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author | tromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-07-16 00:30:23 +0000 |
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committer | tromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-07-16 00:30:23 +0000 |
commit | c8875fb97fc03779a5bba09872227b1d08e5d52a (patch) | |
tree | a0b991cf5866ae1d616639b906ac001811d74508 /libjava/classpath/javax/swing/DefaultComboBoxModel.java | |
parent | c40c1730800ed292b6db39a83d592476fa59623c (diff) | |
download | ppe42-gcc-c8875fb97fc03779a5bba09872227b1d08e5d52a.tar.gz ppe42-gcc-c8875fb97fc03779a5bba09872227b1d08e5d52a.zip |
Initial revision
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102074 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libjava/classpath/javax/swing/DefaultComboBoxModel.java')
-rw-r--r-- | libjava/classpath/javax/swing/DefaultComboBoxModel.java | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/DefaultComboBoxModel.java b/libjava/classpath/javax/swing/DefaultComboBoxModel.java new file mode 100644 index 00000000000..1cea886b793 --- /dev/null +++ b/libjava/classpath/javax/swing/DefaultComboBoxModel.java @@ -0,0 +1,238 @@ +/* DefaultComboBoxModel.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., 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 java.util.Arrays; +import java.util.Vector; + + +/** + * DefaultComboBoxModel is a data model for JComboBox. This model keeps track + * of elements contained in the JComboBox as well as the current combo box + * selection. Whenever selection in the JComboBox changes, the ComboBoxModel + * will fire ListDataEvents to ComboBox's ListDataListeners. + * + * @author Andrew Selkirk + * @author Olga Rodimina + * @author Robert Schuster + * @version 1.0 + */ +public class DefaultComboBoxModel extends AbstractListModel + implements MutableComboBoxModel, Serializable +{ + private static final long serialVersionUID = 6698657703676921904L; + + /** + * List containing items in the combo box + */ + private Vector list; + + /** + * Currently selected item in the combo box list + */ + private Object selectedItem = null; + + /** + * Constructor DefaultComboBoxModel. Create empty JComboBox. + */ + public DefaultComboBoxModel() + { + list = new Vector(); + } + + /** + * Constructs new DefaultComboBoxModel object and initializes its item list + * to values in the given array. + * + * @param items array containing items of the combo box. + */ + public DefaultComboBoxModel(Object[] items) + { + list = new Vector(Arrays.asList(items)); + } + + /** + * Consturcts new DefaultComboBoxModel object and initializes its item list + * to values in the given vector. + * + * @param vector Vector containing items for this combo box. + */ + public DefaultComboBoxModel(Vector vector) + { + this.list = vector; + } + + /** + * This method adds element to the combo box list. It fires ListDataEvent + * indicating that component was added to the combo box to all of the + * JComboBox's registered ListDataListeners. + * + * @param object item to add to the combo box list + */ + public void addElement(Object object) + { + list.add(object); + fireIntervalAdded(this, list.size() - 1, list.size()); + } + + /** + * This method removes element at the specified index from the combo box + * list. It fires ListDataEvent indicating that component was removed from + * the combo box list to all of the JComboBox's registered + * ListDataListeners. + * + * @param index index specifying location of the element to remove in the + * combo box list. + */ + public void removeElementAt(int index) + { + list.remove(index); + fireIntervalRemoved(this, index, index); + } + + /** + * This method inserts given object to the combo box list at the specified + * index. It fires ListDataEvent indicating that component was inserted to + * the combo box list to all of the JComboBox's registered + * ListDataListeners. + * + * @param object element to insert + * @param index index specifing position in the list where given element + * should be inserted. + */ + public void insertElementAt(Object object, int index) + { + list.insertElementAt(object, index); + fireIntervalAdded(this, index, index); + } + + /** + * Removes given object from the combo box list. It fires ListDataEvent + * indicating that component was removed from the combo box list to all of + * the JComboBox's registered ListDataListeners. + * + * @param object Element that will be removed from the combo box list + */ + public void removeElement(Object object) + { + int index = getIndexOf(object); + if (index != -1) + removeElementAt(index); + } + + /** + * Removes all the items from the JComboBox's item list. It fires + * ListDataEvent indicating that all the elements were removed from the + * combo box list to all of the JComboBox's registered ListDataListeners. + */ + public void removeAllElements() + { + list.clear(); + int listSize = getSize(); + fireIntervalAdded(this, 0, listSize); + } + + /** + * Returns number of items in the combo box list + * + * @return number of items in the combo box list + */ + public int getSize() + { + return list.size(); + } + + /** + * Selects given object in the combo box list. This method fires + * ListDataEvent to all registered ListDataListeners of the JComboBox. The + * start and end index of the event is set to -1 to indicate combo box's + * selection has changed, and not its contents. + * + * <p>If the given object is not contained in the combo box list then nothing + * happens.</p> + * + * @param object item to select in the JComboBox + */ + public void setSelectedItem(Object object) + { + + // Updates the selected item only if the given object + // is null or in the list (this is how the JDK behaves). + if(object == null || list.contains(object)) { + selectedItem = object; + fireContentsChanged(this, -1, -1); + } + + } + + /** + * Returns currently selected item in the combo box list + * + * @return currently selected item in the combo box list + */ + public Object getSelectedItem() + { + return selectedItem; + } + + /** + * Returns element in the combo box list located at the given index + * + * @param index specifying location of the element in the list + * + * @return return element in the combo box list located at the given index + */ + public Object getElementAt(int index) + { + return list.elementAt(index); + } + + /** + * Returns index of the specified object in the combo box list. + * + * @param object element to look for in the combo box list . + * + * @return Index specifying position of the specified element in combo box + * list. + */ + public int getIndexOf(Object object) + { + return list.indexOf(object); + } +} |