C# Media.GeometryDrawing类代码示例

        void CreateAndAddAdornment(ITextViewLine line, SnapshotSpan span, Brush brush, bool extendToRight)
        {
            var markerGeometry = _view.TextViewLines.GetMarkerGeometry(span);

            double left = 0;
            double width = _view.ViewportWidth + _view.MaxTextRightCoordinate;
            if (markerGeometry != null)
            {
                left = markerGeometry.Bounds.Left;
                if (!extendToRight) width = markerGeometry.Bounds.Width;
            }

            Rect rect = new Rect(left, line.Top, width, line.Height);

            RectangleGeometry geometry = new RectangleGeometry(rect);

            GeometryDrawing drawing = new GeometryDrawing(brush, new Pen(), geometry);
            drawing.Freeze();

            DrawingImage drawingImage = new DrawingImage(drawing);
            drawingImage.Freeze();

            Image image = new Image();
            image.Source = drawingImage;

            Canvas.SetLeft(image, geometry.Bounds.Left);
            Canvas.SetTop(image, geometry.Bounds.Top);

            _layer.AddAdornment(AdornmentPositioningBehavior.TextRelative, span, null, image, null);
        }

        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);
        }

        /// <summary>
        /// Create an Arc geometry drawing of an ellipse or circle
        /// </summary>
        /// <param name="rect">Box to hold the whole ellipse described by the arc</param>
        /// <param name="startDegrees">Start angle of the arc degrees within the ellipse. 0 degrees is a line to the right.</param>
        /// <param name="sweepDegrees">Sweep angle, -ve = Counterclockwise, +ve = Clockwise</param>
        /// <returns>GeometryDrawing object</returns>
        private static GeometryDrawing CreateArcDrawing(Rect rect, double startDegrees, double sweepDegrees)
        {
            // degrees to radians conversion
            double startRadians = startDegrees * Math.PI / 180.0;
            double sweepRadians = sweepDegrees * Math.PI / 180.0;

            // x and y radius
            double dx = rect.Width / 2;
            double dy = rect.Height / 2;

            // determine the start point
            double xs = rect.X + dx + (Math.Cos(startRadians) * dx);
            double ys = rect.Y + dy + (Math.Sin(startRadians) * dy);

            // determine the end point
            double xe = rect.X + dx + (Math.Cos(startRadians + sweepRadians) * dx);
            double ye = rect.Y + dy + (Math.Sin(startRadians + sweepRadians) * dy);

            // draw the arc into a stream geometry
            StreamGeometry streamGeom = new StreamGeometry();
            using (StreamGeometryContext ctx = streamGeom.Open())
            {
                bool isLargeArc = Math.Abs(sweepDegrees) > 180;
                SweepDirection sweepDirection = sweepDegrees < 0 ? SweepDirection.Counterclockwise : SweepDirection.Clockwise;

                ctx.BeginFigure(new Point(xs, ys), false, false);
                ctx.ArcTo(new Point(xe, ye), new Size(dx, dy), 0, isLargeArc, sweepDirection, true, false);
            }

            // create the drawing
            GeometryDrawing drawing = new GeometryDrawing();
            drawing.Geometry = streamGeom;
            return drawing;
        }

 public static Pen CreateErrorPen(Color color)
 {
     var geometry = new StreamGeometry();
     using (var context = geometry.Open())
     {
         context.BeginFigure(new Point(-1, 0), false, false);
         context.PolyLineTo(new[] {
                 new Point(-0.5, 0.4),
                 new Point(0, 0),
                 new Point(0.5, -0.4),
                 new Point(1, 0),
             }, true, true);
     }
     var brushPattern = new GeometryDrawing
     {
         Pen = new Pen(new SolidColorBrush(color), 0.4),
         Geometry = geometry
     };
     var brush = new DrawingBrush(brushPattern)
     {
         TileMode = TileMode.Tile,
         Viewport = new Rect(-1, -1, 2, 2),
         ViewportUnits = BrushMappingMode.Absolute,
         Viewbox = new Rect(-1, -1, 2, 2),
         ViewboxUnits = BrushMappingMode.Absolute,
     };
     var pen = new Pen(brush, 3.0);
     pen.Freeze();
     return pen;
 }

        private Brush CreateARectangleWithDrawingBrush()
        {
            // Create a DrawingBrush
            DrawingBrush blackBrush = new DrawingBrush();
            // Create a Geometry with white background
            GeometryDrawing backgroundSquare =
                new GeometryDrawing(
                    Brushes.DarkGray,
                    null,
                    new RectangleGeometry(new Rect(0, 0, 400, 400)));

