590 lines
24 KiB
C#
590 lines
24 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.Threading.Tasks;
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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.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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/// 存储每个白板页面的墨迹集合
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/// </summary>
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private StrokeCollection[] strokeCollections = new StrokeCollection[101];
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/// <summary>
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/// 存储每个白板页面的最后操作模式是否为重做
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/// </summary>
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private bool[] whiteboadLastModeIsRedo = new bool[101];
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/// <summary>
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/// 存储最后一次触摸按下时的墨迹集合
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/// </summary>
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private StrokeCollection lastTouchDownStrokeCollection = new StrokeCollection();
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/// <summary>
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/// 当前白板页面索引
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/// </summary>
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private int CurrentWhiteboardIndex = 1;
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/// <summary>
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/// 白板页面总数
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/// </summary>
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private int WhiteboardTotalCount = 1;
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/// <summary>
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/// 存储每个白板页面的时间机器历史记录
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/// </summary>
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private TimeMachineHistory[][] TimeMachineHistories = new TimeMachineHistory[101][];
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/// <summary>
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/// 存储每个白板页面的多指书写模式状态
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/// </summary>
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private bool[] savedMultiTouchModeStates = new bool[101];
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/// <summary>
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/// 将当前画布上的所有未保存的图片/媒体和墨迹提交到时间机器历史并将导出结果保存为指定页的快照。
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/// </summary>
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/// <param name="isBackupMain">为 true 时将导出结果保存到主备份槽（索引 0）；为 false 时保存到当前白板索引。</param>
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/// <remarks>
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/// - 会提交画布上缺失于历史记录的 Image/MediaElement（但跳过 Tag 等于 VideoPresenterLiveFrameTag 的 Image）和缺失的墨迹；
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/// - 导出后把结果存入 TimeMachineHistories 的相应索引，并保存当前多指书写模式到 savedMultiTouchModeStates；
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/// - 导出后会清除时间机器的临时墨迹历史以释放内存。
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/// - 此方法有副作用：修改 TimeMachineHistories、savedMultiTouchModeStates，并通过 timeMachine 的提交方法改变其内部历史状态。
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/// </remarks>
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private void SaveStrokes(bool isBackupMain = false)
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{
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// 确保画布上的所有UI元素都被保存到时间机器历史记录中
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var currentHistory = timeMachine.ExportTimeMachineHistory();
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var elementsInHistory = new HashSet<UIElement>();
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// 收集已经在历史记录中的元素
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if (currentHistory != null)
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{
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foreach (var h in currentHistory)
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{
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if (h.CommitType == TimeMachineHistoryType.ElementInsert &&
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h.InsertedElement != null &&
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!h.StrokeHasBeenCleared)
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{
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elementsInHistory.Add(h.InsertedElement);
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}
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}
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}
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// 检查画布上的所有UI元素，确保它们都在历史记录中
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var missingElements = 0;
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foreach (UIElement child in inkCanvas.Children)
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{
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if (child is Image || child is MediaElement)
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{
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if (child is Image img && img.Tag is string tag && tag == VideoPresenterLiveFrameTag)
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{
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continue;
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}
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if (!elementsInHistory.Contains(child))
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{
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timeMachine.CommitElementInsertHistory(child);
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missingElements++;
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}
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}
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}
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// 确保画布上的所有墨迹都被保存
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if (inkCanvas.Strokes.Count > 0)
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{
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// 检查是否有墨迹没有在时间机器历史记录中
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var strokesInHistory = new HashSet<Stroke>();
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if (currentHistory != null)
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{
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foreach (var h in currentHistory)
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{
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if (h.CommitType == TimeMachineHistoryType.UserInput &&
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h.CurrentStroke != null &&
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!h.StrokeHasBeenCleared)
