[update] 形状绘制,墨迹离屏停止渲染
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@ -17,6 +17,13 @@ namespace Ink_Canvas {
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public IccStroke(StylusPointCollection stylusPoints, DrawingAttributes drawingAttributes)
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: base(stylusPoints, drawingAttributes) { }
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public IccStroke(StylusPointCollection stylusPoints, DrawingAttributes drawingAttributes, IccInkCanvas hostElement)
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: base(stylusPoints, drawingAttributes) {
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if (hostElement != null) _hostInkCanvas = hostElement;
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}
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public IccInkCanvas _hostInkCanvas = null;
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public static Guid StrokeShapeTypeGuid = new Guid("6537b29c-557f-487f-800b-cb30a8f1de78");
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public static Guid StrokeIsShapeGuid = new Guid("40eff5db-9346-4e42-bd46-7b0eb19d0018");
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@ -25,9 +32,32 @@ namespace Ink_Canvas {
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public MainWindow.ShapeDrawingHelper.ArrowLineConfig ArrowLineConfig { get; set; } =
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new MainWindow.ShapeDrawingHelper.ArrowLineConfig();
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/// <summary>
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/// 根据这个属性判断当前 Stroke 是否是原始输入
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/// </summary>
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public bool IsRawStylusPoints = true;
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/// <summary>
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/// 根据这个属性决定在绘制 Stroke 时是否需要在直线形状中,在两点构成直线上分布点,用于墨迹的范围框选。
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/// </summary>
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public bool IsDistributePointsOnLineShape = true;
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/// <summary>
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/// 指示该墨迹是否来自一个完整墨迹被擦除后的一部分墨迹,仅用于形状墨迹。
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/// </summary>
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public bool IsErasedStrokePart = false;
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/// <summary>
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/// 指示当墨迹在屏幕外部时,是否停止渲染
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/// </summary>
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public bool IsStopOffScreenRender = true;
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// 自定义的墨迹渲染
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protected override void DrawCore(DrawingContext drawingContext,
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DrawingAttributes drawingAttributes) {
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if (IsStopOffScreenRender && new StrokeCollection(){this}.HitTest(new Rect(new Point(0,0), new Size(_hostInkCanvas.ActualWidth,_hostInkCanvas.ActualHeight)), 1).Count == 0) return;
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if (!(this.ContainsPropertyData(StrokeIsShapeGuid) &&
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(bool)this.GetPropertyData(StrokeIsShapeGuid) == true)) {
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base.DrawCore(drawingContext, drawingAttributes);
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@ -43,8 +73,20 @@ namespace Ink_Canvas {
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base.DrawCore(drawingContext, drawingAttributes);
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return;
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}
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StreamGeometry geometry = new StreamGeometry();
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var pts = new List<Point>(this.StylusPoints.ToPoints());
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if (IsDistributePointsOnLineShape && (
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(int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.DashedLine ||
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(int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.Line ||
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(int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.DottedLine) && IsRawStylusPoints) {
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IsRawStylusPoints = false;
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RawStylusPointCollection = StylusPoints.Clone();
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var pointList = new List<Point> { new Point(StylusPoints[0].X, StylusPoints[0].Y) };
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pointList.AddRange(MainWindow.ShapeDrawingHelper.DistributePointsOnLine(new Point(StylusPoints[0].X, StylusPoints[0].Y),new Point(StylusPoints[1].X, StylusPoints[1].Y)));
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pointList.Add(new Point(StylusPoints[1].X, StylusPoints[1].Y));
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StylusPoints = new StylusPointCollection(pointList);
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}
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StreamGeometry geometry = new StreamGeometry();
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using (StreamGeometryContext ctx = geometry.Open()) {
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ctx.BeginFigure(pts[0], false , false);
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pts.RemoveAt(0);
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@ -61,7 +103,8 @@ namespace Ink_Canvas {
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(int)this.GetPropertyData(StrokeShapeTypeGuid) != (int)MainWindow.ShapeDrawingType.ArrowTwoSide)
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pen.DashStyle = (int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.DottedLine ? DashStyles.Dot : DashStyles.Dash;
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if ((int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.ArrowOneSide) {
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if ((int)this.GetPropertyData(StrokeShapeTypeGuid) == (int)MainWindow.ShapeDrawingType.ArrowOneSide && IsRawStylusPoints) {
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IsRawStylusPoints = false;
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pts = new List<Point>(this.StylusPoints.ToPoints());
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RawStylusPointCollection = StylusPoints.Clone();
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double w = ArrowLineConfig.ArrowWidth, h = ArrowLineConfig.ArrowHeight;
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@ -70,11 +113,14 @@ namespace Ink_Canvas {
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var cost = Math.Cos(theta);
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var pointList = new List<Point> {
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new Point(pts[0].X, pts[0].Y),
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};
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if (IsDistributePointsOnLineShape) pointList.AddRange(MainWindow.ShapeDrawingHelper.DistributePointsOnLine(new Point(pts[0].X, pts[0].Y),new Point(pts[1].X, pts[1].Y)));
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pointList.AddRange(new List<Point> {
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new Point(pts[1].X, pts[1].Y),
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new Point(pts[1].X + (w * cost - h * sint), pts[1].Y + (w * sint + h * cost)),
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new Point(pts[1].X, pts[1].Y),
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new Point(pts[1].X + (w * cost + h * sint), pts[1].Y - (h * cost - w * sint)),
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};
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});
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StylusPoints = new StylusPointCollection(pointList);
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var _pts = new List<Point>(this.StylusPoints.ToPoints());
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using (StreamGeometryContext ctx = geometry.Open()) {
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@ -121,14 +167,16 @@ namespace Ink_Canvas {
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}));
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}
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protected override void OnStrokeCollected(InkCanvasStrokeCollectedEventArgs e)
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{
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// Remove the original stroke and add a custom stroke.
