1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
import com.sun.star.uno.Type;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.table.XCell;
import com.sun.star.util.XModifyListener;
import com.sun.star.text.XTextRange;
/** a value binding to be connected to a form control
This binding synchronizes the text contained in a table cell (which you must
pass upon construction) to the text in an XBindableValue.
Well, in real it does not synchronize both directions. The ValueBinding
service has not much room for own activity: It allows notification of changes
in the own value, and it allows external instances to set the current value.
Note that we implement this binding as a separate thread, which is (more or
less permanently) polling for a new text at the cell. This is unfortunate, but
sadly the Writer table cells do not support actively notifying changes in their
content to other interested parties.
*/
public class TableCellTextBinding
extends java.lang.Thread
implements com.sun.star.form.binding.XValueBinding,
com.sun.star.util.XModifyBroadcaster
{
private XTextRange m_cellText;
private Object m_writeSignal;
private String m_newCellText;
private String m_lastKnownCellText;
private boolean m_haveNewCellText;
private java.util.List<XModifyListener> m_listeners;
/** Creates a new instance of TableCellTextBinding */
public TableCellTextBinding( XCell cell )
{
m_cellText = UnoRuntime.queryInterface( XTextRange.class, cell );
m_newCellText = "";
m_listeners = new java.util.LinkedList<XModifyListener>();
start();
}
/** retrieves the list of data types which this binding can exchange
*/
public com.sun.star.uno.Type[] getSupportedValueTypes()
{
try
{
// well, only strings here ...
return new Type[] {
getStringType()
};
}
catch( java.lang.Exception e )
{
}
return new Type[] { };
}
/** retrieves the current value
*/
public Object getValue(com.sun.star.uno.Type type) throws com.sun.star.form.binding.IncompatibleTypesException
{
if ( !type.equals( getStringType() ) )
throw new com.sun.star.form.binding.IncompatibleTypesException();
return m_cellText.getString();
}
/** sets a new value
*/
public void setValue(Object obj) throws com.sun.star.form.binding.IncompatibleTypesException
{
String text;
try
{
text = (String)obj;
}
catch( java.lang.ClassCastException e )
{
throw new com.sun.star.form.binding.IncompatibleTypesException();
}
// remember the new text
synchronized( m_newCellText )
{
m_newCellText = text;
m_haveNewCellText = true;
}
// and wake up the thread which is waiting for it
synchronized( m_writeSignal )
{
m_writeSignal.notify();
}
}
/** determines whether a given value type is supported
*/
public boolean supportsType(com.sun.star.uno.Type type)
{
return type.equals( getStringType() );
}
/** retrieves the UNO type for the string class
*/
private static final Type getStringType()
{
return new com.sun.star.uno.Type( String.class );
}
/** runs the thread
*/
@Override
public void run()
{
try
{
m_writeSignal = new Object();
while ( true )
{
// go sleep a while
synchronized( m_writeSignal )
{
m_writeSignal.wait( 200 );
}
// if there's new text in the control, propagate it to the cell
synchronized ( m_newCellText )
{
if ( m_haveNewCellText )
{
m_cellText.setString( m_newCellText );
m_lastKnownCellText = m_newCellText;
}
m_haveNewCellText = false;
}
// if there's new text in the cell, propagate it to the control
String currentCellText = m_cellText.getString();
if ( !currentCellText.equals( m_lastKnownCellText ) )
{
m_lastKnownCellText = currentCellText;
// notify the modification
synchronized( m_listeners )
{
com.sun.star.lang.EventObject eventSource = new com.sun.star.lang.EventObject( this );
java.util.Iterator<XModifyListener> loop = m_listeners.iterator();
while ( loop.hasNext() )
{
loop.next().modified( eventSource );
}
}
}
}
}
catch( java.lang.Exception e )
{
e.printStackTrace(System.err);
}
}
public void addModifyListener(com.sun.star.util.XModifyListener xModifyListener)
{
synchronized( m_listeners )
{
m_listeners.add( xModifyListener );
}
}
public void removeModifyListener(com.sun.star.util.XModifyListener xModifyListener)
{
synchronized( m_listeners )
{
m_listeners.remove( xModifyListener );
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
