WPF 图形绘制 及各种线帽、箭头的实现
///
/// 矩形类
///
public sealed class CRectangle : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
//因为线宽的不同会导致区域显示不全，因此在计算时需考虑线宽
Point ptStart = new Point(this.StrokeThickness / 2, this.StrokeThickness / 2);
Point pt2 = new Point(this.Width - this.StrokeThickness / 2, this.StrokeThickness / 2);
Point pt3 = new Point(this.Width - this.StrokeThickness / 2, this.Height - this.StrokeThickness / 2);
Point pt4 = new Point(this.StrokeThickness / 2, this.Height - this.StrokeThickness / 2);
Point ptEnd = new Point(this.StrokeThickness / 2, 0);
context.BeginFigure(ptStart, true, false);
context.LineTo(pt2, true, true);
context.LineTo(pt3, true, true);
context.LineTo(pt4, true, true);
context.LineTo(ptEnd, true, true);
}
#endregion
}
///
/// 椭圆类
///
public sealed class CEllipse : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
//因为线宽的不同会导致区域显示不全，因此在计算时需考虑线宽
double w = this.Width - this.StrokeThickness * 2;
double h = this.Height - this.StrokeThickness * 2;
if (w > 0 && h > 0)
{
Point pt = new Point(w / 2 + this.StrokeThickness, this.StrokeThickness);
context.BeginFigure(pt, true, true);
context.ArcTo(new Point(w / 2 + this.StrokeThickness, h + this.StrokeThickness), new Size(w / 2, h / 2), 0, true, SweepDirection.Counterclockwise, true, true);
context.ArcTo(pt, new Size(w / 2, h / 2), 0, true, SweepDirection.Counterclockwise, true, true);
}
}
#endregion
}
///
/// 直线类
///
public sealed class CLine : VtShape
{
#region Dependency Properties
public static readonly DependencyProperty X1Property = DependencyProperty.Register("X1", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
public static readonly DependencyProperty Y1Property = DependencyProperty.Register("Y1", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
public static readonly DependencyProperty X2Property = DependencyProperty.Register("X2", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
public static readonly DependencyProperty Y2Property = DependencyProperty.Register("Y2", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
#endregion
#region CLR Properties
[TypeConverter(typeof(LengthConverter))]
public double X1
{
get { return (double)base.GetValue(X1Property); }
set { base.SetValue(X1Property, value); }
}
[TypeConverter(typeof(LengthConverter))]
public double Y1
{
get { return (double)base.GetValue(Y1Property); }
set { base.SetValue(Y1Property, value); }
}
[TypeConverter(typeof(LengthConverter))]
public double X2
{
get { return (double)base.GetValue(X2Property); }
set { base.SetValue(X2Property, value); }
}
[TypeConverter(typeof(LengthConverter))]
public double Y2
{
get { return (double)base.GetValue(Y2Property); }
set { base.SetValue(Y2Property, value); }
}
#endregion
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
public CLine(Canvas linePanel)
{
_panel = linePanel;
_panel.Children.Add(_arrow.lineCap_start);
_panel.Children.Add(_arrow.lineCap_end);
}
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
double theta = Math.Atan2(Y1 - Y2, X1 - X2);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
Point pt1 = new Point(X1, this.Y1);
Point pt2 = new Point(X2, this.Y2);
Point pt3 = new Point(
X2 + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
Y2 + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost));
Point pt4 = new Point(
X2 + (_arrow.HeadWidth * cost + _arrow.HeadHeight * sint),
Y2 - (_arrow.HeadHeight * cost - _arrow.HeadWidth * sint));
Point pt5 = new Point(
X1 - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
