FastReport

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using System.ComponentModel;
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using System.Drawing.Drawing2D;
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using System.Drawing;
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using FastReport.Utils;
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namespace FastReport
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{
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    /// <summary>
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    /// Specifies a line cap style.
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    /// </summary>
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    public enum CapStyle
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    {
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        /// <summary>
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        /// Specifies a line without a cap.
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        /// </summary>
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        None,
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        /// <summary>
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        /// Specifies a line with a circle cap.
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        /// </summary>
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        Circle,
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        /// <summary>
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        /// Specifies a line with a square cap.
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        /// </summary>
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        Square,
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        /// <summary>
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        /// Specifies a line with a diamond cap.
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        /// </summary>
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        Diamond,
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        /// <summary>
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        /// Specifies a line with an arrow cap.
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        /// </summary>
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        Arrow
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    }
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    /// <summary>
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    /// Specifies a start and end line caps.
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    /// </summary>
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    [TypeConverter(typeof(FastReport.TypeConverters.FRExpandableObjectConverter))]
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    public class CapSettings
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    {
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        private float width;
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        private float height;
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        private CapStyle style;
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        /// <summary>
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        /// Gets or sets a width of the cap.
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        /// </summary>
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        [DefaultValue(8f)]
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        public float Width
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        {
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            get { return width; }
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            set { width = value; }
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        }
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        /// <summary>
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        /// Gets or sets a height of the cap.
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        /// </summary>
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        [DefaultValue(8f)]
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        public float Height
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        {
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            get { return height; }
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            set { height = value; }
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        }
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        /// <summary>
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        /// Gets or sets a cap style.
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        /// </summary>
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        [DefaultValue(CapStyle.None)]
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        public CapStyle Style
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        {
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            get { return style; }
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            set { style = value; }
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        }
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        internal void GetCustomCapPath(out GraphicsPath path, out float inset)
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        {
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            path = new GraphicsPath();
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            inset = 0;
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            switch (Style)
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            {
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                case CapStyle.Arrow:
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                    path.AddLine(new PointF(0, 0), new PointF(-Width, -Height));
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                    path.AddLine(new PointF(0, 0), new PointF(Width, -Height));
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                    break;
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                case CapStyle.Circle:
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                    path.AddEllipse(-Width / 2, -Height / 2, Width, Height);
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                    inset = Height / 2;
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                    break;
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                case CapStyle.Square:
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                    path.AddRectangle(new RectangleF(-Width / 2, -Height / 2, Width, Height));
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                    inset = Height / 2;
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                    break;
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                case CapStyle.Diamond:
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                    path.AddLine(new PointF(0, -Height / 1.4f), new PointF(-Width / 1.4f, 0));
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                    path.AddLine(new PointF(-Width / 1.4f, 0), new PointF(0, Height / 1.4f));
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                    path.AddLine(new PointF(0, Height / 1.4f), new PointF(Width / 1.4f, 0));
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                    path.AddLine(new PointF(Width / 1.4f, 0), new PointF(0, -Height / 1.4f));
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                    inset = Height / 1.4f;
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                    break;
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            }
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        }
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        /// <summary>
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        /// Assigns values from another source.
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        /// </summary>
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        /// <param name="source">Source to assign from.</param>
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        public void Assign(CapSettings source)
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        {
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            Width = source.Width;
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            Height = source.Height;
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            Style = source.Style;
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        }
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        /// <summary>
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        /// Creates exact copy of this object.
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        /// </summary>
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        /// <returns>Copy of this object.</returns>
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        public CapSettings Clone()
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        {
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            CapSettings result = new CapSettings();
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            result.Assign(this);
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            return result;
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        }
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        /// <inheritdoc/>
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        public override bool Equals(object obj)
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        {
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            CapSettings c = obj as CapSettings;
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            return c != null && Width == c.Width && Height == c.Height && Style == c.Style;
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        }
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        /// <inheritdoc/>
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        public override int GetHashCode()
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        {
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            return base.GetHashCode();
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        }
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        /// <summary>
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        /// Serializes the cap settings.
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        /// </summary>
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        /// <param name="prefix">Name of the cap property.</param>
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        /// <param name="writer">Writer object.</param>
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        /// <param name="diff">Another cap to compare with.</param>
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        /// <remarks>
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        /// This method is for internal use only.
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        /// </remarks>
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        public void Serialize(string prefix, FRWriter writer, CapSettings diff)
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        {
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            if (Width != diff.Width)
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                writer.WriteFloat(prefix + ".Width", Width);
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            if (Height != diff.Height)
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                writer.WriteFloat(prefix + ".Height", Height);
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            if (Style != diff.Style)
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                writer.WriteValue(prefix + ".Style", Style);
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        }
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        /// <summary>
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        /// Initializes a new instance of the <b>CapSettings</b> class with default settings. 
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        /// </summary>
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        public CapSettings()
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        {
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            width = 8;
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            height = 8;
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        }
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    }
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}
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