author | ohair |
Tue, 28 Dec 2010 15:53:50 -0800 | |
changeset 7668 | d4a77089c587 |
parent 6652 | 482a7a13ef22 |
child 21278 | ef8a3a2a72f2 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.plaf.basic; |
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import sun.swing.DefaultLookup; |
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import sun.swing.UIAction; |
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import java.awt.*; |
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import java.awt.event.*; |
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import java.beans.*; |
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import javax.swing.*; |
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import javax.swing.event.*; |
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import javax.swing.plaf.*; |
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/** |
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* Implementation of ScrollBarUI for the Basic Look and Feel |
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* |
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* @author Rich Schiavi |
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* @author David Kloba |
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* @author Hans Muller |
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*/ |
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public class BasicScrollBarUI |
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extends ScrollBarUI implements LayoutManager, SwingConstants |
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{ |
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private static final int POSITIVE_SCROLL = 1; |
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private static final int NEGATIVE_SCROLL = -1; |
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private static final int MIN_SCROLL = 2; |
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private static final int MAX_SCROLL = 3; |
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// NOTE: DO NOT use this field directly, SynthScrollBarUI assumes you'll |
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// call getMinimumThumbSize to access it. |
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protected Dimension minimumThumbSize; |
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protected Dimension maximumThumbSize; |
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protected Color thumbHighlightColor; |
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protected Color thumbLightShadowColor; |
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protected Color thumbDarkShadowColor; |
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protected Color thumbColor; |
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protected Color trackColor; |
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protected Color trackHighlightColor; |
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protected JScrollBar scrollbar; |
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protected JButton incrButton; |
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protected JButton decrButton; |
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protected boolean isDragging; |
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protected TrackListener trackListener; |
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protected ArrowButtonListener buttonListener; |
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protected ModelListener modelListener; |
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protected Rectangle thumbRect; |
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protected Rectangle trackRect; |
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protected int trackHighlight; |
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protected static final int NO_HIGHLIGHT = 0; |
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protected static final int DECREASE_HIGHLIGHT = 1; |
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protected static final int INCREASE_HIGHLIGHT = 2; |
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protected ScrollListener scrollListener; |
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protected PropertyChangeListener propertyChangeListener; |
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protected Timer scrollTimer; |
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private final static int scrollSpeedThrottle = 60; // delay in milli seconds |
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/** True indicates a middle click will absolutely position the |
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* scrollbar. */ |
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private boolean supportsAbsolutePositioning; |
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/** |
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* Hint as to what width (when vertical) or height (when horizontal) |
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* should be. |
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* |
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* @since 1.7 |
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*/ |
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protected int scrollBarWidth; |
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private Handler handler; |
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private boolean thumbActive; |
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/** |
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* Determine whether scrollbar layout should use cached value or adjusted |
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* value returned by scrollbar's <code>getValue</code>. |
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*/ |
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private boolean useCachedValue = false; |
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/** |
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* The scrollbar value is cached to save real value if the view is adjusted. |
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*/ |
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private int scrollBarValue; |
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/** |
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* Distance between the increment button and the track. This may be a negative |
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* number. If negative, then an overlap between the button and track will occur, |
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* which is useful for shaped buttons. |
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* |
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* @since 1.7 |
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*/ |
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protected int incrGap; |
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/** |
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* Distance between the decrement button and the track. This may be a negative |
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* number. If negative, then an overlap between the button and track will occur, |
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* which is useful for shaped buttons. |
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* |
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* @since 1.7 |
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*/ |
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protected int decrGap; |
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static void loadActionMap(LazyActionMap map) { |
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map.put(new Actions(Actions.POSITIVE_UNIT_INCREMENT)); |
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map.put(new Actions(Actions.POSITIVE_BLOCK_INCREMENT)); |
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map.put(new Actions(Actions.NEGATIVE_UNIT_INCREMENT)); |
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map.put(new Actions(Actions.NEGATIVE_BLOCK_INCREMENT)); |
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map.put(new Actions(Actions.MIN_SCROLL)); |
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map.put(new Actions(Actions.MAX_SCROLL)); |
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} |
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public static ComponentUI createUI(JComponent c) { |
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return new BasicScrollBarUI(); |
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} |
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protected void configureScrollBarColors() |
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{ |
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LookAndFeel.installColors(scrollbar, "ScrollBar.background", |
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"ScrollBar.foreground"); |
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thumbHighlightColor = UIManager.getColor("ScrollBar.thumbHighlight"); |
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thumbLightShadowColor = UIManager.getColor("ScrollBar.thumbShadow"); |
