- Qt 5.5
- Qt Widgets
- Part 2 - Adding Addresses
- addressbook.cpp Example File
- Qt 5.5.1 Reference Documentation

# addressbook.cpp Example File

tutorials/addressbook/part2/addressbook.cpp

    /****************************************************************************
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    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
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    #include <QtWidgets>
    #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.isEmpty() || address.isEmpty()) {
            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();
    }