339 lines
16 KiB
C#
339 lines
16 KiB
C#
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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using Ink_Canvas.Helpers;
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namespace Ink_Canvas {
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public partial class MainWindow : Window {
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private enum CommitReason {
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UserInput,
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CodeInput,
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ShapeDrawing,
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ShapeRecognition,
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ClearingCanvas,
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Manipulation
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}
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private CommitReason _currentCommitType = CommitReason.UserInput;
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private bool IsEraseByPoint => inkCanvas.EditingMode == InkCanvasEditingMode.EraseByPoint;
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private StrokeCollection ReplacedStroke;
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private StrokeCollection AddedStroke;
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private StrokeCollection CuboidStrokeCollection;
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private Dictionary<Stroke, Tuple<StylusPointCollection, StylusPointCollection>> StrokeManipulationHistory;
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private Dictionary<Stroke, StylusPointCollection> StrokeInitialHistory =
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new Dictionary<Stroke, StylusPointCollection>();
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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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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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private TimeMachine timeMachine = new TimeMachine();
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private void ApplyHistoryToCanvas(TimeMachineHistory item, InkCanvas applyCanvas = null) {
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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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canvas = applyCanvas;
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}
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if (item.CommitType == TimeMachineHistoryType.UserInput) {
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if (!item.StrokeHasBeenCleared) {
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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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} else {
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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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} else if (item.CommitType == TimeMachineHistoryType.ShapeRecognition) {
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if (item.StrokeHasBeenCleared) {
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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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} else {
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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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} else if (item.CommitType == TimeMachineHistoryType.Manipulation) {
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if (!item.StrokeHasBeenCleared) {
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foreach (var currentStroke in item.StylusPointDictionary) {
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if (canvas.Strokes.Contains(currentStroke.Key)) {
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currentStroke.Key.StylusPoints = currentStroke.Value.Item2;
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}
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}
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} else {
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foreach (var currentStroke in item.StylusPointDictionary) {
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if (canvas.Strokes.Contains(currentStroke.Key)) {
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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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} else if (item.CommitType == TimeMachineHistoryType.DrawingAttributes) {
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if (!item.StrokeHasBeenCleared) {
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foreach (var currentStroke in item.DrawingAttributes) {
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if (canvas.Strokes.Contains(currentStroke.Key)) {
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currentStroke.Key.DrawingAttributes = currentStroke.Value.Item2;
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}
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}
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} else {
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foreach (var currentStroke in item.DrawingAttributes) {
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if (canvas.Strokes.Contains(currentStroke.Key)) {
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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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} else if (item.CommitType == TimeMachineHistoryType.Clear) {
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if (!item.StrokeHasBeenCleared) {
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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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} else {
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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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} else if (item.CommitType == TimeMachineHistoryType.ElementInsert) {
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// 使用传入的canvas参数，而不是总是使用inkCanvas
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var targetCanvas = canvas ?? inkCanvas;
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if (item.StrokeHasBeenCleared) {
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// Undo: 移除元素
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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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} else {
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// Redo: 添加元素
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if (item.InsertedElement != null && !targetCanvas.Children.Contains(item.InsertedElement)) {
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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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if (item.InsertedElement is Image img) {
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img.MouseDown -= UIElement_MouseDown;
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img.MouseDown += UIElement_MouseDown;
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img.IsManipulationEnabled = true;
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// 重新应用CenterAndScaleElement变换
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CenterAndScaleElement(img);
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} else if (item.InsertedElement is MediaElement media) {
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media.MouseDown -= UIElement_MouseDown;
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media.MouseDown += UIElement_MouseDown;
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media.IsManipulationEnabled = true;
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// 重新应用CenterAndScaleElement变换
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CenterAndScaleElement(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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private StrokeCollection ApplyHistoriesToNewStrokeCollection(TimeMachineHistory[] items) {
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InkCanvas fakeInkCanv = new InkCanvas {
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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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foreach (var timeMachineHistory in items) {
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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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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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// 新增：获取页面的所有图片元素
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private List<UIElement> GetPageImageElements(TimeMachineHistory[] items) {
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var imageElements = new List<UIElement>();
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if (items != null && items.Length > 0) {
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foreach (var timeMachineHistory in items) {
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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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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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private void TimeMachine_OnUndoStateChanged(bool status) {
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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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private void TimeMachine_OnRedoStateChanged(bool status) {
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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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private void StrokesOnStrokesChanged(object sender, StrokeCollectionChangedEventArgs e) {
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if (!isHidingSubPanelsWhenInking) {
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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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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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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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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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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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if (_currentCommitType == CommitReason.ShapeRecognition) {
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ReplacedStroke = e.Removed;
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} else if (!IsEraseByPoint || _currentCommitType == CommitReason.ClearingCanvas) {
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timeMachine.CommitStrokeEraseHistory(e.Removed);
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}
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}
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}
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private void Stroke_DrawingAttributesChanged(object sender, PropertyDataChangedEventArgs e) {
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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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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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previousValue.Color = (Color)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.IsHighlighter && needUpdateValue) {
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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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previousValue.Height = (double)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.StylusWidth && needUpdateValue) {
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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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previousValue.StylusTip = (StylusTip)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.StylusTipTransform && needUpdateValue) {
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previousValue.StylusTipTransform = (Matrix)e.PreviousValue;
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}
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if (e.PropertyGuid == DrawingAttributeIds.DrawingFlags && needUpdateValue) {
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previousValue.IgnorePressure = (bool)e.PreviousValue;
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}
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DrawingAttributesHistory[key] =
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new Tuple<DrawingAttributes, DrawingAttributes>(previousValue, currentValue);
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}
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private void Stroke_StylusPointsReplaced(object sender, StylusPointsReplacedEventArgs e) {
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StrokeInitialHistory[sender as Stroke] = e.NewStylusPoints.Clone();
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}
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private void Stroke_StylusPointsChanged(object sender, EventArgs e) {
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var selectedStrokes = inkCanvas.GetSelectedStrokes();
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var count = selectedStrokes.Count;
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if (count == 0) count = inkCanvas.Strokes.Count;
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if (StrokeManipulationHistory == null) {
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StrokeManipulationHistory =
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new Dictionary<Stroke, Tuple<StylusPointCollection, StylusPointCollection>>();
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}
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StrokeManipulationHistory[sender as Stroke] =
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new Tuple<StylusPointCollection, StylusPointCollection>(StrokeInitialHistory[sender as Stroke],
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(sender as Stroke).StylusPoints.Clone());
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if ((StrokeManipulationHistory.Count == count || sender == null) && dec.Count == 0) {
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timeMachine.CommitStrokeManipulationHistory(StrokeManipulationHistory);
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foreach (var item in StrokeManipulationHistory) {
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StrokeInitialHistory[item.Key] = item.Value.Item2;
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}
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StrokeManipulationHistory = null;
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}
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}
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}
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} |