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1 /*
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2 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.ui;
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26
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27
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28 import java.awt.event.*;
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29 import javax.swing.*;
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30 import javax.swing.event.*;
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31
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32 /** Provides an editable text field with history. */
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33
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34 public class HistoryComboBox extends JComboBox {
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35 static final int HISTORY_LENGTH = 15;
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36
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37 public HistoryComboBox() {
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38 setEditable(true);
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39 addActionListener(new ActionListener() {
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40 public void actionPerformed(ActionEvent e) {
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41 Object text = getSelectedItem();
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42 if (text != null) {
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43 setText((String)text);
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44 }
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45 }
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46 });
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47 }
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48
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49 public String getText() {
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50 Object text = getSelectedItem();
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51 if (text == null) {
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52 return "";
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53 }
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54 return (String)text;
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55 }
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56
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57 public void setText(String text) {
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58 removeItem(text);
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59 insertItemAt(text, 0);
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60 setSelectedItem(text);
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61 int length = getModel().getSize();
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62 while (length > HISTORY_LENGTH) {
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63 removeItemAt(--length);
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64 }
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65 }
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66 }
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