#region PDFsharp Charting - A .NET charting library based on PDFsharp
//
// Authors:
//   Niklas Schneider
//
// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// 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.
#endregion

using PdfSharp.Drawing;

namespace PdfSharp.Charting.Renderers
{
    /// <summary>
    /// Represents the legend renderer specific to pie charts.
    /// </summary>
    internal class PieLegendRenderer : LegendRenderer
    {
        /// <summary>
        /// Initializes a new instance of the PieLegendRenderer class with the specified renderer
        /// parameters.
        /// </summary>
        internal PieLegendRenderer(RendererParameters parms)
            : base(parms)
        { }

        /// <summary>
        /// Initializes the legend's renderer info. Each data point will be represented through
        /// a legend entry renderer info.
        /// </summary>
        internal override RendererInfo Init()
        {
            LegendRendererInfo lri = null;
            ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
            if (cri._chart._legend != null)
            {
                lri = new LegendRendererInfo();
                lri._legend = cri._chart._legend;

                lri.Font = Converter.ToXFont(lri._legend._font, cri.DefaultFont);
                lri.FontColor = new XSolidBrush(XColors.Black);

                if (lri._legend._lineFormat != null)
                    lri.BorderPen = Converter.ToXPen(lri._legend._lineFormat, XColors.Black, DefaultLineWidth, XDashStyle.Solid);

                XSeries xseries = null;
                if (cri._chart._xValues != null)
                    xseries = cri._chart._xValues[0];

                int index = 0;
                SeriesRendererInfo sri = cri.seriesRendererInfos[0];
                lri.Entries = new LegendEntryRendererInfo[sri._pointRendererInfos.Length];
                foreach (PointRendererInfo pri in sri._pointRendererInfos)
                {
                    LegendEntryRendererInfo leri = new LegendEntryRendererInfo();
                    leri._seriesRendererInfo = sri;
                    leri._legendRendererInfo = lri;
                    leri.EntryText = string.Empty;
                    if (xseries != null)
                    {
                        if (xseries.Count > index)
                            leri.EntryText = xseries[index]._value;
                    }
                    else
                        leri.EntryText = (index + 1).ToString(); // create default/dummy entry
                    leri.MarkerPen = pri.LineFormat;
                    leri.MarkerBrush = pri.FillFormat;

                    lri.Entries[index++] = leri;
                }
            }
            return lri;
        }
    }
}