Y1 - (_arrow.TailWidth * sint + _arrow.TailHeight * cost));
Point pt6 = new Point(
X1 - (_arrow.TailWidth * cost + _arrow.TailHeight * sint),
Y1 + (_arrow.TailHeight * cost - _arrow.TailWidth * sint));
//this.StrokeStartLineCap = PenLineCap.Triangle;
//this.StrokeEndLineCap = PenLineCap.Triangle;
//lineCap_start = new Polygon();
PointCollection pts_start = new PointCollection();
pts_start.Add(pt5);
pts_start.Add(pt1);
pts_start.Add(pt6);
PointCollection pts_end = new PointCollection();
pts_end.Add(pt3);
pts_end.Add(pt2);
pts_end.Add(pt4);
SetLineCap( pt1, pt2, pt1, pt2);//设置线帽
context.BeginFigure(pt1, false, false);
//context.LineTo(pt5, true, true);
//context.LineTo(pt1, true, true);
//context.LineTo(pt6, true, true);
//context.LineTo(pt1, true, true);
//绘制第一个点的线帽
context.LineTo(pt2, true, true);//绘制直线
//context.LineTo(pt3, true, true);
//context.LineTo(pt2, true, true);
//context.LineTo(pt4, true, true);
//绘制第二个点的线帽
}
#endregion
}
///
/// 右直角三角形类
///
public sealed class CRightTriangle : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
double angle = Math.Atan(this.Height / (this.Width / 2));
double offsetTop = this.StrokeThickness / Math.Cos(angle);
double offsetLeft = this.StrokeThickness / Math.Tan(angle) + this.StrokeThickness / Math.Sign(angle);
Point pt1 = new Point(this.Width - offsetLeft, 0);
Point pt2 = new Point(0, this.Height - this.StrokeThickness);
Point pt3 = new Point(this.Width - offsetLeft, this.Height - this.StrokeThickness);
context.BeginFigure(pt1, true, true);
context.LineTo(pt2, true, true);
context.LineTo(pt3, true, true);
context.LineTo(pt1, true, true);
}
#endregion
}
///
/// 左直角三角形类
///
public sealed class CLeftTriangle : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
double angle = Math.Atan(this.Height / (this.Width / 2));
double offsetTop = this.StrokeThickness / Math.Cos(angle);
double offsetLeft = this.StrokeThickness / Math.Tan(angle) + this.StrokeThickness / Math.Sign(angle);
Point pt1 = new Point(0, 0);
Point pt2 = new Point(0, this.Height - this.StrokeThickness);
Point pt3 = new Point(this.Width - offsetLeft, this.Height - this.StrokeThickness);
context.BeginFigure(pt1, true, true);
context.LineTo(pt2, true, true);
context.LineTo(pt3, true, true);
context.LineTo(pt1, true, true);
}
#endregion
}
///
/// 等腰三角形类
///
public sealed class CTriangle : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
double angle = Math.Atan(this.Height / (this.Width / 2));
double offsetTop = this.StrokeThickness / Math.Cos(angle);
double offsetLeft = this.StrokeThickness / Math.Tan(angle) + this.StrokeThickness / Math.Sign(angle);
Point pt1 = new Point(this.Width / 2, this.StrokeThickness);
Point pt2 = new Point(offsetLeft, this.Height - this.StrokeThickness);
Point pt3 = new Point(this.Width - offsetLeft, this.Height - this.StrokeThickness);
context.BeginFigure(pt1, true, true);
context.LineTo(pt2, true, true);
context.LineTo(pt3, true, true);
context.LineTo(pt1, true, true);
}
#endregion
}
///
/// 菱形类
///
public sealed class CDiamond : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
double angle = Math.Atan(this.Height / (this.Width / 2));
Point pt1 = new Point(this.Width / 2, this.StrokeThickness);
Point pt2 = new Point(this.StrokeThickness, this.Height /2);
Point pt3 = new Point(this.Width / 2, this.Height - this.StrokeThickness);
Point pt4 = new Point(this.Width - this.StrokeThickness, this.Height / 2);
context.BeginFigure(pt1, true, true);
context.LineTo(pt1, true, true);
context.LineTo(pt2, true, true);
context.LineTo(pt3, true, true);
