/*
* RangePolicyFixedViewport.java, <enter purpose here>.
* Copyright (c) 2004 - 2011 Achim Westermann, Achim.Westermann@gmx.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., 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
*/
package info.monitorenter.gui.chart.rangepolicies;
import info.monitorenter.util.Range;
/**
* A range policy that forces the chart always to display the constructor given
* point regardless of the actual bounds of the traces within the chart.
* <p>
*
* @author <a href="mailto:Achim.Westermann@gmx.de">Achim Westermann </a>
*
* @version $Revision: 1.8 $
*
*/
public final class RangePolicyForcedPoint extends RangePolicyMinimumViewport {
/** Generated <code>serialVersionUID</code>. */
private static final long serialVersionUID = 5676959746627361093L;
/**
* Creates a range policy that ensures zero to be visible.
* <p>
*/
public RangePolicyForcedPoint() {
super(new Range(0, 0));
}
/**
* Creates a range policy backed by the given point in the dimension this
* policy is used (x or y).
* <p>
*
* @param point
* the point that always has to be shown.
*/
public RangePolicyForcedPoint(final double point) {
super(new Range(point, point));
}
/**
* Sets the point to ensure to be visible.
* <p>
*
* @param point
* the point to ensure to be visible.
*/
public void setPoint(final double point) {
super.setRange(new Range(point, point));
}
/**
* This method is an invariant of the super class contract: only the minimum
* value of the given range is used to enforce visibility.
* <p>
*
* Use {@link #setPoint(double)} instead.
*
* @param range
* the internal range that may be taken into account for returning
* bounds from
* {@link info.monitorenter.gui.chart.IRangePolicy#getMax(double, double)}
* and
* {@link info.monitorenter.gui.chart.IRangePolicy#getMax(double, double)}.
*/
@Override
public void setRange(final Range range) {
double min = range.getMin();
if (min != range.getMax()) {
super.setRange(new Range(min, min));
} else {
super.setRange(range);
}
}
}