JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */

package javax.swing.plaf.metal;

import javax.swing.*;
import javax.swing.border.*;
import java.io.Serializable;
import java.awt.*;
import java.awt.event.*;

import javax.swing.plaf.basic.BasicComboBoxEditor;

/**
 * The default editor for Metal editable combo boxes
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Steve Wilson
 */
@SuppressWarnings("serial") // Same-version serialization only
public class MetalComboBoxEditor extends BasicComboBoxEditor {

    /**
     * Constructs a new instance of {@code MetalComboBoxEditor}.
     */
    public MetalComboBoxEditor() {
        super();
        //editor.removeFocusListener(this);
        editor = new JTextField("",9) {
                // workaround for 4530952
                public void setText(String s) {
                    if (getText().equals(s)) {
                        return;
                    }
                    super.setText(s);
                }
            // The preferred and minimum sizes are overriden and padded by
            // 4 to keep the size as it previously was.  Refer to bugs
            // 4775789 and 4517214 for details.
            public Dimension getPreferredSize() {
                Dimension pref = super.getPreferredSize();
                pref.height += 4;
                return pref;
            }
            public Dimension getMinimumSize() {
                Dimension min = super.getMinimumSize();
                min.height += 4;
                return min;
            }
            };

        editor.setBorder( new EditorBorder() );
        //editor.addFocusListener(this);
    }

   /**
    * The default editor border <code>Insets</code>. This field
    * might not be used.
    */
    protected static Insets editorBorderInsets = new Insets( 2, 2, 2, 0 );

    class EditorBorder extends AbstractBorder {
        public void paintBorder(Component c, Graphics g, int x, int y, int w, int h) {
            g.translate( x, y );

            if (MetalLookAndFeel.usingOcean()) {
                g.setColor(MetalLookAndFeel.getControlDarkShadow());
                g.drawRect(0, 0, w, h - 1);
                g.setColor(MetalLookAndFeel.getControlShadow());
                g.drawRect(1, 1, w - 2, h - 3);
            }
            else {
                g.setColor( MetalLookAndFeel.getControlDarkShadow() );
                g.drawLine( 0, 0, w-1, 0 );
                g.drawLine( 0, 0, 0, h-2 );
                g.drawLine( 0, h-2, w-1, h-2 );
                g.setColor( MetalLookAndFeel.getControlHighlight() );
                g.drawLine( 1, 1, w-1, 1 );
                g.drawLine( 1, 1, 1, h-1 );
                g.drawLine( 1, h-1, w-1, h-1 );
                g.setColor( MetalLookAndFeel.getControl() );
                g.drawLine( 1, h-2, 1, h-2 );
            }

            g.translate( -x, -y );
        }

        public Insets getBorderInsets(Component c, Insets insets) {
            insets.set(2, 2, 2, 0);
            return insets;
        }
    }


    /**
     * A subclass of BasicComboBoxEditor that implements UIResource.
     * BasicComboBoxEditor doesn't implement UIResource
     * directly so that applications can safely override the
     * cellRenderer property with BasicListCellRenderer subclasses.
     * <p>
     * <strong>Warning:</strong>

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