clear)
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{
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if (!item.StrokeHasBeenCleared)
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{
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if (item.CurrentStroke != null)
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foreach (var currentStroke in item.CurrentStroke)
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if (!canvas.Strokes.Contains(currentStroke))
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canvas.Strokes.Add(currentStroke);
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if (item.ReplacedStroke != null)
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foreach (var replacedStroke in item.ReplacedStroke)
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if (canvas.Strokes.Contains(replacedStroke))
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canvas.Strokes.Remove(replacedStroke);
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}
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else
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{
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if (item.ReplacedStroke != null)
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foreach (var replacedStroke in item.ReplacedStroke)
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if (!canvas.Strokes.Contains(replacedStroke))
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canvas.Strokes.Add(replacedStroke);
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if (item.CurrentStroke != null)
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foreach (var currentStroke in item.CurrentStroke)
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if (canvas.Strokes.Contains(currentStroke))
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canvas.Strokes.Remove(currentStroke);
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}
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}
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else if (item.CommitType == TimeMachineHistoryType.ElementInsert)
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{
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var targetCanvas = canvas ?? inkCanvas;
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if (item.StrokeHasBeenCleared)
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{
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if (elementsRemovedInThisPage != null)
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return;
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if (item.InsertedElement != null && targetCanvas.Children.Contains(item.InsertedElement))
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targetCanvas.Children.Remove(item.InsertedElement);
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}
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else
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{
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if (elementsRemovedInThisPage != null && item.InsertedElement != null && elementsRemovedInThisPage.Contains(item.InsertedElement))
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return;
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if (item.InsertedElement != null && !targetCanvas.Children.Contains(item.InsertedElement))
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{
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targetCanvas.Children.Add(item.InsertedElement);
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// 重新绑定事件处理器（仅对主画布）
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if (targetCanvas == inkCanvas)
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{
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if (item.InsertedElement is Image img)
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{
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// 检查图片是否有位置信息，如果没有则应用居中
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double left = InkCanvas.GetLeft(img);
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double top = InkCanvas.GetTop(img);
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if (double.IsNaN(left) || double.IsNaN(top))
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{
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// 图片没有位置信息，应用居中
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CenterAndScaleElement(img);
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}
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// 重新绑定事件处理器
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BindElementEvents(img);
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}
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else if (item.InsertedElement is MediaElement media)
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{
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// 检查媒体元素是否有位置信息，如果没有则应用居中
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double left = InkCanvas.GetLeft(media);
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double top = InkCanvas.GetTop(media);
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if (double.IsNaN(left) || double.IsNaN(top))
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{
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// 媒体元素没有位置信息，应用居中
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CenterAndScaleElement(media);
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}
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// 重新绑定事件处理器
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BindElementEvents(media);
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}
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}
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}
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}
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}
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_currentCommitType = CommitReason.UserInput;
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}
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/// <summary>
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/// 将历史记录应用到新的笔画集合
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/// </summary>
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/// <param name="items">时间机器历史记录数组</param>
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/// <returns>返回应用历史记录后的笔画集合</returns>
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/// <remarks>
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/// 创建一个临时画布，应用历史记录，然后返回画布中的笔画集合
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/// 只处理笔画历史，不处理图片元素历史
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/// </remarks>
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private StrokeCollection ApplyHistoriesToNewStrokeCollection(TimeMachineHistory[] items)
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{
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InkCanvas fakeInkCanv = new InkCanvas
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{
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Width = inkCanvas.ActualWidth,
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Height = inkCanvas.ActualHeight,
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EditingMode = InkCanvasEditingMode.None,
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};
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if (items != null && items.Length > 0)
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{
