FastReport

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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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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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    /// Represents a polygon object.
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    /// </summary>
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    /// <remarks>
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    /// Use the <b>Border.Width</b>, <b>Border.Style</b> and <b>Border.Color</b> properties to set 
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    /// the line width, style and color.
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    /// 
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    /// </remarks>
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    public partial class PolygonObject : PolyLineObject
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    {
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        #region Protected Methods
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        /// <summary>
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        /// Calculate GraphicsPath for draw to page
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        /// </summary>
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        /// <param name="pen">Pen for lines</param>
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        /// <param name="scaleX">scale by width</param>
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        /// <param name="scaleY">scale by height</param>
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        /// <returns>Always returns a non-empty path</returns>
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        protected GraphicsPath getPolygonPath(Pen pen, float scaleX, float scaleY)
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        {
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            GraphicsPath gp = base.GetPath(pen, AbsLeft, AbsTop, AbsRight, AbsBottom, scaleX, scaleY);
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            gp.CloseAllFigures();
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            return gp;
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        }
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        /// <summary>
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        /// Draw polyline path to graphics
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        /// </summary>
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        /// <param name="e">Event arguments</param>
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        protected override void drawPoly(FRPaintEventArgs e)
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        {
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            float x = (AbsLeft + Border.Width / 2) * e.ScaleX;
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            float y = (AbsTop + Border.Width / 2) * e.ScaleY;
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            float dx = (Width - Border.Width) * e.ScaleX - 1;
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            float dy = (Height - Border.Width) * e.ScaleY - 1;
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            Pen pen;
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            if (polygonSelectionMode == PolygonSelectionMode.MoveAndScale)
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            {
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                pen = e.Cache.GetPen(Border.Color, Border.Width * e.ScaleX, Border.DashStyle);
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            }
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            else pen = e.Cache.GetPen(Border.Color, 1, DashStyle.Solid);
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            Brush brush = null;
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            if (Fill is SolidFill)
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                brush = e.Cache.GetBrush((Fill as SolidFill).Color);
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            else
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                brush = Fill.CreateBrush(new RectangleF(x, y, dx, dy), e.ScaleX, e.ScaleY);
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            DrawUtils.SetPenDashPatternOrStyle(DashPattern, pen, Border);
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            using (GraphicsPath path = getPolygonPath(pen, e.ScaleX, e.ScaleY))
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            {
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                if (polygonSelectionMode == PolygonSelectionMode.MoveAndScale)
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                    e.Graphics.FillAndDrawPath(pen, brush, path);
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                else
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                    e.Graphics.DrawPath(pen, path);
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            }
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        }
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        #endregion
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        #region Public Methods
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        /// <inheritdoc/>
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        public override void Serialize(FRWriter writer)
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        {
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            Border.SimpleBorder = true;
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            base.Serialize(writer);
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            PolygonObject c = writer.DiffObject as PolygonObject;
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        }
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        #endregion
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        /// <summary>
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        /// Initializes a new instance of the <see cref="LineObject"/> class with default settings.
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        /// </summary>
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        public PolygonObject() : base()
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        {
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            FlagSimpleBorder = true;
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            FlagUseFill = true;
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        }
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    }
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}