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thumbDarkShadowColor = UIManager.getColor("ScrollBar.thumbDarkShadow"); |
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thumbColor = UIManager.getColor("ScrollBar.thumb"); |
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trackColor = UIManager.getColor("ScrollBar.track"); |
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trackHighlightColor = UIManager.getColor("ScrollBar.trackHighlight"); |
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} |
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public void installUI(JComponent c) { |
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scrollbar = (JScrollBar)c; |
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thumbRect = new Rectangle(0, 0, 0, 0); |
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trackRect = new Rectangle(0, 0, 0, 0); |
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installDefaults(); |
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installComponents(); |
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installListeners(); |
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installKeyboardActions(); |
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} |
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public void uninstallUI(JComponent c) { |
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scrollbar = (JScrollBar)c; |
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uninstallListeners(); |
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uninstallDefaults(); |
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uninstallComponents(); |
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uninstallKeyboardActions(); |
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thumbRect = null; |
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scrollbar = null; |
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incrButton = null; |
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decrButton = null; |
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} |
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protected void installDefaults() |
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{ |
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scrollBarWidth = UIManager.getInt("ScrollBar.width"); |
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if (scrollBarWidth <= 0) { |
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scrollBarWidth = 16; |
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} |
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minimumThumbSize = (Dimension)UIManager.get("ScrollBar.minimumThumbSize"); |
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maximumThumbSize = (Dimension)UIManager.get("ScrollBar.maximumThumbSize"); |
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Boolean absB = (Boolean)UIManager.get("ScrollBar.allowsAbsolutePositioning"); |
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supportsAbsolutePositioning = (absB != null) ? absB.booleanValue() : |
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false; |
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trackHighlight = NO_HIGHLIGHT; |
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if (scrollbar.getLayout() == null || |
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(scrollbar.getLayout() instanceof UIResource)) { |
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scrollbar.setLayout(this); |
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} |
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configureScrollBarColors(); |
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LookAndFeel.installBorder(scrollbar, "ScrollBar.border"); |
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LookAndFeel.installProperty(scrollbar, "opaque", Boolean.TRUE); |
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scrollBarValue = scrollbar.getValue(); |
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incrGap = UIManager.getInt("ScrollBar.incrementButtonGap"); |
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decrGap = UIManager.getInt("ScrollBar.decrementButtonGap"); |
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// TODO this can be removed when incrGap/decrGap become protected |
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// handle scaling for sizeVarients for special case components. The |
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// key "JComponent.sizeVariant" scales for large/small/mini |
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// components are based on Apples LAF |
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String scaleKey = (String)scrollbar.getClientProperty( |
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"JComponent.sizeVariant"); |
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if (scaleKey != null){ |
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if ("large".equals(scaleKey)){ |
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scrollBarWidth *= 1.15; |
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incrGap *= 1.15; |
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decrGap *= 1.15; |
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} else if ("small".equals(scaleKey)){ |
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scrollBarWidth *= 0.857; |
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incrGap *= 0.857; |
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decrGap *= 0.714; |
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} else if ("mini".equals(scaleKey)){ |
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scrollBarWidth *= 0.714; |
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incrGap *= 0.714; |
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decrGap *= 0.714; |
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} |
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} |
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} |
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protected void installComponents(){ |
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switch (scrollbar.getOrientation()) { |
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case JScrollBar.VERTICAL: |
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incrButton = createIncreaseButton(SOUTH); |
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decrButton = createDecreaseButton(NORTH); |
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break; |
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case JScrollBar.HORIZONTAL: |
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if (scrollbar.getComponentOrientation().isLeftToRight()) { |
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incrButton = createIncreaseButton(EAST); |
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decrButton = createDecreaseButton(WEST); |
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} else { |
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incrButton = createIncreaseButton(WEST); |
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decrButton = createDecreaseButton(EAST); |
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} |
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break; |
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} |
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scrollbar.add(incrButton); |
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scrollbar.add(decrButton); |
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// Force the children's enabled state to be updated. |
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scrollbar.setEnabled(scrollbar.isEnabled()); |
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} |
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protected void uninstallComponents(){ |
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scrollbar.remove(incrButton); |
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scrollbar.remove(decrButton); |
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} |
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protected void installListeners(){ |
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trackListener = createTrackListener(); |
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buttonListener = createArrowButtonListener(); |
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modelListener = createModelListener(); |
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propertyChangeListener = createPropertyChangeListener(); |
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scrollbar.addMouseListener(trackListener); |
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scrollbar.addMouseMotionListener(trackListener); |
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scrollbar.getModel().addChangeListener(modelListener); |
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scrollbar.addPropertyChangeListener(propertyChangeListener); |
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scrollbar.addFocusListener(getHandler()); |
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if (incrButton != null) { |
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incrButton.addMouseListener(buttonListener); |