context.LineTo(pt4, true, true);
}
#endregion
}
///
/// 菱形类
///
public sealed class CFiveStar : VtShape
{
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private Point Intersection(Point pt1, Point pt2, Point pt3, Point pt4)
{
double A1 = pt1.Y - pt2.Y;
double B1 = pt2.X - pt1.X;
double C1 = pt1.Y * (pt2.X - pt1.X) - pt1.X * (pt2.Y - pt1.Y);
double A2 = pt3.Y - pt4.Y, B2 = pt4.X - pt3.X, C2 = pt3.Y * (pt4.X - pt3.X) - pt3.X * (pt4.Y - pt3.Y);
//A1 * x + B1 * y = C1
//A2 * x + B2 * y = C2
double D = A1 * B2 - B1 * A2, Dx = C1 * B2 - B1 * C2, Dy = A1 * C2 - A2 * C1;
double x = Dx / (double)D, y = Dy / (double)D;
return new Point((int)x, (int)y);
}
private Point RotateTheta(Point pt,Point center,double theta)
{
double x = center.X + (pt.X - center.X) * Math.Cos((theta * Math.PI / 180)) - (pt.Y - center.Y) * Math.Sin((theta * Math.PI / 180));
double y = center.Y + (pt.X - center.X) * Math.Sin((theta * Math.PI / 180)) + (pt.Y - center.Y) * Math.Cos((theta * Math.PI / 180));
return new Point(x, y);
}
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
Point ptCenter = new Point(this.Width / 2, this.Height / 2);
double radius = this.Width / 2;
Point[] pts = new Point[10];
pts[0] = new Point(ptCenter.X, (int)(ptCenter.Y - radius ));
for (int i = 1; i < 5; i++)
{
pts[2 * i] = RotateTheta(pts[2 * (i - 1)], ptCenter, 72.0);
pts[2 * i].X = (int)(ptCenter.X + (pts[2 * i].X - ptCenter.X) );
pts[2 * i].Y = (int)(ptCenter.Y + (pts[2 * i].Y - ptCenter.Y) );
}
//通过直线求交点的方式来取得1,3,5,7,9点坐标
pts[1] = Intersection(pts[0], pts[4], pts[2], pts[8]);
pts[3] = Intersection(pts[0], pts[4], pts[2], pts[6]);
pts[5] = Intersection(pts[2], pts[6], pts[4], pts[8]);
pts[7] = Intersection(pts[0], pts[6], pts[4], pts[8]);
pts[9] = Intersection(pts[0], pts[6], pts[2], pts[8]);
context.BeginFigure(pts[0], true, true);
context.LineTo(pts[1], true, true);
context.LineTo(pts[2], true, true);
context.LineTo(pts[3], true, true);
context.LineTo(pts[4], true, true);
context.LineTo(pts[5], true, true);
context.LineTo(pts[6], true, true);
context.LineTo(pts[7], true, true);
context.LineTo(pts[8], true, true);
context.LineTo(pts[9], true, true);
}
#endregion
}
///
/// 三次贝塞尔曲线类
///
public sealed class CBezierCurve : VtShape
{
#region Dependency Properties
//public static readonly DependencyProperty X1Property = DependencyProperty.Register("X1", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
//public static readonly DependencyProperty Y1Property = DependencyProperty.Register("Y1", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
//public static readonly DependencyProperty X2Property = DependencyProperty.Register("X2", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
//public static readonly DependencyProperty Y2Property = DependencyProperty.Register("Y2", typeof(double), typeof(CLine), new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
public static readonly DependencyProperty BezierPointsProperty = DependencyProperty.Register("BezierPoints", typeof(List
//public static readonly DependencyProperty BezierTmpPointProperty = DependencyProperty.Register("BezierTmpPoint", typeof(Point), typeof(CBezierCurve), new FrameworkPropertyMetadata(new Point(0,0), FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
#endregion
#region CLR Properties
[TypeConverter(typeof(double))]
public List
{
get { return (List
set { BezierPoints.Clear(); base.SetValue(BezierPointsProperty, value); }
}
//[TypeConverter(typeof(double))]
//public Point BezierTmpPoint
//{
// get { return (Point)base.GetValue(BezierTmpPointProperty); }
