using System.Drawing;
using ClearCanvas.Common;
using ClearCanvas.ImageViewer.PresentationStates.Dicom;

namespace Nullstack.ClearCanvas.ImageViewerTools.Overlays
{
	[ExtensionOf(typeof (OverlayTestPatternExtensionPoint))]
	public sealed class CheckerboardTestPattern : IOverlayTestPattern
	{
		private bool _firstSquareFilled = false;

		public string Name
		{
			get { return "Checkerboard"; }
		}

		public string Description
		{
			get { return "Checkerboard test pattern"; }
		}

		public bool FirstSquareFilled
		{
			get { return _firstSquareFilled; }
			set { _firstSquareFilled = value; }
		}

		public OverlayPlaneGraphic CreatePattern(Size patternSize)
		{
			int rows = patternSize.Height;
			int columns = patternSize.Width;

			UserOverlayPlaneGraphic pattern = new UserOverlayPlaneGraphic(rows, columns);
			pattern.Label = this.Name.ToUpperInvariant();
			pattern.Description = this.Description;

			for (int x = 0; x < columns; x++)
			{
				for (int y = 0; y < rows; y++)
				{
					int file = (int) (8f*x/columns);
					int rank = (int) (8f*y/rows);
					pattern[x, y] = (file%2 == 0) ^ (rank%2 == 0) ^ _firstSquareFilled;
				}
			}

			return pattern;
		}
	}
}