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-/* SpinnerNumberModel.java --
- Copyright (C) 2002, 2004, 2006 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-package javax.swing;
-
-import java.io.Serializable;
-
-import javax.swing.event.ChangeEvent;
-
-/**
- * A model used by the {@link JSpinner} component.
- *
- * @author Ka-Hing Cheung
- * @since 1.4
- */
-public class SpinnerNumberModel extends AbstractSpinnerModel
- implements Serializable
-{
- /**
- * For compatability with Sun's JDK
- */
- private static final long serialVersionUID = 7279176385485777821L;
-
- /** The current value. */
- private Number value;
-
- /** The minimum value (or <code>null</code>). */
- private Comparable minimum;
-
- /** The maximum value (or <code>null</code>). */
- private Comparable maximum;
-
- /** The step size. */
- private Number stepSize;
-
- /**
- * Creates a <code>SpinnerNumberModel</code> with initial value 0, step 1,
- * and no maximum nor minimum.
- */
- public SpinnerNumberModel()
- {
- this(new Integer(0), null, null, new Integer(1));
- }
-
- /**
- * Creates a <code>SpinnerNumberModel</code> with double precision.
- *
- * @param value the initial value
- * @param minimum the minimum value
- * @param maximum the maximum value
- * @param stepSize the step size
- * @throws IllegalArgumentException if minimum &lt;= value &lt;= maximum does
- * not hold.
- */
- public SpinnerNumberModel(double value, double minimum, double maximum,
- double stepSize)
- {
- this(new Double(value), new Double(minimum), new Double(maximum),
- new Double(stepSize));
- }
-
- /**
- * Creates a <code>SpinnerNumberModel</code> with integer precision.
- *
- * @param value the initial value
- * @param minimum the minimum value
- * @param maximum the maximum value
- * @param stepSize the step size
- * @throws IllegalArgumentException if minimum &lt;= value &lt;= maximum does
- * not hold.
- */
- public SpinnerNumberModel(int value, int minimum, int maximum, int stepSize)
- {
- this(new Integer(value), new Integer(minimum), new Integer(maximum),
- new Integer(stepSize));
- }
-
- /**
- * Creates a <code>SpinnerNumberModel</code> with the given attributes. The
- * caller should ensure that both <code>minimum</code> and
- * <code>maximum</code> are serializable.
- *
- * @param value the initial value (<code>null</code> not permitted).
- * @param minimum the minimum value (<code>null</code> permitted).
- * @param maximum the maximum value (<code>null</code> permitted).
- * @param stepSize the step size (<code>null</code> not permitted).
- *
- * @throws IllegalArgumentException if minimum &lt;= value &lt;= maximum
- * does not hold
- * @throws IllegalArgumentException if <code>value</code> is
- * <code>null</code>.
- * @throws IllegalArgumentException if <code>stepSize</code> is
- * <code>null</code>.
- */
- public SpinnerNumberModel(Number value, Comparable minimum,
- Comparable maximum, Number stepSize)
- {
- if (stepSize == null)
- throw new IllegalArgumentException("stepSize may not be null");
- if (value == null)
- throw new IllegalArgumentException("value may not be null");
- if (minimum != null)
- {
- if (minimum.compareTo(value) > 0)
- throw new IllegalArgumentException("minimum is not <= value");
- }
- if (maximum != null)
- {
- if (maximum.compareTo(value) < 0)
- throw new IllegalArgumentException("maximum is not >= value");
- }
-
- this.value = value;
- this.stepSize = stepSize;
- this.minimum = minimum;
- this.maximum = maximum;
- }
-
- /**
- * Sets the current value and, if the new value is different to the old
- * value, sends a {@link ChangeEvent} to all registered listeners.
- *
- * @param value the new value (<code>null</code> not permitted, must be an
- * instance of <code>Number</code>).
- *
- * @throws IllegalArgumentException if <code>value</code> is not an instance
- * of <code>Number</code>.
- */
- public void setValue(Object value)
- {
- if (! (value instanceof Number))
- throw new IllegalArgumentException("value must be a Number");
-
- if (!this.value.equals(value))
- {
- this.value = (Number) value;
- fireStateChanged();
- }
- }
-
- /**
- * Returns the current value, which for this class is always an instance of
- * {@link Number}.
- *
- * @return The current value.
- *
- * @see #getNumber()
- */
- public Object getValue()
- {
- return value;
- }
-
- /**
- * Returns the next value, or <code>null</code> if adding the step size to
- * the current value results in a value greater than the maximum value.
- * The current value is not changed.
- *
- * @return The next value, or <code>null</code> if the current value is the
- * maximum value represented by this model.
