OSCAR-code/3rdparty/qtserialport/examples/serialport/master/dialog.cpp

/****************************************************************************
**
** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
** Contact: http://www.qt-project.org/legal
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** This file is part of the QtSerialPort module of the Qt Toolkit.
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** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
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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())
    , 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(100);

    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("Master"));
    serialPortComboBox->setFocus();

    timer.setSingleShot(true);

    connect(runButton, SIGNAL(clicked()),
            this, SLOT(sendRequest()));
    connect(&serial, SIGNAL(readyRead()),
            this, SLOT(readResponse()));
    connect(&timer, SIGNAL(timeout()),
            this, SLOT(processTimeout()));
}

void Dialog::sendRequest()
{
    if (serial.portName() != serialPortComboBox->currentText()) {
        serial.close();
        serial.setPortName(serialPortComboBox->currentText());

        if (!serial.open(QIODevice::ReadWrite)) {
            processError(tr("Can't open %1, error code %2")
                         .arg(serial.portName()).arg(serial.error()));
            return;
        }
    }

    setControlsEnabled(false);
    statusLabel->setText(tr("Status: Running, connected to port %1.")
                         .arg(serialPortComboBox->currentText()));

    serial.write(requestLineEdit->text().toLocal8Bit());
    timer.start(waitResponseSpinBox->value());
}

void Dialog::readResponse()
{
    response.append(serial.readAll());
}

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

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

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