addresswidget.cpp Example File | Qt Widgets 5.12.12

- Qt 5.12
- Qt Widgets
- Address Book Example
- addresswidget.cpp Example File
- Qt 5.12.12 Reference Documentation

# addresswidget.cpp Example File

itemviews/addressbook/addresswidget.cpp

     /****************************************************************************
     **
     ** 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();
     }