using Ink_Canvas.Helpers; using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using Point = System.Windows.Point; namespace Ink_Canvas { public partial class MainWindow : Window { #region Multi-Touch bool isInMultiTouchMode = false; private void BorderMultiTouchMode_MouseUp(object sender, MouseButtonEventArgs e) { if (isInMultiTouchMode) { inkCanvas.StylusDown -= MainWindow_StylusDown; inkCanvas.StylusMove -= MainWindow_StylusMove; inkCanvas.StylusUp -= MainWindow_StylusUp; inkCanvas.TouchDown -= MainWindow_TouchDown; inkCanvas.TouchDown += Main_Grid_TouchDown; inkCanvas.EditingMode = InkCanvasEditingMode.Ink; inkCanvas.Children.Clear(); isInMultiTouchMode = false; } else { inkCanvas.StylusDown += MainWindow_StylusDown; inkCanvas.StylusMove += MainWindow_StylusMove; inkCanvas.StylusUp += MainWindow_StylusUp; inkCanvas.TouchDown += MainWindow_TouchDown; inkCanvas.TouchDown -= Main_Grid_TouchDown; inkCanvas.EditingMode = InkCanvasEditingMode.None; inkCanvas.Children.Clear(); isInMultiTouchMode = true; } } private void MainWindow_TouchDown(object sender, TouchEventArgs e) { if (inkCanvas.EditingMode == InkCanvasEditingMode.EraseByPoint || inkCanvas.EditingMode == InkCanvasEditingMode.EraseByStroke || inkCanvas.EditingMode == InkCanvasEditingMode.Select) return; if (!isHidingSubPanelsWhenInking) { isHidingSubPanelsWhenInking = true; HideSubPanels(); // 书写时自动隐藏二级菜单 } double boundWidth = e.GetTouchPoint(null).Bounds.Width, eraserMultiplier = 1.0; if (!Settings.Advanced.EraserBindTouchMultiplier && Settings.Advanced.IsSpecialScreen) { eraserMultiplier = 1 / Settings.Advanced.TouchMultiplier; } if ((Settings.Advanced.TouchMultiplier != 0 || !Settings.Advanced.IsSpecialScreen) //启用特殊屏幕且触摸倍数为 0 时禁用橡皮 && (boundWidth > BoundsWidth * 2.5)) { if (drawingShapeMode == 0 && forceEraser) return; double k = 1; switch (Settings.Canvas.EraserSize) { case 0: k = 0.5; break; case 1: k = 0.8; break; case 3: k = 1.25; break; case 4: k = 1.8; break; } inkCanvas.EraserShape = new EllipseStylusShape(boundWidth * k * eraserMultiplier * 0.25, boundWidth * k * eraserMultiplier * 0.25); TouchDownPointsList[e.TouchDevice.Id] = InkCanvasEditingMode.EraseByPoint; inkCanvas.EditingMode = InkCanvasEditingMode.EraseByPoint; } else { TouchDownPointsList[e.TouchDevice.Id] = InkCanvasEditingMode.None; inkCanvas.EditingMode = InkCanvasEditingMode.None; } } private void MainWindow_StylusDown(object sender, StylusDownEventArgs e) { if (inkCanvas.EditingMode == InkCanvasEditingMode.EraseByPoint || inkCanvas.EditingMode == InkCanvasEditingMode.EraseByStroke || inkCanvas.EditingMode == InkCanvasEditingMode.Select) return; TouchDownPointsList[e.StylusDevice.Id] = InkCanvasEditingMode.None; } private async void MainWindow_StylusUp(object sender, StylusEventArgs e) { try { inkCanvas.Strokes.Add(GetStrokeVisual(e.StylusDevice.Id).Stroke); await Task.Delay(5); // 避免渲染墨迹完成前预览墨迹被删除导致墨迹闪烁 inkCanvas.Children.Remove(GetVisualCanvas(e.StylusDevice.Id)); inkCanvas_StrokeCollected(inkCanvas, new InkCanvasStrokeCollectedEventArgs(GetStrokeVisual(e.StylusDevice.Id).Stroke)); } catch (Exception ex) { Label.Content = ex.ToString(); } try { StrokeVisualList.Remove(e.StylusDevice.Id); VisualCanvasList.Remove(e.StylusDevice.Id); TouchDownPointsList.Remove(e.StylusDevice.Id); if (StrokeVisualList.Count == 0 || VisualCanvasList.Count == 0 || TouchDownPointsList.Count == 0) { inkCanvas.Children.Clear(); StrokeVisualList.Clear(); VisualCanvasList.Clear(); TouchDownPointsList.Clear(); } } catch { } } private void MainWindow_StylusMove(object sender, StylusEventArgs e) { try { if (GetTouchDownPointsList(e.StylusDevice.Id) != InkCanvasEditingMode.None) return; try { if (e.StylusDevice.StylusButtons[1].StylusButtonState == StylusButtonState.Down) return; } catch { } var strokeVisual = GetStrokeVisual(e.StylusDevice.Id); var stylusPointCollection = e.GetStylusPoints(this); foreach (var stylusPoint in stylusPointCollection) { strokeVisual.Add(new StylusPoint(stylusPoint.X, stylusPoint.Y, stylusPoint.PressureFactor)); } strokeVisual.Redraw(); } catch { } } private StrokeVisual GetStrokeVisual(int id) { if (StrokeVisualList.TryGetValue(id, out var visual)) { return visual; } var strokeVisual = new StrokeVisual(inkCanvas.DefaultDrawingAttributes.Clone()); StrokeVisualList[id] = strokeVisual; StrokeVisualList[id] = strokeVisual; var visualCanvas = new VisualCanvas(strokeVisual); VisualCanvasList[id] = visualCanvas; inkCanvas.Children.Add(visualCanvas); return strokeVisual; } private VisualCanvas GetVisualCanvas(int id) { if (VisualCanvasList.TryGetValue(id, out var visualCanvas)) { return visualCanvas; } return null; } private InkCanvasEditingMode GetTouchDownPointsList(int id) { if (TouchDownPointsList.TryGetValue(id, out var inkCanvasEditingMode)) { return inkCanvasEditingMode; } return inkCanvas.EditingMode; } private Dictionary TouchDownPointsList { get; } = new Dictionary(); private Dictionary StrokeVisualList { get; } = new Dictionary(); private Dictionary VisualCanvasList { get; } = new Dictionary(); #endregion int lastTouchDownTime = 0, lastTouchUpTime = 0; Point iniP = new Point(0, 0); bool isLastTouchEraser = false; private bool forcePointEraser = true; private void Main_Grid_TouchDown(object sender, TouchEventArgs e) { if (!isHidingSubPanelsWhenInking) { isHidingSubPanelsWhenInking = true; HideSubPanels(); // 书写时自动隐藏二级菜单 } if (NeedUpdateIniP()) { iniP = e.GetTouchPoint(inkCanvas).Position; } if (drawingShapeMode == 9 && isFirstTouchCuboid == false) { MouseTouchMove(iniP); } inkCanvas.Opacity = 1; double boundsWidth = GetTouchBoundWidth(e), eraserMultiplier = 1.0; if (!Settings.Advanced.EraserBindTouchMultiplier && Settings.Advanced.IsSpecialScreen) { eraserMultiplier = 1 / Settings.Advanced.TouchMultiplier; } if (boundsWidth > BoundsWidth) { isLastTouchEraser = true; if (drawingShapeMode == 0 && forceEraser) return; if (boundsWidth > BoundsWidth * 2.5) { double k = 1; switch (Settings.Canvas.EraserSize) { case 0: k = 0.5; break; case 1: k = 0.8; break; case 3: k = 1.25; break; case 4: k = 1.8; break; } inkCanvas.EraserShape = new EllipseStylusShape(boundsWidth * k * eraserMultiplier, boundsWidth * k * eraserMultiplier); inkCanvas.EditingMode = InkCanvasEditingMode.EraseByPoint; } else { if (StackPanelPPTControls.Visibility == Visibility.Visible && inkCanvas.Strokes.Count == 0 && Settings.PowerPointSettings.IsEnableFingerGestureSlideShowControl) { isLastTouchEraser = false; inkCanvas.EditingMode = InkCanvasEditingMode.GestureOnly; inkCanvas.Opacity = 0.1; } else { inkCanvas.EraserShape = new EllipseStylusShape(5, 5); inkCanvas.EditingMode = InkCanvasEditingMode.EraseByStroke; } } } else { isLastTouchEraser = false; inkCanvas.EraserShape = forcePointEraser ? new EllipseStylusShape(50, 50) : new EllipseStylusShape(5, 5); if (forceEraser) return; inkCanvas.EditingMode = InkCanvasEditingMode.Ink; } } public double GetTouchBoundWidth(TouchEventArgs e) { var args = e.GetTouchPoint(null).Bounds; double value; if (!Settings.Advanced.IsQuadIR) value = args.Width; else value = Math.Sqrt(args.Width * args.Height); //四边红外 if (Settings.Advanced.IsSpecialScreen) value *= Settings.Advanced.TouchMultiplier; return value; } //记录触摸设备ID private List dec = new List(); //中心点 System.Windows.Point centerPoint; InkCanvasEditingMode lastInkCanvasEditingMode = InkCanvasEditingMode.Ink; bool isSingleFingerDragMode = false; private void inkCanvas_PreviewTouchDown(object sender, TouchEventArgs e) { dec.Add(e.TouchDevice.Id); //设备1个的时候，记录中心点 if (dec.Count == 1) { TouchPoint touchPoint = e.GetTouchPoint(inkCanvas); centerPoint = touchPoint.Position; //记录第一根手指点击时的 StrokeCollection lastTouchDownStrokeCollection = inkCanvas.Strokes.Clone(); } //设备两个及两个以上，将画笔功能关闭 if (dec.Count > 1 || isSingleFingerDragMode || !Settings.Gesture.IsEnableTwoFingerGesture) { if (isInMultiTouchMode || !Settings.Gesture.IsEnableTwoFingerGesture) return; if (inkCanvas.EditingMode != InkCanvasEditingMode.None && inkCanvas.EditingMode != InkCanvasEditingMode.Select) { lastInkCanvasEditingMode = inkCanvas.EditingMode; inkCanvas.EditingMode = InkCanvasEditingMode.None; } } } private void inkCanvas_PreviewTouchUp(object sender, TouchEventArgs e) { //手势完成后切回之前的状态 if (dec.Count > 1) { if (inkCanvas.EditingMode == InkCanvasEditingMode.None) { inkCanvas.EditingMode = lastInkCanvasEditingMode; } } dec.Remove(e.TouchDevice.Id); inkCanvas.Opacity = 1; if (dec.Count == 0) { if (lastTouchDownStrokeCollection.Count() != inkCanvas.Strokes.Count() && !(drawingShapeMode == 9 && !isFirstTouchCuboid)) { int whiteboardIndex = CurrentWhiteboardIndex; if (currentMode == 0) { whiteboardIndex = 0; } strokeCollections[whiteboardIndex] = lastTouchDownStrokeCollection; } } } private void inkCanvas_ManipulationStarting(object sender, ManipulationStartingEventArgs e) { e.Mode = ManipulationModes.All; } private void inkCanvas_ManipulationInertiaStarting(object sender, ManipulationInertiaStartingEventArgs e) { } private void Main_Grid_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e) { if (e.Manipulators.Count() == 0) { if (forceEraser) return; inkCanvas.EditingMode = InkCanvasEditingMode.Ink; } } private void inkCanvas_ManipulationStarted(object sender, ManipulationStartedEventArgs e) { if (isInMultiTouchMode || !Settings.Gesture.IsEnableTwoFingerGesture || inkCanvas.Strokes.Count == 0 || dec.Count() < 