| /* SpinnerNumberModel.java -- |
| Copyright (C) 2002, 2004 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 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; |
| |
| /** |
| * SpinnerNumberModel |
| * |
| * @author Ka-Hing Cheung |
| * @version 1.0 |
| */ |
| public class SpinnerNumberModel extends AbstractSpinnerModel |
| implements Serializable |
| { |
| /** |
| * For compatability with Sun's JDK |
| */ |
| private static final long serialVersionUID = 7279176385485777821L; |
| |
| /** DOCUMENT ME! */ |
| private Number value; |
| |
| /** DOCUMENT ME! */ |
| private Comparable minimum; |
| |
| /** DOCUMENT ME! */ |
| private Comparable maximum; |
| |
| /** DOCUMENT ME! */ |
| 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 <= value <= 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 <= value <= 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 <code>Number</code>s and |
| * <code>Comparable</code>s. |
| * |
| * @param value the initial value |
| * @param minimum the minimum value, if null there's no minimum |
| * @param maximum the maximum value, if null there's no maximum |
| * @param stepSize the step size |
| * |
| * @throws IllegalArgumentException if minimum <= value <= maximum |
| * does not hold |
| */ |
| 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"); |
| } |
| else |
| minimum = new Comparable() |
| { |
| public int compareTo(Object obj) |
| { |
| return -1; |
| } |
| }; |
| |
| |
| if (maximum != null) |
| { |
| if (maximum.compareTo(value) < 0) |
| throw new IllegalArgumentException("maximum is not >= value"); |
| } |
| else |
| maximum = new Comparable() |
| { |
| public int compareTo(Object obj) |
| { |
| return 1; |
| } |
| }; |
| |
| |
| this.value = value; |
| this.stepSize = stepSize; |
| this.minimum = minimum; |
| this.maximum = maximum; |
| } |
| |
| /** |
| * Sets the new value and fire a change event |
| * |
| * @param value the new value |
| * |
| * @throws IllegalArgumentException if minimum <= value <= maximum |
| * does not hold |
| */ |
| public void setValue(Object value) |
| { |
| if (! (value instanceof Number)) |
| throw new IllegalArgumentException("value must be a Number"); |
| |
| this.value = (Number) value; |
| fireStateChanged(); |
| } |
| |
| /** |
| * Gets the current value |
| * |
| * @return the current value |
| */ |
| public Object getValue() |
| { |
| return value; |
| } |
| |
| /** |
| * Gets the next value without changing the current value, or null if the |
| * current value is maximum. |
| * |
| * @return the next value |
| */ |
| 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())); |
| |
| return maximum.compareTo(num) >= 0 ? num : null; |
| } |
| |
| /** |
| * Gets the previous value without changing the current value, or null if |
| * the current value is minimum. |
| * |
| * @return the previous value |
| */ |
| 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())); |
| |
| return minimum.compareTo(num) <= 0 ? num : null; |
| } |
| |
| /** |
| * DOCUMENT ME! |
| * |
| * @return DOCUMENT ME! |
| */ |
| public Number getNumber() |
| { |
| return value; |
| } |
| |
| public Comparable getMinimum() |
| { |
| return minimum; |
| } |
| |
| public void setMinimum(Comparable newMinimum) |
| { |
| if (minimum != newMinimum) |
| { |
| minimum = newMinimum; |
| fireStateChanged(); |
| } |
| } |
| |
| public Comparable getMaximum() |
| { |
| return maximum; |
| } |
| |
| public void setMaximum(Comparable newMaximum) |
| { |
| if (maximum != newMaximum) |
| { |
| maximum = newMaximum; |
| fireStateChanged(); |
| } |
| } |
| |
| public Number getStepSize() |
| { |
| return stepSize; |
| } |
| |
| public void setStepSize(Number newStepSize) |
| { |
| if (newStepSize == null) |
| throw new IllegalArgumentException(); |
| |
| if (stepSize != newStepSize) |
| { |
| stepSize = newStepSize; |
| fireStateChanged(); |
| } |
| } |
| } |