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{
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foreach (Stroke stroke in h.CurrentStroke)
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{
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strokesInHistory.Add(stroke);
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}
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}
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}
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}
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// 收集没有在历史记录中的墨迹
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var missingStrokes = new StrokeCollection();
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foreach (Stroke stroke in inkCanvas.Strokes)
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{
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if (!strokesInHistory.Contains(stroke))
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{
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missingStrokes.Add(stroke);
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}
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}
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if (missingStrokes.Count > 0)
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{
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timeMachine.CommitStrokeUserInputHistory(missingStrokes);
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}
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}
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if (isBackupMain)
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{
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var timeMachineHistory = timeMachine.ExportTimeMachineHistory();
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TimeMachineHistories[0] = timeMachineHistory;
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// 保存多指书写模式状态
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savedMultiTouchModeStates[0] = isInMultiTouchMode;
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timeMachine.ClearStrokeHistory();
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}
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else
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{
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var timeMachineHistory = timeMachine.ExportTimeMachineHistory();
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TimeMachineHistories[CurrentWhiteboardIndex] = timeMachineHistory;
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// 保存多指书写模式状态
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savedMultiTouchModeStates[CurrentWhiteboardIndex] = isInMultiTouchMode;
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timeMachine.ClearStrokeHistory();
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}
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}
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/// <summary>
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/// 清除画布上的所有墨迹并执行内存清理
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/// </summary>
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/// <param name="isErasedByCode">是否由代码触发的清除操作</param>
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/// <remarks>
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/// - 根据参数设置当前提交类型
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/// - 清除画布上的所有墨迹
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/// - 执行轻量级内存清理
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/// - 恢复当前提交类型为用户输入
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/// </remarks>
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private void ClearStrokes(bool isErasedByCode)
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{
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_currentCommitType = CommitReason.ClearingCanvas;
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if (isErasedByCode) _currentCommitType = CommitReason.CodeInput;
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inkCanvas.Strokes.Clear();
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// 执行内存清理
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PerformLightweightMemoryCleanup();
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_currentCommitType = CommitReason.UserInput;
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}
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/// <summary>
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/// 执行内存清理
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/// </summary>
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private void PerformLightweightMemoryCleanup()
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{
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Task.Run(() =>
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{
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GC.Collect();
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});
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}
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/// <summary>
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/// 恢复指定白板页面的墨迹和元素信息
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/// </summary>
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/// <param name="isBackupMain">是否恢复主备份页面</param>
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/// <remarks>
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/// - 隐藏图片选择工具栏
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/// - 清空当前画布的墨迹和所有内容
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/// - 从时间机器历史记录中恢复页面内容
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/// - 恢复多指书写模式状态
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/// - 包含异常处理
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/// </remarks>
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private void RestoreStrokes(bool isBackupMain = false)
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{
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try
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{
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// 隐藏图片选择工具栏
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if (currentSelectedElement != null)
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{
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// 保存当前编辑模式
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var previousEditingMode = inkCanvas.EditingMode;
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UnselectElement(currentSelectedElement);
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// 恢复编辑模式
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inkCanvas.EditingMode = previousEditingMode;
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currentSelectedElement = null;
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}
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var targetIndex = isBackupMain ? 0 : CurrentWhiteboardIndex;
