// --------------------------------------------------------------------------------------------------------------------

// <copyright file="ConverterExtensions.cs" company="OxyPlot">

//   The MIT License (MIT)

//

//   Copyright (c) 2012 Oystein Bjorke

//

//   Permission is hereby granted, free of charge, to any person obtaining a

//   copy of this software and associated documentation files (the

//   "Software"), to deal in the Software without restriction, including

//   without limitation the rights to use, copy, modify, merge, publish,

//   distribute, sublicense, and/or sell copies of the Software, and to

//   permit persons to whom the Software is furnished to do so, subject to

//   the following conditions:

//

//   The above copyright notice and this permission notice shall be included

//   in all copies or substantial portions of the Software.

//

//   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

//   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

//   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

//   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

//   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

//   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

//   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

// </copyright>

// <summary>

//   Extension method used to convert to/from Windows/Windows.Media classes.

// </summary>

// --------------------------------------------------------------------------------------------------------------------

namespace OxyPlot.WindowsForms

{

    using System;

    using System.Drawing;

    using System.Windows.Forms;

    /// <summary>

    /// Extension method used to convert to/from Windows/Windows.Media classes.

    /// </summary>

    public static class ConverterExtensions

    {

        /// <summary>

        /// Calculate the distance between two points.

        /// </summary>

        /// <param name="p1">

        /// The first point.

        /// </param>

        /// <param name="p2">

        /// The second point.

        /// </param>

        /// <returns>

        /// The distance.

        /// </returns>

        public static double DistanceTo(this Point p1, Point p2)

        {

            double dx = p1.X - p2.X;

            double dy = p1.Y - p2.Y;

            return Math.Sqrt((dx * dx) + (dy * dy));

        }

        /// <summary>

        /// Converts a color to a Brush.

        /// </summary>

        /// <param name="c">

        /// The color.

        /// </param>

        /// <returns>

        /// A SolidColorBrush.

        /// </returns>

        public static Brush ToBrush(this OxyColor c)

        {

            return new SolidBrush(c.ToColor());

        }

        /// <summary>

        /// Converts an OxyColor to a Color.

        /// </summary>

        /// <param name="c">

        /// The color.

        /// </param>

        /// <returns>

        /// A Color.

        /// </returns>

        public static Color ToColor(this OxyColor c)

        {

            return Color.FromArgb(c.A, c.R, c.G, c.B);

        }

        /// <summary>

        /// Converts a HorizontalAlignment to a HorizontalTextAlign.

        /// </summary>

        /// <param name="alignment">

        /// The alignment.

        /// </param>

        /// <returns>

        /// A HorizontalTextAlign.

        /// </returns>

        public static OxyPlot.HorizontalAlignment ToHorizontalTextAlign(this HorizontalAlignment alignment)

        {

            switch (alignment)

            {

                case HorizontalAlignment.Center:

                    return OxyPlot.HorizontalAlignment.Center;

                case HorizontalAlignment.Right:

                    return OxyPlot.HorizontalAlignment.Right;

                default:

                    return OxyPlot.HorizontalAlignment.Left;

            }

        }

        /// <summary>

        /// Converts a Color to an OxyColor.

        /// </summary>

        /// <param name="color">

        /// The color.

        /// </param>

        /// <returns>

        /// An OxyColor.

        /// </returns>

        public static OxyColor ToOxyColor(this Color color)

        {

            return OxyColor.FromArgb(color.A, color.R, color.G, color.B);

        }

        /// <summary>

        /// Converts a nullable Color to an OxyColor.

        /// </summary>

        /// <param name="color">

        /// The color.

        /// </param>

        /// <returns>

        /// An OxyColor.

        /// </returns>

        public static OxyColor ToOxyColor(this Color? color)

        {

            return color.HasValue ? color.Value.ToOxyColor() : null;

        }

        /// <summary>

        /// Converts a Brush to an OxyColor.

        /// </summary>

        /// <param name="brush">

        /// The brush.

        /// </param>

        /// <returns>

        /// An oxycolor.

        /// </returns>

        public static OxyColor ToOxyColor(this Brush brush)

        {

            var scb = brush as SolidBrush;

            return scb != null ? scb.Color.ToOxyColor() : null;

        }

        /// <summary>

        /// Converts a Thickness to an OxyThickness.

        /// </summary>

        /// <returns>

        /// An OxyPlot thickness.

        /// </returns>

        /// <summary>

        /// Converts a ScreenPoint to a Point.

        /// </summary>

        /// <param name="pt">

        /// The screen point.

        /// </param>

        /// <param name="aliased">

        /// use pixel alignment conversion if set to <c>true</c>.

        /// </param>

        /// <returns>

        /// A point.

        /// </returns>

        public static Point ToPoint(this ScreenPoint pt, bool aliased)

        {

            // adding 0.5 to get pixel boundary alignment, seems to work

            // http://weblogs.asp.net/mschwarz/archive/2008/01/04/silverlight-rectangles-paths-and-line-comparison.aspx

            // http://www.wynapse.com/Silverlight/Tutor/Silverlight_Rectangles_Paths_And_Lines_Comparison.aspx

            if (aliased)

            {

                return new Point((int)pt.X, (int)pt.Y);

            }

            return new Point((int)Math.Round(pt.X), (int)Math.Round(pt.Y));

        }

        /// <summary>

        /// Converts an OxyRect to a Rect.

        /// </summary>

        /// <param name="r">

        /// The rectangle.

        /// </param>

        /// <param name="aliased">

        /// use pixel alignment if set to <c>true</c>.

        /// </param>

        /// <returns>

        /// A rect.

        /// </returns>

        public static Rectangle ToRect(this OxyRect r, bool aliased)

        {

            if (aliased)

            {

                var x = (int)r.Left;

                var y = (int)r.Top;

                var ri = (int)r.Right;

                var bo = (int)r.Bottom;

                return new Rectangle(x, y, ri - x, bo - y);

            }

            return new Rectangle(

                (int)Math.Round(r.Left), (int)Math.Round(r.Top), (int)Math.Round(r.Width), (int)Math.Round(r.Height));

        }

        /// <summary>

        /// Converts a point to a ScreenPoint.

        /// </summary>

        /// <param name="pt">

        /// The point.

        /// </param>

        /// <returns>

        /// A screen point.

        /// </returns>

        public static ScreenPoint ToScreenPoint(this Point pt)

        {

            return new ScreenPoint(pt.X, pt.Y);

        }

        /// <summary>

        /// Converts a Point array to a ScreenPoint array.

        /// </summary>

        /// <param name="points">

        /// The points.

        /// </param>

        /// <returns>

        /// A ScreenPoint array.

        /// </returns>

        public static ScreenPoint[] ToScreenPointArray(this Point[] points)

        {

            if (points == null)

            {

                return null;

            }

            var pts = new ScreenPoint[points.Length];

            for (int i = 0; i < points.Length; i++)

            {

                pts[i] = points[i].ToScreenPoint();

            }

            return pts;

        }

    }

}