protected override void DrawCore(DrawingContext drawingContext, DrawingAttributes drawingAttributes)
{
if (drawingContext == null)
{
throw new ArgumentNullException("drawingContext");
}
if (null == drawingAttributes)
{
throw new ArgumentNullException("drawingAttributes");
}
Pen pen = new Pen
{
StartLineCap = PenLineCap.Round,
EndLineCap = PenLineCap.Round,
Brush = new SolidColorBrush(drawingAttributes.Color),
Thickness = drawingAttributes.Width
};
BrushConverter bc = new BrushConverter();
Brush BackGround = (Brush)bc.ConvertFromString(drawingAttributes.GetPropertyData(DrawAttributesGuid.BackgroundColor).ToString());
GeometryConverter gc = new GeometryConverter();
Geometry geometry = (Geometry)gc.ConvertFromString(string.Format("M {0},{1} {2},{3} {4},{5} Z", StylusPoints[0].X, StylusPoints[1].Y, (Math.Abs(StylusPoints[1].X - StylusPoints[0].X))/2 + StylusPoints[0].X, StylusPoints[0].Y, StylusPoints[1].X, StylusPoints[1].Y));
GeometryDrawing gd = new GeometryDrawing(BackGround, pen, geometry);
drawingContext.DrawDrawing(gd);
}
public void NewMethod()
{
//#region create method 1
//Path path = new Path();
//PathGeometry pathGeometry = new PathGeometry();
//PathFigure pathFigure = new PathFigure();
//pathFigure.StartPoint = new Point(400, 300);
//PathSegmentCollection segmentCollection = new PathSegmentCollection();
//segmentCollection.Add(new LineSegment() { Point = new Point(600, 100) });
//pathFigure.Segments = segmentCollection;
//pathGeometry.Figures = new PathFigureCollection() { pathFigure };
//path.Data = pathGeometry;
//path.Stroke = new SolidColorBrush(Colors.BlueViolet);
//path.StrokeThickness = 3;
//main.Children.Add(path);
//#endregion
//#region create method2
//Path pp = new Path();
//pp.Stroke = new SolidColorBrush(Colors.Blue);
//pp.StrokeThickness = 3;
//StreamGeometry geometry = new StreamGeometry();
//geometry.FillRule = FillRule.Nonzero; //声前F0还是F1,现在是F1
//using (StreamGeometryContext ctx = geometry.Open())
//{
// ctx.BeginFigure(new Point(30, 60), true, true);
// ctx.LineTo(new Point(150, 600), true, false);
//}
//geometry.Freeze();
//pp.Data = geometry;
//main.Children.Add(pp);
//#endregion
#region create method3
Path pp3 = new Path();
//pp3.Data
pp3.Stroke = new SolidColorBrush(Colors.Red);
pp3.StrokeThickness = 3;
GeometryConverter gc = new GeometryConverter();
pp3.Data = (Geometry)gc.ConvertFromString("M 20,30 500,100");
main.Children.Add(pp3);
#endregion
}