connectdialog.cpp Example File | Qt Serial Bus 5.6

Qt Documentation (Technology Preview) | Qt Serial Bus | CAN Bus example | connectdialog.cpp Example File

Qt 5.6.2 Reference Documentation

# connectdialog.cpp Example File

can/connectdialog.cpp

      /****************************************************************************
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      ** This file is part of the examples of the QtSerialBus module.
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      #include "connectdialog.h"
      #include "ui_connectdialog.h"

      #include <QCanBus>
      #include <QDebug>

      ConnectDialog::ConnectDialog(QWidget *parent) :
          QDialog(parent),
          m_ui(new Ui::ConnectDialog),
          m_customSpeedValidator(0)
      {
          m_ui->setupUi(this);

          m_customSpeedValidator = new QIntValidator(0, 1000000, this);
          m_ui->errorFilterEdit->setValidator(new QIntValidator(0, 0x1FFFFFFFU, this));

          m_ui->loopbackBox->addItem(tr("unspecified"), QVariant());
          m_ui->loopbackBox->addItem(tr("false"), QVariant(false));
          m_ui->loopbackBox->addItem(tr("true"), QVariant(true));

          m_ui->receiveOwnBox->addItem(tr("unspecified"), QVariant());
          m_ui->receiveOwnBox->addItem(tr("false"), QVariant(false));
          m_ui->receiveOwnBox->addItem(tr("true"), QVariant(true));

          m_ui->canFdBox->addItem(tr("false"), QVariant(false));
          m_ui->canFdBox->addItem(tr("true"), QVariant(true));

          connect(m_ui->okButton, &QPushButton::clicked, this, &ConnectDialog::ok);
          connect(m_ui->cancelButton, &QPushButton::clicked, this, &ConnectDialog::cancel);
          connect(m_ui->useConfigurationBox, &QCheckBox::clicked, m_ui->configurationBox, &QGroupBox::setEnabled);

          connect(m_ui->speedBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
                  this, &ConnectDialog::checkCustomSpeedPolicy);
          connect(m_ui->backendListBox, &QComboBox::currentTextChanged,
                  this, &ConnectDialog::backendChanged);
          m_ui->rawFilterEdit->hide();
          m_ui->rawFilterLabel->hide();

          fillBackends();
          fillSpeeds();

          updateSettings();
      }

      ConnectDialog::~ConnectDialog()
      {
          delete m_ui;
      }

      ConnectDialog::Settings ConnectDialog::settings() const
      {
          return m_currentSettings;
      }

      void ConnectDialog::checkCustomSpeedPolicy(int idx)
      {
          const bool isCustomSpeed = !m_ui->speedBox->itemData(idx).isValid();
          m_ui->speedBox->setEditable(isCustomSpeed);
          if (isCustomSpeed) {
              m_ui->speedBox->clearEditText();
              QLineEdit *edit = m_ui->speedBox->lineEdit();
              edit->setValidator(m_customSpeedValidator);
          }
      }

      void ConnectDialog::backendChanged(const QString &backend)
      {
          if (backend == QStringLiteral("generic"))
              m_ui->interfaceNameEdit->setPlaceholderText(QStringLiteral("can0"));
          else if (backend == QStringLiteral("peakcan"))
              m_ui->interfaceNameEdit->setPlaceholderText(QStringLiteral("usbbus1"));
          else if (backend == QStringLiteral("socketcan"))
              m_ui->interfaceNameEdit->setPlaceholderText(QStringLiteral("can0"));
          else if (backend == QStringLiteral("tinycan"))
              m_ui->interfaceNameEdit->setPlaceholderText(QStringLiteral("channela"));
      }

      void ConnectDialog::ok()
      {
          updateSettings();
          accept();
      }

      void ConnectDialog::cancel()
      {
          revertSettings();
          reject();
      }

      QString ConnectDialog::configurationValue(QCanBusDevice::ConfigurationKey key)
      {
          QVariant result;

          foreach (const ConfigurationItem &item, m_currentSettings.configurations) {
              if (item.first == key) {
                  result = item.second;
                  break;
              }
          }

          if (result.isNull() && (
                      key == QCanBusDevice::LoopbackKey ||
                      key == QCanBusDevice::ReceiveOwnKey)) {
              return tr("unspecified");
          }

          return result.toString();
      }

      void ConnectDialog::revertSettings()
      {
          m_ui->backendListBox->setCurrentText(m_currentSettings.backendName);
          m_ui->interfaceNameEdit->setText(m_currentSettings.deviceInterfaceName);
          m_ui->useConfigurationBox->setChecked(m_currentSettings.useConfigurationEnabled);

