如何动态绘制windows中的扇区(四分之一圈)？
提问于 2014-01-27 00:01:00
我想像在图像中那样画形状。
我已经画了半圆使用弧段，现在我想画四分之一圆，或A扇形，但我不能画它。
我用这段代码画弧，我试着改变大小，角度也不起作用。
我该怎么画四分之一圈/扇区?？我用来绘制圆弧的代码是：
PathFigure pthFigure1 = new PathFigure();
pthFigure1.StartPoint = new Point(50, 60);// starting cordinates of arcs
ArcSegment arcSeg1 = new ArcSegment();
arcSeg1.Point = new Point(100, 82); // ending cordinates of arcs
arcSeg1.Size = new Size(10, 10);
arcSeg1.IsLargeArc = false;
arcSeg1.SweepDirection = SweepDirection.Clockwise;
arcSeg1.RotationAngle = 90;
PathSegmentCollection myPathSegmentCollection1 = new PathSegmentCollection();
myPathSegmentCollection1.Add(arcSeg1);
pthFigure1.Segments = myPathSegmentCollection1;
PathFigureCollection pthFigureCollection1 = new PathFigureCollection();
pthFigureCollection1.Add(pthFigure1);
PathGeometry pthGeometry1 = new PathGeometry();
pthGeometry1.Figures = pthFigureCollection1;
System.Windows.Shapes.Path arcPath1 = new System.Windows.Shapes.Path();
arcPath1.Data = pthGeometry1;
arcPath1.Fill = new SolidColorBrush(Color.FromArgb(255, 255, 23, 0));
this.LayoutRoot.Children.Add(arcPath1);
回答 1
Stack Overflow用户
回答已采纳
发布于 2014-01-28 01:23:40
对代码进行最小的更改(/**/表示更改或添加行)。
PathFigure pthFigure1 = new PathFigure();
/**/ pthFigure1.StartPoint = new Point(0, 100);// starting cordinates of arcs
ArcSegment arcSeg1 = new ArcSegment();
/**/ arcSeg1.Point = new Point(100, 0); // ending cordinates of arcs
/**/ arcSeg1.Size = new Size(100, 100);
arcSeg1.IsLargeArc = false;
arcSeg1.SweepDirection = SweepDirection.Clockwise;
/**/ LineSegment lineSeg = new LineSegment();
/**/ lineSeg.Point = new Point(100,100);
PathSegmentCollection myPathSegmentCollection1 = new PathSegmentCollection();
myPathSegmentCollection1.Add(arcSeg1);
/**/ myPathSegmentCollection1.Add(lineSeg);
pthFigure1.Segments = myPathSegmentCollection1;
PathFigureCollection pthFigureCollection1 = new PathFigureCollection();
pthFigureCollection1.Add(pthFigure1);
...你似乎曲解了ArcSegment.RotationAngle的含义。
它的数学：
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原文链接：
https://stackoverflow.com/questions/21375639
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