// set { base.SetValue(BezierTmpPointProperty, value); }
//}
#endregion
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
using (StreamGeometryContext context = geometry.Open())
{
InternalDrawArrowGeometry(context);
}
// Freeze the geometry for performance benefits
geometry.Freeze();
return geometry;
}
}
#endregion
#region Privates
private List
public bool _bDrawing = false;//是否正在绘制
public Point BezierTmpPoint = new Point(0, 0);
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
_lstCtrPoints.Clear();
List
List
foreach (Point pt in BezierPoints)
{
lstPoints.Add(new Point(pt.X, pt.Y));
}
if (_bDrawing == true && (BezierTmpPoint.X > 0 || BezierTmpPoint.Y > 0))
{
lstPoints.Add(new Point(BezierTmpPoint.X, BezierTmpPoint.Y));
for (int i = 0; i < lstPoints.Count; i++)
{
lstCtrPoints.AddRange(Control1(lstPoints, i));
if (i < lstPoints.Count - 1)
{
_lstCtrPoints.AddRange(Control1(lstPoints, i));
}
}
}
else if (_bDrawing == false)
{
for (int i = 0; i < lstPoints.Count; i++)
{
lstCtrPoints.AddRange(Control1(lstPoints, i));
_lstCtrPoints.AddRange(Control1(lstPoints, i));
}
}
if (lstPoints != null && lstPoints.Count > 1)
{
Point ptStart = lstPoints[0];
Point ptEnd = lstPoints[lstPoints.Count - 1];
//先绘制开始线帽
SetLineCap(lstPoints[lstPoints.Count - 2], ptEnd, ptStart, lstPoints[1]);
context.BeginFigure(ptStart, true, false);
//再绘制曲线
for (int i = 1; i < lstPoints.Count; i++)
{
context.BezierTo(lstCtrPoints[i * 2 - 1], lstCtrPoints[i * 2], lstPoints[i], true, true);
}
}
}
private List
{
List
point.Add(new Point());
point.Add(new Point());
if (n == 0)
{
point[0] = list[0];
}
else
{
point[0] = Average(list[n - 1], list[n]);
}
if (n == list.Count - 1)
{
point[1] = list[list.Count - 1];
}
else
{
point[1] = Average(list[n], list[n + 1]);
}
Point ave = Average(point[0], point[1]);
Point sh = Sub(list[n], ave);
point[0] = Mul(Add(point[0], sh), list[n], 0.6);
point[1] = Mul(Add(point[1], sh), list[n], 0.6);
return point;
}
private Point Average(Point x, Point y)
{
return new Point((x.X + y.X) / 2, (x.Y + y.Y) / 2);
}
private Point Add(Point x, Point y)
{
return new Point(x.X + y.X, x.Y + y.Y);
}
private Point Sub(Point x, Point y)
{
return new Point(x.X - y.X, x.Y - y.Y);
}
private Point Mul(Point x, Point y, double d)
{
Point temp = Sub(x, y);
temp = new Point(temp.X * d, temp.Y * d);
temp = Add(y, temp);
return temp;
}
#endregion
#region Public
public CBezierCurve(Canvas linePanel)
{
_panel = linePanel;
_panel.Children.Add(_arrow.lineCap_start);
_panel.Children.Add(_arrow.lineCap_end);
}
public void GetVectorRect(ref Point TopLeft, ref Point BottomRight)
{
if (BezierPoints.Count > 0)
{
TopLeft.X = BezierPoints[0].X;
TopLeft.Y = BezierPoints[0].Y;
BottomRight.X = BezierPoints[0].X;
BottomRight.Y = BezierPoints[0].Y;
#region 曲线顶点
foreach (Point pt in BezierPoints)
{
if (pt.X < TopLeft.X)
{
TopLeft.X = pt.X;
}
if (pt.Y < TopLeft.Y)
{
TopLeft.Y = pt.Y;
}
if (pt.X > BottomRight.X)
{
BottomRight.X = pt.X;
}
if (pt.Y > BottomRight.Y)
{
BottomRight.Y = pt.Y;
}
}
#endregion
#region 曲线控制点
foreach (Point pt in _lstCtrPoints)
{
if (pt.X < TopLeft.X)
{
TopLeft.X = pt.X;
}
if (pt.Y < TopLeft.Y)
{
TopLeft.Y = pt.Y;
}
if (pt.X > BottomRight.X)
{
BottomRight.X = pt.X;
}
if (pt.Y > BottomRight.Y)
{
BottomRight.Y = pt.Y;
}
}
#endregion
}
}
public void Clear()
{
if (BezierPoints.Count > 0)
{
BezierPoints.Clear();
}
if (_lstCtrPoints.Count > 0)
{
_lstCtrPoints.Clear();
}
}
#endregion
}
///
/// 线帽样式
///
public enum EnumArrowStyle
{
NULL = 0,
STYLE1 = 1,
STYLE2 = 2,