            // Create a GeometryGroup that will be added to Geometry
            GeometryGroup gGroup = new GeometryGroup();
            gGroup.Children.Add(new RectangleGeometry(new Rect(0, 0, 200, 200)));
            gGroup.Children.Add(new RectangleGeometry(new Rect(200, 200, 200, 200)));
            // Create a GeomertyDrawing
            GeometryDrawing checkers = new GeometryDrawing(new SolidColorBrush(Colors.Gray), null, gGroup);

            DrawingGroup checkersDrawingGroup = new DrawingGroup();
            checkersDrawingGroup.Children.Add(backgroundSquare);
            checkersDrawingGroup.Children.Add(checkers);

            blackBrush.Drawing = checkersDrawingGroup;

            // Set Viewport and TimeMode
            blackBrush.Viewport = new Rect(0, 0, 0.1, 0.2);
            blackBrush.TileMode = TileMode.Tile;

            return blackBrush;
        }

 private Drawing createDrawingWithFrameRectangleGeometry()
 {
     GeometryDrawing drawing = new GeometryDrawing();
     drawing.Pen = new Pen(Brushes.Black, 1);
     drawing.Geometry = buildFrameRectangle();
     return drawing;
 }

        public MainWindow()
        {
            InitializeComponent();

            drawingGroup = new DrawingGroup();

            // Создаем объект для описания геометрической фигуры
            GeometryDrawing geometryDrawing = new GeometryDrawing();

            // Описываем и сохраняем геометрию квадрата
            RectangleGeometry rectGeometry = new RectangleGeometry();
            rectGeometry.Rect = new Rect(0, 0, 10, 10);
            geometryDrawing.Geometry = rectGeometry;

            // Настраиваем перо и кисть
            geometryDrawing.Pen = new Pen(Brushes.Red, 0.005);// Перо рамки
            geometryDrawing.Brush = Brushes.LightBlue;// Кисть закраски

            // Добавляем готовый слой в контейнер отображения
            drawingGroup.Children.Add(geometryDrawing);

            GeometryDrawing ellipsgeomy = new GeometryDrawing();

            EllipseGeometry elgeometry = new EllipseGeometry(new Point(5, 5), 2, 2);

            ellipsgeomy.Geometry = elgeometry;

            ellipsgeomy.Brush = Brushes.White;

            drawingGroup.Children.Add(ellipsgeomy);
        }

        public void SetFillBrush()
        {
            DrawingGroup rootDrawingGroup = new DrawingGroup();

            GeometryDrawing aDrawing = new GeometryDrawing();
            aDrawing.Brush = Brushes.Gray.CloneCurrentValue();
            aDrawing.Pen = new Pen(Brushes.Gray, 1);
            aDrawing.Brush.Opacity = .5;

            aDrawing.Geometry = Primitives.PolygonLine(WallElementDetails.StartPoint, WallElementDetails.EndPoint, 10, 10);

            rootDrawingGroup.Children.Add(aDrawing);

            //create a transition line
            GeometryDrawing aCenterLine = new GeometryDrawing();
            aCenterLine.Brush = Brushs.WallBoundaryStroke;
            aCenterLine.Pen = Pens.WallBoundaryStroke;

            aCenterLine.Geometry = Primitives.Line(WallElementDetails.StartPoint, WallElementDetails.EndPoint);

            rootDrawingGroup.Children.Add(aCenterLine);

            DrawingBrush brush = new DrawingBrush(rootDrawingGroup);

            this.Fill = brush;
        }

        public AreaSeries2D()
        {
            // 初始化保存数据点的变量
            _points = new SeriesPointCollection();
            _points.CollectionChanged += _points_CollectionChanged;