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foreach (var timeMachineHistory in items)
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{
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// 只处理笔画历史，不处理图片元素历史
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// 因为页面预览只需要显示笔画，图片元素会影响主画布
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if (timeMachineHistory.CommitType != TimeMachineHistoryType.ElementInsert)
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{
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ApplyHistoryToCanvas(timeMachineHistory, fakeInkCanv);
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}
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}
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}
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return fakeInkCanv.Strokes;
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}
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/// <summary>
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/// 获取页面的所有图片元素
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/// </summary>
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/// <param name="items">时间机器历史记录数组</param>
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/// <returns>返回页面的图片元素列表</returns>
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/// <remarks>
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/// 遍历历史记录，收集所有插入的图片元素
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/// </remarks>
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private List<UIElement> GetPageImageElements(TimeMachineHistory[] items)
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{
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var imageElements = new List<UIElement>();
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if (items != null && items.Length > 0)
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{
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foreach (var timeMachineHistory in items)
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{
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if (timeMachineHistory.CommitType == TimeMachineHistoryType.ElementInsert &&
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timeMachineHistory.InsertedElement != null &&
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!timeMachineHistory.StrokeHasBeenCleared)
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{
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imageElements.Add(timeMachineHistory.InsertedElement);
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}
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}
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}
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return imageElements;
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}
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/// <summary>
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/// 处理撤销状态变化事件
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/// </summary>
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/// <param name="status">撤销状态</param>
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/// <remarks>
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/// 根据撤销状态更新撤销按钮的可见性和启用状态
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/// </remarks>
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private void TimeMachine_OnUndoStateChanged(bool status)
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{
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var result = status ? Visibility.Visible : Visibility.Collapsed;
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BtnUndo.Visibility = result;
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BtnUndo.IsEnabled = status;
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}
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/// <summary>
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/// 处理重做状态变化事件
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/// </summary>
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/// <param name="status">重做状态</param>
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/// <remarks>
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/// 根据重做状态更新重做按钮的可见性和启用状态
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/// </remarks>
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private void TimeMachine_OnRedoStateChanged(bool status)
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{
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var result = status ? Visibility.Visible : Visibility.Collapsed;
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BtnRedo.Visibility = result;
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BtnRedo.IsEnabled = status;
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}
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/// <summary>
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/// 处理笔画集合变化事件
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/// </summary>
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/// <param name="sender">事件发送者</param>
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/// <param name="e">笔画集合变化事件参数</param>
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/// <remarks>
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/// 当笔画集合发生变化时：
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/// 1. 书写时自动隐藏二级菜单
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/// 2. 处理移除的笔画：移除事件处理器，从历史记录中移除
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/// 3. 处理添加的笔画：添加事件处理器，记录初始状态
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/// 4. 根据不同的提交类型处理历史记录
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/// </remarks>
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private void StrokesOnStrokesChanged(object sender, StrokeCollectionChangedEventArgs e)
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{
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if (!isHidingSubPanelsWhenInking)
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{
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isHidingSubPanelsWhenInking = true;
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HideSubPanels(); // 书写时自动隐藏二级菜单
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}
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foreach (var stroke in e?.Removed)
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{
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stroke.StylusPointsChanged -= Stroke_StylusPointsChanged;
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stroke.StylusPointsReplaced -= Stroke_StylusPointsReplaced;
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stroke.DrawingAttributesChanged -= Stroke_DrawingAttributesChanged;
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StrokeInitialHistory.Remove(stroke);
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}
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foreach (var stroke in e?.Added)
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{
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stroke.StylusPointsChanged += Stroke_StylusPointsChanged;
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stroke.StylusPointsReplaced += Stroke_StylusPointsReplaced;
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stroke.DrawingAttributesChanged += Stroke_DrawingAttributesChanged;
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StrokeInitialHistory[stroke] = stroke.StylusPoints.Clone();
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}