STYLE3 = 3,
STYLE4 = 4,
STYLE5 = 5,
STYLE6 = 6,
STYLE7 = 7,
STYLE8 = 8,
STYLE9 = 9,
STYLE10 = 10,
STYLE11 = 11,
STYLE12 = 12
}
///
/// 线型样式
///
public enum EnumDottedStyle
{
NULL = 0,
STYLE1 = 1,
STYLE2 = 2,
STYLE3 = 3,
STYLE4 = 4,
STYLE5 = 5
}
///
/// 形状类，为形状设置线型、线帽
///
public class VtShape : Shape
{
#region Arrow Style
public struct Arrow
{
public double HeadWidth;
public double HeadHeight;
public double TailWidth;
public double TailHeight;
public Polygon lineCap_start;
public Polygon lineCap_end;
public Arrow(double _headWidth, double _headHeight, double _tailWidth, double _tailHeight, Polygon lineCapstart, Polygon lineCapend)
{
HeadWidth = _headWidth;
HeadHeight = _headHeight;
TailWidth = _tailWidth;
TailHeight = _tailHeight;
lineCap_start = lineCapstart;
lineCap_end = lineCapend;
}
}
protected Arrow _arrow = new Arrow(0, 0, 0, 0, new Polygon(), new Polygon());
public static readonly DependencyProperty ArrowStyleProperty = DependencyProperty.Register("ArrowStyle", typeof(EnumArrowStyle), typeof(VtShape), new FrameworkPropertyMetadata(EnumArrowStyle.NULL, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure));
protected Canvas _panel = null;
[TypeConverter(typeof(EnumArrowStyle))]
public EnumArrowStyle ArrowStyle
{
get { return (EnumArrowStyle)base.GetValue(ArrowStyleProperty); }
set
{
base.SetValue(ArrowStyleProperty, value);
#region 设置箭头大小
switch (ArrowStyle)
{
case EnumArrowStyle.NULL:
_arrow.HeadWidth = 0; _arrow.HeadHeight = 0; _arrow.TailWidth = 0; _arrow.TailHeight = 0;
break;
case EnumArrowStyle.STYLE1:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 0; _arrow.TailHeight = 0;
break;
case EnumArrowStyle.STYLE2:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 0; _arrow.TailHeight = 0;
break;
case EnumArrowStyle.STYLE3:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 0; _arrow.TailHeight = 0;
break;
case EnumArrowStyle.STYLE4:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 0; _arrow.TailHeight = 0;
break;
case EnumArrowStyle.STYLE5:
_arrow.HeadWidth = 0; _arrow.HeadHeight = 0; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE6:
_arrow.HeadWidth = 0; _arrow.HeadHeight = 0; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE7:
_arrow.HeadWidth = 0; _arrow.HeadHeight = 0; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE8:
_arrow.HeadWidth = 0; _arrow.HeadHeight = 0; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE9:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE10:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE11:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
case EnumArrowStyle.STYLE12:
_arrow.HeadWidth = 30; _arrow.HeadHeight = 20; _arrow.TailWidth = 30; _arrow.TailHeight = 20;
break;
}
#endregion
}
}
protected enum LineCapType
{
LineCap_Start =0,
LineCap_End =1
}
protected void SetLineCap( Point pt1_start, Point pt1_end,Point pt2_start, Point pt2_end)
{
_arrow.lineCap_start.Points = new PointCollection ();
_arrow.lineCap_end.Points = new PointCollection ();
_arrow.lineCap_start.Fill = ((Polygon)_arrow.lineCap_start).Stroke = this.Stroke; // Brushes.Yellow;
_arrow.lineCap_end.Fill = ((Polygon)_arrow.lineCap_end).Stroke = this.Stroke;//= Brushes.Yellow;
_arrow.lineCap_start.StrokeThickness = _arrow.lineCap_end.StrokeThickness = this.StrokeThickness;
switch (ArrowStyle)
{
case EnumArrowStyle.NULL:
break;
case EnumArrowStyle.STYLE1:
SetTriangle2Cap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE2:
SetTriangleCap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE3:
