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authortromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4>2005-07-16 00:30:23 +0000
committertromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4>2005-07-16 00:30:23 +0000
commitc8875fb97fc03779a5bba09872227b1d08e5d52a (patch)
treea0b991cf5866ae1d616639b906ac001811d74508 /libjava/classpath/javax/swing/DefaultComboBoxModel.java
parentc40c1730800ed292b6db39a83d592476fa59623c (diff)
downloadppe42-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
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+/* 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);
+ }
+}
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