713 lines
20 KiB
Java
713 lines
20 KiB
Java
/* JScrollPane.java --
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Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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import java.awt.Component;
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import java.awt.ComponentOrientation;
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import java.awt.Insets;
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import java.awt.LayoutManager;
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import java.awt.Rectangle;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.accessibility.Accessible;
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import javax.accessibility.AccessibleContext;
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import javax.swing.border.Border;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import javax.swing.plaf.ScrollPaneUI;
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import javax.swing.plaf.UIResource;
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/**
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* A component that embeds another component and enables it to be scrolled
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* both in horizontal and vertical direction.
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*
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* <table>
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* <tr><th>Property </th><th>Stored in </th><th>Bound?</th></tr>
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* <tr><td>columnHeader </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>columnHeaderView </td><td>columnHeader </td><td>no </td></tr>
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* <tr><td>componentOrientation </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>horizontalScrollBar </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>horizontalScrollBarPolicy </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>layout </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>rowHeader </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>rowHeaderView </td><td>rowHeader </td><td>no </td></tr>
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* <tr><td>validateRoot </td><td>scrollPane </td><td>no </td></tr>
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* <tr><td>verticalScrollBar </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>verticalScrollBarPolicy </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>viewport </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>viewportBorder </td><td>scrollPane </td><td>yes </td></tr>
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* <tr><td>viewportBorderBounds </td><td>scrollPane </td><td>no </td></tr>
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* <tr><td>viewportView </td><td>viewport </td><td>no </td></tr>
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* <tr><td>wheelScrollingEnabled </td><td>scrollPane </td><td>yes </td></tr>
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* </table>
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*/
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public class JScrollPane extends JComponent
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implements Accessible, ScrollPaneConstants
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{
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/**
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* Provides accessibility support for the <code>JScrollPane</code>.
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*
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* @author Roman Kennke (kennke@aicas.com)
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*/
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protected class AccessibleJScrollPane extends AccessibleJComponent
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implements ChangeListener, PropertyChangeListener
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{
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/**
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* The viewport of the underlying scrollpane.
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*/
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protected JViewport viewPort;
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/**
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* Creates a new <code>AccessibleJScrollPane</code> object. This
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* initializes the <code>viewport</code> field with the current viewport
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* from the scrollpane associated with this
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* <code>AccessibleJScrollPane</code>.
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*/
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public AccessibleJScrollPane()
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{
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viewPort = getViewport();
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viewPort.addChangeListener(this);
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viewPort.addPropertyChangeListener(this);
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}
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/**
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* Receives notification when the state of the viewport changes.
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*
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* @param event the change event
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*/
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public void stateChanged(ChangeEvent event)
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{
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// TODO: Figure out what should be done here, if anything.
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}
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/**
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* Receives notification if any of the viewport's bound properties changes.
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*
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* @param e the propery change event
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*/
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public void propertyChange(PropertyChangeEvent e)
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{
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// TODO: Figure out what should be done here, if anything.
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}
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/**
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* Resets the <code>viewPort</code> field when the scrollpane's viewport
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* changes. This method is called by
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* {@link JScrollPane#setViewport(JViewport)} in order to update the
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* <code>viewPort</code> field and set up the listeners on this viewport
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* correctly.
