61341707b3
From-SVN: r86958
242 lines
6.9 KiB
Java
242 lines
6.9 KiB
Java
/* SpinnerNumberModel.java --
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Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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/**
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* SpinnerNumberModel
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*
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* @author Ka-Hing Cheung
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* @version 1.0
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*/
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public class SpinnerNumberModel extends AbstractSpinnerModel
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{
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/** DOCUMENT ME! */
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private Number value;
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/** DOCUMENT ME! */
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private Comparable minimum;
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/** DOCUMENT ME! */
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private Comparable maximum;
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/** DOCUMENT ME! */
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private Number stepSize;
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/**
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* Creates a <code>SpinnerNumberModel</code> with initial value 0, step 1,
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* and no maximum nor minimum.
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*/
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public SpinnerNumberModel()
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{
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this(new Integer(0), null, null, new Integer(1));
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}
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/**
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* Creates a <code>SpinnerNumberModel</code> with double precision
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*
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* @param value the initial value
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* @param minimum the minimum value
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* @param maximum the maximum value
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* @param stepSize the step size
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*/
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public SpinnerNumberModel(double value, double minimum, double maximum,
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double stepSize)
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{
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this(new Double(value), new Double(minimum), new Double(maximum),
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new Double(stepSize));
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}
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/**
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* Creates a <code>SpinnerNumberModel</code> with integer precision
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*
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* @param value the initial value
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* @param minimum the minimum value
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* @param maximum the maximum value
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* @param stepSize the step size
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*/
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public SpinnerNumberModel(int value, int minimum, int maximum, int stepSize)
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{
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this(new Integer(value), new Integer(minimum), new Integer(maximum),
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new Integer(stepSize));
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}
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/**
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* Creates a <code>SpinnerNumberModel</code> with <code>Number</code>s and
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* <code>Comparable</code>s.
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*
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* @param value the initial value
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* @param minimum the minimum value, if null there's no minimum
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* @param maximum the maximum value, if null there's no maximum
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* @param stepSize the step size
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*
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* @throws IllegalArgumentException if minimum <= value <= maximum
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* does not hold
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*/
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public SpinnerNumberModel(Number value, Comparable minimum,
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Comparable maximum, Number stepSize)
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{
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if (stepSize == null)
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throw new IllegalArgumentException("stepSize may not be null");
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if (value == null)
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throw new IllegalArgumentException("value may not be null");
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if (minimum != null)
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{
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if (minimum.compareTo(value) > 0)
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throw new IllegalArgumentException("minimum is not <= value");
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}
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else
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minimum = new Comparable()
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{
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public int compareTo(Object obj)
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{
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return -1;
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}
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};
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if (maximum != null)
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{
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if (maximum.compareTo(value) < 0)
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throw new IllegalArgumentException("maximum is not >= value");
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}
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else
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maximum = new Comparable()
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{
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public int compareTo(Object obj)
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{
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return 1;
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}
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};
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this.value = value;
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this.stepSize = stepSize;
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this.minimum = minimum;
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this.maximum = maximum;
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}
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/**
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* Sets the new value and fire a change event
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*
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* @param value the new value
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*
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* @throws IllegalArgumentException if minimum <= value <= maximum
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* does not hold
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*/
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public void setValue(Object value)
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{
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if (! (value instanceof Number))
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throw new IllegalArgumentException("value must be a Number");
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this.value = (Number) value;
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fireStateChanged();
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}
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/**
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* Gets the current value
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*
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* @return the current value
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*/
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public Object getValue()
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{
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return value;
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}
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/**
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* Gets the next value without changing the current value, or null if the
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* current value is maximum.
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*
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* @return the next value
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*/
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public Object getNextValue()
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{
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Number num;
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if (value instanceof Double)
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num = new Double(value.doubleValue() + stepSize.doubleValue());
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else if (value instanceof Float)
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num = new Double(value.floatValue() + stepSize.floatValue());
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else if (value instanceof Long)
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num = new Long(value.longValue() + stepSize.longValue());
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else if (value instanceof Integer)
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num = new Integer(value.intValue() + stepSize.intValue());
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else if (value instanceof Short)
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num = new Short((short) (value.shortValue() + stepSize.shortValue()));
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else
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num = new Byte((byte) (value.byteValue() + stepSize.byteValue()));
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return maximum.compareTo(num) >= 0 ? num : null;
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}
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/**
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* Gets the previous value without changing the current value, or null if
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* the current value is minimum.
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*
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* @return the previous value
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*/
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public Object getPreviousValue()
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{
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Number num;
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if (value instanceof Double)
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num = new Double(value.doubleValue() - stepSize.doubleValue());
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else if (value instanceof Float)
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num = new Double(value.floatValue() - stepSize.floatValue());
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else if (value instanceof Long)
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num = new Long(value.longValue() - stepSize.longValue());
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else if (value instanceof Integer)
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num = new Integer(value.intValue() - stepSize.intValue());
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else if (value instanceof Short)
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num = new Short((short) (value.shortValue() - stepSize.shortValue()));
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else
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num = new Byte((byte) (value.byteValue() - stepSize.byteValue()));
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return minimum.compareTo(num) <= 0 ? num : null;
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}
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/**
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* DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*/
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public Number getNumber()
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{
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return value;
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}
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}
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