/*
* AxisScalePolicyAutomaticBestFit.java of project jchart2d, <enterpurposehere>.
* Copyright (C) 2002 - 2011, Achim Westermann, created on Apr 22, 2011
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* If you modify or optimize the code in a useful way please let me know.
* Achim.Westermann@gmx.de
*
*
* File : $Source: /cvsroot/jchart2d/jchart2d/codetemplates.xml,v $
* Date : $Date: 2009/02/24 16:45:41 $
* Version: $Revision: 1.2 $
*/
package info.monitorenter.gui.chart.axis.scalepolicy;
import info.monitorenter.gui.chart.IAxis;
import info.monitorenter.gui.chart.IAxisScalePolicy;
import info.monitorenter.gui.chart.LabeledValue;
import info.monitorenter.gui.chart.axis.AAxisTransformation;
import info.monitorenter.util.Range;
import java.awt.Graphics;
import java.util.LinkedList;
import java.util.List;
/**
* Very basic implementation that has to be used with implementation of
* {@link AAxisTransformation} to have the scale transformed.
* <p>
*
* @author Bill Schoolfield (contributor)
*
* @author Achim Westermann (modification)
*
*/
public class AxisScalePolicyTransformation implements IAxisScalePolicy {
/**
* Uses the transformation function callbacks ({@link AAxisTransformation#transform(double)}, {@link AAxisTransformation#untransform(double)})
* of the {@link AAxisTransformation} this instance may be used with to have the scale transformed accordingly.
* <p>
*/
@SuppressWarnings("unchecked")
public List<LabeledValue> getScaleValues(final Graphics g2d, final IAxis<?> axis) {
// Might give a class cast exception in case this was not called from the AAxisTranfsormation itself:
AAxisTransformation<AxisScalePolicyTransformation> axisTransformation = (AAxisTransformation<AxisScalePolicyTransformation>) axis;
final List<LabeledValue> collect = new LinkedList<LabeledValue>();
LabeledValue label;
final Range domain = axis.getRange();
double min = domain.getMin();
double max = domain.getMax();
min = axisTransformation.transform(min);
max = axisTransformation.transform(max);
double range = max - min;
double exp = 0.;
double val = axisTransformation.untransform(0);
while (val <= axis.getMax()) {
if (val >= axis.getMin()) {
label = new LabeledValue();
label.setValue(val);
label.setLabel(axis.getFormatter().format(label.getValue()));
label.setMajorTick(true);
label.setValue((axisTransformation.transform(label.getValue()) - min) / range);
collect.add(label);
}
exp += 1.;
val = axisTransformation.untransform(exp);
}
return collect;
}
public void initPaintIteration(IAxis<?> axis) {
// nop
}
}