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*/
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public void resetViewPort()
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{
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viewPort.removeChangeListener(this);
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viewPort.removePropertyChangeListener(this);
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viewPort = getViewport();
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viewPort.addChangeListener(this);
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viewPort.addPropertyChangeListener(this);
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}
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}
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private static final long serialVersionUID = 5203525440012340014L;
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protected JViewport columnHeader;
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protected JViewport rowHeader;
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protected Component lowerLeft;
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protected Component lowerRight;
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protected Component upperLeft;
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protected Component upperRight;
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protected JScrollBar horizontalScrollBar;
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protected int horizontalScrollBarPolicy;
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protected JScrollBar verticalScrollBar;
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protected int verticalScrollBarPolicy;
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protected JViewport viewport;
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private Border viewportBorder;
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private boolean wheelScrollingEnabled;
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public JViewport getColumnHeader()
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{
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return columnHeader;
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}
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public Component getCorner(String key)
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{
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if (getComponentOrientation()
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== ComponentOrientation.LEFT_TO_RIGHT)
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{
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if (key == LOWER_LEADING_CORNER)
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key = LOWER_LEFT_CORNER;
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else if (key == LOWER_TRAILING_CORNER)
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key = LOWER_RIGHT_CORNER;
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else if (key == UPPER_LEADING_CORNER)
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key = UPPER_LEFT_CORNER;
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else if (key == UPPER_TRAILING_CORNER)
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key = UPPER_RIGHT_CORNER;
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}
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else if (getComponentOrientation()
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== ComponentOrientation.RIGHT_TO_LEFT)
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{
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if (key == LOWER_LEADING_CORNER)
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key = LOWER_RIGHT_CORNER;
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else if (key == LOWER_TRAILING_CORNER)
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key = LOWER_LEFT_CORNER;
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else if (key == UPPER_LEADING_CORNER)
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key = UPPER_RIGHT_CORNER;
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else if (key == UPPER_TRAILING_CORNER)
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key = UPPER_LEFT_CORNER;
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}
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if (key == LOWER_RIGHT_CORNER)
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return lowerRight;
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else if (key == UPPER_RIGHT_CORNER)
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return upperRight;
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else if (key == LOWER_LEFT_CORNER)
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return lowerLeft;
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else if (key == UPPER_LEFT_CORNER)
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return upperLeft;
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return null;
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}
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public JScrollBar getHorizontalScrollBar()
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{
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return horizontalScrollBar;
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}
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public int getHorizontalScrollBarPolicy()
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{
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return horizontalScrollBarPolicy;
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}
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public JViewport getRowHeader()
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{
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return rowHeader;
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}
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public JScrollBar getVerticalScrollBar()
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{
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return verticalScrollBar;
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}
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public int getVerticalScrollBarPolicy()
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{
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return verticalScrollBarPolicy;
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}
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public JViewport getViewport()
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{
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return viewport;
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}
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public Border getViewportBorder()
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{
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return viewportBorder;
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}
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public Rectangle getViewportBorderBounds()
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{
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if (viewportBorder == null)
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{
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if (getViewport() == null)
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return new Rectangle(0, 0, 0, 0);
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else
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return getViewport().getBounds();
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}
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else
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{
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Insets i = viewportBorder.getBorderInsets(getViewport());
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if (getViewport() == null)
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return new Rectangle(0, 0, i.left + i.right, i.top + i.bottom);
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else
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{
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Rectangle b = getViewport().getBounds();
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return new Rectangle(b.x - i.left,
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b.y - i.top,
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b.width + i.left + i.right,
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b.height + i.top + i.bottom);
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}
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}
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}
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public boolean isWheelScrollingEnabled()
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{
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return wheelScrollingEnabled;
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}
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private void sync()
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{
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LayoutManager m = super.getLayout();
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if (m != null && m instanceof ScrollPaneLayout)
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{
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ScrollPaneLayout sl = (ScrollPaneLayout) m;
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sl.syncWithScrollPane(this);
