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+/* ListUI.java --
+   Copyright (C) 2002, 2003, 2004, 2005  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.plaf;
+
+import java.awt.Point;
+import java.awt.Rectangle;
+
+import javax.swing.JList;
+
+/**
+ * An abstract base class for delegates that implement the pluggable
+ * look and feel for a <code>JList</code>.
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class ListUI extends ComponentUI
+{
+  /**
+   * Constructs a new <code>ListUI</code>.
+   */
+  public ListUI()
+  {
+    // Nothing to do here.
+  }
+
+
+  /**
+   * Determines the cell index which is the closest to the specified
+   * location. The find out whether the returned cell actually
+   * contains the location, the caller should also use {@link
+   * #getCellBounds}.
+   *
+   * @param list the <code>JList</code> for which this delegate object
+   *        provides the pluggable user interface.
+   *
+   * @param location a point in the <code>JList</code> coordinate
+   *        system.
+   *
+   * @return the index of the closest cell, or -1 if the list model
+   *         is empty.
+   */
+  public abstract int locationToIndex(JList list, Point location);
+
+
+  /**
+   * Determines the location of the specified cell.
+   *
+   * @param list the <code>JList</code> for which this delegate object
+   *        provides the pluggable user interface.
+   *
+   * @param index the zero-based index of the cell whose location shall be
+   *        determined.
+   *
+   * @return the position of the top left corner of the cell in the
+   *         <code>JList</code> coordinate system, or <code>null</code>
+   *         if <code>cell</code> does not designate a valid cell.
+   */
+  public abstract Point indexToLocation(JList list, int index);
+
+
+  /**
+   * Determines the bounding box of the rectangle spanned by
+   * two list indices.
+   *
+   * @param list the <code>JList</code> for which this delegate object
+   *        provides the pluggable user interface.
+   *
+   * @param index1 the zero-based index of the first cell.
+   *
+   * @param index2 the zero-based index of the second cell.
+   *
+   * @return the spanned rectangle, or <code>null</code> if either
+   *         <code>index1</code> or <code>index2</code> does not
+   *         designate a valid cell.
+   */
+  public abstract Rectangle getCellBounds(JList list,
+                                          int index1, int index2);
+}