private UIElement GetHistogram()

in src/StructuredLogViewer/Controls/BuildControl.xaml.cs [1869:1942]
63 lines of code
9 McCabe index (conditional complexity)

        private UIElement GetHistogram(List<int> values)
        {
            double width = 800;
            double height = 200;
            var fill = Brushes.AliceBlue;
            var border = Brushes.LightBlue;

            var canvas = new Canvas()
            {
                Width = width,
                Height = height,
                Background = Brushes.Azure
            };

            double max = values.Max();
            int count = values.Count;

            for (double x = 0; x < width; x++)
            {
                int startIndex = (int)(x / width * count);
                int endIndex = (int)((x + 1) / width * count);
                if (startIndex < 0)
                {
                    startIndex = 0;
                }

                if (endIndex >= count)
                {
                    endIndex = count;
                }

                if (startIndex >= endIndex)
                {
                    continue;
                }

                int sum = 0;
                int maxInBucket = 0;
                for (int i = startIndex; i < endIndex; i++)
                {
                    int value = values[i];
                    sum += value;
                    if (maxInBucket < value)
                    {
                        maxInBucket = value;
                    }
                }

                if (sum == 0)
                {
                    continue;
                }

                double y = height * maxInBucket / max;
                if (y < height / 2)
                {
                    y += 5;
                }

                var rect = new System.Windows.Shapes.Rectangle
                {
                    Width = 1,
                    Height = y,
                    Fill = fill,
                    Stroke = border
                };
                Canvas.SetLeft(rect, x);
                Canvas.SetTop(rect, height - y);

                canvas.Children.Add(rect);
            }

            return canvas;
        }