addresswidget.cpp Example File

 /****************************************************************************
 **
 ** 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
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** 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.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "adddialog.h"
 #include "addresswidget.h"

 #include <QtWidgets>

 AddressWidget::AddressWidget(QWidget *parent)
     : QTabWidget(parent)
 {
     table = new TableModel(this);
     newAddressTab = new NewAddressTab(this);
     connect(newAddressTab, &NewAddressTab::sendDetails,
         this, &AddressWidget::addEntry);

     addTab(newAddressTab, "Address Book");

     setupTabs();
 }

 void AddressWidget::showAddEntryDialog()
 {
     AddDialog aDialog;

     if (aDialog.exec()) {
         QString name = aDialog.nameText->text();
         QString address = aDialog.addressText->toPlainText();

         addEntry(name, address);
     }
 }

 void AddressWidget::addEntry(QString name, QString address)
 {
     if (!table->getContacts().contains({ name, address })) {
         table->insertRows(0, 1, QModelIndex());

         QModelIndex index = table->index(0, 0, QModelIndex());
         table->setData(index, name, Qt::EditRole);
         index = table->index(0, 1, QModelIndex());
         table->setData(index, address, Qt::EditRole);
         removeTab(indexOf(newAddressTab));
     } else {
         QMessageBox::information(this, tr("Duplicate Name"),
             tr("The name \"%1\" already exists.").arg(name));
     }
 }

 void AddressWidget::editEntry()
 {
     QTableView *temp = static_cast<QTableView*>(currentWidget());
     QSortFilterProxyModel *proxy = static_cast<QSortFilterProxyModel*>(temp->model());
     QItemSelectionModel *selectionModel = temp->selectionModel();

     QModelIndexList indexes = selectionModel->selectedRows();
     QString name;
     QString address;
     int row = -1;

     foreach (QModelIndex index, indexes) {
         row = proxy->mapToSource(index).row();
         QModelIndex nameIndex = table->index(row, 0, QModelIndex());
         QVariant varName = table->data(nameIndex, Qt::DisplayRole);
         name = varName.toString();

         QModelIndex addressIndex = table->index(row, 1, QModelIndex());
         QVariant varAddr = table->data(addressIndex, Qt::DisplayRole);
         address = varAddr.toString();
     }

     AddDialog aDialog;
     aDialog.setWindowTitle(tr("Edit a Contact"));

     aDialog.nameText->setReadOnly(true);
     aDialog.nameText->setText(name);
     aDialog.addressText->setText(address);

     if (aDialog.exec()) {
         QString newAddress = aDialog.addressText->toPlainText();
         if (newAddress != address) {
             QModelIndex index = table->index(row, 1, QModelIndex());
             table->setData(index, newAddress, Qt::EditRole);
         }
     }
 }

 void AddressWidget::removeEntry()
 {
     QTableView *temp = static_cast<QTableView*>(currentWidget());
     QSortFilterProxyModel *proxy = static_cast<QSortFilterProxyModel*>(temp->model());
     QItemSelectionModel *selectionModel = temp->selectionModel();

     QModelIndexList indexes = selectionModel->selectedRows();

     foreach (QModelIndex index, indexes) {
         int row = proxy->mapToSource(index).row();
         table->removeRows(row, 1, QModelIndex());
     }

     if (table->rowCount(QModelIndex()) == 0) {
         insertTab(0, newAddressTab, "Address Book");
     }
 }

 void AddressWidget::setupTabs()
 {
     QStringList groups;
     groups << "ABC" << "DEF" << "GHI" << "JKL" << "MNO" << "PQR" << "STU" << "VW" << "XYZ";

     for (int i = 0; i < groups.size(); ++i) {
         QString str = groups.at(i);
         QString regExp = QString("^[%1].*").arg(str);

         proxyModel = new QSortFilterProxyModel(this);
         proxyModel->setSourceModel(table);
         proxyModel->setFilterRegExp(QRegExp(regExp, Qt::CaseInsensitive));
         proxyModel->setFilterKeyColumn(0);

         QTableView *tableView = new QTableView;
         tableView->setModel(proxyModel);

         tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
         tableView->horizontalHeader()->setStretchLastSection(true);
         tableView->verticalHeader()->hide();
         tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
         tableView->setSelectionMode(QAbstractItemView::SingleSelection);

         tableView->setSortingEnabled(true);

         connect(tableView->selectionModel(),
             &QItemSelectionModel::selectionChanged,
             this, &AddressWidget::selectionChanged);

         connect(this, &QTabWidget::currentChanged, this, [this](int tabIndex) {
             auto *tableView = qobject_cast<QTableView *>(widget(tabIndex));
             if (tableView)
                 emit selectionChanged(tableView->selectionModel()->selection());
         });

         addTab(tableView, str);
     }
 }

 void AddressWidget::readFromFile(const QString &fileName)
 {
     QFile file(fileName);

     if (!file.open(QIODevice::ReadOnly)) {
         QMessageBox::information(this, tr("Unable to open file"),
             file.errorString());
         return;
     }

     QList<Contact> contacts;
     QDataStream in(&file);
     in >> contacts;

     if (contacts.isEmpty()) {
         QMessageBox::information(this, tr("No contacts in file"),
                                  tr("The file you are attempting to open contains no contacts."));
     } else {
         for (const auto &contact: qAsConst(contacts))
             addEntry(contact.name, contact.address);
     }
 }

 void AddressWidget::writeToFile(const QString &fileName)
 {
     QFile file(fileName);

     if (!file.open(QIODevice::WriteOnly)) {
         QMessageBox::information(this, tr("Unable to open file"), file.errorString());
         return;
     }

     QDataStream out(&file);
     out << table->getContacts();
 }