mainwindow.cpp Example File
todos-cpp/mainwindow.cpp/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 <QtWidgets/qframe.h> #include <QtWidgets/qlabel.h> #include <QtWidgets/qlistview.h> #include <QtWidgets/qpushbutton.h> #include <QtWidgets/qtoolbar.h> #include <QtWidgets/qinputdialog.h> #include <QtWidgets/qlayout.h> #include <QtCore/qjsondocument.h> #include <QtCore/qjsonobject.h> #include <Enginio/enginioclient.h> #include <Enginio/enginioreply.h> // To get the backend right, we use a helper class in the example. // Usually one would just insert the backend information below. #include "backendhelper.h" #include "mainwindow.h" #include "todosmodel.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { setWindowTitle(QStringLiteral("Enginio TODO example")); QByteArray EnginioBackendId = backendId("todo"); m_client = new EnginioClient(this); m_client->setBackendId(EnginioBackendId); QObject::connect(m_client, &EnginioClient::error, this, &MainWindow::error); m_model = new TodosModel(this); m_model->setClient(m_client); QJsonObject query; query["objectType"] = QString::fromUtf8("objects.todos"); m_model->setQuery(query); QToolBar *toolBar = new QToolBar(this); m_addNewButton = new QPushButton(toolBar); m_addNewButton->setText("&Add"); QObject::connect(m_addNewButton, &QPushButton::clicked, this, &MainWindow::appendItem); m_removeButton = new QPushButton(toolBar); m_removeButton->setText("&Remove"); m_removeButton->setEnabled(false); QObject::connect(m_removeButton, &QPushButton::clicked, this, &MainWindow::removeItem); m_toggleButton = new QPushButton(toolBar); m_toggleButton->setText("&Toggle Completed"); m_toggleButton->setEnabled(false); QObject::connect(m_toggleButton, &QPushButton::clicked, this, &MainWindow::toggleCompleted); toolBar->addWidget(m_addNewButton); toolBar->addWidget(m_removeButton); toolBar->addWidget(m_toggleButton); m_view = new QTreeView(this); m_view->setAlternatingRowColors(true); QFrame *frame = new QFrame(this); QVBoxLayout *windowLayout = new QVBoxLayout(frame); windowLayout->addWidget(m_view); windowLayout->addWidget(toolBar); setCentralWidget(frame); m_view->setModel(m_model); m_view->setSelectionModel(new QItemSelectionModel(m_model, m_model)); QObject::connect(m_view->selectionModel(), &QItemSelectionModel::selectionChanged, this, &MainWindow::selectionChanged); } QSize MainWindow::sizeHint() const { return QSize(400, 600); } void MainWindow::error(EnginioReply *error) { qWarning() << Q_FUNC_INFO << error; } void MainWindow::removeItem() { QModelIndex index = m_view->currentIndex(); EnginioReply *reply = m_model->remove(index.row()); QObject::connect(reply, &EnginioReply::finished, reply, &EnginioReply::deleteLater); } void MainWindow::appendItem() { bool ok; QString text = QInputDialog::getText(this, tr("Create a new To Do") , tr("Title:"), QLineEdit::Normal , "", &ok); if (ok && !text.isEmpty()){ QJsonObject object; object["title"] = text; object["completed"] = false; // By default a new To Do is not completed EnginioReply *reply = m_model->append(object); QObject::connect(reply, &EnginioReply::finished, reply, &EnginioReply::deleteLater); } } void MainWindow::toggleCompleted() { QModelIndex index = m_view->currentIndex(); bool completed = m_model->data(index, m_model->CompletedRole).toBool(); m_model->setData(index, QVariant(!completed), TodosModel::CompletedRole); } void MainWindow::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected) { Q_UNUSED(deselected); bool value = selected.count(); m_removeButton->setEnabled(value); m_toggleButton->setEnabled(value); }