WPF 使用PathGeometry画时针和分针

来源：互联网发布：吓人软件下载编辑：程序博客网时间：2024/05/03 17:10

// 将角度转为弧度        private double TransOrt2Radian(double fOrt)        {            double fPAI = 3.1415926535;            double fTmp = fOrt + 270;            if (fTmp > 360.0) fTmp -= 360.0;            return (fTmp * fPAI) / (float)180.0;        }        private Point GetPointInCircle(double dCtrx, double dCtry, double dOrt, double dRadius)        {            Point pnt1 = new Point(0, 0);            double dOrt1 = dOrt;            if (dOrt > 360.0) dOrt -= 360.0;            pnt1.X = dCtrx + dRadius * (float)Math.Cos(TransOrt2Radian(dOrt1));            pnt1.Y = dCtry + dRadius * (float)Math.Sin(TransOrt2Radian(dOrt1));            return pnt1;        }        // 根据提供的点获取一个封闭区域        private PathFigure GetLineFigure(Point pt1, Point []pts)        {            PathFigure pgtmp = new PathFigure();            pgtmp.StartPoint = pt1;                        PathSegmentCollection psc = new PathSegmentCollection();            for (int i = 0; i < pts.Count(); i++)            {                Point pnt = pts[i];                LineSegment lg = new LineSegment();                lg.Point = pnt;                psc.Add(lg);            }            pgtmp.Segments = psc;            pgtmp.IsClosed = true;            pgtmp.IsFilled = true;            return pgtmp;        }        // 根据半径和中心点获取指针区域        private PathFigure GetTimePointer(double dCtrx, double dCtry,             double dRadius1, double dRadius2, double dRadius, double dOrt)        {            // 计算区域的四个点            Point pnt1 = GetPointInCircle(dCtrx, dCtry, dOrt + 180, dRadius1);            Point pnt2 = GetPointInCircle(dCtrx, dCtry, dOrt + 70, dRadius2);            Point pnt3 = GetPointInCircle(dCtrx, dCtry, dOrt - 70, dRadius2);            Point pnt4 = GetPointInCircle(dCtrx, dCtry, dOrt, dRadius);            PathFigure pgtmp = GetLineFigure(pnt1, new Point[3] { pnt2, pnt4, pnt3 });            return pgtmp;        }

private void DrawTimePointer(DrawingContext dc)        {            if (ActualWidth < 30) return;            double dCtrx = ActualWidth / 2;            double dCtry = ActualHeight / 2;            // 时针长度            double dHourRadius = ActualWidth * 7 / 20;            double dHourRadius1 = ActualWidth * 3 / 40;            double dHourRadius2 = ActualWidth / 20;            // 时针角度            double dOrt = 90.0;            // 分针长度            double dMinRadius = ActualWidth * 2 / 5;            double dMinRadius1 = ActualWidth *3 / 40;            double dMinRadius2 = dMinRadius1 / 2;            // 分针角度            double dMinOrt = 21;            // 计算区域            PathGeometry pg = new PathGeometry();            PathFigure pgtmp = GetTimePointer(dCtrx, dCtry, dHourRadius1, dHourRadius2, dHourRadius, dOrt);            pg.Figures.Add(pgtmp);            pg.Freeze();            dc.DrawGeometry(Brushes.Blue, new Pen(Brushes.Blue, 1.0), pg);            PathGeometry pg2 = new PathGeometry();            PathFigure pgtmp2 = GetTimePointer(dCtrx, dCtry, dMinRadius1, dMinRadius2, dMinRadius, dMinOrt);            pg2.Figures.Add(pgtmp2);            pg2.Freeze();            dc.DrawGeometry(Brushes.Yellow, new Pen(Brushes.Green, 1.0), pg2);        }

效果如图：

0 0