01: /*
02: * Copyright (C) 2005 Jeff Tassin
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2.1 of the License, or (at your option) any later version.
08: *
09: * This library 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 GNU
12: * Lesser General Public License for more details.
13: *
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, write to the Free Software
16: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17: */
18:
19: package com.jeta.swingbuilder.gui.components;
20:
21: import javax.swing.text.AttributeSet;
22: import javax.swing.text.BadLocationException;
23: import javax.swing.text.PlainDocument;
24:
25: import com.jeta.swingbuilder.gui.utils.FormDesignerUtils;
26:
27: /**
28: * Document that only allows floating point values for a text field
29: *
30: * @author Jeff Tassin
31: */
32: public class FloatDocument extends PlainDocument {
33: private boolean m_signed = true;
34:
35: public FloatDocument() {
36:
37: }
38:
39: public FloatDocument(boolean signed) {
40: m_signed = signed;
41: }
42:
43: public void insertString(int offs, String str, AttributeSet a)
44: throws BadLocationException {
45: if (str == null) {
46: return;
47: }
48:
49: str = FormDesignerUtils.fastTrim(str);
50: StringBuffer sbuff = new StringBuffer();
51: for (int index = 0; index < str.length(); index++) {
52: char c = str.charAt(index);
53: if (Character.isDigit(c) || c == '.' || c == ' ') {
54: if (m_signed || c != '-') {
55: sbuff.append(c);
56: continue;
57: }
58: }
59: return;
60: }
61:
62: if (sbuff.length() > 0) {
63: super.insertString(offs, sbuff.toString(), a);
64: }
65:
66: }
67: }
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