stockchart.java

jCharts是一个100％基于Java的制图工具

/***********************************************************************************************
 * File Info: $Id: StockChart.java,v 1.9 2003/03/31 00:26:14 nathaniel_auvil Exp $
 * Copyright (C) 2000
 * Author: Nathaniel G. Auvil
 * Contributor(s):
 *
 * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 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. The name "jCharts" or "Nathaniel G. Auvil" must not be used to
 * 	  endorse or promote products derived from this Software without
 * 	  prior written permission of Nathaniel G. Auvil.  For written
 *    permission, please contact [e-mail]
 *
 * 4. Products derived from this Software may not be called "jCharts"
 *    nor may "jCharts" appear in their names without prior written
 *    permission of Nathaniel G. Auvil. jCharts is a registered
 *    trademark of Nathaniel G. Auvil.
 *
 * 5. Due credit should be given to the jCharts Project
 *    (http://jcharts.sourceforge.net/).
 *
 * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED 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
 * jCharts OR ITS 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.
 ************************************************************************************************/

package org.jCharts.axisChart;


import org.jCharts.chartData.interfaces.IStockChartDataSet;
import org.jCharts.chartData.interfaces.IDataSeries;
import org.jCharts.imageMap.CircleMapArea;
import org.jCharts.properties.StockChartProperties;
import org.jCharts.properties.DataAxisProperties;
import org.jCharts.types.StockChartDataType;

import java.awt.*;
import java.awt.geom.Line2D;


abstract class StockChart
{

	/********************************************************************************************
	 * Draws the chart
	 *
	 * @param axisChart
	 * @param iStockChartDataSet
	 *********************************************************************************************/
	static final void render( AxisChart axisChart, IStockChartDataSet iStockChartDataSet )
	{
		StockChartProperties stockChartProperties=(StockChartProperties) iStockChartDataSet.getChartTypeProperties();
		Graphics2D g2d=axisChart.getGraphics2D();

		DataAxisProperties dataAxisProperties= (DataAxisProperties) axisChart.getAxisProperties().getYAxisProperties();
      IDataSeries iDataSeries= (IDataSeries) axisChart.getIAxisDataSeries();


		//---cache the computed values
		//float[][] yAxisCoordinates=new float[ iStockChartDataSet.getNumberOfDataSets() ][ iStockChartDataSet.getNumberOfDataItems() ];


		//---init for first segment
		Line2D.Float line=new Line2D.Float( axisChart.getXAxis().getTickStart(),
														0,
														axisChart.getXAxis().getTickStart(),
														0 );


		Line2D.Float openLine=null;
		if( iStockChartDataSet.hasOpenValues() )
		{
			openLine=new Line2D.Float( axisChart.getXAxis().getTickStart() - stockChartProperties.getOpenPixelLength() - 1,
												0,
												axisChart.getXAxis().getTickStart() - 1,
												0 );
		}


		Line2D.Float closeLine=null;
		if( iStockChartDataSet.hasCloseValues() )
		{
			closeLine=new Line2D.Float( axisChart.getXAxis().getTickStart() + 1,
												 0,
												 axisChart.getXAxis().getTickStart() + stockChartProperties.getClosePixelLength() + 1,
												 0 );
		}


		//LOOP
		//---draw each line to the image
		for( int i=0; i < iStockChartDataSet.getNumberOfDataItems(); i++ )
		{
			line.y1= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
																				  iStockChartDataSet.getLowValue( i ),
																				  axisChart.getYAxis().getScaleCalculator().getMinValue() );
			line.y2= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
																				  iStockChartDataSet.getHighValue( i ),
																				  axisChart.getYAxis().getScaleCalculator().getMinValue() );

			String label;
			if( axisChart.getXAxis().getAxisLabelsGroup() != null )
			{
				label = axisChart.getXAxis().getAxisLabelsGroup().getTextTag( i ).getText();
			}
			else
			{
				label = null;
			}

			//---if we are generating an ImageMap, store the image coordinates
			if( axisChart.getGenerateImageMapFlag() )
			{
				axisChart.getImageMap().addImageMapArea( new CircleMapArea( line.x1,
																								line.y1,
																								iStockChartDataSet.getLowValue( i ),
																								label,
																								iStockChartDataSet.getLegendLabel( StockChartDataType.LOW.getInt() ) ) );

				axisChart.getImageMap().addImageMapArea( new CircleMapArea( line.x2,
																								line.y2,
																								iStockChartDataSet.getHighValue( i ),
																								label,
																								iStockChartDataSet.getLegendLabel( StockChartDataType.HIGH.getInt() ) ) );
			}

			g2d.setPaint( iStockChartDataSet.getPaint( StockChartDataType.HIGH.getInt() ) );
			g2d.setStroke( stockChartProperties.getHiLowStroke() );
			g2d.draw( line );

			line.x1+=axisChart.getXAxis().getScalePixelWidth();
			line.x2=line.x1;

			if( openLine != null )
			{
				if( iStockChartDataSet.getOpenValue( i ) != Double.NaN )
				{
					openLine.y1= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
																								iStockChartDataSet.getOpenValue( i ),
																								axisChart.getYAxis().getScaleCalculator().getMinValue() );
					openLine.y2=openLine.y1;

					g2d.setPaint( iStockChartDataSet.getPaint( StockChartDataType.OPEN.getInt() ) );
					g2d.setStroke( stockChartProperties.getOpenStroke() );
					g2d.draw( openLine );

					//---if we are generating an ImageMap, store the image coordinates
					if( axisChart.getGenerateImageMapFlag() )
					{
						axisChart.getImageMap().addImageMapArea( new CircleMapArea( openLine.x1,
																										openLine.y1,
																										iStockChartDataSet.getOpenValue( i ),
																										label,
																										iStockChartDataSet.getLegendLabel( StockChartDataType.OPEN.getInt() ) ) );
					}

					openLine.x1+=axisChart.getXAxis().getScalePixelWidth();
					openLine.x2+=axisChart.getXAxis().getScalePixelWidth();
				}
			}

			if( closeLine != null )
			{
				if( iStockChartDataSet.getOpenValue( i ) != Double.NaN )
				{
					closeLine.y1= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
																								 iStockChartDataSet.getCloseValue( i ),
																								 axisChart.getYAxis().getScaleCalculator().getMinValue() );
					closeLine.y2=closeLine.y1;

					g2d.setPaint( iStockChartDataSet.getPaint( StockChartDataType.CLOSE.getInt() ) );
					g2d.setStroke( stockChartProperties.getCloseStroke() );
					g2d.draw( closeLine );

					//---if we are generating an ImageMap, store the image coordinates
					if( axisChart.getGenerateImageMapFlag() )
					{
						axisChart.getImageMap().addImageMapArea( new CircleMapArea( closeLine.x2,
																										closeLine.y2,
																										iStockChartDataSet.getCloseValue( i ),
																										label,
																										iStockChartDataSet.getLegendLabel( StockChartDataType.CLOSE.getInt() ) ) );
					}

					closeLine.x1+=axisChart.getXAxis().getScalePixelWidth();
					closeLine.x2+=axisChart.getXAxis().getScalePixelWidth();
				}
			}
		}
	}

}