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/*
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* Copyright 1997-2006 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package javax.swing.plaf.basic;
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import sun.swing.SwingUtilities2;
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import sun.swing.DefaultLookup;
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import sun.swing.UIAction;
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import javax.swing.*;
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import javax.swing.plaf.*;
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import javax.swing.text.View;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.awt.event.KeyEvent;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Dimension;
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import java.awt.Rectangle;
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import java.awt.Insets;
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import java.awt.Color;
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import java.awt.Graphics;
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import java.awt.Font;
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import java.awt.FontMetrics;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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/**
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* A Windows L&F implementation of LabelUI. This implementation
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* is completely static, i.e. there's only one UIView implementation
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* that's shared by all JLabel objects.
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*
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* @author Hans Muller
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*/
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public class BasicLabelUI extends LabelUI implements PropertyChangeListener
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{
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/**
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* The default <code>BasicLabelUI</code> instance. This field might
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* not be used. To change the default instance use a subclass which
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* overrides the <code>createUI</code> method, and place that class
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* name in defaults table under the key "LabelUI".
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*/
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protected static BasicLabelUI labelUI = new BasicLabelUI();
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private final static BasicLabelUI SAFE_BASIC_LABEL_UI = new BasicLabelUI();
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static void loadActionMap(LazyActionMap map) {
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map.put(new Actions(Actions.PRESS));
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map.put(new Actions(Actions.RELEASE));
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}
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/**
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* Forwards the call to SwingUtilities.layoutCompoundLabel().
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* This method is here so that a subclass could do Label specific
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* layout and to shorten the method name a little.
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*
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* @see SwingUtilities#layoutCompoundLabel
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*/
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protected String layoutCL(
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JLabel label,
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FontMetrics fontMetrics,
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String text,
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Icon icon,
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Rectangle viewR,
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Rectangle iconR,
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Rectangle textR)
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{
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return SwingUtilities.layoutCompoundLabel(
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(JComponent) label,
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fontMetrics,
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text,
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icon,
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label.getVerticalAlignment(),
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label.getHorizontalAlignment(),
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label.getVerticalTextPosition(),
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label.getHorizontalTextPosition(),
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viewR,
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iconR,
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textR,
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label.getIconTextGap());
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}
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/**
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* Paint clippedText at textX, textY with the labels foreground color.
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*
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* @see #paint
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* @see #paintDisabledText
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*/
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protected void paintEnabledText(JLabel l, Graphics g, String s, int textX, int textY)
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{
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int mnemIndex = l.getDisplayedMnemonicIndex();
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g.setColor(l.getForeground());
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SwingUtilities2.drawStringUnderlineCharAt(l, g, s, mnemIndex,
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textX, textY);
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}
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/**
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* Paint clippedText at textX, textY with background.lighter() and then
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* shifted down and to the right by one pixel with background.darker().
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*
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* @see #paint
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* @see #paintEnabledText
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*/
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protected void paintDisabledText(JLabel l, Graphics g, String s, int textX, int textY)
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{
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int accChar = l.getDisplayedMnemonicIndex();
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Color background = l.getBackground();
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g.setColor(background.brighter());
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SwingUtilities2.drawStringUnderlineCharAt(l, g, s, accChar,
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textX + 1, textY + 1);
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g.setColor(background.darker());
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SwingUtilities2.drawStringUnderlineCharAt(l, g, s, accChar,
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textX, textY);
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}
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/* These rectangles/insets are allocated once for this shared LabelUI
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* implementation. Re-using rectangles rather than allocating
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* them in each paint call halved the time it took paint to run.
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*/
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private static Rectangle paintIconR = new Rectangle();
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private static Rectangle paintTextR = new Rectangle();
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private static Rectangle paintViewR = new Rectangle();
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private static Insets paintViewInsets = new Insets(0, 0, 0, 0);
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/**
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* Paint the label text in the foreground color, if the label
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* is opaque then paint the entire background with the background
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* color. The Label text is drawn by paintEnabledText() or
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* paintDisabledText(). The locations of the label parts are computed
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* by layoutCL.