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// 先清空当前画布的墨迹
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inkCanvas.Strokes.Clear();
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// 清空当前画布的所有内容（墨迹和图片）
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// 这里必须清除图片，因为页面切换时需要完全重置画布状态
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inkCanvas.Children.Clear();
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// 如果历史记录为空，直接返回（新页面或空页面）
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if (TimeMachineHistories[targetIndex] == null)
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{
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timeMachine.ClearStrokeHistory();
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return;
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}
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if (isBackupMain)
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{
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timeMachine.ImportTimeMachineHistory(TimeMachineHistories[0]);
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foreach (var item in TimeMachineHistories[0]) ApplyHistoryToCanvas(item);
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// 恢复多指书写模式状态
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RestoreMultiTouchModeState(0);
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}
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else
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{
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timeMachine.ImportTimeMachineHistory(TimeMachineHistories[CurrentWhiteboardIndex]);
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// 通过时间机器历史恢复所有内容（墨迹和图片）
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foreach (var item in TimeMachineHistories[CurrentWhiteboardIndex]) ApplyHistoryToCanvas(item);
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// 恢复多指书写模式状态
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RestoreMultiTouchModeState(CurrentWhiteboardIndex);
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}
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}
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catch
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{
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// ignored
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}
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}
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/// <summary>
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/// 恢复多指书写模式状态
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/// </summary>
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private void RestoreMultiTouchModeState(int pageIndex)
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{
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try
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{
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// 检查是否保存了多指书写模式状态
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if (savedMultiTouchModeStates[pageIndex])
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{
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// 更新UI状态
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if (ToggleSwitchEnableMultiTouchMode != null)
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{
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ToggleSwitchEnableMultiTouchMode.IsOn = true;
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}
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LogHelper.WriteLogToFile($"恢复多指书写模式状态 - 页面索引: {pageIndex}", LogHelper.LogType.Info);
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}
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else
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{
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// 更新UI状态
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if (ToggleSwitchEnableMultiTouchMode != null)
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{
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ToggleSwitchEnableMultiTouchMode.IsOn = false;
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}
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}
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}
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catch (Exception ex)
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{
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LogHelper.WriteLogToFile($"恢复多指书写模式状态失败: {ex.Message}", LogHelper.LogType.Error);
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}
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}
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/// <summary>
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/// 处理白板页面索引按钮点击事件，显示或隐藏侧边页面列表
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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">事件参数</param>
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/// <remarks>
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/// - 处理左侧页面列表按钮点击：显示或隐藏左侧页面列表
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/// - 处理右侧页面列表按钮点击：显示或隐藏右侧页面列表
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/// - 显示页面列表时会刷新列表内容并滚动到当前页面
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/// </remarks>
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private async void BtnWhiteBoardPageIndex_Click(object sender, EventArgs e)
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{
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if (sender == BtnLeftPageListWB)
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{
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if (BoardBorderLeftPageListView.Visibility == Visibility.Visible)
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{
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AnimationsHelper.HideWithSlideAndFade(BoardBorderLeftPageListView);
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}
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else
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{
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AnimationsHelper.HideWithSlideAndFade(BoardBorderRightPageListView);
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RefreshBlackBoardSidePageListView();
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AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderLeftPageListView);
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await Task.Delay(1);
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var leftContainer = BlackBoardLeftSidePageListView.ItemContainerGenerator.ContainerFromIndex(
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CurrentWhiteboardIndex - 1) as ListViewItem;
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if (leftContainer != null)
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{
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ScrollViewToVerticalTop(leftContainer, BlackBoardLeftSidePageListScrollViewer);