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} |
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if (decrButton != null) { |
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decrButton.addMouseListener(buttonListener); |
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} |
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scrollListener = createScrollListener(); |
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scrollTimer = new Timer(scrollSpeedThrottle, scrollListener); |
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scrollTimer.setInitialDelay(300); // default InitialDelay? |
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} |
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protected void installKeyboardActions(){ |
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LazyActionMap.installLazyActionMap(scrollbar, BasicScrollBarUI.class, |
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"ScrollBar.actionMap"); |
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InputMap inputMap = getInputMap(JComponent.WHEN_FOCUSED); |
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SwingUtilities.replaceUIInputMap(scrollbar, JComponent.WHEN_FOCUSED, |
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inputMap); |
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inputMap = getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT); |
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SwingUtilities.replaceUIInputMap(scrollbar, |
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JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, inputMap); |
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} |
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protected void uninstallKeyboardActions(){ |
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SwingUtilities.replaceUIInputMap(scrollbar, JComponent.WHEN_FOCUSED, |
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null); |
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SwingUtilities.replaceUIActionMap(scrollbar, null); |
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} |
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private InputMap getInputMap(int condition) { |
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if (condition == JComponent.WHEN_FOCUSED) { |
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InputMap keyMap = (InputMap)DefaultLookup.get( |
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scrollbar, this, "ScrollBar.focusInputMap"); |
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InputMap rtlKeyMap; |
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if (scrollbar.getComponentOrientation().isLeftToRight() || |
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((rtlKeyMap = (InputMap)DefaultLookup.get(scrollbar, this, "ScrollBar.focusInputMap.RightToLeft")) == null)) { |
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return keyMap; |
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} else { |
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rtlKeyMap.setParent(keyMap); |
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return rtlKeyMap; |
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} |
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} |
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else if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) { |
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InputMap keyMap = (InputMap)DefaultLookup.get( |
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scrollbar, this, "ScrollBar.ancestorInputMap"); |
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InputMap rtlKeyMap; |
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if (scrollbar.getComponentOrientation().isLeftToRight() || |
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((rtlKeyMap = (InputMap)DefaultLookup.get(scrollbar, this, "ScrollBar.ancestorInputMap.RightToLeft")) == null)) { |
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return keyMap; |
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} else { |
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rtlKeyMap.setParent(keyMap); |
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return rtlKeyMap; |
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} |
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} |
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return null; |
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} |
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protected void uninstallListeners() { |
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scrollTimer.stop(); |
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scrollTimer = null; |
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if (decrButton != null){ |
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decrButton.removeMouseListener(buttonListener); |
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} |
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if (incrButton != null){ |
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incrButton.removeMouseListener(buttonListener); |
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} |
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scrollbar.getModel().removeChangeListener(modelListener); |
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scrollbar.removeMouseListener(trackListener); |
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scrollbar.removeMouseMotionListener(trackListener); |
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scrollbar.removePropertyChangeListener(propertyChangeListener); |
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scrollbar.removeFocusListener(getHandler()); |
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handler = null; |
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} |
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protected void uninstallDefaults(){ |
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LookAndFeel.uninstallBorder(scrollbar); |
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if (scrollbar.getLayout() == this) { |
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scrollbar.setLayout(null); |
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} |
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} |
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private Handler getHandler() { |
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if (handler == null) { |
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handler = new Handler(); |
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} |
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return handler; |
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} |
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protected TrackListener createTrackListener(){ |
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return new TrackListener(); |
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} |
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protected ArrowButtonListener createArrowButtonListener(){ |
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return new ArrowButtonListener(); |
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} |
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protected ModelListener createModelListener(){ |
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return new ModelListener(); |
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} |
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protected ScrollListener createScrollListener(){ |
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return new ScrollListener(); |
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} |
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protected PropertyChangeListener createPropertyChangeListener() { |
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return getHandler(); |
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} |
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private void updateThumbState(int x, int y) { |
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397 |
Rectangle rect = getThumbBounds(); |
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setThumbRollover(rect.contains(x, y)); |
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} |
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/** |
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* Sets whether or not the mouse is currently over the thumb. |
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* |
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* @param active True indicates the thumb is currently active. |
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* @since 1.5 |
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*/ |
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protected void setThumbRollover(boolean active) { |
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if (thumbActive != active) { |
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thumbActive = active; |
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scrollbar.repaint(getThumbBounds()); |
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} |
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} |