SetRectCap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE4:
SetTriangle3Cap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE5:
SetTriangle2Cap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE6:
SetTriangleCap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE7:
SetRectCap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE8:
SetTriangle3Cap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE9:
SetTriangle2Cap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
SetTriangle2Cap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE10:
SetTriangleCap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
SetTriangleCap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE11:
SetRectCap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
SetRectCap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
case EnumArrowStyle.STYLE12:
SetTriangle3Cap(LineCapType.LineCap_End, pt1_start, pt1_end, _arrow.lineCap_start, _arrow.lineCap_end);
SetTriangle3Cap(LineCapType.LineCap_Start, pt2_start, pt2_end, _arrow.lineCap_start, _arrow.lineCap_end);
break;
}
}
///
/// 封闭的三角形线帽
///
///
///
///
///
private void SetTriangleCap(LineCapType lineCapType, Point pt_start, Point pt_end, Polygon cap_start, Polygon cap_end)
{
double theta = Math.Atan2(pt_start.Y - pt_end.Y, pt_start.X - pt_end.X);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
if (lineCapType == LineCapType.LineCap_Start )
{
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
cap_start.Points.Add(new Point(pt_start.X + 20 * cost, pt_start.Y + 20 * sint));
cap_start.Points.Add( new Point(
pt_start.X - (_arrow.TailWidth * cost + _arrow.TailHeight * sint),
pt_start.Y + (_arrow.TailHeight * cost - _arrow.TailWidth * sint))
);
}
if (lineCapType == LineCapType.LineCap_End)
{
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
cap_end.Points.Add(new Point(pt_end.X - 20 * cost, pt_end.Y - 20 * sint));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost + _arrow.HeadHeight * sint),
pt_end.Y - (_arrow.HeadHeight * cost - _arrow.HeadWidth * sint))
);
}
}
///
/// 非封闭的三角形线帽
///
/// 端点1
/// 端点2
/// 端点1形状
/// 端点2形状
private void SetTriangle2Cap(LineCapType lineCapType, Point pt_start, Point pt_end, Polygon cap_start, Polygon cap_end)
{
double theta = Math.Atan2(pt_start.Y - pt_end.Y, pt_start.X - pt_end.X);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
if (lineCapType == LineCapType.LineCap_Start)
{
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
cap_start.Points.Add(new Point(pt_start.X + 20 * cost, pt_start.Y + 20 * sint));
cap_start.Points.Add(new Point(
pt_start.X - (_arrow.TailWidth * cost + _arrow.TailHeight * sint),
pt_start.Y + (_arrow.TailHeight * cost - _arrow.TailWidth * sint))
);
cap_start.Points.Add(new Point(pt_start.X - 5 * cost, pt_start.Y - 5 * sint));
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
}
if (lineCapType == LineCapType.LineCap_End)
{
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
cap_end.Points.Add(new Point(pt_end.X , pt_end.Y ));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost + _arrow.HeadHeight * sint),
pt_end.Y - (_arrow.HeadHeight * cost - _arrow.HeadWidth * sint))
);
cap_end.Points.Add(new Point(pt_end.X - 25 * cost, pt_end.Y - 25 * sint));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
}
}
///
/// 非封闭的三角形线帽
///
/// 端点1
/// 端点2
/// 端点1形状
/// 端点2形状
private void SetTriangle3Cap(LineCapType lineCapType, Point pt_start, Point pt_end, Polygon cap_start, Polygon cap_end)
{
double theta = Math.Atan2(pt_start.Y - pt_end.Y, pt_start.X - pt_end.X);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