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if (_currentCommitType == CommitReason.CodeInput || _currentCommitType == CommitReason.ShapeDrawing) return;
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if ((e.Added.Count != 0 || e.Removed.Count != 0) && IsEraseByPoint)
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{
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if (AddedStroke == null) AddedStroke = new StrokeCollection();
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if (ReplacedStroke == null) ReplacedStroke = new StrokeCollection();
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AddedStroke.Add(e.Added);
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ReplacedStroke.Add(e.Removed);
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return;
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}
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if (e.Added.Count != 0)
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{
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if (_currentCommitType == CommitReason.ShapeRecognition)
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{
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timeMachine.CommitStrokeShapeHistory(ReplacedStroke, e.Added);
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ReplacedStroke = null;
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return;
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}
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timeMachine.CommitStrokeUserInputHistory(e.Added);
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return;
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}
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if (e.Removed.Count != 0)
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{
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if (_currentCommitType == CommitReason.ShapeRecognition)
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{
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ReplacedStroke = e.Removed;
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}
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else if (!IsEraseByPoint || _currentCommitType == CommitReason.ClearingCanvas)
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{
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timeMachine.CommitStrokeEraseHistory(e.Removed);
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}
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}
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}
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/// <summary>
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/// 处理笔画绘制属性变化事件
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/// </summary>
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/// <param name="sender">事件发送者</param>
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/// <param name="e">属性数据变化事件参数</param>
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/// <remarks>
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/// 当笔画的绘制属性发生变化时，记录变化历史
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/// </remarks>
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private void Stroke_DrawingAttributesChanged(object sender, PropertyDataChangedEventArgs e)
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{
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var key = sender as Stroke;
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var currentValue = key.DrawingAttributes.Clone();
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DrawingAttributesHistory.TryGetValue(key, out var previousTuple);
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var previousValue = previousTuple?.Item1 ?? currentValue.Clone();
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var needUpdateValue = !DrawingAttributesHistoryFlag[e.PropertyGuid].Contains(key);
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if (needUpdateValue)
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{
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DrawingAttributesHistoryFlag[e.PropertyGuid].Add(key);
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Debug.Write(e.PreviousValue.ToString());
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}
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if (e.PropertyGuid == DrawingAttributeIds.Color && needUpdateValue)
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{
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previousValue.Color = (Color)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.IsHighlighter && needUpdateValue)
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{
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previousValue.IsHighlighter = (bool)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.StylusHeight && needUpdateValue)
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{
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previousValue.Height = (double)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.StylusWidth && needUpdateValue)
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{
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previousValue.Width = (double)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.StylusTip && needUpdateValue)
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{
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previousValue.StylusTip = (StylusTip)e.PreviousValue;
|
|
}
|
|
|
|
if (e.PropertyGuid == DrawingAttributeIds.StylusTipTransform && needUpdateValue)
|
|
{
|
|
previousValue.StylusTipTransform = (Matrix)e.PreviousValue;
|
|
}
|
|
|
|
if (e.PropertyGuid == DrawingAttributeIds.DrawingFlags && needUpdateValue)
|
|
{
|
|
previousValue.IgnorePressure = (bool)e.PreviousValue;
|
|
}
|
|
|
|
DrawingAttributesHistory[key] =
|
|
new Tuple<DrawingAttributes, DrawingAttributes>(previousValue, currentValue);
|
|
}
|
|
|
|
/// <summary>
|
|
/// 处理笔画触笔点替换事件
|
|
/// </summary>
|
|
/// <param name="sender">事件发送者</param>
|
|
/// <param name="e">触笔点替换事件参数</param>
|
|
/// <remarks>
|
|
/// 当笔画的触笔点被替换时，更新初始状态历史
|
|
/// </remarks>
|
|
private void Stroke_StylusPointsReplaced(object sender, StylusPointsReplacedEventArgs e)
|
|
{
|
|
StrokeInitialHistory[sender as Stroke] = e.NewStylusPoints.Clone();
|
|
}
|
|
|
|
/// <summary>
|
|
/// 处理笔画触笔点变化事件
|
|
/// </summary>
|
|
/// <param name="sender">事件发送者</param>
|
|
/// <param name="e">事件参数</param>
|
|
/// <remarks>
|
|
/// 当笔画的触笔点发生变化时：
|
|
/// 1. 获取选中的笔画数量
|
|
/// 2. 初始化笔画操作历史记录
|
|
/// 3. 记录笔画的初始状态和当前状态
|
|
/// 4. 当所有选中的笔画都已处理时，提交操作历史
|
|
/// </remarks>
|
|
private void Stroke_StylusPointsChanged(object sender, EventArgs e)
|
|
{
|
|
var selectedStrokes = inkCanvas.GetSelectedStrokes();
|
|
var count = selectedStrokes.Count;
|
|
if (count == 0) count = inkCanvas.Strokes.Count;
|
|
if (StrokeManipulationHistory == null)
|
|
{
|
|
StrokeManipulationHistory =
|
|
new Dictionary<Stroke, Tuple<StylusPointCollection, StylusPointCollection>>();
|
|
}
|
|
|
|
StrokeManipulationHistory[sender as Stroke] =
|
|
new Tuple<StylusPointCollection, StylusPointCollection>(StrokeInitialHistory[sender as Stroke],
|
|
(sender as Stroke).StylusPoints.Clone());
|
|
if ((StrokeManipulationHistory.Count == count || sender == null) && dec.Count == 0)
|
|
{
|
|
timeMachine.CommitStrokeManipulationHistory(StrokeManipulationHistory);
|
|
foreach (var item in StrokeManipulationHistory)
|
|
{
|
|
StrokeInitialHistory[item.Key] = item.Value.Item2;
|
|
}
|
|
|
|
StrokeManipulationHistory = null;
|
|
}
|
|
}
|
|
}
|
|
} |