            // 初始化绘制曲线的画板
            gStream_Line = new StreamGeometry();
            gStream_Area = new StreamGeometry();

            gDrawing_Line = new GeometryDrawing();
            gDrawing_Line.Brush = null;
            gDrawing_Line.Pen = new Pen()
            {
                Thickness = 1,
                Brush = Brushes.Black
            };
            gDrawing_Line.Geometry = gStream_Line;

            /* 初始化绘制填充色的画板 */
            gDrawing_Area = new GeometryDrawing();
            gDrawing_Area.Brush = Brushes.Red;
            gDrawing_Area.Pen = new Pen()
            {
                Thickness = 0,
                Brush = null
            };
            gDrawing_Area.Geometry = gStream_Area;

            /* 生成绘画组 */
            drawingGroup = new DrawingGroup();
            drawingGroup.Children.Add(gDrawing_Line);
            drawingGroup.Children.Add(gDrawing_Area);
        }

        protected override void OnRender(System.Windows.Media.DrawingContext drawingContext)
        {
            base.OnRender(drawingContext);

            

            // allows the points to be rendered as an image that can be further manipulated
            PathGeometry geometry = new PathGeometry();
            this.Siz

            // Add all points to the geometry
            foreach (Points pointXY in _points)
            {
                PathFigure figure = new PathFigure();
                figure.StartPoint = pointXY.FromPoint;
                figure.Segments.Add(new LineSegment(pointXY.ToPoint, true));
                geometry.Figures.Add(figure);
            }

            // Add the first point to close the gap from the graph's end point
            // to graph's start point
            PathFigure lastFigure = new PathFigure();
            lastFigure.StartPoint = _points[_points.Count - 1].FromPoint;
            lastFigure.Segments.Add(new LineSegment(_firstPoint, true));
            geometry.Figures.Add(lastFigure);

            // Create a new drawing and drawing group in order to apply
            // a custom drawing effect
            GeometryDrawing drawing = new GeometryDrawing(this.Pen.Brush, this.Pen, geometry);
            DrawingGroup drawingGroup = new DrawingGroup();
            drawingGroup.Children.Add(drawing);
        }

 private Drawing createDrawingWithGroupGemoetry()
 {
     GeometryDrawing drawing = new GeometryDrawing();
     drawing.Pen = new Pen(Brushes.Black, 1);
     drawing.Geometry = buildGeometryGroup();
     return drawing;
 }

        public void Init()
        {
            DrawingGroup dg = new DrawingGroup();
            ImageDrawing id = new ImageDrawing(UnderlayImage, new Rect(0, 0, UnderlayImage.PixelWidth, UnderlayImage.PixelHeight));
            dg.Children.Add(id);

            pointsGeometryGroup = new GeometryGroup();
            linesGeometryGroup = new GeometryGroup();
            middlePointGeoGrp = new GeometryGroup();
            if (points != null)
            {
                SetPointsGeometry();
            }

            GeometryDrawing gd = new GeometryDrawing(Brushes.Blue, null, pointsGeometryGroup);
            dg.Children.Add(gd);

            GeometryDrawing gd2 = new GeometryDrawing(null, new Pen(Brushes.LightGreen,3), linesGeometryGroup);
            dg.Children.Add(gd2);

            GeometryDrawing gd1 = new GeometryDrawing(Brushes.Red, null, middlePointGeoGrp);
            dg.Children.Add(gd1);

            Brush b = new SolidColorBrush(Colors.Red);
            b.Opacity = 0.5;
            mousePointGeometryDrwaing = new GeometryDrawing(b, null, null);
            dg.Children.Add(mousePointGeometryDrwaing);