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}
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}
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private void removeNonNull(Component c)
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{
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if (c != null)
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remove(c);
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}
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private void addNonNull(Component c, Object constraints)
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{
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if (c != null)
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add(c, constraints);
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}
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public void setComponentOrientation(ComponentOrientation co)
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{
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ComponentOrientation old = super.getComponentOrientation();
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super.setComponentOrientation(co);
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firePropertyChange("componentOrientation", old, co);
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sync();
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}
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public void setColumnHeader(JViewport h)
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{
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if (columnHeader == h)
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return;
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JViewport old = columnHeader;
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removeNonNull(old);
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columnHeader = h;
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addNonNull(h, JScrollPane.COLUMN_HEADER);
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firePropertyChange("columnHeader", old, h);
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sync();
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}
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public void setColumnHeaderView(Component c)
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{
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if (columnHeader == null)
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setColumnHeader(createViewport());
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columnHeader.setView(c);
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sync();
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}
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public void setCorner(String key, Component c)
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{
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if (getComponentOrientation()
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== ComponentOrientation.LEFT_TO_RIGHT)
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{
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if (key == LOWER_LEADING_CORNER)
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key = LOWER_LEFT_CORNER;
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else if (key == LOWER_TRAILING_CORNER)
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key = LOWER_RIGHT_CORNER;
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else if (key == UPPER_LEADING_CORNER)
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key = UPPER_LEFT_CORNER;
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else if (key == UPPER_TRAILING_CORNER)
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key = UPPER_RIGHT_CORNER;
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}
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else if (getComponentOrientation()
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== ComponentOrientation.RIGHT_TO_LEFT)
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{
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if (key == LOWER_LEADING_CORNER)
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key = LOWER_RIGHT_CORNER;
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else if (key == LOWER_TRAILING_CORNER)
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key = LOWER_LEFT_CORNER;
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else if (key == UPPER_LEADING_CORNER)
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key = UPPER_RIGHT_CORNER;
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else if (key == UPPER_TRAILING_CORNER)
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key = UPPER_LEFT_CORNER;
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}
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if (key == LOWER_RIGHT_CORNER)
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{
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removeNonNull(lowerRight);
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lowerRight = c;
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addNonNull(c, JScrollPane.LOWER_RIGHT_CORNER);
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}
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else if (key == UPPER_RIGHT_CORNER)
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{
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removeNonNull(upperRight);
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upperRight = c;
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addNonNull(c, JScrollPane.UPPER_RIGHT_CORNER);
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}
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else if (key == LOWER_LEFT_CORNER)
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{
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removeNonNull(lowerLeft);
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lowerLeft = c;
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addNonNull(c, JScrollPane.LOWER_LEFT_CORNER);
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}
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else if (key == UPPER_LEFT_CORNER)
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{
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removeNonNull(upperLeft);
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upperLeft = c;
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addNonNull(c, JScrollPane.UPPER_LEFT_CORNER);
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}
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else
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throw new IllegalArgumentException("unknown corner " + key);
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sync();
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}
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public void setHorizontalScrollBar(JScrollBar h)
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{
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if (horizontalScrollBar == h)
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return;
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JScrollBar old = horizontalScrollBar;
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removeNonNull(old);
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horizontalScrollBar = h;
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addNonNull(h, JScrollPane.HORIZONTAL_SCROLLBAR);
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firePropertyChange("horizontalScrollBar", old, h);
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sync();
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}
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public void setHorizontalScrollBarPolicy(int h)
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{
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if (horizontalScrollBarPolicy == h)
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return;
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if (h != HORIZONTAL_SCROLLBAR_AS_NEEDED
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&& h != HORIZONTAL_SCROLLBAR_NEVER
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&& h != HORIZONTAL_SCROLLBAR_ALWAYS)
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throw new IllegalArgumentException("unknown horizontal scrollbar policy");
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int old = horizontalScrollBarPolicy;
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horizontalScrollBarPolicy = h;
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firePropertyChange("horizontalScrollBarPolicy", old, h);
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sync();
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revalidate();
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}
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public void setLayout(LayoutManager l)
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{
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LayoutManager old = super.getLayout();
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ScrollPaneLayout tmp = (ScrollPaneLayout) l;
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super.setLayout(l);
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tmp.syncWithScrollPane(this);
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firePropertyChange("layout", old, l);
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sync();
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}
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public void setRowHeader(JViewport v)
