前台
<Window x:Class="FinalTest.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:local="clr-namespace:FinalTest"mc:Ignorable="d"Title="MainWindow" Height="450" Width="800"><Grid><InkCanvas Name="inkCanvas" IsManipulationEnabled="True"/></Grid>
</Window>
后台
public partial class MainWindow : Window{private DateTime _strokeStartTime;private Stroke _currentStroke;private bool _isMouseDrawing;public MainWindow(){InitializeComponent();InitializeInkCanvas();}private void InitializeInkCanvas(){// 基础配置inkCanvas.DefaultDrawingAttributes = new DrawingAttributes{Color = Colors.Black,Width = 2,Height = 2};// 触控笔事件inkCanvas.StylusDown += Input_Start;inkCanvas.StylusUp += Input_End;inkCanvas.StylusMove += Stylus_Move;// 鼠标事件inkCanvas.PreviewMouseDown += Input_Start;inkCanvas.MouseUp += Input_End;inkCanvas.MouseMove += Mouse_Move;}// 统一输入开始处理private void Input_Start(object sender, InputEventArgs e){// 防止重复触发if (_currentStroke != null) return;_strokeStartTime = DateTime.Now;// 创建新笔迹_currentStroke = CreateNewStroke(e);inkCanvas.Strokes.Add(_currentStroke);// 标记鼠标绘制状态_isMouseDrawing = e is MouseButtonEventArgs;}// 统一输入结束处理private void Input_End(object sender, InputEventArgs e){if (_currentStroke == null) return;// 计算持续时间var duration = DateTime.Now - _strokeStartTime;AdjustStrokeWidth(_currentStroke, duration);// 重置状态_currentStroke = null;_isMouseDrawing = false;}// 处理鼠标移动时的笔迹更新private void Mouse_Move(object sender, MouseEventArgs e){if (!_isMouseDrawing || _currentStroke == null) return;// 添加当前鼠标位置到笔迹var point = e.GetPosition(inkCanvas);_currentStroke.StylusPoints.Add(new StylusPoint(point.X, point.Y, 0.5f) // 默认压力值);}private void Stylus_Move(object sender, StylusEventArgs e){if (_isMouseDrawing || _currentStroke == null) return;// 添加当前鼠标位置到笔迹var stylusPos = e.GetStylusPoints(inkCanvas);_currentStroke.StylusPoints.Add(stylusPos);}// 创建新笔迹的通用方法private Stroke CreateNewStroke(InputEventArgs e){StylusPointCollection points = new StylusPointCollection();switch (e){case StylusDownEventArgs stylusEvent:points = stylusEvent.GetStylusPoints(inkCanvas);break;case MouseButtonEventArgs mouseEvent:var pos = mouseEvent.GetPosition(inkCanvas);points = new StylusPointCollection{new StylusPoint(pos.X, pos.Y, 0.5f) // 模拟压力值};break;default:throw new NotSupportedException("Unsupported input type");}return new Stroke(points){DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()};}// 调整笔迹宽度（保持不变）private void AdjustStrokeWidth(Stroke stroke, TimeSpan duration){double baseWidth = 2;double maxWidth = 10;double timeFactor = Math.Min(duration.TotalSeconds, 2);// 使用二次曲线调整double ratio = Math.Pow(timeFactor / 2, 2);double newWidth = baseWidth + (maxWidth - baseWidth) * ratio;stroke.DrawingAttributes.Width = newWidth;stroke.DrawingAttributes.Height = newWidth;}}