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415 |
/** |
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* Returns true if the mouse is currently over the thumb. |
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* |
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* @return true if the thumb is currently active |
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* @since 1.5 |
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420 |
*/ |
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421 |
public boolean isThumbRollover() { |
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422 |
return thumbActive; |
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423 |
} |
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424 |
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425 |
public void paint(Graphics g, JComponent c) { |
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426 |
paintTrack(g, c, getTrackBounds()); |
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427 |
Rectangle thumbBounds = getThumbBounds(); |
|
428 |
if (thumbBounds.intersects(g.getClipBounds())) { |
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429 |
paintThumb(g, c, thumbBounds); |
|
430 |
} |
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431 |
} |
|
432 |
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433 |
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434 |
/** |
|
435 |
* A vertical scrollbar's preferred width is the maximum of |
|
436 |
* preferred widths of the (non <code>null</code>) |
|
437 |
* increment/decrement buttons, |
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438 |
* and the minimum width of the thumb. The preferred height is the |
|
439 |
* sum of the preferred heights of the same parts. The basis for |
|
440 |
* the preferred size of a horizontal scrollbar is similar. |
|
441 |
* <p> |
|
442 |
* The <code>preferredSize</code> is only computed once, subsequent |
|
443 |
* calls to this method just return a cached size. |
|
444 |
* |
|
445 |
* @param c the <code>JScrollBar</code> that's delegating this method to us |
|
446 |
* @return the preferred size of a Basic JScrollBar |
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447 |
* @see #getMaximumSize |
|
448 |
* @see #getMinimumSize |
|
449 |
*/ |
|
450 |
public Dimension getPreferredSize(JComponent c) { |
|
451 |
return (scrollbar.getOrientation() == JScrollBar.VERTICAL) |
|
452 |
? new Dimension(scrollBarWidth, 48) |
|
453 |
: new Dimension(48, scrollBarWidth); |
|
454 |
} |
|
455 |
||
456 |
||
457 |
/** |
|
458 |
* @param c The JScrollBar that's delegating this method to us. |
|
459 |
* @return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); |
|
460 |
* @see #getMinimumSize |
|
461 |
* @see #getPreferredSize |
|
462 |
*/ |
|
463 |
public Dimension getMaximumSize(JComponent c) { |
|
464 |
return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); |
|
465 |
} |
|
466 |
||
467 |
protected JButton createDecreaseButton(int orientation) { |
|
468 |
return new BasicArrowButton(orientation, |
|
469 |
UIManager.getColor("ScrollBar.thumb"), |
|
470 |
UIManager.getColor("ScrollBar.thumbShadow"), |
|
471 |
UIManager.getColor("ScrollBar.thumbDarkShadow"), |
|
472 |
UIManager.getColor("ScrollBar.thumbHighlight")); |
|
473 |
} |
|
474 |
||
475 |
protected JButton createIncreaseButton(int orientation) { |
|
476 |
return new BasicArrowButton(orientation, |
|
477 |
UIManager.getColor("ScrollBar.thumb"), |
|
478 |
UIManager.getColor("ScrollBar.thumbShadow"), |
|
479 |
UIManager.getColor("ScrollBar.thumbDarkShadow"), |
|
480 |
UIManager.getColor("ScrollBar.thumbHighlight")); |
|
481 |
} |
|
482 |
||
483 |
||
484 |
protected void paintDecreaseHighlight(Graphics g) |
|
485 |
{ |
|
486 |
Insets insets = scrollbar.getInsets(); |
|
487 |
Rectangle thumbR = getThumbBounds(); |
|
488 |
g.setColor(trackHighlightColor); |
|
489 |
||
490 |
if (scrollbar.getOrientation() == JScrollBar.VERTICAL) { |
|
2658 | 491 |
//paint the distance between the start of the track and top of the thumb |
2 | 492 |
int x = insets.left; |
2658 | 493 |
int y = trackRect.y; |
2 | 494 |
int w = scrollbar.getWidth() - (insets.left + insets.right); |
495 |
int h = thumbR.y - y; |
|
496 |
g.fillRect(x, y, w, h); |
|
2658 | 497 |
} else { |
498 |
//if left-to-right, fill the area between the start of the track and |
|
499 |
//the left edge of the thumb. If right-to-left, fill the area between |
|
500 |
//the end of the thumb and end of the track. |
|
2 | 501 |
int x, w; |
502 |
if (scrollbar.getComponentOrientation().isLeftToRight()) { |
|
2658 | 503 |
x = trackRect.x; |
2 | 504 |
w = thumbR.x - x; |
505 |
} else { |
|
506 |
x = thumbR.x + thumbR.width; |
|
2658 | 507 |
w = trackRect.x + trackRect.width - x; |
2 | 508 |
} |
509 |
int y = insets.top; |
|
510 |
int h = scrollbar.getHeight() - (insets.top + insets.bottom); |
|
511 |
g.fillRect(x, y, w, h); |
|
512 |
} |
|
513 |
} |
|
514 |
||
515 |
||
516 |
protected void paintIncreaseHighlight(Graphics g) |
|
517 |
{ |
|
518 |
Insets insets = scrollbar.getInsets(); |
|
519 |
Rectangle thumbR = getThumbBounds(); |
|
520 |
g.setColor(trackHighlightColor); |
|
521 |
||
522 |
if (scrollbar.getOrientation() == JScrollBar.VERTICAL) { |
|
2658 | 523 |
//fill the area between the bottom of the thumb and the end of the track. |
2 | 524 |
int x = insets.left; |
525 |
int y = thumbR.y + thumbR.height; |
|
526 |
int w = scrollbar.getWidth() - (insets.left + insets.right); |
|
2658 | 527 |
int h = trackRect.y + trackRect.height - y; |
2 | 528 |
g.fillRect(x, y, w, h); |
529 |
} |
|
530 |
else { |
|
2658 | 531 |
//if left-to-right, fill the area between the right of the thumb and the |
532 |
//end of the track. If right-to-left, then fill the area to the left of |
|
533 |
//the thumb and the start of the track. |
|
2 | 534 |
int x, w; |
535 |
if (scrollbar.getComponentOrientation().isLeftToRight()) { |
|
536 |
x = thumbR.x + thumbR.width; |
|
2658 | 537 |
w = trackRect.x + trackRect.width - x; |
2 | 538 |
} else { |
2658 | 539 |
x = trackRect.x; |
2 | 540 |
w = thumbR.x - x; |
541 |
} |
|
542 |
int y = insets.top; |
|
543 |
int h = scrollbar.getHeight() - (insets.top + insets.bottom); |
|
544 |
g.fillRect(x, y, w, h); |
|
545 |
} |
|
546 |
} |
|
547 |
||
548 |
||
549 |
protected void paintTrack(Graphics g, JComponent c, Rectangle trackBounds) |
|
550 |
{ |
|
551 |
g.setColor(trackColor); |
|
552 |
g.fillRect(trackBounds.x, trackBounds.y, trackBounds.width, trackBounds.height); |
|
553 |
||
554 |
if(trackHighlight == DECREASE_HIGHLIGHT) { |
|
555 |
paintDecreaseHighlight(g); |
|
556 |
} |
|
557 |
else if(trackHighlight == INCREASE_HIGHLIGHT) { |
|
558 |
paintIncreaseHighlight(g); |
|
559 |
} |
|
560 |
} |
|
561 |
||
562 |
||
563 |
protected void paintThumb(Graphics g, JComponent c, Rectangle thumbBounds) |
|
564 |
{ |
|
565 |
if(thumbBounds.isEmpty() || !scrollbar.isEnabled()) { |
|
566 |
return; |
|
567 |
} |
|
568 |
||
569 |
int w = thumbBounds.width; |
|
570 |
int h = thumbBounds.height; |
|
571 |
||
572 |
g.translate(thumbBounds.x, thumbBounds.y); |
|
573 |
||
574 |
g.setColor(thumbDarkShadowColor); |
|
575 |
g.drawRect(0, 0, w-1, h-1); |
|
576 |
g.setColor(thumbColor); |
|
577 |
g.fillRect(0, 0, w-1, h-1); |
|
578 |
||
579 |
g.setColor(thumbHighlightColor); |
|
580 |
g.drawLine(1, 1, 1, h-2); |
|
581 |
g.drawLine(2, 1, w-3, 1); |
|
582 |
||
583 |
g.setColor(thumbLightShadowColor); |
|
584 |
g.drawLine(2, h-2, w-2, h-2); |
|
585 |
g.drawLine(w-2, 1, w-2, h-3); |
|
586 |
||
587 |
g.translate(-thumbBounds.x, -thumbBounds.y); |
|
588 |
} |
|
589 |
||
590 |
||
591 |
/** |
|
4394 | 592 |
* Returns the smallest acceptable size for the thumb. If the scrollbar |
2 | 593 |
* becomes so small that this size isn't available, the thumb will be |
594 |
* hidden. |
|
595 |
* <p> |
|
596 |
* <b>Warning </b>: the value returned by this method should not be |
|
597 |
* be modified, it's a shared static constant. |
|
598 |
* |
|
599 |
* @return The smallest acceptable size for the thumb. |
|
600 |
* @see #getMaximumThumbSize |
|
601 |
*/ |
|
602 |
protected Dimension getMinimumThumbSize() { |
|
603 |
return minimumThumbSize; |
|
604 |
} |
|
605 |
||
606 |
/** |
|
4394 | 607 |
* Returns the largest acceptable size for the thumb. To create a fixed |
2 | 608 |
* size thumb one make this method and <code>getMinimumThumbSize</code> |
609 |
* return the same value. |
|
610 |
* <p> |
|
611 |
* <b>Warning </b>: the value returned by this method should not be |
|
612 |
* be modified, it's a shared static constant. |
|
613 |
* |
|
614 |
* @return The largest acceptable size for the thumb. |
|
615 |
* @see #getMinimumThumbSize |
|
616 |
*/ |
|
617 |
protected Dimension getMaximumThumbSize() { |
|
618 |
return maximumThumbSize; |
|
619 |
} |
|
620 |
||
621 |
||
622 |
/* |
|
623 |
* LayoutManager Implementation |
|
624 |
*/ |
|
625 |
||
626 |
public void addLayoutComponent(String name, Component child) {} |
|
627 |
public void removeLayoutComponent(Component child) {} |
|
628 |
||
629 |
public Dimension preferredLayoutSize(Container scrollbarContainer) { |
|
630 |
return getPreferredSize((JComponent)scrollbarContainer); |
|
631 |
} |
|
632 |
||
633 |
public Dimension minimumLayoutSize(Container scrollbarContainer) { |
|
634 |