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{
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if (rowHeader == v)
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return;
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JViewport old = rowHeader;
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removeNonNull(old);
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rowHeader = v;
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addNonNull(v, JScrollPane.ROW_HEADER);
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firePropertyChange("rowHeader", old, v);
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sync();
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}
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public void setRowHeaderView(Component c)
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{
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if (rowHeader == null)
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setRowHeader(createViewport());
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rowHeader.setView(c);
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sync();
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}
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public void setVerticalScrollBar(JScrollBar v)
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{
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if (verticalScrollBar == v)
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return;
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JScrollBar old = verticalScrollBar;
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removeNonNull(old);
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verticalScrollBar = v;
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addNonNull(v, JScrollPane.VERTICAL_SCROLLBAR);
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firePropertyChange("verticalScrollBar", old, v);
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sync();
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}
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public void setVerticalScrollBarPolicy(int v)
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{
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if (verticalScrollBarPolicy == v)
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return;
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if (v != VERTICAL_SCROLLBAR_AS_NEEDED
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&& v != VERTICAL_SCROLLBAR_NEVER
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&& v != VERTICAL_SCROLLBAR_ALWAYS)
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throw new IllegalArgumentException("unknown vertical scrollbar policy");
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int old = verticalScrollBarPolicy;
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verticalScrollBarPolicy = v;
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firePropertyChange("verticalScrollBarPolicy", old, v);
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sync();
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revalidate();
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}
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public void setWheelScrollingEnabled(boolean b)
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{
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if (wheelScrollingEnabled == b)
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return;
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boolean old = wheelScrollingEnabled;
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wheelScrollingEnabled = b;
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firePropertyChange("wheelScrollingEnabled", old, b);
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sync();
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}
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public void setViewport(JViewport v)
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{
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if (viewport == v)
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return;
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JViewport old = viewport;
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removeNonNull(old);
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viewport = v;
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addNonNull(v, JScrollPane.VIEWPORT);
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revalidate();
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repaint();
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firePropertyChange("viewport", old, v);
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sync();
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if (accessibleContext != null)
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{
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AccessibleJScrollPane asp = (AccessibleJScrollPane) accessibleContext;
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asp.resetViewPort();
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}
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}
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public void setViewportBorder(Border b)
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{
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if (viewportBorder == b)
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return;
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Border old = viewportBorder;
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viewportBorder = b;
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firePropertyChange("viewportBorder", old, b);
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sync();
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}
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public void setViewportView(Component view)
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{
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if (getViewport() == null)
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{
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setViewport(createViewport());
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}
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if (view != null)
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{
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getViewport().setView(view);
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}
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sync();
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}
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public boolean isValidateRoot()
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{
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return true;
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}
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/**
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* Creates a new <code>JScrollPane</code> without a view. The scrollbar
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* policy is set to {@link #VERTICAL_SCROLLBAR_AS_NEEDED} and
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* {@link #HORIZONTAL_SCROLLBAR_AS_NEEDED}.
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*/
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public JScrollPane()
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{
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this(null);
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}
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/**
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* Creates a new <code>JScrollPane</code> that embeds the specified
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* <code>view</code> component, displaying vertical and horizontal scrollbars
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* as needed.
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*
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* @param view the component that is embedded inside the JScrollPane
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*/
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public JScrollPane(Component view)
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{
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this(view,
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VERTICAL_SCROLLBAR_AS_NEEDED,
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HORIZONTAL_SCROLLBAR_AS_NEEDED);
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}
|
|
|
|
/**
|
|
* Creates a new <code>JScrollPane</code> without a view; The scrollbar
|
|
* policies are set to <code>vsbPolicy</code> and <code>hsbPolicy</code>.
|
|
*
|
|
* @param vsbPolicy the vertical scrollbar policy to set
|
|
* @param hsbPolicy the vertical scrollbar policy to set
|
|
*
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_ALWAYS
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_AS_NEEDED
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_NEVER
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_ALWAYS
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_AS_NEEDED
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_NEVER
|
|
*/
|
|
public JScrollPane(int vsbPolicy, int hsbPolicy)
|
|
{
|
|
this(null, vsbPolicy, hsbPolicy);
|
|
}
|
|
|
|
/**
|
|
* Creates a new <code>JScrollPane</code> that embeds the specified
|
|
* <code>view</code> component; The scrollbar
|
|
* policies are set to <code>vsbPolicy</code> and <code>hsbPolicy</code>.