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*
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* @see #paintEnabledText
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* @see #paintDisabledText
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* @see #layoutCL
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*/
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public void paint(Graphics g, JComponent c)
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{
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JLabel label = (JLabel)c;
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String text = label.getText();
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Icon icon = (label.isEnabled()) ? label.getIcon() : label.getDisabledIcon();
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if ((icon == null) && (text == null)) {
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return;
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}
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FontMetrics fm = SwingUtilities2.getFontMetrics(label, g);
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String clippedText = layout(label, fm, c.getWidth(), c.getHeight());
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if (icon != null) {
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icon.paintIcon(c, g, paintIconR.x, paintIconR.y);
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}
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if (text != null) {
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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v.paint(g, paintTextR);
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} else {
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int textX = paintTextR.x;
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int textY = paintTextR.y + fm.getAscent();
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if (label.isEnabled()) {
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paintEnabledText(label, g, clippedText, textX, textY);
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}
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else {
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paintDisabledText(label, g, clippedText, textX, textY);
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}
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}
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}
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}
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private String layout(JLabel label, FontMetrics fm,
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int width, int height) {
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Insets insets = label.getInsets(paintViewInsets);
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String text = label.getText();
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Icon icon = (label.isEnabled()) ? label.getIcon() :
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label.getDisabledIcon();
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paintViewR.x = insets.left;
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paintViewR.y = insets.top;
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paintViewR.width = width - (insets.left + insets.right);
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paintViewR.height = height - (insets.top + insets.bottom);
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paintIconR.x = paintIconR.y = paintIconR.width = paintIconR.height = 0;
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paintTextR.x = paintTextR.y = paintTextR.width = paintTextR.height = 0;
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return layoutCL(label, fm, text, icon, paintViewR, paintIconR,
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paintTextR);
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}
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/* These rectangles/insets are allocated once for this shared LabelUI
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* implementation. Re-using rectangles rather than allocating
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* them in each getPreferredSize call sped up the method substantially.
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*/
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private static Rectangle iconR = new Rectangle();
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private static Rectangle textR = new Rectangle();
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private static Rectangle viewR = new Rectangle();
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private static Insets viewInsets = new Insets(0, 0, 0, 0);
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public Dimension getPreferredSize(JComponent c)
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{
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JLabel label = (JLabel)c;
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String text = label.getText();
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Icon icon = (label.isEnabled()) ? label.getIcon() :
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label.getDisabledIcon();
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Insets insets = label.getInsets(viewInsets);
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Font font = label.getFont();
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int dx = insets.left + insets.right;
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int dy = insets.top + insets.bottom;
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if ((icon == null) &&
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((text == null) ||
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((text != null) && (font == null)))) {
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return new Dimension(dx, dy);
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}
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else if ((text == null) || ((icon != null) && (font == null))) {
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return new Dimension(icon.getIconWidth() + dx,
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icon.getIconHeight() + dy);
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}
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else {
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FontMetrics fm = label.getFontMetrics(font);
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iconR.x = iconR.y = iconR.width = iconR.height = 0;
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textR.x = textR.y = textR.width = textR.height = 0;
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viewR.x = dx;
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viewR.y = dy;
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viewR.width = viewR.height = Short.MAX_VALUE;
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layoutCL(label, fm, text, icon, viewR, iconR, textR);
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int x1 = Math.min(iconR.x, textR.x);
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int x2 = Math.max(iconR.x + iconR.width, textR.x + textR.width);
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int y1 = Math.min(iconR.y, textR.y);
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int y2 = Math.max(iconR.y + iconR.height, textR.y + textR.height);
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Dimension rv = new Dimension(x2 - x1, y2 - y1);
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rv.width += dx;
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rv.height += dy;
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return rv;
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}
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}
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/**
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* @return getPreferredSize(c)
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*/
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public Dimension getMinimumSize(JComponent c) {
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Dimension d = getPreferredSize(c);
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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d.width -= v.getPreferredSpan(View.X_AXIS) - v.getMinimumSpan(View.X_AXIS);
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}
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return d;
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}
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/**
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* @return getPreferredSize(c)
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*/
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public Dimension getMaximumSize(JComponent c) {
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Dimension d = getPreferredSize(c);
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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d.width += v.getMaximumSpan(View.X_AXIS) - v.getPreferredSpan(View.X_AXIS);
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}
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return d;
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}
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/**
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* Returns the baseline.
