dialog.cpp Example File | Qt Serial Port 5.6

Qt 5.6 | Qt Serial Port | Blocking Master Example | dialog.cpp Example File

Qt 5.6.2 Reference Documentation

# dialog.cpp Example File

blockingmaster/dialog.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
      ** Contact: http://www.qt.io/licensing/
      **
      ** 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
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      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see http://www.qt.io/terms-conditions. For further
      ** information use the contact form at http://www.qt.io/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
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      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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      ** As a special exception, The Qt Company gives you certain additional
      ** rights. These rights are described in The Qt Company LGPL Exception
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      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #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, &QPushButton::clicked, this, &Dialog::transaction);
          connect(&thread, &MasterThread::response, this, &Dialog::showResponse);
          connect(&thread, &MasterThread::error, this, &Dialog::processError);
          connect(&thread, &MasterThread::timeout, this, &Dialog::processTimeout);
      }

      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);
      }