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}
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}
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}
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else if (sender == BtnRightPageListWB)
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{
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if (BoardBorderRightPageListView.Visibility == Visibility.Visible)
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{
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AnimationsHelper.HideWithSlideAndFade(BoardBorderRightPageListView);
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}
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else
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{
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AnimationsHelper.HideWithSlideAndFade(BoardBorderLeftPageListView);
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RefreshBlackBoardSidePageListView();
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AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderRightPageListView);
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await Task.Delay(1);
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var rightContainer = BlackBoardRightSidePageListView.ItemContainerGenerator.ContainerFromIndex(
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CurrentWhiteboardIndex - 1) as ListViewItem;
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if (rightContainer != null)
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{
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ScrollViewToVerticalTop(rightContainer, BlackBoardRightSidePageListScrollViewer);
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}
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}
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}
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}
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/// <summary>
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/// 切换到前一白板页并在切换过程中保存与恢复画布和相关状态（如果当前已是第一页则不执行任何操作）。
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/// </summary>
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/// <remarks>
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/// 该方法在切换前会取消当前选中元素（同时保留并恢复编辑模式）、调用视频呈现器的离开页前钩子、保存当前页的笔迹与元素、清空画布；切换到前一页后恢复该页内容、调用视频呈现器的页已更改钩子并刷新页面索引显示。
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/// </remarks>
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private void BtnWhiteBoardSwitchPrevious_Click(object sender, EventArgs e)
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{
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if (CurrentWhiteboardIndex <= 1) return;
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// 隐藏图片选择工具栏
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if (currentSelectedElement != null)
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{
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// 保存当前编辑模式
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var previousEditingMode = inkCanvas.EditingMode;
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UnselectElement(currentSelectedElement);
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// 恢复编辑模式
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inkCanvas.EditingMode = previousEditingMode;
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currentSelectedElement = null;
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}
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VideoPresenter_BeforePageLeave();
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SaveStrokes();
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ClearStrokes(true);
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CurrentWhiteboardIndex--;
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RestoreStrokes();
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VideoPresenter_OnPageChanged();
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UpdateIndexInfoDisplay();
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}
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/// <summary>
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/// 切换到白板的下一页；在到达最后一页时会新增一页。方法在切页前保存当前页面的笔迹/多媒体状态，在切页后恢复目标页面的内容并更新界面状态。
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/// </summary>
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/// <param name="sender">触发事件的源对象（通常为按钮）。</param>
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/// <param name="e">事件参数。</param>
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private void BtnWhiteBoardSwitchNext_Click(object sender, EventArgs e)
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{
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if (Settings.Automation.IsAutoSaveStrokesAtClear &&
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inkCanvas.Strokes.Count > Settings.Automation.MinimumAutomationStrokeNumber) SaveScreenShot(true);
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if (CurrentWhiteboardIndex >= WhiteboardTotalCount)
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{
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// 在最后一页时，点击"新页面"按钮直接新增一页
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BtnWhiteBoardAdd_Click(sender, e);
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return;
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}
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// 隐藏图片选择工具栏
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if (currentSelectedElement != null)
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{
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// 保存当前编辑模式
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var previousEditingMode = inkCanvas.EditingMode;
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UnselectElement(currentSelectedElement);
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// 恢复编辑模式
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inkCanvas.EditingMode = previousEditingMode;
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currentSelectedElement = null;
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}
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VideoPresenter_BeforePageLeave();
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SaveStrokes();
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ClearStrokes(true);
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CurrentWhiteboardIndex++;
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RestoreStrokes();
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VideoPresenter_OnPageChanged();
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UpdateIndexInfoDisplay();
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}
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/// <summary>
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/// 在白板集合中添加一个新页面：在切换前保存并清除当前页面的笔迹与状态，插入新空白页面，恢复并刷新与页面相关的 UI 状态。
