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/* * @(#)MetalScrollPaneUI.java 1.21 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.swing.plaf.metal; import javax.swing.*; import javax.swing.event.*; import javax.swing.border.*; import javax.swing.plaf.*; import javax.swing.plaf.basic.*; import java.awt.*; import java.beans.*; import java.awt.event.*; /** * A Metal L&F implementation of ScrollPaneUI. * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing. As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @version 1.21 11/17/05 * @author Steve Wilson */ public class MetalScrollPaneUI extends BasicScrollPaneUI { private PropertyChangeListener scrollBarSwapListener; public static ComponentUI createUI(JComponent x) { return new MetalScrollPaneUI(); } public void installUI(JComponent c) { super.installUI(c); JScrollPane sp = (JScrollPane)c; updateScrollbarsFreeStanding(); } public void uninstallUI(JComponent c) { super.uninstallUI(c); JScrollPane sp = (JScrollPane)c; JScrollBar hsb = sp.getHorizontalScrollBar(); JScrollBar vsb = sp.getVerticalScrollBar(); if (hsb != null) { hsb.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, null); } if (vsb != null) { vsb.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, null); } } public void installListeners(JScrollPane scrollPane) { super.installListeners(scrollPane); scrollBarSwapListener = createScrollBarSwapListener(); scrollPane.addPropertyChangeListener(scrollBarSwapListener); } public void uninstallListeners(JScrollPane scrollPane) { super.uninstallListeners(scrollPane); scrollPane.removePropertyChangeListener(scrollBarSwapListener); } /** * If the border of the scrollpane is an instance of * <code>MetalBorders.ScrollPaneBorder</code>, the client property * <code>FREE_STANDING_PROP</code> of the scrollbars * is set to false, otherwise it is set to true. */ private void updateScrollbarsFreeStanding() { if (scrollpane == null) { return; } Border border = scrollpane.getBorder(); Object value; if (border instanceof MetalBorders.ScrollPaneBorder) { value = Boolean.FALSE; } else { value = Boolean.TRUE; } JScrollBar sb = scrollpane.getHorizontalScrollBar(); if (sb != null) { sb.putClientProperty (MetalScrollBarUI.FREE_STANDING_PROP, value); } sb = scrollpane.getVerticalScrollBar(); if (sb != null) { sb.putClientProperty (MetalScrollBarUI.FREE_STANDING_PROP, value); } } protected PropertyChangeListener createScrollBarSwapListener() { return new PropertyChangeListener() { public void propertyChange(PropertyChangeEvent e) { String propertyName = e.getPropertyName(); if (propertyName.equals("verticalScrollBar") || propertyName.equals("horizontalScrollBar")) { JScrollBar oldSB = (JScrollBar)e.getOldValue(); if (oldSB != null) { oldSB.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, null); } JScrollBar newSB = (JScrollBar)e.getNewValue(); if (newSB != null) { newSB.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE); } } else if ("border".equals(propertyName)) { updateScrollbarsFreeStanding(); } }}; } }