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Java > Open Source Codes > org > eclipse > swt > custom > TextChangeListener


1 /*******************************************************************************
2  * Copyright (c) 2000, 2003 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.swt.custom;
12
13
14 import org.eclipse.swt.internal.SWTEventListener;
15
16 /**
17  * The StyledText widget implements this listener to receive
18  * notifications when changes to the model occur.
19  * It is not intended to be implemented by clients or by
20  * implementors of StyledTextContent.
21  * Clients should listen to the ModifyEvent or ExtendedModifyEvent
22  * that is sent by the StyledText widget to receive text change
23  * notifications.
24  * Implementors of StyledTextContent should call the textChanging
25  * and textChanged methods when text changes occur as described
26  * below. If the entire text is replaced the textSet method
27  * should be called instead.
28  */
29 public interface TextChangeListener extends SWTEventListener {
30
31 /**
32  * This method is called when the content is about to be changed.
33  * Callers also need to call the textChanged method after the
34  * content change has been applied. The widget only updates the
35  * screen properly when it receives both events.
36  *
37  * @param event the text changing event. All event fields need
38  * to be set by the sender.
39  * @see TextChangingEvent
40  */
41 public void textChanging(TextChangingEvent event);
42 /**
43  * This method is called when the content has changed.
44  * Callers need to have called the textChanging method prior to
45  * applying the content change and calling this method. The widget
46  * only updates the screen properly when it receives both events.
47  *
48  * @param event the text changed event
49  */
50 public void textChanged(TextChangedEvent event);
51 /**
52  * This method is called instead of the textChanging/textChanged
53  * combination when the entire old content has been replaced
54  * (e.g., by a call to StyledTextContent.setText()).
55  *
56  * @param event the text changed event
57  */
58 public void textSet(TextChangedEvent event);
59 }
60
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