2 * Copyright (C) 2007 EDIT
3 * European Distributed Institute of Taxonomy
4 * http://www.e-taxonomy.eu
6 * The contents of this file are subject to the Mozilla Public License Version 1.1
7 * See LICENSE.TXT at the top of this package for the full license terms.
10 package eu
.etaxonomy
.taxeditor
.editor
;
12 import org
.apache
.log4j
.Logger
;
13 import org
.eclipse
.jface
.text
.TextViewer
;
14 import org
.eclipse
.swt
.custom
.StyledText
;
15 import org
.eclipse
.swt
.events
.ModifyEvent
;
16 import org
.eclipse
.swt
.events
.ModifyListener
;
17 import org
.eclipse
.swt
.widgets
.Composite
;
18 import org
.eclipse
.ui
.forms
.IManagedForm
;
19 import org
.eclipse
.ui
.forms
.widgets
.ScrolledForm
;
22 * Checks whether the ScrolledForm a TextViewer is on needs to be
23 * redrawn because of a new line break or the removal of an existing
26 * ... in theory, anyway. Until I figure out how to detect a word wrap,
27 * the ScrolledForm is redrawn with every modify event.
33 public class LineWrapSupport
{
34 private static final Logger logger
= Logger
35 .getLogger(LineWrapSupport
.class);
37 ModifyListener listener
= new LineWrapListener();
40 private StyledText textWidget
;
41 private ScrolledForm scrolledForm
;
43 private TextViewer viewer
;
45 public LineWrapSupport(TextViewer viewer
, IManagedForm form
) {
48 throw new IllegalArgumentException(
49 "The provided TextViewer object is null.");
54 textWidget
= viewer
.getTextWidget();
55 textWidget
.addModifyListener(listener
);
57 this.lineCount
= textWidget
.getLinePixel(textWidget
.getLineCount());
58 this.scrolledForm
= form
.getForm();
62 * Redraws the scrolledForm if a line wrap is detected.
64 private void checkLineCount() {
66 boolean lineWrapDetected
= true;
67 if (lineWrapDetected
) {
68 scrolledForm
.getBody().layout();
73 * Calls <code>checkLineCount()</code> on a modify event.
79 class LineWrapListener
implements ModifyListener
{
81 public void modifyText(ModifyEvent e
) {