if (lineCapType == LineCapType.LineCap_Start)
{
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
cap_start.Points.Add(new Point(pt_start.X, pt_start.Y));
cap_start.Points.Add(new Point(
pt_start.X - (_arrow.TailWidth * cost + _arrow.TailHeight * sint),
pt_start.Y + (_arrow.TailHeight * cost - _arrow.TailWidth * sint))
);
cap_start.Points.Add(new Point(pt_start.X - 1 * cost, pt_start.Y - 1 * sint));
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
}
if (lineCapType == LineCapType.LineCap_End)
{
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
cap_end.Points.Add(new Point(pt_end.X, pt_end.Y));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost + _arrow.HeadHeight * sint),
pt_end.Y - (_arrow.HeadHeight * cost - _arrow.HeadWidth * sint))
);
cap_end.Points.Add(new Point(pt_end.X - 1 * cost, pt_end.Y - 1 * sint));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
}
}
///
/// 封闭矩形线帽
///
/// 端点1
/// 端点2
/// 端点1形状
/// 端点2形状
private void SetRectCap(LineCapType lineCapType, Point pt_start, Point pt_end, Polygon cap_start, Polygon cap_end)
{
double theta = Math.Atan2(pt_start.Y - pt_end.Y, pt_start.X - pt_end.X);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
if (lineCapType == LineCapType.LineCap_Start)
{
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
cap_start.Points.Add(new Point(pt_start.X , pt_start.Y ));
cap_start.Points.Add(new Point(
pt_start.X - (_arrow.TailWidth * cost + _arrow.TailHeight * sint),
pt_start.Y + (_arrow.TailHeight * cost - _arrow.TailWidth * sint))
);
cap_start.Points.Add(new Point(pt_start.X - 60 * cost, pt_start.Y - 60 * sint));
cap_start.Points.Add(
new Point(
pt_start.X - (_arrow.TailWidth * cost - _arrow.TailHeight * sint),
pt_start.Y - (_arrow.TailWidth * sint + _arrow.TailHeight * cost))
);
}
if (lineCapType == LineCapType.LineCap_End)
{
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
cap_end.Points.Add(new Point(pt_end.X + 60 * cost, pt_end.Y + 60 * sint));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost + _arrow.HeadHeight * sint),
pt_end.Y - (_arrow.HeadHeight * cost - _arrow.HeadWidth * sint))
);
cap_end.Points.Add(new Point(pt_end.X, pt_end.Y));
cap_end.Points.Add(
new Point(
pt_end.X + (_arrow.HeadWidth * cost - _arrow.HeadHeight * sint),
pt_end.Y + (_arrow.HeadWidth * sint + _arrow.HeadHeight * cost))
);
}
}
#endregion
#region Dotted Style
private EnumDottedStyle _DottedStyle = EnumDottedStyle.NULL;
public EnumDottedStyle DottedStyle
{
set { _DottedStyle = value; this.StrokeDashArray = SetDottedStyle(_DottedStyle); }
get { return _DottedStyle; }
}
protected DoubleCollection SetDottedStyle(EnumDottedStyle style)
{
DoubleCollection dotted = new DoubleCollection();
if (style == EnumDottedStyle.NULL)
{
dotted = null;
return dotted;
}
if (dotted == null)
{
dotted = new DoubleCollection();
}
dotted.Clear();
switch (style)
{
case EnumDottedStyle.STYLE1:
dotted.Add(3); dotted.Add(1);
break;
case EnumDottedStyle.STYLE2:
dotted.Add(1); dotted.Add(1); dotted.Add(4); dotted.Add(1);
break;
case EnumDottedStyle.STYLE3:
dotted.Add(7); dotted.Add(2);
break;
case EnumDottedStyle.STYLE4:
dotted.Add(5); dotted.Add(1);
break;
case EnumDottedStyle.STYLE5:
dotted.Add(1); dotted.Add(1);
break;
}
return dotted;
}
#endregion
#region Overrides
protected override Geometry DefiningGeometry
{
get
{
// Create a StreamGeometry for describing the shape
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
geometry.Freeze();
return geometry;
}
}
#endregion
}
效果图如下：
