qt5base-lts/examples/sql/books/bookwindow.cpp
Casper van Donderen e0d5221957 Move all other demos in qtbase to examples.
Change-Id: Iab0e7364d1f6b348d0e3033ea9304139f5bd6d0d
Reviewed-on: http://codereview.qt.nokia.com/617
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: David Boddie
2011-06-24 16:47:24 +02:00

122 lines
4.6 KiB
C++

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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
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** $QT_END_LICENSE$
**
****************************************************************************/
#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");
// Remember 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());
}