qt5base-lts/examples/sql/sqlwidgetmapper/window.cpp
Jani Heikkinen cd46a2daf5 Unify license header usage.
Update files using old header.LGPL3 to header.LGPL
Update files using old FDL template to use new one
Update files using old BSD template to use new one

Change-Id: I36a78272516f9953d02956522f285b40adfc8915
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
2016-03-29 10:20:03 +00:00

169 lines
6.6 KiB
C++

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/
#include <QtWidgets>
#include <QtSql>
#include "window.h"
//! [Set up widgets]
Window::Window(QWidget *parent)
: QWidget(parent)
{
setupModel();
nameLabel = new QLabel(tr("Na&me:"));
nameEdit = new QLineEdit();
addressLabel = new QLabel(tr("&Address:"));
addressEdit = new QTextEdit();
typeLabel = new QLabel(tr("&Type:"));
typeComboBox = new QComboBox();
nextButton = new QPushButton(tr("&Next"));
previousButton = new QPushButton(tr("&Previous"));
nameLabel->setBuddy(nameEdit);
addressLabel->setBuddy(addressEdit);
typeLabel->setBuddy(typeComboBox);
//! [Set up widgets]
//! [Set up the mapper]
QSqlTableModel *relModel = model->relationModel(typeIndex);
typeComboBox->setModel(relModel);
typeComboBox->setModelColumn(relModel->fieldIndex("description"));
mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(nameEdit, model->fieldIndex("name"));
mapper->addMapping(addressEdit, model->fieldIndex("address"));
mapper->addMapping(typeComboBox, typeIndex);
//! [Set up the mapper]
//! [Set up connections and layouts]
connect(previousButton, SIGNAL(clicked()),
mapper, SLOT(toPrevious()));
connect(nextButton, SIGNAL(clicked()),
mapper, SLOT(toNext()));
connect(mapper, SIGNAL(currentIndexChanged(int)),
this, SLOT(updateButtons(int)));
QGridLayout *layout = new QGridLayout();
layout->addWidget(nameLabel, 0, 0, 1, 1);
layout->addWidget(nameEdit, 0, 1, 1, 1);
layout->addWidget(previousButton, 0, 2, 1, 1);
layout->addWidget(addressLabel, 1, 0, 1, 1);
layout->addWidget(addressEdit, 1, 1, 2, 1);
layout->addWidget(nextButton, 1, 2, 1, 1);
layout->addWidget(typeLabel, 3, 0, 1, 1);
layout->addWidget(typeComboBox, 3, 1, 1, 1);
setLayout(layout);
setWindowTitle(tr("SQL Widget Mapper"));
mapper->toFirst();
}
//! [Set up connections and layouts]
//! [Set up the main table]
void Window::setupModel()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName(":memory:");
if (!db.open()) {
QMessageBox::critical(0, tr("Cannot open database"),
tr("Unable to establish a database connection.\n"
"This example needs SQLite support. Please read "
"the Qt SQL driver documentation for information how "
"to build it."), QMessageBox::Cancel);
return;
}
QSqlQuery query;
query.exec("create table person (id int primary key, "
"name varchar(20), address varchar(200), typeid int)");
query.exec("insert into person values(1, 'Alice', "
"'<qt>123 Main Street<br/>Market Town</qt>', 101)");
query.exec("insert into person values(2, 'Bob', "
"'<qt>PO Box 32<br/>Mail Handling Service"
"<br/>Service City</qt>', 102)");
query.exec("insert into person values(3, 'Carol', "
"'<qt>The Lighthouse<br/>Remote Island</qt>', 103)");
query.exec("insert into person values(4, 'Donald', "
"'<qt>47338 Park Avenue<br/>Big City</qt>', 101)");
query.exec("insert into person values(5, 'Emma', "
"'<qt>Research Station<br/>Base Camp<br/>"
"Big Mountain</qt>', 103)");
//! [Set up the main table]
//! [Set up the address type table]
query.exec("create table addresstype (id int, description varchar(20))");
query.exec("insert into addresstype values(101, 'Home')");
query.exec("insert into addresstype values(102, 'Work')");
query.exec("insert into addresstype values(103, 'Other')");
model = new QSqlRelationalTableModel(this);
model->setTable("person");
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
typeIndex = model->fieldIndex("typeid");
model->setRelation(typeIndex,
QSqlRelation("addresstype", "id", "description"));
model->select();
}
//! [Set up the address type table]
//! [Slot for updating the buttons]
void Window::updateButtons(int row)
{
previousButton->setEnabled(row > 0);
nextButton->setEnabled(row < model->rowCount() - 1);
}
//! [Slot for updating the buttons]