- */
- public Object getNextValue()
- {
- Number num;
-
- if (value instanceof Double)
- num = new Double(value.doubleValue() + stepSize.doubleValue());
- else if (value instanceof Float)
- num = new Double(value.floatValue() + stepSize.floatValue());
- else if (value instanceof Long)
- num = new Long(value.longValue() + stepSize.longValue());
- else if (value instanceof Integer)
- num = new Integer(value.intValue() + stepSize.intValue());
- else if (value instanceof Short)
- num = new Short((short) (value.shortValue() + stepSize.shortValue()));
- else
- num = new Byte((byte) (value.byteValue() + stepSize.byteValue()));
-
- // check upper bound if set
- if ((maximum != null) && maximum.compareTo(num) < 0)
- num = null;
-
- return num;
- }
-
- /**
- * Returns the previous value, or <code>null</code> if subtracting the
- * step size from the current value results in a value less than the minimum
- * value. The current value is not changed.
- *
- * @return The previous value, or <code>null</code> if the current value
- * is the minimum value represented by this model.
- */
- public Object getPreviousValue()
- {
- Number num;
-
- if (value instanceof Double)
- num = new Double(value.doubleValue() - stepSize.doubleValue());
- else if (value instanceof Float)
- num = new Double(value.floatValue() - stepSize.floatValue());
- else if (value instanceof Long)
- num = new Long(value.longValue() - stepSize.longValue());
- else if (value instanceof Integer)
- num = new Integer(value.intValue() - stepSize.intValue());
- else if (value instanceof Short)
- num = new Short((short) (value.shortValue() - stepSize.shortValue()));
- else
- num = new Byte((byte) (value.byteValue() - stepSize.byteValue()));
-
- // check lower bound if set
- if ((minimum != null) && minimum.compareTo(num) > 0)
- num = null;
-
- return num;
- }
-
- /**
- * Returns the current value.
- *
- * @return The current value.
- */
- public Number getNumber()
- {
- return value;
- }
-
- /**
- * Returns the minimum value, or <code>null</code> if there is no minimum.
- *
- * @return The minimum value.
- *
- * @see #setMinimum(Comparable)
- */
- public Comparable getMinimum()
- {
- return minimum;
- }
-
- /**
- * Sets the minimum value and, if the new value is different to the old
- * value, sends a {@link ChangeEvent} to all registered listeners. A
- * <code>null</code> value is interpreted as "no minimum value". No check
- * is made to ensure that the new minimum is less than or equal to the
- * current value, the caller is responsible for ensuring that this
- * relationship holds. In addition, the caller should ensure that
- * <code>newMinimum</code> is {@link Serializable}.
- *
- * @param newMinimum the new minimum value (<code>null</code> permitted).
- *
- * @see #getMinimum()
- */
- public void setMinimum(Comparable newMinimum)
- {
- if (minimum != null ? !minimum.equals(newMinimum) : newMinimum != null)
- {
- minimum = newMinimum;
- fireStateChanged();
- }
- }
-
- /**
- * Returns the maximum value, or <code>null</code> if there is no maximum.
- *
- * @return The maximum value.
- *
- * @see #getMinimum()
- * @see #setMaximum(Comparable)
- */
- public Comparable getMaximum()
- {
- return maximum;
- }
-
- /**
- * Sets the maximum value and, if the new value is different to the old
- * value, sends a {@link ChangeEvent} to all registered listeners. A
- * <code>null</code> value is interpreted as "no maximum value". No check
- * is made to ensure that the new maximum is greater than or equal to the
- * current value, the caller is responsible for ensuring that this
- * relationship holds. In addition, the caller should ensure that
- * <code>newMaximum</code> is {@link Serializable}.
- *
- * @param newMaximum the new maximum (<code>null</code> permitted).
- *
- * @see #getMaximum()
- */
- public void setMaximum(Comparable newMaximum)
- {
- if (maximum != null ? !maximum.equals(newMaximum) : newMaximum != null)
- {
- maximum = newMaximum;
- fireStateChanged();
- }
- }
-
- /**
- * Returns the step size.
- *
- * @return The step size (never <code>null</code>).
- */
- public Number getStepSize()
- {
- return stepSize;
- }
-
- /**
- * Sets the step size and, if the new step size is different to the old
- * step size, sends a {@link ChangeEvent} to all registered listeners.
- *
- * @param newStepSize the new step size (<code>null</code> not permitted).
- *
- * @throws IllegalArgumentException if <code>newStepSize</code> is
- * <code>null</code>.
- */
- public void setStepSize(Number newStepSize)
- {
- if (newStepSize == null)
- throw new IllegalArgumentException();
-
- if (!stepSize.equals(newStepSize))
- {
- stepSize = newStepSize;
- fireStateChanged();
- }
- }
-}