return getMinimumSize((JComponent)scrollbarContainer); |
|
635 |
} |
|
636 |
||
637 |
private int getValue(JScrollBar sb) { |
|
638 |
return (useCachedValue) ? scrollBarValue : sb.getValue(); |
|
639 |
} |
|
640 |
||
641 |
protected void layoutVScrollbar(JScrollBar sb) |
|
642 |
{ |
|
643 |
Dimension sbSize = sb.getSize(); |
|
644 |
Insets sbInsets = sb.getInsets(); |
|
645 |
||
646 |
/* |
|
647 |
* Width and left edge of the buttons and thumb. |
|
648 |
*/ |
|
649 |
int itemW = sbSize.width - (sbInsets.left + sbInsets.right); |
|
650 |
int itemX = sbInsets.left; |
|
651 |
||
652 |
/* Nominal locations of the buttons, assuming their preferred |
|
653 |
* size will fit. |
|
654 |
*/ |
|
655 |
boolean squareButtons = DefaultLookup.getBoolean( |
|
656 |
scrollbar, this, "ScrollBar.squareButtons", false); |
|
657 |
int decrButtonH = squareButtons ? itemW : |
|
658 |
decrButton.getPreferredSize().height; |
|
659 |
int decrButtonY = sbInsets.top; |
|
660 |
||
661 |
int incrButtonH = squareButtons ? itemW : |
|
662 |
incrButton.getPreferredSize().height; |
|
663 |
int incrButtonY = sbSize.height - (sbInsets.bottom + incrButtonH); |
|
664 |
||
665 |
/* The thumb must fit within the height left over after we |
|
2658 | 666 |
* subtract the preferredSize of the buttons and the insets |
667 |
* and the gaps |
|
2 | 668 |
*/ |
669 |
int sbInsetsH = sbInsets.top + sbInsets.bottom; |
|
670 |
int sbButtonsH = decrButtonH + incrButtonH; |
|
2658 | 671 |
int gaps = decrGap + incrGap; |
672 |
float trackH = sbSize.height - (sbInsetsH + sbButtonsH) - gaps; |
|
2 | 673 |
|
674 |
/* Compute the height and origin of the thumb. The case |
|
675 |
* where the thumb is at the bottom edge is handled specially |
|
676 |
* to avoid numerical problems in computing thumbY. Enforce |
|
677 |
* the thumbs min/max dimensions. If the thumb doesn't |
|
678 |
* fit in the track (trackH) we'll hide it later. |
|
679 |
*/ |
|
680 |
float min = sb.getMinimum(); |
|
681 |
float extent = sb.getVisibleAmount(); |
|
682 |
float range = sb.getMaximum() - min; |
|
683 |
float value = getValue(sb); |
|
684 |
||
685 |
int thumbH = (range <= 0) |
|
686 |
? getMaximumThumbSize().height : (int)(trackH * (extent / range)); |
|
687 |
thumbH = Math.max(thumbH, getMinimumThumbSize().height); |
|
688 |
thumbH = Math.min(thumbH, getMaximumThumbSize().height); |
|
689 |
||
2658 | 690 |
int thumbY = incrButtonY - incrGap - thumbH; |
2 | 691 |
if (value < (sb.getMaximum() - sb.getVisibleAmount())) { |
692 |
float thumbRange = trackH - thumbH; |
|
693 |
thumbY = (int)(0.5f + (thumbRange * ((value - min) / (range - extent)))); |
|
2658 | 694 |
thumbY += decrButtonY + decrButtonH + decrGap; |
2 | 695 |
} |
696 |
||
697 |
/* If the buttons don't fit, allocate half of the available |
|
698 |
* space to each and move the lower one (incrButton) down. |
|
699 |
*/ |
|
700 |
int sbAvailButtonH = (sbSize.height - sbInsetsH); |
|
701 |
if (sbAvailButtonH < sbButtonsH) { |
|
702 |
incrButtonH = decrButtonH = sbAvailButtonH / 2; |
|
703 |
incrButtonY = sbSize.height - (sbInsets.bottom + incrButtonH); |
|
704 |
} |
|
705 |
decrButton.setBounds(itemX, decrButtonY, itemW, decrButtonH); |
|
706 |
incrButton.setBounds(itemX, incrButtonY, itemW, incrButtonH); |
|
707 |
||
708 |
/* Update the trackRect field. |
|
709 |
*/ |
|
2658 | 710 |
int itrackY = decrButtonY + decrButtonH + decrGap; |
711 |
int itrackH = incrButtonY - incrGap - itrackY; |
|
2 | 712 |
trackRect.setBounds(itemX, itrackY, itemW, itrackH); |
713 |
||
714 |
/* If the thumb isn't going to fit, zero it's bounds. Otherwise |
|
715 |
* make sure it fits between the buttons. Note that setting the |
|
716 |
* thumbs bounds will cause a repaint. |
|
717 |
*/ |
|
718 |
if(thumbH >= (int)trackH) { |
|
719 |
if (UIManager.getBoolean("ScrollBar.alwaysShowThumb")) { |
|
720 |
// This is used primarily for GTK L&F, which expands the |
|
721 |
// thumb to fit the track when it would otherwise be hidden. |
|
722 |
setThumbBounds(itemX, itrackY, itemW, itrackH); |
|
723 |
} else { |
|
724 |
// Other L&F's simply hide the thumb in this case. |
|
725 |
setThumbBounds(0, 0, 0, 0); |
|
726 |
} |
|
727 |
} |
|
728 |
else { |
|
2658 | 729 |
if ((thumbY + thumbH) > incrButtonY - incrGap) { |
730 |
thumbY = incrButtonY - incrGap - thumbH; |
|
2 | 731 |
} |
2658 | 732 |
if (thumbY < (decrButtonY + decrButtonH + decrGap)) { |
733 |
thumbY = decrButtonY + decrButtonH + decrGap + 1; |
|
2 | 734 |
} |
735 |
setThumbBounds(itemX, thumbY, itemW, thumbH); |
|
736 |
} |
|
737 |
} |
|
738 |
||
739 |
||
740 |
protected void layoutHScrollbar(JScrollBar sb) |
|
741 |
{ |
|
742 |
Dimension sbSize = sb.getSize(); |
|
743 |
Insets sbInsets = sb.getInsets(); |
|
744 |
||
745 |
/* Height and top edge of the buttons and thumb. |
|
746 |
*/ |
|
747 |
int itemH = sbSize.height - (sbInsets.top + sbInsets.bottom); |
|
748 |
int itemY = sbInsets.top; |
|
749 |
||
750 |
boolean ltr = sb.getComponentOrientation().isLeftToRight(); |
|
751 |
||
752 |
/* Nominal locations of the buttons, assuming their preferred |
|
753 |
* size will fit. |
|
754 |
*/ |
|
755 |
boolean squareButtons = DefaultLookup.getBoolean( |
|
756 |
scrollbar, this, "ScrollBar.squareButtons", false); |
|
757 |
int leftButtonW = squareButtons ? itemH : |
|
758 |
decrButton.getPreferredSize().width; |
|
759 |
int rightButtonW = squareButtons ? itemH : |
|
760 |
incrButton.getPreferredSize().width; |
|
761 |
if (!ltr) { |
|
762 |
int temp = leftButtonW; |
|
763 |
leftButtonW = rightButtonW; |
|
764 |
rightButtonW = temp; |
|
765 |
} |
|
766 |
int leftButtonX = sbInsets.left; |
|
767 |
int rightButtonX = sbSize.width - (sbInsets.right + rightButtonW); |
|
2658 | 768 |
int leftGap = ltr ? decrGap : incrGap; |
769 |
int rightGap = ltr ? incrGap : decrGap; |
|
2 | 770 |
|
771 |
/* The thumb must fit within the width left over after we |
|
2658 | 772 |
* subtract the preferredSize of the buttons and the insets |
773 |
* and the gaps |
|
2 | 774 |
*/ |
775 |
int sbInsetsW = sbInsets.left + sbInsets.right; |
|
776 |
int sbButtonsW = leftButtonW + rightButtonW; |
|
2658 | 777 |
float trackW = sbSize.width - (sbInsetsW + sbButtonsW) - (leftGap + rightGap); |
2 | 778 |
|
779 |
/* Compute the width and origin of the thumb. Enforce |
|
780 |
* the thumbs min/max dimensions. The case where the thumb |
|
781 |
* is at the right edge is handled specially to avoid numerical |
|
782 |
* problems in computing thumbX. If the thumb doesn't |
|
783 |
* fit in the track (trackH) we'll hide it later. |
|
784 |
*/ |
|
785 |
float min = sb.getMinimum(); |
|
786 |
float max = sb.getMaximum(); |
|
787 |
float extent = sb.getVisibleAmount(); |
|
788 |
float range = max - min; |
|
789 |
float value = getValue(sb); |
|
790 |
||
791 |
int thumbW = (range <= 0) |
|
792 |
? getMaximumThumbSize().width : (int)(trackW * (extent / range)); |
|
793 |
thumbW = Math.max(thumbW, getMinimumThumbSize().width); |
|
794 |
thumbW = Math.min(thumbW, getMaximumThumbSize().width); |
|
795 |
||
2658 | 796 |
int thumbX = ltr ? rightButtonX - rightGap - thumbW : leftButtonX + leftButtonW + leftGap; |
2 | 797 |
if (value < (max - sb.getVisibleAmount())) { |
798 |
float thumbRange = trackW - thumbW; |
|
799 |
if( ltr ) { |
|
800 |
thumbX = (int)(0.5f + (thumbRange * ((value - min) / (range - extent)))); |
|
801 |
} else { |
|
802 |
thumbX = (int)(0.5f + (thumbRange * ((max - extent - value) / (range - extent)))); |
|
803 |
} |
|
2658 | 804 |
thumbX += leftButtonX + leftButtonW + leftGap; |
2 | 805 |
} |
806 |
||
807 |
/* If the buttons don't fit, allocate half of the available |
|
808 |
* space to each and move the right one over. |
|
809 |
*/ |
|
810 |
int sbAvailButtonW = (sbSize.width - sbInsetsW); |
|
811 |
if (sbAvailButtonW < sbButtonsW) { |
|
812 |
rightButtonW = leftButtonW = sbAvailButtonW / 2; |
|
2658 | 813 |
rightButtonX = sbSize.width - (sbInsets.right + rightButtonW + rightGap); |
2 | 814 |
} |
815 |
||
816 |
(ltr ? decrButton : incrButton).setBounds(leftButtonX, itemY, leftButtonW, itemH); |
|
817 |
(ltr ? incrButton : decrButton).setBounds(rightButtonX, itemY, rightButtonW, itemH); |
|
818 |
||
819 |
/* Update the trackRect field. |
|
820 |
*/ |
|
2658 | 821 |
int itrackX = leftButtonX + leftButtonW + leftGap; |
822 |
int itrackW = rightButtonX - rightGap - itrackX; |
|
2 | 823 |
trackRect.setBounds(itrackX, itemY, itrackW, itemH); |
824 |
||
825 |
/* Make sure the thumb fits between the buttons. Note |
|
826 |
* that setting the thumbs bounds causes a repaint. |
|
827 |
*/ |
|
828 |
if (thumbW >= (int)trackW) { |
|
829 |
if (UIManager.getBoolean("ScrollBar.alwaysShowThumb")) { |
|
830 |
// This is used primarily for GTK L&F, which expands the |
|
831 |
// thumb to fit the track when it would otherwise be hidden. |
|
832 |
setThumbBounds(itrackX, itemY, itrackW, itemH); |
|
833 |
} else { |
|
834 |
// Other L&F's simply hide the thumb in this case. |
|
835 |
setThumbBounds(0, 0, 0, 0); |
|
836 |
} |
|
837 |
} |
|
838 |
else { |
|
2658 | 839 |
if (thumbX + thumbW > rightButtonX - rightGap) { |
840 |
thumbX = rightButtonX - rightGap - thumbW; |
|
2 | 841 |
} |
2658 | 842 |
if (thumbX < leftButtonX + leftButtonW + leftGap) { |
843 |
thumbX = leftButtonX + leftButtonW + leftGap + 1; |
|
2 | 844 |
} |
845 |
setThumbBounds(thumbX, itemY, thumbW, itemH); |
|
846 |
} |
|
847 |
} |
|
848 |
||
849 |
