05fc3aef53
Replace the current license disclaimer in files by a SPDX-License-Identifier. Files that have to be modified by hand are modified. License files are organized under LICENSES directory. Task-number: QTBUG-67283 Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Lars Knoll <lars.knoll@qt.io> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
125 lines
4.3 KiB
C++
125 lines
4.3 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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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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#include <QtSql>
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BookWindow::BookWindow()
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{
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ui.setupUi(this);
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if (!QSqlDatabase::drivers().contains("QSQLITE"))
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QMessageBox::critical(
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this,
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"Unable to load database",
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"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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// 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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// Remember 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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// 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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// 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"),
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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"),
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Qt::Horizontal, tr("Rating"));
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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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// 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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// Initialize the Author combo box:
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ui.authorEdit->setModel(model->relationModel(authorIdx));
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ui.authorEdit->setModelColumn(
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model->relationModel(authorIdx)->fieldIndex("name"));
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ui.genreEdit->setModel(model->relationModel(genreIdx));
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ui.genreEdit->setModelColumn(
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model->relationModel(genreIdx)->fieldIndex("name"));
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// Lock and prohibit resizing of the width of the rating column:
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ui.bookTable->horizontalHeader()->setSectionResizeMode(
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model->fieldIndex("rating"),
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QHeaderView::ResizeToContents);
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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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connect(ui.bookTable->selectionModel(),
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&QItemSelectionModel::currentRowChanged,
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mapper,
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&QDataWidgetMapper::setCurrentModelIndex
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);
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ui.bookTable->setCurrentIndex(model->index(0, 0));
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createMenuBar();
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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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void BookWindow::createMenuBar()
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{
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QAction *quitAction = new QAction(tr("&Quit"), this);
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QAction *aboutAction = new QAction(tr("&About"), this);
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QAction *aboutQtAction = new QAction(tr("&About Qt"), this);
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QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
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fileMenu->addAction(quitAction);
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QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
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helpMenu->addAction(aboutAction);
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helpMenu->addAction(aboutQtAction);
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connect(quitAction, &QAction::triggered, this, &BookWindow::close);
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connect(aboutAction, &QAction::triggered, this, &BookWindow::about);
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connect(aboutQtAction, &QAction::triggered, qApp, &QApplication::aboutQt);
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}
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void BookWindow::about()
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{
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QMessageBox::about(this, tr("About Books"),
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tr("<p>The <b>Books</b> example shows how to use Qt SQL classes "
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"with a model/view framework."));
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}
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