summaryrefslogtreecommitdiffstats
path: root/src/qt3support/sql/q3sqlselectcursor.cpp
blob: 1952c946244db8b27e4217efe3e0af29e5685ce4 (plain)
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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights.  These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "q3sqlselectcursor.h"
#include "qsqldriver.h"
#include "q3sqlrecordinfo.h"

#ifndef QT_NO_SQL

QT_BEGIN_NAMESPACE

class Q3SqlSelectCursorPrivate
{
public:
    Q3SqlSelectCursorPrivate() : populated(false) {}
    QString query;
    bool populated : 1;
};

/*!
    \class Q3SqlSelectCursor
    \brief The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements.

    \compat

    Q3SqlSelectCursor is a convenience class that makes it possible to
    display result sets from general SQL \c SELECT statements in
    data-aware Qt widgets. Q3SqlSelectCursor is read-only and does not
    support \c INSERT, \c UPDATE or \c DELETE operations.

    Pass the query in at construction time, or use the
    Q3SqlSelectCursor::exec() function.

    Example:
    \snippet doc/src/snippets/code/src_qt3support_sql_q3sqlselectcursor.cpp 0
*/

/*!
    Constructs a read only cursor on database \a db using the query \a query.
 */
Q3SqlSelectCursor::Q3SqlSelectCursor(const QString& query, QSqlDatabase db)
    : Q3SqlCursor(QString(), false, db)
{
    d = new Q3SqlSelectCursorPrivate;
    d->query = query;
    Q3SqlCursor::setMode(ReadOnly);
    if (!query.isEmpty())
        exec(query);
}

/*! Constructs a copy of \a other */
Q3SqlSelectCursor::Q3SqlSelectCursor(const Q3SqlSelectCursor& other)
    : Q3SqlCursor(other)
{
    d = new Q3SqlSelectCursorPrivate;
    d->query = other.d->query;
    d->populated = other.d->populated;
}

/*! Destroys the object and frees any allocated resources */
Q3SqlSelectCursor::~Q3SqlSelectCursor()
{
    delete d;
}

/*! \internal */
bool Q3SqlSelectCursor::exec(const QString& query)
{
    d->query = query;
    bool ret = Q3SqlCursor::exec(query);
    if (ret) {
        Q3SqlCursor::clear();
        populateCursor();
    }
    return ret;
}

/*! \fn bool Q3SqlSelectCursor::select()
    \internal
*/

/*! \internal */
bool Q3SqlSelectCursor::select(const QString&, const QSqlIndex&)
{
    bool ret = Q3SqlCursor::exec(d->query);
    if (ret && !d->populated)
        populateCursor();
    return ret;
}

/*! \internal */
void Q3SqlSelectCursor::populateCursor()
{
    Q3SqlRecordInfo inf = Q3SqlRecordInfo(record());
    for (Q3SqlRecordInfo::const_iterator it = inf.begin(); it != inf.end(); ++it)
        Q3SqlCursor::append(*it);
    d->populated = true;
}

/*! \fn QSqlIndex Q3SqlSelectCursor::primaryIndex(bool) const
    \internal
*/

/*! \fn QSqlIndex Q3SqlSelectCursor::index(const QStringList&) const
    \internal
*/

/*! \fn QSqlIndex Q3SqlSelectCursor::index(const QString&) const
    \internal
*/

/*! \fn QSqlIndex Q3SqlSelectCursor::index(const char*) const
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setPrimaryIndex(const QSqlIndex&)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::append(const Q3SqlFieldInfo&)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::insert(int, const Q3SqlFieldInfo&)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::remove(int)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::clear()
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setGenerated(const QString&, bool)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setGenerated(int, bool)
    \internal
*/

/*! \fn QSqlRecord* Q3SqlSelectCursor::editBuffer(bool)
    \internal
*/

/*! \fn QSqlRecord* Q3SqlSelectCursor::primeInsert()
    \internal
*/

/*! \fn QSqlRecord* Q3SqlSelectCursor::primeUpdate()
    \internal
*/

/*! \fn QSqlRecord* Q3SqlSelectCursor::primeDelete()
    \internal
*/

/*! \fn int Q3SqlSelectCursor::insert(bool)
    \internal
*/

/*! \fn int Q3SqlSelectCursor::update(bool)
    \internal
*/

/*! \fn int Q3SqlSelectCursor::del(bool)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setMode(int)
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setSort(const QSqlIndex&)
    \internal
*/

/*! \fn QSqlIndex Q3SqlSelectCursor::sort() const
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setFilter(const QString&)
    \internal
*/

/*! \fn QString Q3SqlSelectCursor::filter() const
    \internal
*/

/*! \fn void Q3SqlSelectCursor::setName(const QString&, bool)
    \internal
*/

/*! \fn QString Q3SqlSelectCursor::name() const
    \internal
*/

/*! \fn QString Q3SqlSelectCursor::toString(const QString&, const QString&) const
    \internal
*/

/*!
    \fn int Q3SqlSelectCursor::update(const QString & filter, bool invalidate = true)
    \overload

    Updates the database with the current contents of the cursor edit
    buffer using the specified \a filter. Returns the number of
    records which were updated.
    For error information, use lastError().

    Only records which meet the filter criteria are updated, otherwise
    all records in the table are updated.

    If \a invalidate is true (the default), the cursor can no longer
    be navigated. A new select() call must be made before you can move
    to a valid record.

    \sa Q3SqlCursor::update() primeUpdate() setMode() lastError()
*/

QT_END_NAMESPACE

#endif // QT_NO_SQL