          QString value = configurationValue(QCanBusDevice::LoopbackKey);
          m_ui->loopbackBox->setCurrentText(value);

          value = configurationValue(QCanBusDevice::ReceiveOwnKey);
          m_ui->receiveOwnBox->setCurrentText(value);

          value = configurationValue(QCanBusDevice::ErrorFilterKey);
          m_ui->errorFilterEdit->setText(value);

          value = configurationValue(QCanBusDevice::BitRateKey);
          m_ui->speedBox->setCurrentText(value);

          value = configurationValue(QCanBusDevice::CanFdKey);
          m_ui->canFdBox->setCurrentText(value);
      }

      void ConnectDialog::updateSettings()
      {
          m_currentSettings.backendName = m_ui->backendListBox->currentText();
          m_currentSettings.deviceInterfaceName = m_ui->interfaceNameEdit->text();
          m_currentSettings.useConfigurationEnabled = m_ui->useConfigurationBox->isChecked();

          if (m_currentSettings.useConfigurationEnabled) {
              m_currentSettings.configurations.clear();
              // process LoopBack
              if (m_ui->loopbackBox->currentIndex() != 0) {
                  ConfigurationItem item;
                  item.first = QCanBusDevice::LoopbackKey;
                  item.second = m_ui->loopbackBox->currentData();
                  m_currentSettings.configurations.append(item);
              }

              // process ReceiveOwnKey
              if (m_ui->receiveOwnBox->currentIndex() != 0) {
                  ConfigurationItem item;
                  item.first = QCanBusDevice::ReceiveOwnKey;
                  item.second = m_ui->receiveOwnBox->currentData();
                  m_currentSettings.configurations.append(item);
              }

              // process error filter
              if (!m_ui->errorFilterEdit->text().isEmpty()) {
                  QString value = m_ui->errorFilterEdit->text();
                  bool ok = false;
                  int dec = value.toInt(&ok);
                  if (ok) {
                      ConfigurationItem item;
                      item.first = QCanBusDevice::ErrorFilterKey;
                      item.second = QVariant::fromValue(QCanBusFrame::FrameErrors(dec));
                      m_currentSettings.configurations.append(item);
                  }
              }

              // process raw filter list
              if (!m_ui->rawFilterEdit->text().isEmpty()) {
                  //TODO current ui not sfficient to reflect this param
              }

              // process bitrate
              bool ok = false;
              int bitrate = 0;
              if (m_ui->speedBox->currentIndex() == (m_ui->speedBox->count() - 1))
                  bitrate = m_ui->speedBox->currentText().toInt(&ok);
              else
                  bitrate = m_ui->speedBox->itemData(m_ui->speedBox->currentIndex()).toInt(&ok);

              if (ok && (bitrate > 0)) {
                  ConfigurationItem item;
                  item.first = QCanBusDevice::BitRateKey;
                  item.second = QVariant(bitrate);
                  m_currentSettings.configurations.append(item);
              }

              // process CAN FD setting
              ConfigurationItem fdItem;
              fdItem.first = QCanBusDevice::CanFdKey;
              fdItem.second = m_ui->canFdBox->currentData();
              m_currentSettings.configurations.append(fdItem);
          }
      }

      void ConnectDialog::fillBackends()
      {
          foreach (const QByteArray &backend, QCanBus::instance()->plugins())
              m_ui->backendListBox->addItem(backend);
      }

      void ConnectDialog::fillSpeeds()
      {
          m_ui->speedBox->addItem(QStringLiteral("10000"), 10000);
          m_ui->speedBox->addItem(QStringLiteral("20000"), 20000);
          m_ui->speedBox->addItem(QStringLiteral("50000"), 50000);
          m_ui->speedBox->addItem(QStringLiteral("100000"), 100000);
          m_ui->speedBox->addItem(QStringLiteral("125000"), 125000);
          m_ui->speedBox->addItem(QStringLiteral("250000"), 250000);
          m_ui->speedBox->addItem(QStringLiteral("500000"), 500000);
          m_ui->speedBox->addItem(QStringLiteral("800000"), 800000);
          m_ui->speedBox->addItem(QStringLiteral("1000000"), 1000000);
          m_ui->speedBox->addItem(tr("Custom"));

          m_ui->speedBox->setCurrentIndex(6); // setup 500000 bits/sec by default
      }