01: package net.sourceforge.squirrel_sql.fw.gui;
02:
03: /*
04: * Copyright (C) 2001-2003 Colin Bell
05: * colbell@users.sourceforge.net
06: *
07: * This library is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU Lesser General Public
09: * License as published by the Free Software Foundation; either
10: * version 2.1 of the License, or (at your option) any later version.
11: *
12: * This library is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this library; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20: */
21: import javax.swing.*;
22:
23: public class MemoryComboBox extends JComboBox {
24: private static final long serialVersionUID = -1059386228875239787L;
25:
26: public final static int NO_MAX = -1;
27:
28: private int _maxMemoryCount = NO_MAX;
29:
30: public MemoryComboBox() {
31: this (NO_MAX);
32: }
33:
34: public MemoryComboBox(int maxMemoryCount) {
35: super ();
36: setMaxMemoryCount(maxMemoryCount);
37: }
38:
39: public void setMaxMemoryCount(int value) {
40: _maxMemoryCount = (value > NO_MAX) ? value : NO_MAX;
41: }
42:
43: public void addItem(Object item) {
44: if (item != null) {
45: removeItem(item);
46: insertItemAt(item, 0);
47: setSelectedIndex(0);
48: if (_maxMemoryCount > NO_MAX
49: && getItemCount() > _maxMemoryCount) {
50: removeItemAt(getItemCount() - 1);
51: }
52: }
53: }
54:
55: public void insertItemAt(Object anObject, int index) {
56: super .insertItemAt(anObject, index);
57:
58: SwingUtilities.invokeLater(new Runnable() {
59: public void run() {
60: while (_maxMemoryCount > NO_MAX
61: && getItemCount() > _maxMemoryCount) {
62: removeItemAt(0);
63: }
64: }
65: });
66: }
67:
68: }
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