addressbook.cpp Example File
tutorials/addressbook/part2/addressbook.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, 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 Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtGui>
 #include "addressbook.h"

 AddressBook::AddressBook(QWidget *parent)
     : QWidget(parent)
 {
     QLabel *nameLabel = new QLabel(tr("Name:"));
     nameLine = new QLineEdit;
     nameLine->setReadOnly(true);
     QLabel *addressLabel = new QLabel(tr("Address:"));
     addressText = new QTextEdit;
     addressText->setReadOnly(true);

     addButton = new QPushButton(tr("&Add"));
     addButton->show();
     submitButton = new QPushButton(tr("&Submit"));
     submitButton->hide();
     cancelButton = new QPushButton(tr("&Cancel"));
     cancelButton->hide();
     connect(addButton, SIGNAL(clicked()), this, SLOT(addContact()));
     connect(submitButton, SIGNAL(clicked()), this, SLOT(submitContact()));
     connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancel()));
     QVBoxLayout *buttonLayout1 = new QVBoxLayout;
     buttonLayout1->addWidget(addButton, Qt::AlignTop);
     buttonLayout1->addWidget(submitButton);
     buttonLayout1->addWidget(cancelButton);
     buttonLayout1->addStretch();
     QGridLayout *mainLayout = new QGridLayout;
     mainLayout->addWidget(nameLabel, 0, 0);
     mainLayout->addWidget(nameLine, 0, 1);
     mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
     mainLayout->addWidget(addressText, 1, 1);
     mainLayout->addLayout(buttonLayout1, 1, 2);
     setLayout(mainLayout);
     setWindowTitle(tr("Simple Address Book"));
 }
 void AddressBook::addContact()
 {
     oldName = nameLine->text();
     oldAddress = addressText->toPlainText();

     nameLine->clear();
     addressText->clear();

     nameLine->setReadOnly(false);
     nameLine->setFocus(Qt::OtherFocusReason);
     addressText->setReadOnly(false);

     addButton->setEnabled(false);
     submitButton->show();
     cancelButton->show();
 }

 void AddressBook::submitContact()
 {
     QString name = nameLine->text();
     QString address = addressText->toPlainText();

     if (name == "" || address == "") {
         QMessageBox::information(this, tr("Empty Field"),
             tr("Please enter a name and address."));
         return;
     }
     if (!contacts.contains(name)) {
         contacts.insert(name, address);
         QMessageBox::information(this, tr("Add Successful"),
             tr("\"%1\" has been added to your address book.").arg(name));
     } else {
         QMessageBox::information(this, tr("Add Unsuccessful"),
             tr("Sorry, \"%1\" is already in your address book.").arg(name));
         return;
     }
     if (contacts.isEmpty()) {
         nameLine->clear();
         addressText->clear();
     }

     nameLine->setReadOnly(true);
     addressText->setReadOnly(true);
     addButton->setEnabled(true);
     submitButton->hide();
     cancelButton->hide();
 }
 void AddressBook::cancel()
 {
     nameLine->setText(oldName);
     nameLine->setReadOnly(true);

     addressText->setText(oldAddress);
     addressText->setReadOnly(true);

     addButton->setEnabled(true);
     submitButton->hide();
     cancelButton->hide();
 }