/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "bookwindow.h"+
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#include "bookdelegate.h"+
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#include "initdb.h"+
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+
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#include <QtSql>+
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+
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BookWindow::BookWindow()+
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{+
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    ui.setupUi(this);+
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+
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    if (!QSqlDatabase::drivers().contains("QSQLITE"))+
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        QMessageBox::critical(this, "Unable to load database", "This demo needs the SQLITE driver");+
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+
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    // initialize the database+
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    QSqlError err = initDb();+
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    if (err.type() != QSqlError::NoError) {+
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        showError(err);+
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        return;+
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    }+
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+
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    // Create the data model+
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    model = new QSqlRelationalTableModel(ui.bookTable);+
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    model->setEditStrategy(QSqlTableModel::OnManualSubmit);+
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    model->setTable("books");+
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+
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    // Remeber the indexes of the columns+
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    authorIdx = model->fieldIndex("author");+
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    genreIdx = model->fieldIndex("genre");+
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+
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    // Set the relations to the other database tables+
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    model->setRelation(authorIdx, QSqlRelation("authors", "id", "name"));+
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    model->setRelation(genreIdx, QSqlRelation("genres", "id", "name"));+
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+
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    // Set the localized header captions+
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    model->setHeaderData(authorIdx, Qt::Horizontal, tr("Author Name"));+
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    model->setHeaderData(genreIdx, Qt::Horizontal, tr("Genre"));+
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    model->setHeaderData(model->fieldIndex("title"), Qt::Horizontal, tr("Title"));+
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    model->setHeaderData(model->fieldIndex("year"), Qt::Horizontal, tr("Year"));+
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    model->setHeaderData(model->fieldIndex("rating"), Qt::Horizontal, tr("Rating"));+
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+
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    // Populate the model+
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    if (!model->select()) {+
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        showError(model->lastError());+
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        return;+
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    }+
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+
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    // Set the model and hide the ID column+
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    ui.bookTable->setModel(model);+
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    ui.bookTable->setItemDelegate(new BookDelegate(ui.bookTable));+
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    ui.bookTable->setColumnHidden(model->fieldIndex("id"), true);+
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    ui.bookTable->setSelectionMode(QAbstractItemView::SingleSelection);+
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+
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    // Initialize the Author combo box+
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    ui.authorEdit->setModel(model->relationModel(authorIdx));+
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    ui.authorEdit->setModelColumn(model->relationModel(authorIdx)->fieldIndex("name"));+
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+
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    ui.genreEdit->setModel(model->relationModel(genreIdx));+
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    ui.genreEdit->setModelColumn(model->relationModel(genreIdx)->fieldIndex("name"));+
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+
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    QDataWidgetMapper *mapper = new QDataWidgetMapper(this);+
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    mapper->setModel(model);+
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    mapper->setItemDelegate(new BookDelegate(this));+
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    mapper->addMapping(ui.titleEdit, model->fieldIndex("title"));+
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    mapper->addMapping(ui.yearEdit, model->fieldIndex("year"));+
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    mapper->addMapping(ui.authorEdit, authorIdx);+
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    mapper->addMapping(ui.genreEdit, genreIdx);+
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    mapper->addMapping(ui.ratingEdit, model->fieldIndex("rating"));+
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+
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    connect(ui.bookTable->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),+
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            mapper, SLOT(setCurrentModelIndex(QModelIndex)));+
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+
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    ui.bookTable->setCurrentIndex(model->index(0, 0));+
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}+
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+
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void BookWindow::showError(const QSqlError &err)+
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{+
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    QMessageBox::critical(this, "Unable to initialize Database",+
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                "Error initializing database: " + err.text());+
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}+
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+
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