Package org.krysalis.jcharts.axisChart

Source Code of org.krysalis.jcharts.axisChart.LineChart

/***********************************************************************************************
* 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 nathaniel_auvil@users.sourceforge.net
*
* 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.krysalis.jcharts.axisChart;


import org.krysalis.jcharts.chartData.interfaces.IAxisChartDataSet;
import org.krysalis.jcharts.chartData.interfaces.IDataSeries;
import org.krysalis.jcharts.imageMap.CircleMapArea;
import org.krysalis.jcharts.properties.*;

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


/*************************************************************************************
*
* @author Nathaniel Auvil
* @version $Id: LineChart.java,v 1.3 2003/09/26 00:44:02 nathaniel_auvil Exp $
************************************************************************************/
abstract class LineChart
{

  /********************************************************************************************
   * Draws the chart
   *
   * @param axisChart
   * @param iAxisChartDataSet
   * @throws PropertyException
   *********************************************************************************************/
  static void render( AxisChart axisChart, IAxisChartDataSet iAxisChartDataSet ) throws PropertyException
  {
    Graphics2D g2d=axisChart.getGraphics2D();

    LineChartProperties lineChartProperties=(LineChartProperties) iAxisChartDataSet.getChartTypeProperties();
    lineChartProperties.validate( iAxisChartDataSet );

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

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

    //---need this for image map calculation
    float xMapCoordinate=axisChart.getXAxis().getTickStart();


    //LOOP
    for( int j=0; j < iAxisChartDataSet.getNumberOfDataItems(); j++ )
    {
      //LOOP
      for( int i=0; i < yAxisCoordinates.length; i++ )
      {
        if( iAxisChartDataSet.getValue( i, j ) != Double.NaN )
        {
                                        // Dual Y axis changes integrated CMC 25Aug03
          //yAxisCoordinates[ i ][ j ]= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
          //                                                iAxisChartDataSet.getValue( i, j ),
          //                                                axisChart.getYAxis().getScaleCalculator().getMinValue() );

                                        // The coordinates of the line charts are drawn with the default scale and
                                        // multiplicate with the second scale for the right axis (by default equal 1)
                                        // if the second scale at the right is unchanged then there will be no impact
                                        yAxisCoordinates[ i ][ j ]= axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
                                                                                    iAxisChartDataSet.getValue( i, j )*axisChart.axisProperties.getYAxisProperties().getSecondScaleRight(),
                                                                                    axisChart.getYAxis().getScaleCalculator().getMinValue() );

          //---if we are generating an ImageMap, store the image coordinates
          if( axisChart.getGenerateImageMapFlag() )
          {
            String label;
            if( axisChart.getXAxis().getAxisLabelsGroup() != null )
            {
              label = axisChart.getXAxis().getAxisLabelsGroup().getTextTag( j ).getText();
            }
            else
            {
              label = null;
            }

            axisChart.getImageMap().addImageMapArea( new CircleMapArea( xMapCoordinate,
                                                    yAxisCoordinates[ i ][ j ],
                                                    iAxisChartDataSet.getValue( i, j ),
                                                    label,
                                                    iAxisChartDataSet.getLegendLabel( i ) ) );
          }
        }
        else
        {
          yAxisCoordinates[ i ][ j ]=Float.NaN;
        }
      }

      xMapCoordinate+=axisChart.getXAxis().getScalePixelWidth();
    }


    AffineTransform originalTransform=null;
    double[] cornerXOffset=null;
    double[] cornerYOffset=null;

    //---check if there are any points to display
    if( lineChartProperties.getShapes() != null )
    {
      //---when centering the shapes on the points, need x and y offset to do this
      cornerXOffset=new double[ iAxisChartDataSet.getNumberOfDataSets() ];
      cornerYOffset=new double[ iAxisChartDataSet.getNumberOfDataSets() ];

      //---get the original transform so can reset it.
      originalTransform=g2d.getTransform();

      Rectangle2D rectangle;

