C# Ellipse.Arrange方法代码示例

        public ParticleSystem(int maxCount, System.Windows.Media.Color color)
        {
            this.maxParticleCount = maxCount;

            this.particleList = new List<Particle>();

            this.particleModel = new GeometryModel3D();
            this.particleModel.Geometry = new MeshGeometry3D();

            Ellipse e = new Ellipse();
            e.Width = 32.0;
            e.Height = 32.0;
            RadialGradientBrush b = new RadialGradientBrush();
            b.GradientStops.Add(new GradientStop(System.Windows.Media.Color.FromArgb(0xFF, color.R, color.G, color.B), 0.25));
            b.GradientStops.Add(new GradientStop(System.Windows.Media.Color.FromArgb(0x00, color.R, color.G, color.B), 1.0));
            e.Fill = b;
            e.Measure(new System.Windows.Size(32, 32));
            e.Arrange(new Rect(0, 0, 32, 32));

            var brush = new VisualBrush(e);

            DiffuseMaterial material = new DiffuseMaterial(brush);

            this.particleModel.Material = material;

            this.rand = new Random(brush.GetHashCode());
        }

        private void AddGraphicToMap_Click(object sender, RoutedEventArgs e)
        {
            // Create a diagonal linear gradient with four stops.
            // http://msdn.microsoft.com/en-us/library/system.windows.media.lineargradientbrush.aspx
            LinearGradientBrush myLinearGradientBrush =
                new LinearGradientBrush();
            myLinearGradientBrush.StartPoint = new Point(0, 0);
            myLinearGradientBrush.EndPoint = new Point(1, 1);
            myLinearGradientBrush.GradientStops.Add(
                new GradientStop(Colors.Yellow, 0.0));
            myLinearGradientBrush.GradientStops.Add(
                new GradientStop(Colors.Red, 0.25));
            myLinearGradientBrush.GradientStops.Add(
                new GradientStop(Colors.Blue, 0.75));
            myLinearGradientBrush.GradientStops.Add(
                new GradientStop(Colors.LimeGreen, 1.0));

            // Add an Ellipse Element
            // http://msdn.microsoft.com/en-us/library/system.windows.shapes.ellipse.aspx
            Ellipse myEllipse = new Ellipse();
            myEllipse.Stroke = System.Windows.Media.Brushes.Black;
            myEllipse.Fill = myLinearGradientBrush;
            myEllipse.HorizontalAlignment = HorizontalAlignment.Left;
            myEllipse.VerticalAlignment = VerticalAlignment.Center;
            myEllipse.Width = 50;
            myEllipse.Height = 50;

            //Force render
            myEllipse.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
            myEllipse.Arrange(new Rect(myEllipse.DesiredSize));

            RenderTargetBitmap render = new RenderTargetBitmap(200, 200, 150, 150, PixelFormats.Pbgra32);
            render.Render(myEllipse);

            PictureMarkerSymbol pms = new PictureMarkerSymbol()
            {
                Source = render,
            };

            Random random = new Random();
            var graphic = new Graphic() { Geometry = new MapPoint(random.Next(-20000000, 20000000), random.Next(-20000000, 20000000)) };
            graphic.Symbol = pms;
            MarkerGraphicsLayer.Graphics.Add(graphic);
        }

        public ParticleSystem(int maxCount, Color color)
        {
            _maxParticleCount = maxCount;

            _particleModel = new GeometryModel3D {Geometry = new MeshGeometry3D()};

            _particleList = new List<Particle>();

            //FELO: Drawing particle: Ellipse.
            var ellipse = new Ellipse {Width = ParticleSizeConst, Height = ParticleSizeConst};
            var radialGradientBrush = new RadialGradientBrush();
            radialGradientBrush.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, color.R, color.G, color.B), StandardColorOffset));
            radialGradientBrush.GradientStops.Add(new GradientStop(Color.FromArgb(0x00, color.R, color.G, color.B), StandardColorOffsetBorder));
            ellipse.Fill = radialGradientBrush;
            ellipse.Measure(new Size(ParticleSizeConst, ParticleSizeConst));
            ellipse.Arrange(new Rect(0, 0, ParticleSizeConst, ParticleSizeConst));

            ApplyMaterialToBrush(ellipse);
        }

        public ParticleSystem(int maxCount, Color color)
        {
            MaxParticleCount = maxCount;

            _particleList = new List<Particle>();

            _particleModel = new GeometryModel3D {Geometry = new MeshGeometry3D()};

            var e = new Ellipse
            {
                Width = 32.0,
                Height = 32.0
            };
            var b = new RadialGradientBrush();
            b.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, color.R, color.G, color.B), 0.25));
            b.GradientStops.Add(new GradientStop(Color.FromArgb(0x00, color.R, color.G, color.B), 1.0));
            e.Fill = b;
            e.Measure(new Size(32, 32));
            e.Arrange(new Rect(0, 0, 32, 32));

            Brush brush = null;

#if USE_VISUALBRUSH
            brush = new VisualBrush(e);
#else
            var renderTarget = new RenderTargetBitmap(32, 32, 96, 96, PixelFormats.Pbgra32);
            renderTarget.Render(e);
            renderTarget.Freeze();
            brush = new ImageBrush(renderTarget);
#endif

            var material = new DiffuseMaterial(brush);

            _particleModel.Material = material;

            _rand = new Random(brush.GetHashCode());
        }

        public ParticleSystem(int maxCount, System.Windows.Media.Color color)
        {
            this.maxParticleCount = maxCount;

            this.particleList = new List<Particle>();

            this.particleModel = new GeometryModel3D();
            this.particleModel.Geometry = new MeshGeometry3D();

            Ellipse e = new Ellipse();
            e.Width = 32.0;
            e.Height = 32.0;
            RadialGradientBrush b = new RadialGradientBrush();
            b.GradientStops.Add(new GradientStop(System.Windows.Media.Color.FromArgb(0xFF, color.R, color.G, color.B), 0.25));
            b.GradientStops.Add(new GradientStop(System.Windows.Media.Color.FromArgb(0x00, color.R, color.G, color.B), 1.0));
            e.Fill = b;
            e.Measure(new System.Windows.Size(32, 32));
            e.Arrange(new Rect(0, 0, 32, 32));

            System.Windows.Media.Brush brush = null;

            #if USE_VISUALBRUSH
            brush = new VisualBrush(e);
            #else
            RenderTargetBitmap renderTarget = new RenderTargetBitmap(32, 32, 96, 96, PixelFormats.Pbgra32);
            renderTarget.Render(e);
            renderTarget.Freeze();
            brush = new ImageBrush(renderTarget);
            #endif

            DiffuseMaterial material = new DiffuseMaterial(brush);

            this.particleModel.Material = material;

            this.rand = new Random(brush.GetHashCode());
        }

        private void CreateBitmap(bool filled)
        {
            double innerDiameter = m_compassInner.Width;
            var circle = new Ellipse();
            circle.Width = innerDiameter/2;
            circle.Height = innerDiameter/2;
            circle.Fill = filled ? Brushes.White : Brushes.Transparent;
            circle.Stroke = filled ? Brushes.Transparent : Brushes.White;

            double dpiX, dpiY;
            GetScreenDpi(out dpiX, out dpiY);
            var bitmap = new RenderTargetBitmap((int)innerDiameter, (int)innerDiameter,
                dpiX, dpiY, PixelFormats.Pbgra32);
            circle.Arrange(new Rect(new Size(innerDiameter, innerDiameter)));
            bitmap.Render(circle);
            m_compassInner.Source = bitmap;
            m_compassInner.InvalidateVisual();
        }