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*
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* @throws NullPointerException {@inheritDoc}
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* @throws IllegalArgumentException {@inheritDoc}
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* @see javax.swing.JComponent#getBaseline(int, int)
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* @since 1.6
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*/
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public int getBaseline(JComponent c, int width, int height) {
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super.getBaseline(c, width, height);
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JLabel label = (JLabel)c;
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String text = label.getText();
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if (text == null || "".equals(text) || label.getFont() == null) {
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return -1;
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}
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FontMetrics fm = label.getFontMetrics(label.getFont());
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layout(label, fm, width, height);
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return BasicHTML.getBaseline(label, paintTextR.y, fm.getAscent(),
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paintTextR.width, paintTextR.height);
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}
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/**
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* Returns an enum indicating how the baseline of the component
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* changes as the size changes.
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*
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* @throws NullPointerException {@inheritDoc}
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* @see javax.swing.JComponent#getBaseline(int, int)
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* @since 1.6
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*/
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public Component.BaselineResizeBehavior getBaselineResizeBehavior(
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JComponent c) {
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super.getBaselineResizeBehavior(c);
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if (c.getClientProperty(BasicHTML.propertyKey) != null) {
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return Component.BaselineResizeBehavior.OTHER;
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}
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switch(((JLabel)c).getVerticalAlignment()) {
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case JLabel.TOP:
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return Component.BaselineResizeBehavior.CONSTANT_ASCENT;
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case JLabel.BOTTOM:
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return Component.BaselineResizeBehavior.CONSTANT_DESCENT;
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case JLabel.CENTER:
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return Component.BaselineResizeBehavior.CENTER_OFFSET;
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}
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return Component.BaselineResizeBehavior.OTHER;
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}
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public void installUI(JComponent c) {
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installDefaults((JLabel)c);
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installComponents((JLabel)c);
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installListeners((JLabel)c);
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installKeyboardActions((JLabel)c);
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}
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public void uninstallUI(JComponent c) {
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uninstallDefaults((JLabel)c);
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uninstallComponents((JLabel)c);
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uninstallListeners((JLabel)c);
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uninstallKeyboardActions((JLabel)c);
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}
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protected void installDefaults(JLabel c){
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LookAndFeel.installColorsAndFont(c, "Label.background", "Label.foreground", "Label.font");
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LookAndFeel.installProperty(c, "opaque", Boolean.FALSE);
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}
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protected void installListeners(JLabel c){
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c.addPropertyChangeListener(this);
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}
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protected void installComponents(JLabel c){
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BasicHTML.updateRenderer(c, c.getText());
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c.setInheritsPopupMenu(true);
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}
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protected void installKeyboardActions(JLabel l) {
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int dka = l.getDisplayedMnemonic();
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Component lf = l.getLabelFor();
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if ((dka != 0) && (lf != null)) {
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LazyActionMap.installLazyActionMap(l, BasicLabelUI.class,
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"Label.actionMap");
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InputMap inputMap = SwingUtilities.getUIInputMap
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(l, JComponent.WHEN_IN_FOCUSED_WINDOW);
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if (inputMap == null) {
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inputMap = new ComponentInputMapUIResource(l);
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SwingUtilities.replaceUIInputMap(l,
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JComponent.WHEN_IN_FOCUSED_WINDOW, inputMap);
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}
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inputMap.clear();
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inputMap.put(KeyStroke.getKeyStroke(dka, ActionEvent.ALT_MASK,
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false), "press");
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}
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else {
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InputMap inputMap = SwingUtilities.getUIInputMap
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(l, JComponent.WHEN_IN_FOCUSED_WINDOW);
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if (inputMap != null) {
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inputMap.clear();
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}
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}
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}
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protected void uninstallDefaults(JLabel c){
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}
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protected void uninstallListeners(JLabel c){
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c.removePropertyChangeListener(this);
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}
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protected void uninstallComponents(JLabel c){
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BasicHTML.updateRenderer(c, "");
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}
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protected void uninstallKeyboardActions(JLabel c) {
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SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_FOCUSED, null);
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SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_IN_FOCUSED_WINDOW,
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null);
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|
407 |
SwingUtilities.replaceUIActionMap(c, null);
|
|
408 |
}
|
|
409 |
|
|
410 |
public static ComponentUI createUI(JComponent c) {
|
|
411 |
if (System.getSecurityManager() != null) {
|
|
412 |
return SAFE_BASIC_LABEL_UI;
|
|
413 |
} else {
|
|
414 |
return labelUI;
|
|
415 |
}
|
|
416 |
}
|
|
417 |
|
|
418 |
public void propertyChange(PropertyChangeEvent e) {
|
|
419 |
String name = e.getPropertyName();
|
|
420 |
if (name == "text" || "font" == name || "foreground" == name) {
|
|
421 |
// remove the old html view client property if one
|
|
422 |
// existed, and install a new one if the text installed
|
|
423 |
// into the JLabel is html source.