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/// </summary>
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/// <remarks>
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/// - 在达到最大页面数（99）时不执行任何操作。
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/// - 在切换前若启用了自动保存且笔迹数量超过阈值，会保存当前画面截图。
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/// - 若有选中元素，会取消选中并恢复编辑模式。
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/// - 将当前页面的历史保存到时间轴并清空画布，然后在白板集合中插入一个空白页面（其历史为 null），随后恢复该页面并触发页面变更回调。
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/// - 更新页码显示并在达到上限时禁用添加按钮；若侧边页列表可见，则刷新该列表。
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/// </remarks>
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private void BtnWhiteBoardAdd_Click(object sender, EventArgs e)
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{
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if (WhiteboardTotalCount >= 99) return;
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if (Settings.Automation.IsAutoSaveStrokesAtClear &&
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inkCanvas.Strokes.Count > Settings.Automation.MinimumAutomationStrokeNumber) SaveScreenShot(true);
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// 隐藏图片选择工具栏
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if (currentSelectedElement != null)
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{
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// 保存当前编辑模式
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var previousEditingMode = inkCanvas.EditingMode;
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UnselectElement(currentSelectedElement);
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// 恢复编辑模式
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inkCanvas.EditingMode = previousEditingMode;
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currentSelectedElement = null;
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}
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VideoPresenter_BeforePageLeave();
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SaveStrokes();
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ClearStrokes(true);
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WhiteboardTotalCount++;
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CurrentWhiteboardIndex++;
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if (CurrentWhiteboardIndex != WhiteboardTotalCount)
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for (var i = WhiteboardTotalCount; i > CurrentWhiteboardIndex; i--)
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TimeMachineHistories[i] = TimeMachineHistories[i - 1];
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// 确保新页面的历史记录为空
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TimeMachineHistories[CurrentWhiteboardIndex] = null;
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// 恢复新页面（这会清空画布，因为历史记录为null）
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RestoreStrokes();
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VideoPresenter_OnPageChanged();
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UpdateIndexInfoDisplay();
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if (WhiteboardTotalCount >= 99) BtnWhiteBoardAdd.IsEnabled = false;
|
||
|
||
if (BlackBoardLeftSidePageListView.Visibility == Visibility.Visible)
|
||
{
|
||
RefreshBlackBoardSidePageListView();
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 处理白板页面删除按钮点击事件，删除当前白板页面
|
||
/// </summary>
|
||
/// <param name="sender">事件发送者</param>
|
||
/// <param name="e">事件参数</param>
|
||
/// <remarks>
|
||
/// - 隐藏图片选择工具栏
|
||
/// - 清除当前画布内容
|
||
/// - 重新排列剩余页面的历史记录
|
||
/// - 更新当前页面索引和页面总数
|
||
/// - 恢复剩余页面内容
|
||
/// - 更新页码显示
|
||
/// - 启用添加按钮（如果页面总数小于99）
|
||
/// </remarks>
|
||
private void BtnWhiteBoardDelete_Click(object sender, RoutedEventArgs e)
|
||
{
|
||
// 隐藏图片选择工具栏
|
||
if (currentSelectedElement != null)
|
||
{
|
||
// 保存当前编辑模式
|
||
var previousEditingMode = inkCanvas.EditingMode;
|
||
UnselectElement(currentSelectedElement);
|
||
// 恢复编辑模式
|
||
inkCanvas.EditingMode = previousEditingMode;
|
||
currentSelectedElement = null;
|
||
}
|
||
|
||
ClearStrokes(true);
|
||
|
||
if (CurrentWhiteboardIndex != WhiteboardTotalCount)
|
||
for (var i = CurrentWhiteboardIndex; i <= WhiteboardTotalCount; i++)
|
||
TimeMachineHistories[i] = TimeMachineHistories[i + 1];
|
||
else
|
||
CurrentWhiteboardIndex--;
|
||
|
||
WhiteboardTotalCount--;
|
||
|
||
RestoreStrokes();
|
||
|
||
UpdateIndexInfoDisplay();
|
||
|
||
if (WhiteboardTotalCount < 99) BtnWhiteBoardAdd.IsEnabled = true;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 更新白板页码信息显示和按钮状态
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// - 更新页码显示文本
|
||
/// - 设置下一页按钮文本（根据是否为最后一页）
|
||
/// - 启用或禁用下一页按钮（根据是否为最后一页和最大页面数）
|
||
/// - 设置按钮颜色和透明度
|
||
/// - 启用或禁用上一页按钮（根据是否为第一页）
|
||
/// - 设置删除按钮状态（根据页面总数）
|
||
/// </remarks>
|
||
private void UpdateIndexInfoDisplay()
|
||
{
|
||
TextBlockWhiteBoardIndexInfo.Text =
|
||
$"{CurrentWhiteboardIndex}/{WhiteboardTotalCount}";
|
||
|
||
bool isLastPage = CurrentWhiteboardIndex == WhiteboardTotalCount;
|
||
bool isMaxPage = WhiteboardTotalCount >= 99;
|
||
|
||
// 设置按钮文本
|
||
BtnLeftWhiteBoardSwitchNextLabel.Text = isLastPage ? "新页面" : "下一页";
|
||
BtnRightWhiteBoardSwitchNextLabel.Text = isLastPage ? "新页面" : "下一页";
|
||
|
||
if (isLastPage)
|
||
{
|
||
BtnWhiteBoardSwitchNext.IsEnabled = !isMaxPage;
|
||
}
|
||
else
|
||
{
|
||
BtnWhiteBoardSwitchNext.IsEnabled = true;
|
||
}
|
||
|
||
// 获取主题颜色资源
|
||
var iconForegroundBrush = Application.Current.FindResource("IconForeground") as SolidColorBrush;
|
||
|
||
// 设置下一页按钮颜色
|
||
if (iconForegroundBrush != null)
|
||
{
|
||
BtnLeftWhiteBoardSwitchNextGeometry.Brush = iconForegroundBrush;
|
||
BtnRightWhiteBoardSwitchNextGeometry.Brush = iconForegroundBrush;
|
||
}
|
||
BtnLeftWhiteBoardSwitchNextLabel.Opacity = 1;
|
||
BtnRightWhiteBoardSwitchNextLabel.Opacity = 1;
|
||
|
||
BtnWhiteBoardSwitchPrevious.IsEnabled = true;
|
||
|
||
if (CurrentWhiteboardIndex == 1)
|
||
{
|
||
BtnWhiteBoardSwitchPrevious.IsEnabled = false;
|
||
if (iconForegroundBrush != null)
|
||
{
|
||
var disabledBrush = new SolidColorBrush(Color.FromArgb(127, iconForegroundBrush.Color.R, iconForegroundBrush.Color.G, iconForegroundBrush.Color.B));
|
||
BtnLeftWhiteBoardSwitchPreviousGeometry.Brush = disabledBrush;
|
||
BtnRightWhiteBoardSwitchPreviousGeometry.Brush = disabledBrush;
|
||
}
|
||
BtnLeftWhiteBoardSwitchPreviousLabel.Opacity = 0.5;
|
||
BtnRightWhiteBoardSwitchPreviousLabel.Opacity = 0.5;
|
||
}
|
||
else
|
||
{
|
||
if (iconForegroundBrush != null)
|
||
{
|
||
BtnLeftWhiteBoardSwitchPreviousGeometry.Brush = iconForegroundBrush;
|
||
BtnRightWhiteBoardSwitchPreviousGeometry.Brush = iconForegroundBrush;
|
||
}
|
||
BtnLeftWhiteBoardSwitchPreviousLabel.Opacity = 1;
|
||
BtnRightWhiteBoardSwitchPreviousLabel.Opacity = 1;
|
||
}
|
||
|
||
BtnWhiteBoardDelete.IsEnabled = WhiteboardTotalCount != 1;
|
||
}
|
||
}
|
||
} |