/*
 * NPlot - A charting library for .NET
 * 
 * BarPlot.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>
	/// Draws 
	/// </summary>
	public class BarPlot : BasePlot, IPlot, IDrawable
	{

		/// <summary>
		/// Default Constructor
		/// </summary>
		public BarPlot()
		{
		}


		/// <summary>
		/// Gets or sets the data, or column name for the ordinate [y] axis.
		/// </summary>
		public object OrdinateDataTop
		{
			get
			{
				return this.ordinateDataTop_;
			}
			set
			{
				this.ordinateDataTop_ = value;
			}
		}
		private object ordinateDataTop_ = null;

		
		/// <summary>
		/// Gets or sets the data, or column name for the ordinate [y] axis.
		/// </summary>
		public object OrdinateDataBottom
		{
			get
			{
				return this.ordinateDataBottom_;
			}
			set
			{
				this.ordinateDataBottom_ = value;
			}
		}
		private object ordinateDataBottom_ = null;


		/// <summary>
		/// Gets or sets the data, or column name for the abscissa [x] axis.
		/// </summary>
		public object AbscissaData
		{
			get
			{
				return this.abscissaData_;
			}
			set
			{
				this.abscissaData_ = value;
			}
		}
		private object abscissaData_ = null;


		/// <summary>
		/// Draws the line 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 void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
		{
			SequenceAdapter dataTop = 
				new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateDataTop, this.AbscissaData );

			SequenceAdapter dataBottom = 
				new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateDataBottom, this.AbscissaData );

			ITransform2D t = Transform2D.GetTransformer( xAxis, yAxis );
			
			for (int i=0; i<dataTop.Count; ++i)
			{
				PointF physicalBottom = t.Transform( dataBottom[i] );
				PointF physicalTop = t.Transform( dataTop[i] );

				if (physicalBottom != physicalTop) 
				{
					Rectangle r = new Rectangle( (int)(physicalBottom.X - BarWidth/2), (int)physicalTop.Y,
						(int)BarWidth, (int)(physicalBottom.Y - physicalTop.Y) );

					g.FillRectangle( this.rectangleBrush_.Get(r), r );
					g.DrawRectangle( borderPen_, r );
				}
			}

		}

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

			SequenceAdapter dataTop_ = 
				new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateDataTop, this.AbscissaData );

			Axis axis = dataTop_.SuggestXAxis();
			axis.LUB(dataBottom_.SuggestXAxis());
			return axis;
		}




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

			SequenceAdapter dataTop_ = 
				new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateDataTop, this.AbscissaData );

			Axis axis = dataTop_.SuggestYAxis();
			axis.LUB(dataBottom_.SuggestYAxis());
			return axis;
		}


		/// <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 virtual void DrawInLegend(Graphics g, Rectangle startEnd)
		{
			int smallerHeight = (int)(startEnd.Height * 0.5f);
			int heightToRemove = (int)(startEnd.Height * 0.5f);
			Rectangle newRectangle = new Rectangle( startEnd.Left, startEnd.Top + smallerHeight / 2, startEnd.Width, smallerHeight );
			g.FillRectangle( rectangleBrush_.Get( newRectangle ), newRectangle );
			g.DrawRectangle( borderPen_, newRectangle );
		}

		/// <summary>
		/// The pen used to draw the plot
		/// </summary>
		public System.Drawing.Pen BorderPen
		{
			get
			{
				return borderPen_;
			}
			set
			{
				borderPen_ = value;
			}
		}
		private System.Drawing.Pen borderPen_ = new Pen(Color.Black);


		/// <summary>
		/// The color of the pen used to draw lines in this plot.
		/// </summary>
		public System.Drawing.Color BorderColor
		{
			set
			{
				if (borderPen_ != null)
				{
					borderPen_.Color = value;
				}
				else
				{
					borderPen_ = new Pen(value);
				}
			}
			get
			{
				return borderPen_.Color;
			}
		}


		/// <summary>
		/// Set/Get the fill brush
		/// </summary>
		public IRectangleBrush FillBrush
		{
			get
			{
				return rectangleBrush_;
			}
			set
			{
				rectangleBrush_ = value;
			}

		}
		private IRectangleBrush rectangleBrush_ = new RectangleBrushes.Solid( Color.LightGray );


		/// <summary>
		/// Set/Get the width of the bar in physical pixels.
		/// </summary>
		public float BarWidth			         
		{
			get 
			{ 
				return barWidth_; 
			}
			set 
			{ 
				barWidth_ = value; 
			}
		}
        private float barWidth_ = 8;


		/// <summary>
		/// Write data associated with the plot as text.
		/// </summary>
		/// <param name="sb">the string builder to write to.</param>
		/// <param name="region">Only write out data in this region if onlyInRegion is true.</param>
		/// <param name="onlyInRegion">If true, only data in region is written, else all data is written.</param>
		/// <remarks>TODO: not implemented.</remarks>
		public void WriteData( System.Text.StringBuilder sb, RectangleD region, bool onlyInRegion )
		{
			sb.Append( "Write data not implemented yet for BarPlot\r\n" );
		}


	}

}
