dialog.cpp Example File | Qt Serial Port 5.4

- Qt 5.4
- Qt Serial Port
- Blocking Master Example
- dialog.cpp Example File
- Qt 5.4.2 Reference Documentation

# dialog.cpp Example File

blockingmaster/dialog.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the QtSerialPort module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** 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 Digia. For licensing terms and
    ** conditions see http://qt.digia.com/licensing. For further information
    ** use the contact form at http://qt.digia.com/contact-us.
    **
    ** 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 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** In addition, as a special exception, Digia gives you certain additional
    ** rights. These rights are described in the Digia Qt LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #include "dialog.h"

    #include <QLabel>
    #include <QLineEdit>
    #include <QComboBox>
    #include <QSpinBox>
    #include <QPushButton>
    #include <QGridLayout>

    #include <QtSerialPort/QSerialPortInfo>

    QT_USE_NAMESPACE

    Dialog::Dialog(QWidget *parent)
        : QDialog(parent)
        , transactionCount(0)
        , serialPortLabel(new QLabel(tr("Serial port:")))
        , serialPortComboBox(new QComboBox())
        , waitResponseLabel(new QLabel(tr("Wait response, msec:")))
        , waitResponseSpinBox(new QSpinBox())
        , requestLabel(new QLabel(tr("Request:")))
        , requestLineEdit(new QLineEdit(tr("Who are you?")))
        , trafficLabel(new QLabel(tr("No traffic.")))
        , statusLabel(new QLabel(tr("Status: Not running.")))
        , runButton(new QPushButton(tr("Start")))
    {
        foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
            serialPortComboBox->addItem(info.portName());

        waitResponseSpinBox->setRange(0, 10000);
        waitResponseSpinBox->setValue(1000);

        QGridLayout *mainLayout = new QGridLayout;
        mainLayout->addWidget(serialPortLabel, 0, 0);
        mainLayout->addWidget(serialPortComboBox, 0, 1);
        mainLayout->addWidget(waitResponseLabel, 1, 0);
        mainLayout->addWidget(waitResponseSpinBox, 1, 1);
        mainLayout->addWidget(runButton, 0, 2, 2, 1);
        mainLayout->addWidget(requestLabel, 2, 0);
        mainLayout->addWidget(requestLineEdit, 2, 1, 1, 3);
        mainLayout->addWidget(trafficLabel, 3, 0, 1, 4);
        mainLayout->addWidget(statusLabel, 4, 0, 1, 5);
        setLayout(mainLayout);

        setWindowTitle(tr("Blocking Master"));
        serialPortComboBox->setFocus();

        connect(runButton, SIGNAL(clicked()),
                this, SLOT(transaction()));
        connect(&thread, SIGNAL(response(QString)),
                this, SLOT(showResponse(QString)));
        connect(&thread, SIGNAL(error(QString)),
                this, SLOT(processError(QString)));
        connect(&thread, SIGNAL(timeout(QString)),
                this, SLOT(processTimeout(QString)));
    }

    void Dialog::transaction()
    {
        setControlsEnabled(false);
        statusLabel->setText(tr("Status: Running, connected to port %1.")
                             .arg(serialPortComboBox->currentText()));
        thread.transaction(serialPortComboBox->currentText(),
                           waitResponseSpinBox->value(),
                           requestLineEdit->text());
    }

    void Dialog::showResponse(const QString &s)
    {
        setControlsEnabled(true);
        trafficLabel->setText(tr("Traffic, transaction #%1:"
                                 "\n\r-request: %2"
                                 "\n\r-response: %3")
                              .arg(++transactionCount).arg(requestLineEdit->text()).arg(s));
    }

    void Dialog::processError(const QString &s)
    {
        setControlsEnabled(true);
        statusLabel->setText(tr("Status: Not running, %1.").arg(s));
        trafficLabel->setText(tr("No traffic."));
    }

    void Dialog::processTimeout(const QString &s)
    {
        setControlsEnabled(true);
        statusLabel->setText(tr("Status: Running, %1.").arg(s));
        trafficLabel->setText(tr("No traffic."));
    }

    void Dialog::setControlsEnabled(bool enable)
    {
        runButton->setEnabled(enable);
        serialPortComboBox->setEnabled(enable);
        waitResponseSpinBox->setEnabled(enable);
        requestLineEdit->setEnabled(enable);
    }