/***********************************************************************************************
* 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.axis.scale;
import org.krysalis.jcharts.axisChart.axis.scale.ScaleCalculator;
/*************************************************************************************
*
* @author Nathaniel Auvil, Mike Lissick
* @version $Id: AutomaticScaleCalculator.java,v 1.1 2003/05/17 16:54:36 nathaniel_auvil Exp $
************************************************************************************/
public class AutomaticScaleCalculator extends ScaleCalculator
{
/****************************************************************************************
*
***************************************************************************************/
public AutomaticScaleCalculator()
{
}
/*********************************************************************************************
* Computes the axis increment taking into account the user specified criteria.
*
********************************************************************************************/
public void computeIncrement()
{
double powerOfTen = Math.pow( 10.0d, Math.abs( ( double ) super.getRoundingPowerOfTen() ) );
double range;
//---if MIN >= 0, MAX is the range, if MAX < 0, -MIN is the range
if( ( super.getMinValue() >= 0 ) || ( super.getMaxValue() < 0 ) )
{
range = Math.max( super.getMaxValue(), -super.getMinValue() );
super.increment = range / ( super.getNumberOfScaleItems() - 1 );
this.roundTheIncrement( powerOfTen );
if( super.getMinValue() >= 0 )
{
super.setMinValue( 0.0d );
super.setMaxValue( super.increment * super.getNumberOfScaleItems() );
}
else
{
super.setMaxValue( 0.0d );
super.setMinValue( -( super.increment * super.getNumberOfScaleItems() ) );
}
}
//---else MIN is negative and MAX is positive, so add values together (minus a negative is a positive)
else
{
super.setMinValue( super.round( super.getMinValue(), powerOfTen ) );
//---round min value down to get the start value for axis. Compute range from this value.
if( super.getRoundingPowerOfTen() > 0 )
{
super.setMinValue( super.getMinValue() - powerOfTen );
}
else
{
super.setMinValue( super.getMinValue()- ( 1 / powerOfTen ) );
}
//---we want the rounded Axis min for range
//---MIN is always negative at this point so minus a negative is a positive
range = super.getMaxValue() - super.getMinValue();
super.increment = range / ( super.getNumberOfScaleItems() - 1 );
super.roundTheIncrement( powerOfTen );
//---axis starts at minValue, not zero!
super.setMaxValue( super.getMinValue() + ( this.increment * super.getNumberOfScaleItems() ) );
}
}
/*********************************************************************************************
* Drives the computation of the axis increment and related values taking into account the
* user specified rounding criteria and sets it to the super class increment variable.
*
* So if you specify to round to the nearest 100 and give an increment of 2.5, the increment
* will become 100.
*
* @param numberOfScaleItems
********************************************************************************************
public void roundScaleValues( double powerOfTen, int numberOfScaleItems )
{
this.roundTheIncrement( powerOfTen );
//---if MIN >= 0, MAX is the range, if MAX < 0, -MIN is the range
if( ( super.getMinValue() >= 0 ) || ( super.getMaxValue() < 0 ) )
{
if( super.getMinValue() >= 0 )
{
super.setMinValue( 0.0d );
super.setMaxValue( super.increment * numberOfScaleItems );
}
else
{
super.setMaxValue( 0.0d );
super.setMinValue( -( super.increment * numberOfScaleItems ) );
}
}
//---else MIN is negative and MAX is positive, so add values together (minus a negative is a positive)
else
{
super.setMinValue( super.round( super.getMinValue(), powerOfTen ) );
//---round min value down to get the start value for axis. Compute range from this value.
if( super.getRoundingPowerOfTen() > 0 )
{
super.setMinValue( super.getMinValue() - powerOfTen );
}
else
{
super.setMinValue( super.getMinValue()- ( 1 / powerOfTen ) );
}
//---we want the rounded Axis min for range
//---MIN is always negative at this point so minus a negative is a positive
range = super.getMaxValue() - super.getMinValue();
super.increment = range / numberOfScaleItems;
super.roundTheIncrement( powerOfTen );
//---axis starts at minValue, not zero!
super.setMaxValue( super.getMinValue() + ( this.increment * numberOfScaleItems ) );
}
}
*/
/*
public static void main( String[] args )
{
AutomaticScaleCalculator s= new AutomaticScaleCalculator();
}
*/
}