      //LOOP
      //---pre-compute the dimensions of each Shape so do not do it in loop.
      for( int i=0; i < iAxisChartDataSet.getNumberOfDataSets(); i++ )
      {
        if( lineChartProperties.getShapes()[ i ] != null )
        {
          rectangle=lineChartProperties.getShapes()[ i ].getBounds2D();
          cornerXOffset[ i ]=rectangle.getWidth() / 2;
          cornerYOffset[ i ]=rectangle.getHeight() / 2;
        }
      }
    }


    //---init for first segment
    Line2D.Float line=new Line2D.Float( axisChart.getXAxis().getTickStart(),
                            yAxisCoordinates[ 0 ][ 0 ],
                            axisChart.getXAxis().getTickStart(),
                            yAxisCoordinates[ 0 ][ 0 ] );
    //---make sure not plotting a chart with only one data point.
    if( yAxisCoordinates[ 0 ].length > 1 )
    {
      line.y2= yAxisCoordinates[ 0 ][ 1 ];
    }


    //LOOP
    //---draw each line to the image
    for( int i=0; i < yAxisCoordinates.length; i++ )
    {
      line.x1=axisChart.getXAxis().getTickStart();
      line.y1=yAxisCoordinates[ i ][ 0 ];
      line.x2=line.x1;

      //LOOP
      for( int j=1; j < yAxisCoordinates[ 0 ].length; j++ )
      {
        //---if current point on line should be drawn
        if( !Float.isNaN( yAxisCoordinates[ i ][ j ] ) )
        {
          //---if the previous point was not drawn, no line
          if( Float.isNaN( yAxisCoordinates[ i ][ j - 1 ] ) )
          {
            line.x2+=axisChart.getXAxis().getScalePixelWidth();
            line.x1=line.x2;
            line.y1=yAxisCoordinates[ i ][ j ];
            line.y2=yAxisCoordinates[ i ][ j ];

            continue;
          }


          line.x2+=axisChart.getXAxis().getScalePixelWidth();
          line.y2=yAxisCoordinates[ i ][ j ];

          g2d.setPaint( iAxisChartDataSet.getPaint( i ) );
          g2d.setStroke( lineChartProperties.getLineStrokes()[ i ] );
          g2d.draw( line );

          //---plot the Point
          if( lineChartProperties.getShapes()[ i ] != null )
          {
            //---translate the Shape into position.
            g2d.translate( line.x1 - cornerXOffset[ i ], line.y1 - cornerYOffset[ i ] );

            g2d.setPaint( iAxisChartDataSet.getPaint( i ) );
            g2d.fill( lineChartProperties.getShapes()[ i ] );

            //---translate back to the original position
            g2d.setTransform( originalTransform );
          }

          line.x1=line.x2;
          line.y1=line.y2;
        }
        else
        {
          if( ( !Float.isNaN( yAxisCoordinates[ i ][ j - 1 ] ) ) && ( lineChartProperties.getShapes()[ i ] != null ) )
          {
            //---translate the Shape into position.
            g2d.translate( line.x1 - cornerXOffset[ i ], line.y1 - cornerYOffset[ i ] );

            g2d.setPaint( iAxisChartDataSet.getPaint( i ) );
            g2d.fill( lineChartProperties.getShapes()[ i ] );

            //---translate back to the original position
            g2d.setTransform( originalTransform );
          }

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


      //---put the last shape on the line
      if( ( !Float.isNaN( yAxisCoordinates[ i ][ yAxisCoordinates[ i ].length - 1 ] ) ) && ( lineChartProperties.getShapes()[ i ] != null ) )
      {
        //---translate the Shape into position.
        g2d.translate( line.x2 - cornerXOffset[ i ], line.y2 - cornerYOffset[ i ] );

        g2d.setPaint( iAxisChartDataSet.getPaint( i ) );
        g2d.fill( lineChartProperties.getShapes()[ i ] );

        //---translate back to the original position
        g2d.setTransform( originalTransform );
      }
    }
  }


}
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