public void layoutContainer(Container scrollbarContainer) |
|
850 |
{ |
|
851 |
/* If the user is dragging the value, we'll assume that the |
|
852 |
* scrollbars layout is OK modulo the thumb which is being |
|
853 |
* handled by the dragging code. |
|
854 |
*/ |
|
855 |
if (isDragging) { |
|
856 |
return; |
|
857 |
} |
|
858 |
||
859 |
JScrollBar scrollbar = (JScrollBar)scrollbarContainer; |
|
860 |
switch (scrollbar.getOrientation()) { |
|
861 |
case JScrollBar.VERTICAL: |
|
862 |
layoutVScrollbar(scrollbar); |
|
863 |
break; |
|
864 |
||
865 |
case JScrollBar.HORIZONTAL: |
|
866 |
layoutHScrollbar(scrollbar); |
|
867 |
break; |
|
868 |
} |
|
869 |
} |
|
870 |
||
871 |
||
872 |
/** |
|
873 |
* Set the bounds of the thumb and force a repaint that includes |
|
874 |
* the old thumbBounds and the new one. |
|
875 |
* |
|
876 |
* @see #getThumbBounds |
|
877 |
*/ |
|
878 |
protected void setThumbBounds(int x, int y, int width, int height) |
|
879 |
{ |
|
880 |
/* If the thumbs bounds haven't changed, we're done. |
|
881 |
*/ |
|
882 |
if ((thumbRect.x == x) && |
|
883 |
(thumbRect.y == y) && |
|
884 |
(thumbRect.width == width) && |
|
885 |
(thumbRect.height == height)) { |
|
886 |
return; |
|
887 |
} |
|
888 |
||
889 |
/* Update thumbRect, and repaint the union of x,y,w,h and |
|
890 |
* the old thumbRect. |
|
891 |
*/ |
|
892 |
int minX = Math.min(x, thumbRect.x); |
|
893 |
int minY = Math.min(y, thumbRect.y); |
|
894 |
int maxX = Math.max(x + width, thumbRect.x + thumbRect.width); |
|
895 |
int maxY = Math.max(y + height, thumbRect.y + thumbRect.height); |
|
896 |
||
897 |
thumbRect.setBounds(x, y, width, height); |
|
898 |
scrollbar.repaint(minX, minY, maxX - minX, maxY - minY); |
|
899 |
||
900 |
// Once there is API to determine the mouse location this will need |
|
901 |
// to be changed. |
|
902 |
setThumbRollover(false); |
|
903 |
} |
|
904 |
||
905 |
||
906 |
/** |
|
907 |
* Return the current size/location of the thumb. |
|
908 |
* <p> |
|
909 |
* <b>Warning </b>: the value returned by this method should not be |
|
910 |
* be modified, it's a reference to the actual rectangle, not a copy. |
|
911 |
* |
|
912 |
* @return The current size/location of the thumb. |
|
913 |
* @see #setThumbBounds |
|
914 |
*/ |
|
915 |
protected Rectangle getThumbBounds() { |
|
916 |
return thumbRect; |
|
917 |
} |
|
918 |
||
919 |
||
920 |
/** |
|
921 |
* Returns the current bounds of the track, i.e. the space in between |
|
922 |
* the increment and decrement buttons, less the insets. The value |
|
923 |
* returned by this method is updated each time the scrollbar is |
|
924 |
* laid out (validated). |
|
925 |
* <p> |
|
926 |
* <b>Warning </b>: the value returned by this method should not be |
|
927 |
* be modified, it's a reference to the actual rectangle, not a copy. |
|
928 |
* |
|
929 |
* @return the current bounds of the scrollbar track |
|
930 |
* @see #layoutContainer |
|
931 |
*/ |
|
932 |
protected Rectangle getTrackBounds() { |
|
933 |
return trackRect; |
|
934 |
} |
|
935 |
||
936 |
/* |
|
937 |
* Method for scrolling by a block increment. |
|
938 |
* Added for mouse wheel scrolling support, RFE 4202656. |
|
939 |
*/ |
|
940 |
static void scrollByBlock(JScrollBar scrollbar, int direction) { |
|
941 |
// This method is called from BasicScrollPaneUI to implement wheel |
|
942 |
// scrolling, and also from scrollByBlock(). |
|
943 |
int oldValue = scrollbar.getValue(); |
|
944 |
int blockIncrement = scrollbar.getBlockIncrement(direction); |
|
945 |
int delta = blockIncrement * ((direction > 0) ? +1 : -1); |
|
946 |
int newValue = oldValue + delta; |
|
947 |
||
948 |
// Check for overflow. |
|
949 |
if (delta > 0 && newValue < oldValue) { |
|
950 |
newValue = scrollbar.getMaximum(); |
|
951 |
} |
|
952 |
else if (delta < 0 && newValue > oldValue) { |
|
953 |
newValue = scrollbar.getMinimum(); |
|
954 |
} |
|
955 |
||
956 |
scrollbar.setValue(newValue); |
|
957 |
} |
|
958 |
||
959 |
protected void scrollByBlock(int direction) |
|
960 |
{ |
|
961 |
scrollByBlock(scrollbar, direction); |
|
962 |
trackHighlight = direction > 0 ? INCREASE_HIGHLIGHT : DECREASE_HIGHLIGHT; |
|
963 |
Rectangle dirtyRect = getTrackBounds(); |
|
964 |
scrollbar.repaint(dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height); |
|
965 |
} |
|
966 |
||
967 |
/* |
|
968 |
* Method for scrolling by a unit increment. |
|
969 |
* Added for mouse wheel scrolling support, RFE 4202656. |
|
970 |
* |
|
971 |
* If limitByBlock is set to true, the scrollbar will scroll at least 1 |
|
972 |
* unit increment, but will not scroll farther than the block increment. |
|
973 |
* See BasicScrollPaneUI.Handler.mouseWheelMoved(). |
|
974 |
*/ |
|
975 |
static void scrollByUnits(JScrollBar scrollbar, int direction, |
|
976 |
int units, boolean limitToBlock) { |
|
977 |
// This method is called from BasicScrollPaneUI to implement wheel |
|
978 |
// scrolling, as well as from scrollByUnit(). |
|
979 |
int delta; |
|
980 |
int limit = -1; |
|
981 |
||
982 |
if (limitToBlock) { |
|
983 |
if (direction < 0) { |
|
984 |
limit = scrollbar.getValue() - |
|
985 |
scrollbar.getBlockIncrement(direction); |
|
986 |
} |
|
987 |
else { |
|
988 |
limit = scrollbar.getValue() + |
|
989 |
scrollbar.getBlockIncrement(direction); |
|
990 |
} |
|
991 |
} |
|
992 |
||
993 |
for (int i=0; i<units; i++) { |
|
994 |
if (direction > 0) { |
|
995 |
delta = scrollbar.getUnitIncrement(direction); |
|
996 |
} |
|
997 |
else { |
|
998 |
delta = -scrollbar.getUnitIncrement(direction); |
|
999 |
} |
|
1000 |
||
1001 |
int oldValue = scrollbar.getValue(); |
|
1002 |
int newValue = oldValue + delta; |
|
1003 |
||
1004 |
// Check for overflow. |
|
1005 |
if (delta > 0 && newValue < oldValue) { |
|
1006 |
newValue = scrollbar.getMaximum(); |
|
1007 |
} |
|
1008 |
else if (delta < 0 && newValue > oldValue) { |
|
1009 |
newValue = scrollbar.getMinimum(); |
|
1010 |
} |
|
1011 |
if (oldValue == newValue) { |
|
1012 |
break; |
|
1013 |
} |
|
1014 |
||
1015 |
if (limitToBlock && i > 0) { |
|
1016 |
assert limit != -1; |
|
1017 |
if ((direction < 0 && newValue < limit) || |
|
1018 |
(direction > 0 && newValue > limit)) { |
|
1019 |
break; |
|
1020 |
} |
|
1021 |
} |
|
1022 |
scrollbar.setValue(newValue); |
|
1023 |
} |
|
1024 |
} |
|
1025 |
||
1026 |
protected void scrollByUnit(int direction) { |
|
1027 |
scrollByUnits(scrollbar, direction, 1, false); |
|
1028 |
} |
|
1029 |
||
1030 |
/** |
|
1031 |
* Indicates whether the user can absolutely position the thumb with |
|
1032 |
* a mouse gesture (usually the middle mouse button). |
|
1033 |
* |
|
1034 |
* @return true if a mouse gesture can absolutely position the thumb |
|
1035 |
* @since 1.5 |
|
1036 |
*/ |
|
1037 |
public boolean getSupportsAbsolutePositioning() { |
|
1038 |
return supportsAbsolutePositioning; |
|
1039 |
} |
|
1040 |
||
1041 |
/** |
|
1042 |
* A listener to listen for model changes. |
|
1043 |
* |
|
1044 |
*/ |
|
1045 |
protected class ModelListener implements ChangeListener { |
|
1046 |
public void stateChanged(ChangeEvent e) { |
|
1047 |
if (!useCachedValue) { |
|
1048 |
scrollBarValue = scrollbar.getValue(); |
|
1049 |
} |
|
1050 |
layoutContainer(scrollbar); |
|
1051 |
useCachedValue = false; |
|
1052 |
} |
|
1053 |
} |
|
1054 |
||
1055 |
||
1056 |
/** |
|
1057 |
* Track mouse drags. |
|
1058 |
*/ |
|
1059 |
protected class TrackListener |
|
1060 |
extends MouseAdapter implements MouseMotionListener |
|
1061 |
{ |
|
1062 |
protected transient int offset; |
|
1063 |
protected transient int currentMouseX, currentMouseY; |
|
1064 |
private transient int direction = +1; |
|
1065 |
||
1066 |
public void mouseReleased(MouseEvent e) |
|
1067 |
{ |
|
1068 |
if (isDragging) { |
|
1069 |
updateThumbState(e.getX(), e.getY()); |
|
1070 |
} |
|
1071 |
if (SwingUtilities.isRightMouseButton(e) || |
|
1072 |
(!getSupportsAbsolutePositioning() && |
|
1073 |
SwingUtilities.isMiddleMouseButton(e))) |
|
1074 |
return; |
|
1075 |
if(!scrollbar.isEnabled()) |
|
1076 |
return; |
|
1077 |
||
1078 |
Rectangle r = getTrackBounds(); |
|
1079 |
scrollbar.repaint(r.x, r.y, r.width, r.height); |
|
1080 |
||
1081 |
trackHighlight = NO_HIGHLIGHT; |
|
1082 |
isDragging = false; |
|
1083 |
offset = 0; |
|
1084 |
scrollTimer.stop(); |
|
1085 |
useCachedValue = true; |
|
1086 |
scrollbar.setValueIsAdjusting(false); |
|
1087 |
} |
|
1088 |
||
1089 |
||
1090 |
/** |
|
1091 |
* If the mouse is pressed above the "thumb" component |
|
1092 |
* then reduce the scrollbars value by one page ("page up"), |
|
1093 |
* otherwise increase it by one page. If there is no |
|
1094 |
* thumb then page up if the mouse is in the upper half |
|
1095 |
* of the track. |
|
1096 |
*/ |
|
1097 |
public void mousePressed(MouseEvent e) |
|
1098 |
{ |
|
1099 |
if (SwingUtilities.isRightMouseButton(e) || |
|
1100 |
(!getSupportsAbsolutePositioning() && |
|
1101 |
SwingUtilities.isMiddleMouseButton(e))) |
|
1102 |
return; |
|
1103 |
if(!scrollbar.isEnabled()) |
|
1104 |
return; |
|
1105 |
||
1106 |
if (!scrollbar.hasFocus() && scrollbar.isRequestFocusEnabled()) { |
|
1107 |
scrollbar.requestFocus(); |
|
1108 |
} |
|
1109 |
||
1110 |
useCachedValue = true; |
|
1111 |
scrollbar.setValueIsAdjusting(true); |
|
1112 |
||
1113 |
currentMouseX = e.getX(); |
|
1114 |
currentMouseY = e.getY(); |
|
1115 |
||
1116 |
// Clicked in the Thumb area? |
|
