author | Dan Labrecque <dan.labrecque@oracle.com> |
Thu, 24 May 2012 04:16:47 -0400 | |
changeset 827 | 0944d8c0158b |
permissions | -rw-r--r-- |
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/* |
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* CDDL HEADER START |
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* |
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* The contents of this file are subject to the terms of the |
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* Common Development and Distribution License (the "License"). |
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* You may not use this file except in compliance with the License. |
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* |
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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* or http://www.opensolaris.org/os/licensing. |
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* See the License for the specific language governing permissions |
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* and limitations under the License. |
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* |
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* When distributing Covered Code, include this CDDL HEADER in each |
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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* If applicable, add the following below this CDDL HEADER, with the |
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* fields enclosed by brackets "[]" replaced with your own identifying |
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* information: Portions Copyright [yyyy] [name of copyright owner] |
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* |
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* CDDL HEADER END |
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*/ |
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|
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/* |
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* Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved. |
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*/ |
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|
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package com.oracle.solaris.vp.util.swing; |
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|
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import javax.swing.JTextArea; |
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import javax.swing.event.DocumentEvent; |
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import javax.swing.text.*; |
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/** |
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* The {@code AutoHideTextArea} is a {@code JTextArea} whose visibility is |
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* automatically set to {@code false} when its text is {@code null} or empty, |
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* {@code true} otherwise. |
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*/ |
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@SuppressWarnings({"serial"}) |
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public class AutoHideTextArea extends JTextArea { |
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public static class AutoHideListener extends DocumentAdapter { |
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// |
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// Instance data |
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// |
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private JTextComponent comp; |
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// |
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// DocumentAdapter methods |
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// |
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@Override |
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public void docUpdate(DocumentEvent event) { |
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setVisible(); |
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} |
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// |
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// AutoHideListener methods |
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// |
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public void deinit() { |
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comp.getDocument().removeDocumentListener(this); |
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this.comp = null; |
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} |
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public void init(JTextComponent comp) { |
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this.comp = comp; |
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comp.getDocument().addDocumentListener(this); |
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setVisible(); |
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} |
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// |
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// Private methods |
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// |
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/** |
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* Sets the visibility of the given {@code JTextComponent} based on |
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* whether it has a non-{@code null}/empty text. |
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*/ |
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private void setVisible() { |
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String text = comp.getText(); |
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comp.setVisible(text != null && !text.isEmpty()); |
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} |
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} |
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// |
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// Static data |
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// |
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private static final AutoHideListener LISTENER = new AutoHideListener(); |
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// |
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// Constructors |
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// |
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public AutoHideTextArea() { |
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init(); |
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} |
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public AutoHideTextArea(Document doc) { |
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super(doc); |
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init(); |
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} |
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public AutoHideTextArea(Document doc, String text, int rows, int columns) { |
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super(doc, text, rows, columns); |
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init(); |
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} |
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public AutoHideTextArea(int rows, int columns) { |
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super(rows, columns); |
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init(); |
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} |
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public AutoHideTextArea(String text) { |
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super(text); |
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init(); |
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} |
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public AutoHideTextArea(String text, int rows, int columns) { |
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super(text, rows, columns); |
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init(); |
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} |
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// |
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// Private methods |
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// |
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private void init() { |
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autoHide(this); |
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} |
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// |
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// Static methods |
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// |
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/** |
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* Add an {@link AutoHideListener} to the given {@code JTextComponent} to |
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* automatically set its visibility whenever its text or icon properties |
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* change. |
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* |
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* @return the added {@link AutoHideListener} |
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*/ |
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public static AutoHideListener autoHide(JTextComponent comp) { |
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LISTENER.init(comp); |
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return LISTENER; |
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} |
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} |