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this.Strokes.Remove(e.Stroke);
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IccStroke customStroke = new IccStroke(e.Stroke.StylusPoints, e.Stroke.DrawingAttributes);
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this.Strokes.Add(customStroke);
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protected override void OnStrokeCollected(InkCanvasStrokeCollectedEventArgs e) {
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IccStroke customStroke = new IccStroke(e.Stroke.StylusPoints, e.Stroke.DrawingAttributes, this);
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if (e.Stroke is IccStroke) {
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if ((e.Stroke as IccStroke)._hostInkCanvas == null) (e.Stroke as IccStroke)._hostInkCanvas = this;
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this.Strokes.Add(e.Stroke);
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} else {
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this.Strokes.Remove(e.Stroke);
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this.Strokes.Add(customStroke);
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}
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// Pass the custom stroke to base class' OnStrokeCollected method.
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InkCanvasStrokeCollectedEventArgs args =
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new InkCanvasStrokeCollectedEventArgs(customStroke);
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base.OnStrokeCollected(args);
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@ -1,4 +1,5 @@
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using System;
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using System.Collections.Generic;
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using System.Windows;
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using System.Windows.Ink;
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using System.Windows.Input;
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@ -8,7 +9,7 @@ namespace Ink_Canvas {
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public partial class MainWindow : Window {
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public StrokeCollection DrawShapeCore(PointCollection pts, ShapeDrawingType type) {
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public StrokeCollection DrawShapeCore(PointCollection pts, ShapeDrawingType type, bool doNotDisturbutePoints) {
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// 线
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if (type == MainWindow.ShapeDrawingType.Line ||
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type == MainWindow.ShapeDrawingType.DashedLine ||
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@ -19,7 +20,9 @@ namespace Ink_Canvas {
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var stk = new IccStroke(new StylusPointCollection() {
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new StylusPoint(pts[0].X, pts[0].Y),
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new StylusPoint(pts[1].X, pts[1].Y),
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}, inkCanvas.DefaultDrawingAttributes.Clone());
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}, inkCanvas.DefaultDrawingAttributes.Clone()) {
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IsDistributePointsOnLineShape = !doNotDisturbutePoints
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};
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stk.AddPropertyData(IccStroke.StrokeIsShapeGuid, true);
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stk.AddPropertyData(IccStroke.StrokeShapeTypeGuid, (int)type);
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return new StrokeCollection() { stk };
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@ -51,6 +54,25 @@ namespace Ink_Canvas {
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return rotateAngle;
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}
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public static List<Point> DistributePointsOnLine(Point start, Point end, double interval=16) {
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List<Point> points = new List<Point>();
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double dx = end.X - start.X;
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double dy = end.Y - start.Y;
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double distance = Math.Sqrt(dx * dx + dy * dy);
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int numPoints = (int)(distance / interval);
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for (int i = 0; i <= numPoints; i++) {
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double ratio = (interval * i) / distance;
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double x = start.X + ratio * dx;
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double y = start.Y + ratio * dy;
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points.Add(new Point(x, y));
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}
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return points;
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}
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public class ArrowLineConfig {
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public int ArrowWidth { get; set; } = 20;
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public int ArrowHeight { get; set; } = 7;
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@ -163,7 +163,7 @@ namespace Ink_Canvas {
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using (DrawingContext dc = DrawingVisualCanvas.DrawingVisual.RenderOpen()) {}
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if (points.Count >= 2)
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MainWindow.inkCanvas.Strokes.Add(MainWindow.DrawShapeCore(points, (MainWindow.ShapeDrawingType)_shapeType));
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MainWindow.inkCanvas.Strokes.Add(MainWindow.DrawShapeCore(points, (MainWindow.ShapeDrawingType)_shapeType,false));
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points.Clear();
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AngleTooltip.Visibility = Visibility.Collapsed;
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LengthTooltip.Visibility = Visibility.Collapsed;
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@ -181,7 +181,7 @@ namespace Ink_Canvas {
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_shapeType == MainWindow.ShapeDrawingType.DottedLine ||
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_shapeType == MainWindow.ShapeDrawingType.ArrowOneSide ||
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_shapeType == MainWindow.ShapeDrawingType.ArrowTwoSide) && points.Count >= 2) {
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MainWindow.DrawShapeCore(points, (MainWindow.ShapeDrawingType)_shapeType).Draw(dc);
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MainWindow.DrawShapeCore(points, (MainWindow.ShapeDrawingType)_shapeType,true).Draw(dc);
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var angle = MainWindow.ShapeDrawingHelper.CaculateRotateAngleByGivenTwoPoints(points[0], points[1]);
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if (AngleTooltip.Visibility == Visibility.Collapsed) AngleTooltip.Visibility = Visibility.Visible;
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AngleText.Text = $"{angle}°";
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