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src/java.desktop/share/classes/javax/swing/AbstractSpinnerModel.java

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  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javax.swing;
  27 
  28 import java.util.*;
  29 import javax.swing.event.*;
  30 import java.io.Serializable;
  31 
  32 
  33 /**
  34  * This class provides the ChangeListener part of the
  35  * SpinnerModel interface that should be suitable for most concrete SpinnerModel
  36  * implementations.  Subclasses must provide an implementation of the
  37  * <code>setValue</code>, <code>getValue</code>, <code>getNextValue</code> and
  38  * <code>getPreviousValue</code> methods.
  39  *
  40  * @see JSpinner
  41  * @see SpinnerModel
  42  * @see SpinnerListModel
  43  * @see SpinnerNumberModel
  44  * @see SpinnerDateModel
  45  *
  46  * @author Hans Muller
  47  * @since 1.4
  48  */
  49 @SuppressWarnings("serial") // Field contents are not serializable across versions
  50 public abstract class AbstractSpinnerModel implements SpinnerModel, Serializable
  51 {
  52 
  53     /**
  54      * Only one ChangeEvent is needed per model instance since the
  55      * event's only (read-only) state is the source property.  The source
  56      * of events generated here is always "this".
  57      */
  58     private transient ChangeEvent changeEvent = null;


  74      * @see SpinnerModel#addChangeListener
  75      */
  76     public void addChangeListener(ChangeListener l) {
  77         listenerList.add(ChangeListener.class, l);
  78     }
  79 
  80 
  81     /**
  82      * Removes a ChangeListener from the model's listener list.
  83      *
  84      * @param l the ChangeListener to remove
  85      * @see #addChangeListener
  86      * @see SpinnerModel#removeChangeListener
  87      */
  88     public void removeChangeListener(ChangeListener l) {
  89         listenerList.remove(ChangeListener.class, l);
  90     }
  91 
  92 
  93     /**
  94      * Returns an array of all the <code>ChangeListener</code>s added
  95      * to this AbstractSpinnerModel with addChangeListener().
  96      *
  97      * @return all of the <code>ChangeListener</code>s added or an empty
  98      *         array if no listeners have been added
  99      * @since 1.4
 100      */
 101     public ChangeListener[] getChangeListeners() {
 102         return listenerList.getListeners(ChangeListener.class);
 103     }
 104 
 105 
 106     /**
 107      * Run each ChangeListeners stateChanged() method.
 108      *
 109      * @see #setValue
 110      * @see EventListenerList
 111      */
 112     protected void fireStateChanged()
 113     {
 114         Object[] listeners = listenerList.getListenerList();
 115         for (int i = listeners.length - 2; i >= 0; i -=2 ) {
 116             if (listeners[i] == ChangeListener.class) {
 117                 if (changeEvent == null) {




  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javax.swing;
  27 
  28 import java.util.*;
  29 import javax.swing.event.*;
  30 import java.io.Serializable;
  31 
  32 
  33 /**
  34  * This class provides the ChangeListener part of the
  35  * SpinnerModel interface that should be suitable for most concrete SpinnerModel
  36  * implementations.  Subclasses must provide an implementation of the
  37  * {@code setValue}, {@code getValue}, {@code getNextValue} and
  38  * {@code getPreviousValue} methods.
  39  *
  40  * @see JSpinner
  41  * @see SpinnerModel
  42  * @see SpinnerListModel
  43  * @see SpinnerNumberModel
  44  * @see SpinnerDateModel
  45  *
  46  * @author Hans Muller
  47  * @since 1.4
  48  */
  49 @SuppressWarnings("serial") // Field contents are not serializable across versions
  50 public abstract class AbstractSpinnerModel implements SpinnerModel, Serializable
  51 {
  52 
  53     /**
  54      * Only one ChangeEvent is needed per model instance since the
  55      * event's only (read-only) state is the source property.  The source
  56      * of events generated here is always "this".
  57      */
  58     private transient ChangeEvent changeEvent = null;


  74      * @see SpinnerModel#addChangeListener
  75      */
  76     public void addChangeListener(ChangeListener l) {
  77         listenerList.add(ChangeListener.class, l);
  78     }
  79 
  80 
  81     /**
  82      * Removes a ChangeListener from the model's listener list.
  83      *
  84      * @param l the ChangeListener to remove
  85      * @see #addChangeListener
  86      * @see SpinnerModel#removeChangeListener
  87      */
  88     public void removeChangeListener(ChangeListener l) {
  89         listenerList.remove(ChangeListener.class, l);
  90     }
  91 
  92 
  93     /**
  94      * Returns an array of all the {@code ChangeListener}s added
  95      * to this AbstractSpinnerModel with addChangeListener().
  96      *
  97      * @return all of the {@code ChangeListener}s added or an empty
  98      *         array if no listeners have been added
  99      * @since 1.4
 100      */
 101     public ChangeListener[] getChangeListeners() {
 102         return listenerList.getListeners(ChangeListener.class);
 103     }
 104 
 105 
 106     /**
 107      * Run each ChangeListeners stateChanged() method.
 108      *
 109      * @see #setValue
 110      * @see EventListenerList
 111      */
 112     protected void fireStateChanged()
 113     {
 114         Object[] listeners = listenerList.getListenerList();
 115         for (int i = listeners.length - 2; i >= 0; i -=2 ) {
 116             if (listeners[i] == ChangeListener.class) {
 117                 if (changeEvent == null) {


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