1 /*
2 * Copyright (C) 2000 Bill Bereza
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Bill Bereza
19 * email : bereza@pobox.com
20 * url : http://www.pobox.com/~bereza/
21 */
22 package net.bereza.money.gui;
23
24 import javax.swing;
25 import javax.swing.text;
26
27 public class NumberField extends JTextField
28 {
29 protected boolean decimals=true;
30
31 public NumberField(String in, int cols)
32 {
33 super(in, cols);
34 }
35
36 public NumberField(int cols)
37 {
38 super(cols);
39 }
40
41 public NumberField(int cols, boolean decimals)
42 {
43 super(cols);
44 this.decimals=decimals;
45 }
46
47 protected Document createDefaultModel()
48 {
49 return new NumberDocument();
50 }
51
52 class NumberDocument extends PlainDocument
53 {
54 public void insertString(int offs, String str, AttributeSet a)
55 throws BadLocationException
56 {
57
58 if (str == null)
59 {
60 return;
61 }
62 char[] upper = str.toCharArray();
63 char[] nums = new char[upper.length];
64 int numi=0;
65 String text=this.getText(0, getLength());
66 boolean decimalPoint=(text.indexOf('.')>=0) || !decimals;
67
68 for (int i = 0; i < upper.length;i++)
69 {
70 if(Character.isDigit(upper[i])
71 || (upper[i] == '.' && !decimalPoint)
72 || (offs == 0 && i == 0 && upper[i] == '-'))
73 {
74 if(upper[i] == '.')
75 {
76 decimalPoint=true;
77 }
78
79 nums[numi++] = upper[i];
80 }
81 }
82 super.insertString(offs, new String(nums, 0, numi), a);
83 }
84 }
85 }
86
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