using System;
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using System.Globalization;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Input;
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using System.Windows.Media;
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namespace XHandler.Controls.DrawCanvas
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{
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/// <summary>
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/// 椭圆
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/// </summary>
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public sealed class EllipseDrawTool : DrawGeometryBase
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{
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public EllipseDrawTool(DrawingCanvas drawingCanvas) : base(drawingCanvas)
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{
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this.DrawingToolType = DrawToolType.Ellipse;
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// 准备要处理的事件
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this.CanTouchDown = true;
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}
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#region 鼠标键盘事件
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public override Boolean OnKeyDown(Key key)
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{
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if (key != Key.LeftShift || !bottomRight.HasValue)
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return false;
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return OnTouchMove(bottomRight.Value);
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}
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public override Boolean OnKeyUp(Key key)
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{
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if (key != Key.LeftShift || !bottomRight.HasValue)
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return false;
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return OnTouchMove(bottomRight.Value);
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}
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public override Boolean OnTouchLeave(Point point)
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{
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//if (!bottomRight.HasValue)
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// this.drawingCanvas.DeleteVisual(this);
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//else
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{
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Point centerPoint = new Point(point.X, point.Y);
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center = centerPoint;
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PathFigure myPathFigure = new PathFigure();//画第一条直线
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myPathFigure.StartPoint = new Point(point.X - 30, point.Y);
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LineSegment myLineSegment = new LineSegment();
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myLineSegment.Point = new Point(point.X + 30, point.Y);
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PathSegmentCollection myPathSegmentCollection = new PathSegmentCollection();
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myPathSegmentCollection.Add(myLineSegment);
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myPathFigure.Segments = myPathSegmentCollection;
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PathFigure myPathFigure2 = new PathFigure();//画第二条直线
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myPathFigure2.StartPoint = new Point(point.X, point.Y - 30);
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LineSegment myLineSegment2 = new LineSegment();
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myLineSegment2.Point = new Point(point.X, point.Y + 30);
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PathSegmentCollection myPathSegmentCollection2 = new PathSegmentCollection();
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myPathSegmentCollection2.Add(myLineSegment2);
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myPathFigure2.Segments = myPathSegmentCollection2;
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PathFigureCollection myPathFigureCollection = new PathFigureCollection();
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myPathFigureCollection.Add(myPathFigure);//添加画的线段
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myPathFigureCollection.Add(myPathFigure2);
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pathGeometry.Figures = myPathFigureCollection;
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FormattedText text = new FormattedText(this.ID.ToString(), CultureInfo.CurrentCulture, FlowDirection.LeftToRight, new Typeface("宋体"), 60, Brushes.Black);
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Geometry textGeometry = text.BuildGeometry(new Point(point.X + 40, point.Y - 40));
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GeometryGroup geometryGroup = new GeometryGroup();
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geometryGroup.Children.Add(geometry);
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geometryGroup.Children.Add(textGeometry);
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//geometry = geometry.GetFlattenedPathGeometry();
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geometry = geometryGroup.GetFlattenedPathGeometry();
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Draw();
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DrawingCanvas.ID++;
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nIndex++;
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}
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this.DrawingCanvas.DeleteWorkingDrawTool(this);
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this.IsFinish = true;
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this.CanTouchDown = false;
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this.CanTouchMove = false;
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this.CanTouchLeave = false;
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this.CanKeyDown = false;
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this.CanKeyUp = false;
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if (this.TouchId == 0 && this.DrawingCanvas.IsMouseCaptured)
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this.DrawingCanvas.ReleaseMouseCapture();
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return true;
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}
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public override Boolean OnTouchDown(Int32 touchId, Point point)
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{
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this.TouchId = touchId;
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// if (!topLeft.HasValue)
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{
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this.DrawingCanvas.AddWorkingDrawTool(this);
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this.pen = this.DrawingCanvas.Pen;
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topLeft = point;
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this.geometry = new PathGeometry();
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//var figure = new PathFigure { IsClosed = true };
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//pathGeometry.Figures.Add(figure);
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this.CanTouchMove = false;
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this.CanKeyDown = false;
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this.CanKeyUp = false;
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this.CanTouchUp = true;
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//if (this.TouchId != 0 || !this.drawingCanvas.CaptureMouse())
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this.CanTouchLeave = true;
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this.DrawingCanvas.AddVisual(this);
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}
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//else
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//return OnTouchLeave(point);
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return true;
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}
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public override Boolean OnTouchMove(Point point)
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{
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var dc = this.RenderOpen();
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var startPoint = topLeft.Value;
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if (Keyboard.IsKeyDown(Key.LeftShift))
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{
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var len = Math.Min(Math.Abs(point.X - startPoint.X), Math.Abs(point.Y - startPoint.Y));
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point = new Point(startPoint.X + (point.X > startPoint.X ? len : -len), startPoint.Y + (point.Y > startPoint.Y ? len : -len));
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}
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if ((startPoint - point).Length <= pen.Thickness)
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{
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dc.Close();
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return true;
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}
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bottomRight = point;
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radiusX = (point.X - startPoint.X) / 2;
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radiusY = (point.Y - startPoint.Y) / 2;
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Point centerPoint= new Point(startPoint.X + radiusX, startPoint.Y + radiusY);
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center = centerPoint;
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radiusX = Math.Abs(radiusX);
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radiusY = Math.Abs(radiusY);
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dc.DrawEllipse(null, pen, center, radiusX, radiusY);
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dc.Close();
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return true;
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}
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#endregion
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#region 序列化
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public override DrawGeometrySerializerBase ToSerializer()
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{
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var serializer = new DrawEllipseSerializer
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{
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Color = ((SolidColorBrush)pen.Brush).Color,
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StrokeThickness = pen.Thickness,
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Geometry = geometry.ToString()
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};
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if (geometry.Transform != null)
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serializer.Matrix = geometry.Transform.Value;
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return serializer;
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}
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public override void DeserializeFrom(DrawGeometrySerializerBase serializer)
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{
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this.pen = new Pen(new SolidColorBrush(serializer.Color), serializer.StrokeThickness);
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this.geometry = Geometry.Parse(serializer.Geometry).GetFlattenedPathGeometry();
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this.geometry.Transform = new TranslateTransform(serializer.Matrix.OffsetX, serializer.Matrix.OffsetY);
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this.IsFinish = true;
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this.Draw();
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}
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#endregion
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#region 字段
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private Point? topLeft, bottomRight;
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private static int nIndex = 0;
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public Point center { get; set; }
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//public int ID = 1;
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public Double radiusX { get; set; }
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public Double radiusY { get; set; }
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#endregion
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}
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}
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