1
|
/**
|
2
|
* Copyright (C) 2007 EDIT
|
3
|
* European Distributed Institute of Taxonomy
|
4
|
* http://www.e-taxonomy.eu
|
5
|
*
|
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.
|
8
|
*/
|
9
|
package eu.etaxonomy.taxeditor.editor.name.container;
|
10
|
|
11
|
import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;
|
12
|
import org.eclipse.jface.text.TextViewer;
|
13
|
import org.eclipse.swt.custom.StyledText;
|
14
|
import org.eclipse.swt.events.ModifyEvent;
|
15
|
import org.eclipse.swt.events.ModifyListener;
|
16
|
import org.eclipse.ui.forms.IManagedForm;
|
17
|
import org.eclipse.ui.forms.widgets.ScrolledForm;
|
18
|
|
19
|
/**
|
20
|
* Checks whether the ScrolledForm a TextViewer is on needs to be
|
21
|
* redrawn because of a new line break or the removal of an existing
|
22
|
* one ...
|
23
|
* <p>
|
24
|
* ... in theory, anyway. Until I figure out how to detect a word wrap,
|
25
|
* the ScrolledForm is redrawn with every modify event.
|
26
|
*
|
27
|
* @author p.ciardelli
|
28
|
* @created 19.05.2008
|
29
|
*/
|
30
|
public class LineWrapSupport {
|
31
|
private static final Logger logger = LogManager.getLogger(LineWrapSupport.class);
|
32
|
|
33
|
ModifyListener listener = new LineWrapListener();
|
34
|
int lineCount;
|
35
|
|
36
|
private StyledText textWidget;
|
37
|
private ScrolledForm scrolledForm;
|
38
|
|
39
|
// private TextViewer viewer;
|
40
|
|
41
|
/**
|
42
|
* <p>Constructor for LineWrapSupport.</p>
|
43
|
*
|
44
|
* @param viewer a {@link org.eclipse.jface.text.TextViewer} object.
|
45
|
* @param form a {@link org.eclipse.ui.forms.IManagedForm} object.
|
46
|
*/
|
47
|
// public TextViewer getViewer() {
|
48
|
// return viewer;
|
49
|
// }
|
50
|
public LineWrapSupport(TextViewer viewer, IManagedForm form) {
|
51
|
|
52
|
if (viewer == null) {
|
53
|
throw new IllegalArgumentException(
|
54
|
"The provided TextViewer object is null."); //$NON-NLS-1$
|
55
|
}
|
56
|
|
57
|
// this.viewer = viewer;
|
58
|
|
59
|
textWidget = viewer.getTextWidget();
|
60
|
textWidget.addModifyListener(listener);
|
61
|
|
62
|
this.lineCount = textWidget.getLinePixel(textWidget.getLineCount());
|
63
|
this.scrolledForm = form.getForm();
|
64
|
|
65
|
logger.trace(this.getClass().getSimpleName() + " created"); //$NON-NLS-1$
|
66
|
}
|
67
|
|
68
|
/**
|
69
|
* Redraws the scrolledForm if a line wrap is detected.
|
70
|
*/
|
71
|
private void checkLineCount() {
|
72
|
|
73
|
boolean lineWrapDetected = true;
|
74
|
if (lineWrapDetected ) {
|
75
|
scrolledForm.getBody().layout();
|
76
|
}
|
77
|
}
|
78
|
|
79
|
/**
|
80
|
* Calls <code>checkLineCount()</code> on a modify event.
|
81
|
*
|
82
|
* @author p.ciardelli
|
83
|
* @created 21.05.2008
|
84
|
*/
|
85
|
class LineWrapListener implements ModifyListener {
|
86
|
|
87
|
@Override
|
88
|
public void modifyText(ModifyEvent e) {
|
89
|
checkLineCount();
|
90
|
}
|
91
|
}
|
92
|
}
|