/* TabbedPaneUI.java --
   Copyright (C) 2002, 2003, 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.plaf;

import java.awt.Rectangle;

import javax.swing.JTabbedPane;

/**
 * An abstract base class for delegates that implement the pluggable
 * look and feel for a <code>JTabbedPane</code>.
 *
 * @see javax.swing.JTabbedPane
 *
 * @author Andrew Selkirk (aselkirk@sympatico.ca)
 * @author Sascha Brawer (brawer@dandelis.ch)
 */
public abstract class TabbedPaneUI extends ComponentUI
{
  /**
   * Constructs a new <code>TabbedPaneUI</code>.
   */
  public TabbedPaneUI()
  {
    // Nothing to do here.
  }


  /**
   * Determines which tab lies at a given position.
   *
   * @param pane the <code>JTabbedPane</code> for which this
   *        delegate object provides the user interface.
   *
   * @param x the horizontal position, where zero is the left
   *        edge of <code>pane</code>.
   *
   * @param y the vertical position, where zero is the top
   *        edge of <code>pane</code>.
   *
   * @return the zero-based index of the tab, or -1 if no
   *         tab is at the specified position.
   */
  public abstract int tabForCoordinate(JTabbedPane pane,
                                       int x, int y);


  /**
   * Calculates the bounding box of a tab.
   *
   * @param pane the <code>JTabbedPane</code> for which this
   *        delegate object provides the user interface.
   *
   * @param index the index of the tab, which must be an integer
   *        in the range <code>[0 .. pane.getTabCount() - 1]</code>.
   *
   * @return the bounding box of the <code>index</code>-th tab,
   *         in the coordinate system of <code>pane</code>.
   */
  public abstract Rectangle getTabBounds(JTabbedPane pane, int index);


  /**
   * Determines how many runs are used to display tabs.
   *
   * @param pane the <code>JTabbedPane</code> for which this
   *        delegate object provides the user interface.
   *
   * @return the number of tab runs.
   *
   * @see javax.swing.JTabbedPane#getTabRunCount()
   */
  public abstract int getTabRunCount(JTabbedPane pane);
}