1117 |
if(getThumbBounds().contains(currentMouseX, currentMouseY)) { |
|
1118 |
switch (scrollbar.getOrientation()) { |
|
1119 |
case JScrollBar.VERTICAL: |
|
1120 |
offset = currentMouseY - getThumbBounds().y; |
|
1121 |
break; |
|
1122 |
case JScrollBar.HORIZONTAL: |
|
1123 |
offset = currentMouseX - getThumbBounds().x; |
|
1124 |
break; |
|
1125 |
} |
|
1126 |
isDragging = true; |
|
1127 |
return; |
|
1128 |
} |
|
1129 |
else if (getSupportsAbsolutePositioning() && |
|
1130 |
SwingUtilities.isMiddleMouseButton(e)) { |
|
1131 |
switch (scrollbar.getOrientation()) { |
|
1132 |
case JScrollBar.VERTICAL: |
|
1133 |
offset = getThumbBounds().height / 2; |
|
1134 |
break; |
|
1135 |
case JScrollBar.HORIZONTAL: |
|
1136 |
offset = getThumbBounds().width / 2; |
|
1137 |
break; |
|
1138 |
} |
|
1139 |
isDragging = true; |
|
1140 |
setValueFrom(e); |
|
1141 |
return; |
|
1142 |
} |
|
1143 |
isDragging = false; |
|
1144 |
||
1145 |
Dimension sbSize = scrollbar.getSize(); |
|
1146 |
direction = +1; |
|
1147 |
||
1148 |
switch (scrollbar.getOrientation()) { |
|
1149 |
case JScrollBar.VERTICAL: |
|
1150 |
if (getThumbBounds().isEmpty()) { |
|
1151 |
int scrollbarCenter = sbSize.height / 2; |
|
1152 |
direction = (currentMouseY < scrollbarCenter) ? -1 : +1; |
|
1153 |
} else { |
|
1154 |
int thumbY = getThumbBounds().y; |
|
1155 |
direction = (currentMouseY < thumbY) ? -1 : +1; |
|
1156 |
} |
|
1157 |
break; |
|
1158 |
case JScrollBar.HORIZONTAL: |
|
1159 |
if (getThumbBounds().isEmpty()) { |
|
1160 |
int scrollbarCenter = sbSize.width / 2; |
|
1161 |
direction = (currentMouseX < scrollbarCenter) ? -1 : +1; |
|
1162 |
} else { |
|
1163 |
int thumbX = getThumbBounds().x; |
|
1164 |
direction = (currentMouseX < thumbX) ? -1 : +1; |
|
1165 |
} |
|
1166 |
if (!scrollbar.getComponentOrientation().isLeftToRight()) { |
|
1167 |
direction = -direction; |
|
1168 |
} |
|
1169 |
break; |
|
1170 |
} |
|
1171 |
scrollByBlock(direction); |
|
1172 |
||
1173 |
scrollTimer.stop(); |
|
1174 |
scrollListener.setDirection(direction); |
|
1175 |
scrollListener.setScrollByBlock(true); |
|
1176 |
startScrollTimerIfNecessary(); |
|
1177 |
} |
|
1178 |
||
1179 |
||
1180 |
/** |
|
1181 |
* Set the models value to the position of the thumb's top of Vertical |
|
1182 |
* scrollbar, or the left/right of Horizontal scrollbar in |
|
1183 |
* left-to-right/right-to-left scrollbar relative to the origin of the |
|
1184 |
* track. |
|
1185 |
*/ |
|
1186 |
public void mouseDragged(MouseEvent e) { |
|
1187 |
if (SwingUtilities.isRightMouseButton(e) || |
|
1188 |
(!getSupportsAbsolutePositioning() && |
|
1189 |
SwingUtilities.isMiddleMouseButton(e))) |
|
1190 |
return; |
|
1191 |
if(!scrollbar.isEnabled() || getThumbBounds().isEmpty()) { |
|
1192 |
return; |
|
1193 |
} |
|
1194 |
if (isDragging) { |
|
1195 |
setValueFrom(e); |
|
1196 |
} else { |
|
1197 |
currentMouseX = e.getX(); |
|
1198 |
currentMouseY = e.getY(); |
|
1199 |
updateThumbState(currentMouseX, currentMouseY); |
|
1200 |
startScrollTimerIfNecessary(); |
|
1201 |
} |
|
1202 |
} |
|
1203 |
||
1204 |
private void setValueFrom(MouseEvent e) { |
|
1205 |
boolean active = isThumbRollover(); |
|
1206 |
BoundedRangeModel model = scrollbar.getModel(); |
|
1207 |
Rectangle thumbR = getThumbBounds(); |
|
1208 |
float trackLength; |
|
1209 |
int thumbMin, thumbMax, thumbPos; |
|
1210 |
||
1211 |
if (scrollbar.getOrientation() == JScrollBar.VERTICAL) { |
|
2658 | 1212 |
thumbMin = trackRect.y; |
1213 |
thumbMax = trackRect.y + trackRect.height - thumbR.height; |
|
2 | 1214 |
thumbPos = Math.min(thumbMax, Math.max(thumbMin, (e.getY() - offset))); |
1215 |
setThumbBounds(thumbR.x, thumbPos, thumbR.width, thumbR.height); |
|
1216 |
trackLength = getTrackBounds().height; |
|
1217 |
} |
|
1218 |
else { |
|
2658 | 1219 |
thumbMin = trackRect.x; |
1220 |
thumbMax = trackRect.x + trackRect.width - thumbR.width; |
|
2 | 1221 |
thumbPos = Math.min(thumbMax, Math.max(thumbMin, (e.getX() - offset))); |
1222 |
setThumbBounds(thumbPos, thumbR.y, thumbR.width, thumbR.height); |
|
1223 |
trackLength = getTrackBounds().width; |
|
1224 |
} |
|
1225 |
||
1226 |
/* Set the scrollbars value. If the thumb has reached the end of |
|
1227 |
* the scrollbar, then just set the value to its maximum. Otherwise |
|
1228 |
* compute the value as accurately as possible. |
|
1229 |
*/ |
|
1230 |
if (thumbPos == thumbMax) { |
|
1231 |
if (scrollbar.getOrientation() == JScrollBar.VERTICAL || |
|
1232 |
scrollbar.getComponentOrientation().isLeftToRight()) { |
|
1233 |
scrollbar.setValue(model.getMaximum() - model.getExtent()); |
|
1234 |
} else { |
|
1235 |
scrollbar.setValue(model.getMinimum()); |
|
1236 |
} |
|
1237 |
} |
|
1238 |
else { |
|
1239 |
float valueMax = model.getMaximum() - model.getExtent(); |
|
1240 |
float valueRange = valueMax - model.getMinimum(); |
|
1241 |
float thumbValue = thumbPos - thumbMin; |
|
1242 |
float thumbRange = thumbMax - thumbMin; |
|
1243 |
int value; |
|
1244 |
if (scrollbar.getOrientation() == JScrollBar.VERTICAL || |
|
1245 |
scrollbar.getComponentOrientation().isLeftToRight()) { |
|
1246 |
value = (int)(0.5 + ((thumbValue / thumbRange) * valueRange)); |
|
1247 |
} else { |
|
1248 |
value = (int)(0.5 + (((thumbMax - thumbPos) / thumbRange) * valueRange)); |
|
1249 |
} |
|
1250 |
||
1251 |
useCachedValue = true; |
|
1252 |
scrollBarValue = value + model.getMinimum(); |
|
1253 |
scrollbar.setValue(adjustValueIfNecessary(scrollBarValue)); |
|
1254 |
} |
|
1255 |
setThumbRollover(active); |
|
1256 |
} |
|
1257 |
||
1258 |
private int adjustValueIfNecessary(int value) { |
|
1259 |
if (scrollbar.getParent() instanceof JScrollPane) { |
|
1260 |
JScrollPane scrollpane = (JScrollPane)scrollbar.getParent(); |
|
1261 |
JViewport viewport = scrollpane.getViewport(); |
|
1262 |
Component view = viewport.getView(); |
|
1263 |
if (view instanceof JList) { |
|
1264 |
JList list = (JList)view; |
|
1265 |
if (DefaultLookup.getBoolean(list, list.getUI(), |
|
1266 |
"List.lockToPositionOnScroll", false)) { |
|
1267 |
int adjustedValue = value; |
|
1268 |
int mode = list.getLayoutOrientation(); |
|
1269 |
int orientation = scrollbar.getOrientation(); |
|
1270 |
if (orientation == JScrollBar.VERTICAL && mode == JList.VERTICAL) { |
|
1271 |
int index = list.locationToIndex(new Point(0, value)); |
|
1272 |
Rectangle rect = list.getCellBounds(index, index); |
|
1273 |
if (rect != null) { |
|
1274 |
adjustedValue = rect.y; |
|
1275 |
} |
|
1276 |
} |
|
1277 |
if (orientation == JScrollBar.HORIZONTAL && |
|
1278 |
(mode == JList.VERTICAL_WRAP || mode == JList.HORIZONTAL_WRAP)) { |
|
1279 |
if (scrollpane.getComponentOrientation().isLeftToRight()) { |
|
1280 |
int index = list.locationToIndex(new Point(value, 0)); |
|
1281 |
Rectangle rect = list.getCellBounds(index, index); |
|
1282 |
if (rect != null) { |
|
1283 |
adjustedValue = rect.x; |
|
1284 |
} |
|
1285 |
} |
|
1286 |
else { |
|
1287 |
Point loc = new Point(value, 0); |
|
1288 |
int extent = viewport.getExtentSize().width; |
|
1289 |
loc.x += extent - 1; |
|
1290 |
int index = list.locationToIndex(loc); |
|
1291 |
Rectangle rect = list.getCellBounds(index, index); |
|
1292 |
if (rect != null) { |
|
1293 |
adjustedValue = rect.x + rect.width - extent; |
|
1294 |
} |
|
1295 |
} |
|
1296 |
} |
|
1297 |
value = adjustedValue; |
|
1298 |
||
1299 |
} |
|
1300 |
} |
|
1301 |
} |
|
1302 |
return value; |
|
1303 |
} |
|
1304 |
||
1305 |
private void startScrollTimerIfNecessary() { |
|
1306 |
if (scrollTimer.isRunning()) { |
|
1307 |
return; |
|
1308 |
} |
|
1309 |
||
1310 |
Rectangle tb = getThumbBounds(); |
|
1311 |
||
1312 |
switch (scrollbar.getOrientation()) { |
|
1313 |
case JScrollBar.VERTICAL: |
|
1314 |
if (direction > 0) { |
|
1315 |
if (tb.y + tb.height < trackListener.currentMouseY) { |
|
1316 |
scrollTimer.start(); |
|
1317 |
} |
|
1318 |
} else if (tb.y > trackListener.currentMouseY) { |
|
1319 |
scrollTimer.start(); |
|
1320 |
} |
|
1321 |
break; |
|
1322 |
case JScrollBar.HORIZONTAL: |
|
1323 |
if ((direction > 0 && isMouseAfterThumb()) |
|
1324 |
|| (direction < 0 && isMouseBeforeThumb())) { |
|
1325 |
||
1326 |
scrollTimer.start(); |
|
1327 |
} |
|
1328 |
break; |
|
1329 |
} |
|
1330 |
} |
|
1331 |
||
1332 |
public void mouseMoved(MouseEvent e) { |
|
1333 |
if (!isDragging) { |
|
1334 |
updateThumbState(e.getX(), e.getY()); |
|
1335 |
} |
|
1336 |
} |
|
1337 |
||
1338 |
/** |
|
1339 |
* Invoked when the mouse exits the scrollbar. |
|
1340 |
* |
|
1341 |
* @param e MouseEvent further describing the event |
|
1342 |
* @since 1.5 |
|
1343 |
*/ |
|
1344 |
public void mouseExited(MouseEvent e) { |
|
1345 |
if (!isDragging) { |
|
1346 |
setThumbRollover(false); |
|
1347 |
} |
|
1348 |
} |
|
1349 |
} |
|
1350 |
||
1351 |
||
1352 |
/** |
|
1353 |
* Listener for cursor keys. |
|
1354 |
*/ |
|
1355 |
protected class ArrowButtonListener extends MouseAdapter |
|
1356 |
{ |
|
1357 |
// Because we are handling both mousePressed and Actions |
|
1358 |
// we need to make sure we don't fire under both conditions. |
|
1359 |
// (keyfocus on scrollbars causes action without mousePress |
|
1360 |
boolean handledEvent; |
|
1361 |
||
1362 |
public void mousePressed(MouseEvent e) { |
|
1363 |
if(!scrollbar.isEnabled()) { return; } |
|
1364 |
// not an unmodified left mouse button |
|
1365 |
//if(e.getModifiers() != InputEvent.BUTTON1_MASK) {return; } |
