dialog.cpp Example File | Qt Serial Port 5.6

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

Qt 5.6.2 Reference Documentation

# dialog.cpp Example File

blockingslave/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
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      ** accordance with the commercial license agreement provided with the
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      **
      ** 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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      ****************************************************************************/

      #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())
          , waitRequestLabel(new QLabel(tr("Wait request, msec:")))
          , waitRequestSpinBox(new QSpinBox())
          , responseLabel(new QLabel(tr("Response:")))
          , responseLineEdit(new QLineEdit(tr("Hello, I'm Slave.")))
          , trafficLabel(new QLabel(tr("No traffic.")))
          , statusLabel(new QLabel(tr("Status: Not running.")))
          , runButton(new QPushButton(tr("Start")))
      {
          waitRequestSpinBox->setRange(0, 10000);
          waitRequestSpinBox->setValue(10000);

          foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
              serialPortComboBox->addItem(info.portName());

          QGridLayout *mainLayout = new QGridLayout;
          mainLayout->addWidget(serialPortLabel, 0, 0);
          mainLayout->addWidget(serialPortComboBox, 0, 1);
          mainLayout->addWidget(waitRequestLabel, 1, 0);
          mainLayout->addWidget(waitRequestSpinBox, 1, 1);
          mainLayout->addWidget(runButton, 0, 2, 2, 1);
          mainLayout->addWidget(responseLabel, 2, 0);
          mainLayout->addWidget(responseLineEdit, 2, 1, 1, 3);
          mainLayout->addWidget(trafficLabel, 3, 0, 1, 4);
          mainLayout->addWidget(statusLabel, 4, 0, 1, 5);
          setLayout(mainLayout);

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

          connect(runButton, &QPushButton::clicked, this, &Dialog::startSlave);
          connect(&thread, &SlaveThread::request, this,&Dialog::showRequest);
          connect(&thread, &SlaveThread::error, this, &Dialog::processError);
          connect(&thread, &SlaveThread::timeout, this, &Dialog::processTimeout);

          connect(serialPortComboBox, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
                  this, &Dialog::activateRunButton);
          connect(waitRequestSpinBox, static_cast<void (QSpinBox::*)(const QString &)>(&QSpinBox::valueChanged),
                  this, &Dialog::activateRunButton);
          connect(responseLineEdit, &QLineEdit::textChanged, this, &Dialog::activateRunButton);
      }

      void Dialog::startSlave()
      {
          runButton->setEnabled(false);
          statusLabel->setText(tr("Status: Running, connected to port %1.")
                               .arg(serialPortComboBox->currentText()));
          thread.startSlave(serialPortComboBox->currentText(),
                            waitRequestSpinBox->value(),
                            responseLineEdit->text());
      }

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

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

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