org.kalypso.ogc.sensor.diagview.jfreechart.PolderControlAxis.java Source code

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Here is the source code for org.kalypso.ogc.sensor.diagview.jfreechart.PolderControlAxis.java

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/*--------------- Kalypso-Header ------------------------------------------
    
 This file is part of kalypso.
 Copyright (C) 2004, 2005 by:
    
 Technical University Hamburg-Harburg (TUHH)
 Institute of River and coastal engineering
 Denickestr. 22
 21073 Hamburg, Germany
 http://www.tuhh.de/wb
    
 and
    
 Bjoernsen Consulting Engineers (BCE)
 Maria Trost 3
 56070 Koblenz, Germany
 http://www.bjoernsen.de
    
 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    
 Contact:
    
 E-Mail:
 belger@bjoernsen.de
 schlienger@bjoernsen.de
 v.doemming@tuhh.de
    
 --------------------------------------------------------------------------*/

package org.kalypso.ogc.sensor.diagview.jfreechart;

import java.text.DecimalFormat;

import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.TickUnitSource;
import org.jfree.chart.axis.TickUnits;
import org.jfree.data.Range;

/**
 * A 'boolean' axis. IN reality this is still a number axis, but renders 'true' for value bigger than 0.5 and 'false'
 * for values smaller than 0.5; works with the XYCurveSerie that returns 1 for <code>true</code> and 0 for <code>false</code>.
 * 
 * @author Gernot Belger
 */
public class PolderControlAxis extends NumberAxis {
    public PolderControlAxis(final String label) {
        super(label);

        final TickUnitSource tickUnits = createBooleanTickUnits();
        setStandardTickUnits(tickUnits);
    }

    @Override
    protected void autoAdjustRange() {
        setRange(new Range(0.0, 3), true, true);
    }

    /**
     * Returns a collection of tick units for boolean values (i.e. only 0 and 1).
     * 
     * @return a collection of tick units for integer values.
     */
    public static TickUnitSource createBooleanTickUnits() {
        final TickUnits units = new TickUnits();

        final NumberTickUnit unit = new NumberTickUnit(1, new DecimalFormat("0")) //$NON-NLS-1$
        {
            /**
             * @see org.jfree.chart.axis.NumberTickUnit#valueToString(double)
             */
            @Override
            public String valueToString(final double value) {
                if (value > 1.5)
                    return ""; //$NON-NLS-1$

                if (value < 0.5)
                    return "zu"; //$NON-NLS-1$

                return "auf"; //$NON-NLS-1$
            }
        };

        units.add(unit);

        return units;
    }
}