private void canvasControl_Draw()

in ExampleGallery/SvgExample.xaml.cs [150:213]

• 56 lines of code
• 10 McCabe index (conditional complexity)

        private void canvasControl_Draw(CanvasControl sender, CanvasDrawEventArgs args)
        {
            if (!svgSupported)
            {
                args.DrawingSession.Clear(Colors.Black);
                DrawNotSupportedMessage(args.DrawingSession, sender.Size);
                return;
            }

            if (svgDocument == null)
            {
                canvasControl.Invalidate();
                return;
            }

            Size viewportSize = new Size() { Width = 1000, Height = 1000 };

            if (CurrentEffectType == EffectType.None)
            {
                args.DrawingSession.DrawSvg(svgDocument, viewportSize);
            }
            else if (CurrentEffectType == EffectType.EdgeDetection)
            {
                CanvasCommandList commandList = new CanvasCommandList(sender);

                using (var ds = commandList.CreateDrawingSession())
                {
                    ds.DrawSvg(svgDocument, viewportSize);
                }

                var edgeDetection = new EdgeDetectionEffect
                {
                    Source = commandList,
                    Amount = 1,
                    BlurAmount = 1
                };

                args.DrawingSession.DrawImage(edgeDetection);
            }
            
            if (pointerDrag != null)
            {
                if (CurrentShapeType == ShapeType.Rectangle)
                {
                    // Show ghost
                    args.DrawingSession.DrawRectangle(pointerDrag.GetRectangle(), Colors.Magenta);
                }
                else if (CurrentShapeType == ShapeType.Ellipse)
                {
                    var ellipse = pointerDrag.GetEllipse();
                    args.DrawingSession.DrawEllipse(ellipse.CenterX, ellipse.CenterY, ellipse.RadiusX, ellipse.RadiusY, Colors.Magenta);
                }
                else if (CurrentShapeType == ShapeType.Circle)
                {
                    var circle = pointerDrag.GetCircle();
                    args.DrawingSession.DrawCircle(circle.Center, circle.Radius, Colors.Magenta);
                    args.DrawingSession.DrawLine(circle.Center, pointerDrag.CurrentLocation.ToVector2(), Colors.Magenta);
                }
                else if (CurrentShapeType == ShapeType.Line)
                {
                    args.DrawingSession.DrawLine(pointerDrag.StartLocation.ToVector2(), pointerDrag.CurrentLocation.ToVector2(), Colors.Magenta);
                }
            }
        }