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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "bookwindow.h"
#include "bookdelegate.h"
#include "initdb.h"
#include <QtSql>
BookWindow::BookWindow()
{
ui.setupUi(this);
if (!QSqlDatabase::drivers().contains("QSQLITE"))
QMessageBox::critical(this, "Unable to load database", "This demo needs the SQLITE driver");
// initialize the database
QSqlError err = initDb();
if (err.type() != QSqlError::NoError) {
showError(err);
return;
}
// Create the data model
model = new QSqlRelationalTableModel(ui.bookTable);
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
model->setTable("books");
// Remeber the indexes of the columns
authorIdx = model->fieldIndex("author");
genreIdx = model->fieldIndex("genre");
// Set the relations to the other database tables
model->setRelation(authorIdx, QSqlRelation("authors", "id", "name"));
model->setRelation(genreIdx, QSqlRelation("genres", "id", "name"));
// Set the localized header captions
model->setHeaderData(authorIdx, Qt::Horizontal, tr("Author Name"));
model->setHeaderData(genreIdx, Qt::Horizontal, tr("Genre"));
model->setHeaderData(model->fieldIndex("title"), Qt::Horizontal, tr("Title"));
model->setHeaderData(model->fieldIndex("year"), Qt::Horizontal, tr("Year"));
model->setHeaderData(model->fieldIndex("rating"), Qt::Horizontal, tr("Rating"));
// Populate the model
if (!model->select()) {
showError(model->lastError());
return;
}
// Set the model and hide the ID column
ui.bookTable->setModel(model);
ui.bookTable->setItemDelegate(new BookDelegate(ui.bookTable));
ui.bookTable->setColumnHidden(model->fieldIndex("id"), true);
ui.bookTable->setSelectionMode(QAbstractItemView::SingleSelection);
// Initialize the Author combo box
ui.authorEdit->setModel(model->relationModel(authorIdx));
ui.authorEdit->setModelColumn(model->relationModel(authorIdx)->fieldIndex("name"));
ui.genreEdit->setModel(model->relationModel(genreIdx));
ui.genreEdit->setModelColumn(model->relationModel(genreIdx)->fieldIndex("name"));
QDataWidgetMapper *mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new BookDelegate(this));
mapper->addMapping(ui.titleEdit, model->fieldIndex("title"));
mapper->addMapping(ui.yearEdit, model->fieldIndex("year"));
mapper->addMapping(ui.authorEdit, authorIdx);
mapper->addMapping(ui.genreEdit, genreIdx);
mapper->addMapping(ui.ratingEdit, model->fieldIndex("rating"));
connect(ui.bookTable->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
mapper, SLOT(setCurrentModelIndex(QModelIndex)));
ui.bookTable->setCurrentIndex(model->index(0, 0));
}
void BookWindow::showError(const QSqlError &err)
{
QMessageBox::critical(this, "Unable to initialize Database",
"Error initializing database: " + err.text());
}
|