2) return; _currentCommitType = CommitReason.Manipulation; StrokeCollection strokes = inkCanvas.GetSelectedStrokes(); if (strokes.Count != 0) { inkCanvas.Strokes.Replace(strokes, strokes.Clone()); } else { var originalStrokes = inkCanvas.Strokes; var targetStrokes = originalStrokes.Clone(); originalStrokes.Replace(originalStrokes, targetStrokes); } _currentCommitType = CommitReason.UserInput; } private void Main_Grid_ManipulationDelta(object sender, ManipulationDeltaEventArgs e) { if (isInMultiTouchMode || !Settings.Gesture.IsEnableTwoFingerGesture) return; if ((dec.Count >= 2 && (Settings.PowerPointSettings.IsEnableTwoFingerGestureInPresentationMode || StackPanelPPTControls.Visibility != Visibility.Visible || StackPanelPPTButtons.Visibility == Visibility.Collapsed)) || isSingleFingerDragMode) { ManipulationDelta md = e.DeltaManipulation; Vector trans = md.Translation; // 获得位移矢量 Matrix m = new Matrix(); if (Settings.Gesture.IsEnableTwoFingerTranslate) m.Translate(trans.X, trans.Y); // 移动 if (Settings.Gesture.IsEnableTwoFingerGestureTranslateOrRotation) { double rotate = md.Rotation; // 获得旋转角度 Vector scale = md.Scale; // 获得缩放倍数 // Find center of element and then transform to get current location of center FrameworkElement fe = e.Source as FrameworkElement; Point center = new Point(fe.ActualWidth / 2, fe.ActualHeight / 2); center = m.Transform(center); // 转换为矩阵缩放和旋转的中心点 if (Settings.Gesture.IsEnableTwoFingerRotation) m.RotateAt(rotate, center.X, center.Y); // 旋转 if (Settings.Gesture.IsEnableTwoFingerZoom) m.ScaleAt(scale.X, scale.Y, center.X, center.Y); // 缩放 } StrokeCollection strokes = inkCanvas.GetSelectedStrokes(); if (strokes.Count != 0) { foreach (Stroke stroke in strokes) { stroke.Transform(m, false); foreach (Circle circle in circles) { if (stroke == circle.Stroke) { circle.R = GetDistance(circle.Stroke.StylusPoints[0].ToPoint(), circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].ToPoint()) / 2; circle.Centroid = new Point((circle.Stroke.StylusPoints[0].X + circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].X) / 2, (circle.Stroke.StylusPoints[0].Y + circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].Y) / 2); break; } } if (Settings.Gesture.IsEnableTwoFingerZoom) { try { stroke.DrawingAttributes.Width *= md.Scale.X; stroke.DrawingAttributes.Height *= md.Scale.Y; } catch { } } } } else { if (Settings.Gesture.IsEnableTwoFingerZoom) { foreach (Stroke stroke in inkCanvas.Strokes) { stroke.Transform(m, false); try { stroke.DrawingAttributes.Width *= md.Scale.X; stroke.DrawingAttributes.Height *= md.Scale.Y; } catch { } }; } else { foreach (Stroke stroke in inkCanvas.Strokes) { stroke.Transform(m, false); }; } foreach (Circle circle in circles) { circle.R = GetDistance(circle.Stroke.StylusPoints[0].ToPoint(), circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].ToPoint()) / 2; circle.Centroid = new Point( (circle.Stroke.StylusPoints[0].X + circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].X) / 2, (circle.Stroke.StylusPoints[0].Y + circle.Stroke.StylusPoints[circle.Stroke.StylusPoints.Count / 2].Y) / 2 ); }; } } } } }