/***********************************************************************************************
* 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.imageMap.ImageMapNotSupportedException;
import org.krysalis.jcharts.properties.DataAxisProperties;
import com.google.code.appengine.awt.*;
import com.google.code.appengine.awt.geom.Area;
import com.google.code.appengine.awt.geom.GeneralPath;
/*************************************************************************************
*
* @author Nathaniel Auvil
* @version $Id: StackedAreaChart.java,v 1.1 2003/05/17 16:56:57 nathaniel_auvil Exp $
************************************************************************************/
abstract class StackedAreaChart
{
/********************************************************************************************
* Draws the chart
*
* @param axisChart
* @param iAxisChartDataSet
*********************************************************************************************/
static void render( AxisChart axisChart, IAxisChartDataSet iAxisChartDataSet )
{
//---hopefully eliminate support requests asking about this...
if( axisChart.getImageMap() != null )
{
throw new ImageMapNotSupportedException( "HTML client-side image maps are not supported on Area Charts." );
}
//AreaChartProperties areaChartProperties=(AreaChartProperties) iAxisChartDataSet.getChartTypeProperties();
float xPosition=axisChart.getXAxis().getTickStart();
GeneralPath generalPaths[]=new GeneralPath[ iAxisChartDataSet.getNumberOfDataSets() ];
//---cache the computed values
//float[][] yAxisCoordinates= new float[ iAxisChartDataSet.getNumberOfDataSets() ][ iAxisChartDataSet.getNumberOfDataItems() ];
//---StackedAreaCharts can not be drawn on a horizontal axis so y-axis will always be the data axis
DataAxisProperties dataAxisProperties= (DataAxisProperties) axisChart.getAxisProperties().getYAxisProperties();
float stackedValue=0f;
//LOOP
//---initial postion of each line must be set with call to moveTo()
//---Do this here so every point does not have to check....if( i == 0 )... in loop
for( int i=0; i < generalPaths.length; i++ )
{
generalPaths[ i ]=new GeneralPath();
generalPaths[ i ].moveTo( xPosition, axisChart.getYAxis().getZeroLineCoordinate() );
stackedValue+=iAxisChartDataSet.getValue( i, 0 );
generalPaths[ i ].lineTo( xPosition, axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
stackedValue,
axisChart.getYAxis().getScaleCalculator().getMinValue() ) );
}
//LOOP
for( int j=1; j < iAxisChartDataSet.getNumberOfDataItems(); j++ )
{
xPosition+=axisChart.getXAxis().getScalePixelWidth();
stackedValue=0f;
//LOOP
for( int i=0; i < generalPaths.length; i++ )
{
stackedValue+=iAxisChartDataSet.getValue( i, j );
generalPaths[ i ].lineTo( xPosition, axisChart.getYAxis().computeAxisCoordinate( axisChart.getYAxis().getOrigin(),
stackedValue,
axisChart.getYAxis().getScaleCalculator().getMinValue() ) );
}
}
Area[] areas=new Area[ generalPaths.length ];
Area totalArea=null;
Area newArea;
//LOOP
//---close the path and create an Area so can stack them
for( int i=0; i < generalPaths.length; i++ )
{
generalPaths[ i ].lineTo( xPosition, axisChart.getYAxis().getZeroLineCoordinate() );
generalPaths[ i ].closePath();
//generalPaths[ i ].lineTo( axisChart.getXAxisProperties().getTickStartX(), axisChart.getYAxisProperties().getZeroLineCoordinate() );
newArea=new Area( generalPaths[ i ] );
//---if this is not the first area, subtract cumulative area
if( i > 0 )
{
areas[ i ]=(Area) newArea.clone();
areas[ i ].subtract( totalArea );
totalArea=newArea;
}
else
{
areas[ 0 ]=newArea;
totalArea=areas[ 0 ];
}
}
Graphics2D g2d=axisChart.getGraphics2D();
//LOOP
//---draw each path to the image
for( int i=0; i < areas.length; i++ )
{
g2d.setPaint( iAxisChartDataSet.getPaint( i ) );
//g2d.setStroke( lineChartProperties.getLineStrokes()[ i ] );
g2d.fill( areas[ i ] );
}
}
}