|
|
*
|
|
* @param vsbPolicy the vertical scrollbar policy to set
|
|
* @param hsbPolicy the vertical scrollbar policy to set
|
|
*
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_ALWAYS
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_AS_NEEDED
|
|
* @see ScrollPaneConstants#HORIZONTAL_SCROLLBAR_NEVER
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_ALWAYS
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_AS_NEEDED
|
|
* @see ScrollPaneConstants#VERTICAL_SCROLLBAR_NEVER
|
|
*/
|
|
public JScrollPane(Component view, int vsbPolicy, int hsbPolicy)
|
|
{
|
|
wheelScrollingEnabled = true;
|
|
setVerticalScrollBarPolicy(vsbPolicy);
|
|
setVerticalScrollBar(createVerticalScrollBar());
|
|
setHorizontalScrollBarPolicy(hsbPolicy);
|
|
setHorizontalScrollBar(createHorizontalScrollBar());
|
|
viewport = createViewport();
|
|
if (view != null)
|
|
getViewport().setView(view);
|
|
add(viewport,0);
|
|
setLayout(new ScrollPaneLayout());
|
|
setOpaque(false);
|
|
updateUI();
|
|
}
|
|
|
|
|
|
public JScrollBar createHorizontalScrollBar()
|
|
{
|
|
return new ScrollBar(SwingConstants.HORIZONTAL);
|
|
}
|
|
|
|
public JScrollBar createVerticalScrollBar()
|
|
{
|
|
return new ScrollBar(SwingConstants.VERTICAL);
|
|
}
|
|
|
|
protected JViewport createViewport()
|
|
{
|
|
return new JViewport();
|
|
}
|
|
|
|
public String getUIClassID()
|
|
{
|
|
return "ScrollPaneUI";
|
|
}
|
|
|
|
public void updateUI()
|
|
{
|
|
setUI((ScrollPaneUI) UIManager.getUI(this));
|
|
}
|
|
|
|
/**
|
|
* This method returns the scrollpane's UI delegate.
|
|
*
|
|
* @return The scrollpane's UI delegate.
|
|
*/
|
|
public ScrollPaneUI getUI()
|
|
{
|
|
return (ScrollPaneUI) ui;
|
|
}
|
|
|
|
/**
|
|
* This method sets the scrollpane's UI delegate.
|
|
*
|
|
* @param ui The scrollpane's UI delegate.
|
|
*/
|
|
public void setUI(ScrollPaneUI ui)
|
|
{
|
|
super.setUI(ui);
|
|
}
|
|
|
|
protected class ScrollBar
|
|
extends JScrollBar
|
|
implements UIResource
|
|
{
|
|
private static final long serialVersionUID = -42032395320987283L;
|
|
|
|
public ScrollBar(int orientation)
|
|
{
|
|
super(orientation);
|
|
}
|
|
|
|
public int getBlockIncrement(int direction)
|
|
{
|
|
Component view = JScrollPane.this.getViewport().getView();
|
|
if (view == null || (! (view instanceof Scrollable)))
|
|
return super.getBlockIncrement(direction);
|
|
else
|
|
{
|
|
Scrollable s = (Scrollable) view;
|
|
return s.getScrollableBlockIncrement(JScrollPane.this.getViewport().getViewRect(),
|
|
this.getOrientation(),
|
|
direction);
|
|
}
|
|
}
|
|
|
|
public int getUnitIncrement(int direction)
|
|
{
|
|
Component view = JScrollPane.this.getViewport().getView();
|
|
if (view == null || (! (view instanceof Scrollable)))
|
|
return super.getUnitIncrement(direction);
|
|
else
|
|
{
|
|
Scrollable s = (Scrollable) view;
|
|
return s.getScrollableUnitIncrement(JScrollPane.this.getViewport().getViewRect(),
|
|
this.getOrientation(),
|
|
direction);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the accessible context associated with this
|
|
* <code>JScrollPane</code>.
|
|
*
|
|
* @return the accessible context associated with this
|
|
* <code>JScrollPane</code>
|
|
*/
|
|
public AccessibleContext getAccessibleContext()
|
|
{
|
|
if (accessibleContext == null)
|
|
accessibleContext = new AccessibleJScrollPane();
|
|
return accessibleContext;
|
|
}
|
|
}
|