|
|
424 |
JLabel lbl = ((JLabel) e.getSource());
|
|
425 |
String text = lbl.getText();
|
|
426 |
BasicHTML.updateRenderer(lbl, text);
|
|
427 |
}
|
|
428 |
else if (name == "labelFor" || name == "displayedMnemonic") {
|
|
429 |
installKeyboardActions((JLabel) e.getSource());
|
|
430 |
}
|
|
431 |
}
|
|
432 |
|
|
433 |
// When the accelerator is pressed, temporarily make the JLabel
|
|
434 |
// focusTraversable by registering a WHEN_FOCUSED action for the
|
|
435 |
// release of the accelerator. Then give it focus so it can
|
|
436 |
// prevent unwanted keyTyped events from getting to other components.
|
|
437 |
private static class Actions extends UIAction {
|
|
438 |
private static final String PRESS = "press";
|
|
439 |
private static final String RELEASE = "release";
|
|
440 |
|
|
441 |
Actions(String key) {
|
|
442 |
super(key);
|
|
443 |
}
|
|
444 |
|
|
445 |
public void actionPerformed(ActionEvent e) {
|
|
446 |
JLabel label = (JLabel)e.getSource();
|
|
447 |
String key = getName();
|
|
448 |
if (key == PRESS) {
|
|
449 |
doPress(label);
|
|
450 |
}
|
|
451 |
else if (key == RELEASE) {
|
|
452 |
doRelease(label);
|
|
453 |
}
|
|
454 |
}
|
|
455 |
|
|
456 |
private void doPress(JLabel label) {
|
|
457 |
Component labelFor = label.getLabelFor();
|
|
458 |
if (labelFor != null && labelFor.isEnabled()) {
|
|
459 |
InputMap inputMap = SwingUtilities.getUIInputMap(label, JComponent.WHEN_FOCUSED);
|
|
460 |
if (inputMap == null) {
|
|
461 |
inputMap = new InputMapUIResource();
|
|
462 |
SwingUtilities.replaceUIInputMap(label, JComponent.WHEN_FOCUSED, inputMap);
|
|
463 |
}
|
|
464 |
int dka = label.getDisplayedMnemonic();
|
|
465 |
inputMap.put(KeyStroke.getKeyStroke(dka, ActionEvent.ALT_MASK, true), RELEASE);
|
|
466 |
// Need this if ALT is released before the accelerator
|
|
467 |
inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ALT, 0, true), RELEASE);
|
|
468 |
label.requestFocus();
|
|
469 |
}
|
|
470 |
}
|
|
471 |
|
|
472 |
private void doRelease(JLabel label) {
|
|
473 |
Component labelFor = label.getLabelFor();
|
|
474 |
if (labelFor != null && labelFor.isEnabled()) {
|
|
475 |
InputMap inputMap = SwingUtilities.getUIInputMap(label, JComponent.WHEN_FOCUSED);
|
|
476 |
if (inputMap != null) {
|
|
477 |
// inputMap should never be null.
|
|
478 |
inputMap.remove(KeyStroke.getKeyStroke(label.getDisplayedMnemonic(), ActionEvent.ALT_MASK, true));
|
|
479 |
inputMap.remove(KeyStroke.getKeyStroke(KeyEvent.VK_ALT, 0, true));
|
|
480 |
}
|
|
481 |
if (labelFor instanceof Container &&
|
|
482 |
((Container) labelFor).isFocusCycleRoot()) {
|
|
483 |
labelFor.requestFocus();
|
|
484 |
} else {
|
|
485 |
SwingUtilities2.compositeRequestFocus(labelFor);
|
|
486 |
}
|
|
487 |
}
|
|
488 |
}
|
|
489 |
}
|
|
490 |
}
|