01: // The contents of this file are subject to the Mozilla Public License Version
02: // 1.1
03: //(the "License"); you may not use this file except in compliance with the
04: //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
05: //
06: //Software distributed under the License is distributed on an "AS IS" basis,
07: //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
08: //for the specific language governing rights and
09: //limitations under the License.
10: //
11: //The Original Code is "The Columba Project"
12: //
13: //The Initial Developers of the Original Code are Frederik Dietz and Timo
14: // Stich.
15: //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
16: //
17: //All Rights Reserved.
18: package org.columba.chat.ui.conversation;
19:
20: import javax.swing.JTextArea;
21: import javax.swing.event.DocumentEvent;
22: import javax.swing.event.DocumentListener;
23:
24: /**
25: * @author fdietz
26: *
27: */
28: public class SendingMessageController extends JTextArea implements
29: DocumentListener {
30:
31: private ChatMediator mediator;
32:
33: public SendingMessageController(ChatMediator mediator) {
34: super (5, 30);
35:
36: setWrapStyleWord(true);
37:
38: this .mediator = mediator;
39:
40: getDocument().addDocumentListener(this );
41:
42: }
43:
44: public void insertUpdate(DocumentEvent e) {
45: enableButton();
46: }
47:
48: public void removeUpdate(DocumentEvent e) {
49: enableButton();
50: }
51:
52: public void changedUpdate(DocumentEvent e) {
53: enableButton();
54: }
55:
56: private void enableButton() {
57: if (getText().length() > 0) {
58: mediator.getSendButton().setEnabled(true);
59: } else {
60: mediator.getSendButton().setEnabled(false);
61: }
62: }
63: }
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