|
1366 |
if( ! SwingUtilities.isLeftMouseButton(e)) { return; } |
|
1367 |
||
1368 |
int direction = (e.getSource() == incrButton) ? 1 : -1; |
|
1369 |
||
1370 |
scrollByUnit(direction); |
|
1371 |
scrollTimer.stop(); |
|
1372 |
scrollListener.setDirection(direction); |
|
1373 |
scrollListener.setScrollByBlock(false); |
|
1374 |
scrollTimer.start(); |
|
1375 |
||
1376 |
handledEvent = true; |
|
1377 |
if (!scrollbar.hasFocus() && scrollbar.isRequestFocusEnabled()) { |
|
1378 |
scrollbar.requestFocus(); |
|
1379 |
} |
|
1380 |
} |
|
1381 |
||
1382 |
public void mouseReleased(MouseEvent e) { |
|
1383 |
scrollTimer.stop(); |
|
1384 |
handledEvent = false; |
|
1385 |
scrollbar.setValueIsAdjusting(false); |
|
1386 |
} |
|
1387 |
} |
|
1388 |
||
1389 |
||
1390 |
/** |
|
1391 |
* Listener for scrolling events initiated in the |
|
1392 |
* <code>ScrollPane</code>. |
|
1393 |
*/ |
|
1394 |
protected class ScrollListener implements ActionListener |
|
1395 |
{ |
|
1396 |
int direction = +1; |
|
1397 |
boolean useBlockIncrement; |
|
1398 |
||
1399 |
public ScrollListener() { |
|
1400 |
direction = +1; |
|
1401 |
useBlockIncrement = false; |
|
1402 |
} |
|
1403 |
||
1404 |
public ScrollListener(int dir, boolean block) { |
|
1405 |
direction = dir; |
|
1406 |
useBlockIncrement = block; |
|
1407 |
} |
|
1408 |
||
1409 |
public void setDirection(int direction) { this.direction = direction; } |
|
1410 |
public void setScrollByBlock(boolean block) { this.useBlockIncrement = block; } |
|
1411 |
||
1412 |
public void actionPerformed(ActionEvent e) { |
|
1413 |
if(useBlockIncrement) { |
|
1414 |
scrollByBlock(direction); |
|
1415 |
// Stop scrolling if the thumb catches up with the mouse |
|
1416 |
if(scrollbar.getOrientation() == JScrollBar.VERTICAL) { |
|
1417 |
if(direction > 0) { |
|
1418 |
if(getThumbBounds().y + getThumbBounds().height |
|
1419 |
>= trackListener.currentMouseY) |
|
1420 |
((Timer)e.getSource()).stop(); |
|
1421 |
} else if(getThumbBounds().y <= trackListener.currentMouseY) { |
|
1422 |
((Timer)e.getSource()).stop(); |
|
1423 |
} |
|
1424 |
} else { |
|
1425 |
if ((direction > 0 && !isMouseAfterThumb()) |
|
1426 |
|| (direction < 0 && !isMouseBeforeThumb())) { |
|
1427 |
||
1428 |
((Timer)e.getSource()).stop(); |
|
1429 |
} |
|
1430 |
} |
|
1431 |
} else { |
|
1432 |
scrollByUnit(direction); |
|
1433 |
} |
|
1434 |
||
1435 |
if(direction > 0 |
|
1436 |
&& scrollbar.getValue()+scrollbar.getVisibleAmount() |
|
1437 |
>= scrollbar.getMaximum()) |
|
1438 |
((Timer)e.getSource()).stop(); |
|
1439 |
else if(direction < 0 |
|
1440 |
&& scrollbar.getValue() <= scrollbar.getMinimum()) |
|
1441 |
((Timer)e.getSource()).stop(); |
|
1442 |
} |
|
1443 |
} |
|
1444 |
||
1445 |
private boolean isMouseLeftOfThumb() { |
|
1446 |
return trackListener.currentMouseX < getThumbBounds().x; |
|
1447 |
} |
|
1448 |
||
1449 |
private boolean isMouseRightOfThumb() { |
|
1450 |
Rectangle tb = getThumbBounds(); |
|
1451 |
return trackListener.currentMouseX > tb.x + tb.width; |
|
1452 |
} |
|
1453 |
||
1454 |
private boolean isMouseBeforeThumb() { |
|
1455 |
return scrollbar.getComponentOrientation().isLeftToRight() |
|
1456 |
? isMouseLeftOfThumb() |
|
1457 |
: isMouseRightOfThumb(); |
|
1458 |
} |
|
1459 |
||
1460 |
private boolean isMouseAfterThumb() { |
|
1461 |
return scrollbar.getComponentOrientation().isLeftToRight() |
|
1462 |
? isMouseRightOfThumb() |
|
1463 |
: isMouseLeftOfThumb(); |
|
1464 |
} |
|
1465 |
||
1466 |
private void updateButtonDirections() { |
|
1467 |
int orient = scrollbar.getOrientation(); |
|
1468 |
if (scrollbar.getComponentOrientation().isLeftToRight()) { |
|
1469 |
if (incrButton instanceof BasicArrowButton) { |
|
1470 |
((BasicArrowButton)incrButton).setDirection( |
|
1471 |
orient == HORIZONTAL? EAST : SOUTH); |
|
1472 |
} |
|
1473 |
if (decrButton instanceof BasicArrowButton) { |
|
1474 |
((BasicArrowButton)decrButton).setDirection( |
|
1475 |
orient == HORIZONTAL? WEST : NORTH); |
|
1476 |
} |
|
1477 |
} |
|
1478 |
else { |
|
1479 |
if (incrButton instanceof BasicArrowButton) { |
|
1480 |
((BasicArrowButton)incrButton).setDirection( |
|
1481 |
orient == HORIZONTAL? WEST : SOUTH); |
|
1482 |
} |
|
1483 |
if (decrButton instanceof BasicArrowButton) { |
|
1484 |
((BasicArrowButton)decrButton).setDirection( |
|
1485 |
orient == HORIZONTAL ? EAST : NORTH); |
|
1486 |
} |
|
1487 |
} |
|
1488 |
} |
|
1489 |
||
1490 |
public class PropertyChangeHandler implements PropertyChangeListener |
|
1491 |
{ |
|
1492 |
// NOTE: This class exists only for backward compatability. All |
|
1493 |
// its functionality has been moved into Handler. If you need to add |
|
1494 |
// new functionality add it to the Handler, but make sure this |
|
1495 |
// class calls into the Handler. |
|
1496 |
||
1497 |
public void propertyChange(PropertyChangeEvent e) { |
|
1498 |
getHandler().propertyChange(e); |
|
1499 |
} |
|
1500 |
} |
|
1501 |
||
1502 |
||
1503 |
/** |
|
1504 |
* Used for scrolling the scrollbar. |
|
1505 |
*/ |
|
1506 |
private static class Actions extends UIAction { |
|
1507 |
private static final String POSITIVE_UNIT_INCREMENT = |
|
1508 |
"positiveUnitIncrement"; |
|
1509 |
private static final String POSITIVE_BLOCK_INCREMENT = |
|
1510 |
"positiveBlockIncrement"; |
|
1511 |
private static final String NEGATIVE_UNIT_INCREMENT = |
|
1512 |
"negativeUnitIncrement"; |
|
1513 |
private static final String NEGATIVE_BLOCK_INCREMENT = |
|
1514 |
"negativeBlockIncrement"; |
|
1515 |
private static final String MIN_SCROLL = "minScroll"; |
|
1516 |
private static final String MAX_SCROLL = "maxScroll"; |
|
1517 |
||
1518 |
Actions(String name) { |
|
1519 |
super(name); |
|
1520 |
} |
|
1521 |
||
1522 |
public void actionPerformed(ActionEvent e) { |
|
1523 |
JScrollBar scrollBar = (JScrollBar)e.getSource(); |
|
1524 |
String key = getName(); |
|
1525 |
if (key == POSITIVE_UNIT_INCREMENT) { |
|
1526 |
scroll(scrollBar, POSITIVE_SCROLL, false); |
|
1527 |
} |
|
1528 |
else if (key == POSITIVE_BLOCK_INCREMENT) { |
|
1529 |
scroll(scrollBar, POSITIVE_SCROLL, true); |
|
1530 |
} |
|
1531 |
else if (key == NEGATIVE_UNIT_INCREMENT) { |
|
1532 |
scroll(scrollBar, NEGATIVE_SCROLL, false); |
|
1533 |
} |
|
1534 |
else if (key == NEGATIVE_BLOCK_INCREMENT) { |
|
1535 |
scroll(scrollBar, NEGATIVE_SCROLL, true); |
|
1536 |
} |
|
1537 |
else if (key == MIN_SCROLL) { |
|
1538 |
scroll(scrollBar, BasicScrollBarUI.MIN_SCROLL, true); |
|
1539 |
} |
|
1540 |
else if (key == MAX_SCROLL) { |
|
1541 |
scroll(scrollBar, BasicScrollBarUI.MAX_SCROLL, true); |
|
1542 |
} |
|
1543 |
} |
|
1544 |
private void scroll(JScrollBar scrollBar, int dir, boolean block) { |
|
1545 |
||
1546 |
if (dir == NEGATIVE_SCROLL || dir == POSITIVE_SCROLL) { |
|
1547 |
int amount; |
|
1548 |
// Don't use the BasicScrollBarUI.scrollByXXX methods as we |
|
1549 |
// don't want to use an invokeLater to reset the trackHighlight |
|
1550 |
// via an invokeLater |
|
1551 |
if (block) { |
|
1552 |
if (dir == NEGATIVE_SCROLL) { |
|
1553 |
amount = -1 * scrollBar.getBlockIncrement(-1); |
|
1554 |
} |
|
1555 |
else { |
|
1556 |
amount = scrollBar.getBlockIncrement(1); |
|
1557 |
} |
|
1558 |
} |
|
1559 |
else { |
|
1560 |
if (dir == NEGATIVE_SCROLL) { |
|
1561 |
amount = -1 * scrollBar.getUnitIncrement(-1); |
|
1562 |
} |
|
1563 |
else { |
|
1564 |
amount = scrollBar.getUnitIncrement(1); |
|
1565 |
} |
|
1566 |
} |
|
1567 |
scrollBar.setValue(scrollBar.getValue() + amount); |
|
1568 |
} |
|
1569 |
else if (dir == BasicScrollBarUI.MIN_SCROLL) { |
|
1570 |
scrollBar.setValue(scrollBar.getMinimum()); |
|
1571 |
} |
|
1572 |
else if (dir == BasicScrollBarUI.MAX_SCROLL) { |
|
1573 |
scrollBar.setValue(scrollBar.getMaximum()); |
|
1574 |
} |
|
1575 |
} |
|
1576 |
} |
|
1577 |
||
1578 |
||
1579 |
// |
|
1580 |
// EventHandler |
|
1581 |
// |
|
1582 |
private class Handler implements FocusListener, PropertyChangeListener { |
|
1583 |
// |
|
1584 |
// FocusListener |
|
1585 |
// |
|
1586 |
public void focusGained(FocusEvent e) { |
|
1587 |
scrollbar.repaint(); |
|
1588 |
} |
|
1589 |
||
1590 |
public void focusLost(FocusEvent e) { |
|
1591 |
scrollbar.repaint(); |
|
1592 |
} |
|
1593 |
||
1594 |
||
1595 |
// |
|
1596 |
// PropertyChangeListener |
|
1597 |
// |
|
1598 |
public void propertyChange(PropertyChangeEvent e) { |
|
1599 |
String propertyName = e.getPropertyName(); |
|
1600 |
||
1601 |
if ("model" == propertyName) { |
|
1602 |
BoundedRangeModel oldModel = (BoundedRangeModel)e.getOldValue(); |
|
1603 |
BoundedRangeModel newModel = (BoundedRangeModel)e.getNewValue(); |
|
1604 |
oldModel.removeChangeListener(modelListener); |
|
1605 |
newModel.addChangeListener(modelListener); |
|
6652
482a7a13ef22
6542335: different behavior on knob of scroll bar between 1.4.2 and 5.0
alexp
parents:
5506
diff
changeset
|
1606 |
scrollBarValue = scrollbar.getValue(); |
2 | 1607 |
scrollbar.repaint(); |
1608 |
scrollbar.revalidate(); |
|
1609 |
} else if ("orientation" == propertyName) { |
|
1610 |
updateButtonDirections(); |
|
1611 |
} else if ("componentOrientation" == propertyName) { |
|
1612 |
updateButtonDirections(); |
|
1613 |
InputMap inputMap = getInputMap(JComponent.WHEN_FOCUSED); |
|
1614 |
SwingUtilities.replaceUIInputMap(scrollbar, JComponent.WHEN_FOCUSED, inputMap); |
|
1615 |
} |
|
1616 |
} |
|
1617 |
} |
|
1618 |
} |