/*
 * NPlot - A charting library for .NET
 * 
 * PointPlot.cs
 * Copyright (C) 2003-2006 Matt Howlett and others.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of NPlot nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Drawing;

namespace NPlot
{

    /// <summary>
    /// Encapsulates functionality for drawing data as a series of points.
    /// </summary>
    public class PointPlot : BaseSequencePlot, ISequencePlot, IPlot
    {
        private Marker marker_;

        /// <summary>
        /// Default Constructor
        /// </summary>
        public PointPlot()
        {
            marker_ = new Marker();
        }

        /// <summary>
        /// Constructor for the marker plot.
        /// </summary>
        /// <param name="marker">The marker to use.</param>
        public PointPlot( Marker marker )
        {
            marker_ = marker;
        }


        /// <summary>
        /// Draws the point plot on a GDI+ surface against the provided x and y axes.
        /// </summary>
        /// <param name="g">The GDI+ surface on which to draw.</param>
        /// <param name="xAxis">The X-Axis to draw against.</param>
        /// <param name="yAxis">The Y-Axis to draw against.</param>
        public virtual void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
        {
            SequenceAdapter data_ = 
                new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );

            float leftCutoff_ = xAxis.PhysicalMin.X - marker_.Size;
            float rightCutoff_ = xAxis.PhysicalMax.X + marker_.Size;

            for (int i=0; i<data_.Count; ++i)
            {
                if ( !double.IsNaN(data_[i].X) && !double.IsNaN(data_[i].Y) )
                {
                    PointF xPos = xAxis.WorldToPhysical( data_[i].X, false);
                    if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X)
                        continue;

                    PointF yPos = yAxis.WorldToPhysical( data_[i].Y, false);
                    marker_.Draw( g, (int)xPos.X, (int)yPos.Y );
                    if (marker_.DropLine)
                    {
                        PointD yMin = new PointD( data_[i].X, Math.Max( 0.0f, yAxis.Axis.WorldMin ) );
                        PointF yStart = yAxis.WorldToPhysical( yMin.Y, false );
                        g.DrawLine( marker_.Pen, new Point((int)xPos.X,(int)yStart.Y), new Point((int)xPos.X,(int)yPos.Y) );
                    }
                }
            }
        }


        /// <summary>
        /// Returns an x-axis that is suitable for drawing this plot.
        /// </summary>
        /// <returns>A suitable x-axis.</returns>
        public Axis SuggestXAxis()
        {
            SequenceAdapter data_ = 
                new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );

            return data_.SuggestXAxis();
        }


        /// <summary>
        /// Returns a y-axis that is suitable for drawing this plot.
        /// </summary>
        /// <returns>A suitable y-axis.</returns>
        public Axis SuggestYAxis()
        {
            SequenceAdapter data_ = 
                new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );

            return data_.SuggestYAxis();
        }


        /// <summary>
        /// Draws a representation of this plot in the legend.
        /// </summary>
        /// <param name="g">The graphics surface on which to draw.</param>
        /// <param name="startEnd">A rectangle specifying the bounds of the area in the legend set aside for drawing.</param>
        public void DrawInLegend( Graphics g, Rectangle startEnd )
        {
            if (marker_.Size > 0)
            {
                marker_.Draw(g, (startEnd.Left + startEnd.Right) / 2, (startEnd.Top + startEnd.Bottom) / 2);
            }
            else if (marker_.Pen.Width > 0)
            {
                g.DrawLine(marker_.Pen,
                    (startEnd.Left + startEnd.Right) / 2, (startEnd.Top + startEnd.Bottom - marker_.Pen.Width) / 2,
                    (startEnd.Left + startEnd.Right) / 2, (startEnd.Top + startEnd.Bottom + marker_.Pen.Width) / 2);
            }
        }


        /// <summary>
        /// The Marker object used for the plot.
        /// </summary>
        public Marker Marker
        {
            set
            {
                marker_ = value;
            }
            get
            {
                return marker_;
            }
        }



    }
}
