mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-23 12:07:03 +08:00
126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
|
|
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
|
|
|
|
#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"));
|
|
|
|
// Lock and prohibit resizing of the width of the rating column:
|
|
ui.bookTable->horizontalHeader()->setSectionResizeMode(
|
|
model->fieldIndex("rating"),
|
|
QHeaderView::ResizeToContents);
|
|
|
|
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(),
|
|
&QItemSelectionModel::currentRowChanged,
|
|
mapper,
|
|
&QDataWidgetMapper::setCurrentModelIndex
|
|
);
|
|
|
|
ui.bookTable->setCurrentIndex(model->index(0, 0));
|
|
ui.bookTable->selectRow(0);
|
|
createMenuBar();
|
|
}
|
|
|
|
void BookWindow::showError(const QSqlError &err)
|
|
{
|
|
QMessageBox::critical(this, "Unable to initialize Database",
|
|
"Error initializing database: " + err.text());
|
|
}
|
|
|
|
void BookWindow::createMenuBar()
|
|
{
|
|
QAction *quitAction = new QAction(tr("&Quit"), this);
|
|
QAction *aboutAction = new QAction(tr("&About"), this);
|
|
QAction *aboutQtAction = new QAction(tr("&About Qt"), this);
|
|
|
|
QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
|
|
fileMenu->addAction(quitAction);
|
|
|
|
QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
|
|
helpMenu->addAction(aboutAction);
|
|
helpMenu->addAction(aboutQtAction);
|
|
|
|
connect(quitAction, &QAction::triggered, qApp, &QCoreApplication::quit);
|
|
connect(aboutAction, &QAction::triggered, this, &BookWindow::about);
|
|
connect(aboutQtAction, &QAction::triggered, qApp, &QApplication::aboutQt);
|
|
}
|
|
|
|
void BookWindow::about()
|
|
{
|
|
QMessageBox::about(this, tr("About Books"),
|
|
tr("<p>The <b>Books</b> example shows how to use Qt SQL classes "
|
|
"with a model/view framework."));
|
|
}
|