            DrawingImage di = new DrawingImage(dg);
            this.Source = di;

            chosenPoint = -1;
        }

        private void PaintBackground()
        {
            var backgroundSquare = new GeometryDrawing(Brushes.Black, null, new RectangleGeometry(new Rect(0, 0, 100, 100)));

            var aGeometryGroup = new GeometryGroup();
            aGeometryGroup.Children.Add(new RectangleGeometry(new Rect(0, 0, 50, 50)));
            aGeometryGroup.Children.Add(new RectangleGeometry(new Rect(50, 50, 50, 50)));

            var checkerBrush = new LinearGradientBrush();
            checkerBrush.GradientStops.Add(new GradientStop(Colors.Black, 0.0));
            checkerBrush.GradientStops.Add(new GradientStop(Color.FromRgb(0, 22, 0), 1.0));

            var checkers = new GeometryDrawing(checkerBrush, null, aGeometryGroup);

            var checkersDrawingGroup = new DrawingGroup();
            checkersDrawingGroup.Children.Add(backgroundSquare);
            checkersDrawingGroup.Children.Add(checkers);

            var myBrush = new DrawingBrush
            {
                Drawing = checkersDrawingGroup,
                Viewport = new Rect(0, 0, 0.02, 0.02),
                TileMode = TileMode.Tile,
                Opacity = 0.5
            };

            LayoutRoot.Background = myBrush;
        }

        /// <summary>
        /// Create a new abstract shape.
        /// </summary>
        /// <param name="Id">The Id of the shape.</param>
        /// <param name="Latitude">The latitude of the shape center.</param>
        /// <param name="Longitude">The longitude of the shape center.</param>
        /// <param name="Altitude">The altitude of the shape center.</param>
        /// <param name="GeoWidth">The geographical width of the shape center.</param>
        /// <param name="GeoHeight">The geographical height of the shape center.</param>
        public AShape(String[] Geometries, Latitude Latitude, Longitude Longitude, Altitude Altitude, Latitude Latitude2, Longitude Longitude2, Color StrokeColor, Double StrokeThickness, Color FillColor)
        {
            this.Id         = Id;
            this.Latitude   = Latitude;
            this.Longitude  = Longitude;
            this.Altitude   = Altitude;
            this.Latitude2  = Latitude2;
            this.Longitude2 = Longitude2;

            var PathGeometry16 = PathGeometry.Parse(Geometries[8]);

            var GD16 = new GeometryDrawing(new SolidColorBrush(FillColor), new Pen(new SolidColorBrush(StrokeColor), StrokeThickness), PathGeometry16);

            var DrawingGroup = new DrawingGroup();
            DrawingGroup.Children.Add(GD16);

            this.Fill = new DrawingBrush()
            {
                Drawing = DrawingGroup,
                //Viewport = new Rect(0, 0, 1, 1),
                TileMode = TileMode.None,
                Stretch = Stretch.UniformToFill
            };

            Bounds = DrawingGroup.Bounds;
            var w = Bounds.Width;
            var h = Bounds.Height;
        }

        /// <summary>
        /// Within the given line add the scarlet box behind the a
        /// </summary>
        private void CreateVisuals(ITextViewLine line)
        {
            //grab a reference to the lines in the current TextView 
            IWpfTextViewLineCollection textViewLines = _view.TextViewLines;
            int start = line.Start;
            int end = line.End;

            //Loop through each character, and place a box around any a 
            for (int i = start; (i < end); ++i)
            {
                if (_view.TextSnapshot[i] == 'a')
                {
                    SnapshotSpan span = new SnapshotSpan(_view.TextSnapshot, Span.FromBounds(i, i + 1));
                    Geometry g = textViewLines.GetMarkerGeometry(span);
                    if (g != null)
                    {
                        GeometryDrawing drawing = new GeometryDrawing(_brush, _pen, g);
                        drawing.Freeze();

                        DrawingImage drawingImage = new DrawingImage(drawing);
                        drawingImage.Freeze();

                        Image image = new Image();
                        image.Source = drawingImage;

                        //Align the image with the top of the bounds of the text geometry
                        Canvas.SetLeft(image, g.Bounds.Left);
                        Canvas.SetTop(image, g.Bounds.Top);

                        _layer.AddAdornment(AdornmentPositioningBehavior.TextRelative, span, null, image, null);
                    }
                }
            }
        }