sendframebox.cpp Example File

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#include "sendframebox.h" #include "ui_sendframebox.h" enum { MaxStandardId = 0x7FF, MaxExtendedId = 0x10000000 }; enum { MaxPayload = 8, MaxPayloadFd = 64 }; HexIntegerValidator::HexIntegerValidator(QObject *parent) : QValidator(parent), m_maximum(MaxStandardId) { } QValidator::State HexIntegerValidator::validate(QString &input, int &) const { bool ok; uint value = input.toUInt(&ok, 16); if (!value) return Intermediate; if (!ok || value > m_maximum) return Invalid; return Acceptable; } void HexIntegerValidator::setMaximum(uint maximum) { m_maximum = maximum; } HexStringValidator::HexStringValidator(QObject *parent) : QValidator(parent), m_maxLength(MaxPayload) { } QValidator::State HexStringValidator::validate(QString &input, int &pos) const { const int maxSize = 2 * m_maxLength; const QChar space = QLatin1Char(' '); QString data = input; data.remove(space); if (data.isEmpty()) return Intermediate; // limit maximum size and forbid trailing spaces if ((data.size() > maxSize) || (data.size() == maxSize && input.endsWith(space))) return Invalid; // check if all input is valid const QRegularExpression re(QStringLiteral("^[[:xdigit:]]*$")); if (!re.match(data).hasMatch()) return Invalid; // insert a space after every two hex nibbles const QRegularExpression insertSpace(QStringLiteral("(?:[[:xdigit:]]{2} )*[[:xdigit:]]{3}")); if (insertSpace.match(input).hasMatch()) { input.insert(input.size() - 1, space); pos = input.size(); } return Acceptable; } void HexStringValidator::setMaxLength(int maxLength) { m_maxLength = maxLength; } SendFrameBox::SendFrameBox(QWidget *parent) : QGroupBox(parent), m_ui(new Ui::SendFrameBox) { m_ui->setupUi(this); m_hexIntegerValidator = new HexIntegerValidator(this); m_ui->frameIdEdit->setValidator(m_hexIntegerValidator); m_hexStringValidator = new HexStringValidator(this); m_ui->payloadEdit->setValidator(m_hexStringValidator); connect(m_ui->dataFrame, &QRadioButton::toggled, [this](bool set) { if (set) m_ui->flexibleDataRateBox->setEnabled(true); }); connect(m_ui->remoteFrame, &QRadioButton::toggled, [this](bool set) { if (set) { m_ui->flexibleDataRateBox->setEnabled(false); m_ui->flexibleDataRateBox->setChecked(false); } }); connect(m_ui->errorFrame, &QRadioButton::toggled, [this](bool set) { if (set) { m_ui->flexibleDataRateBox->setEnabled(false); m_ui->flexibleDataRateBox->setChecked(false); } }); connect(m_ui->extendedFormatBox, &QCheckBox::toggled, [this](bool set) { m_hexIntegerValidator->setMaximum(set ? MaxExtendedId : MaxStandardId); }); connect(m_ui->flexibleDataRateBox, &QCheckBox::toggled, [this](bool set) { m_hexStringValidator->setMaxLength(set ? MaxPayloadFd : MaxPayload); m_ui->bitrateSwitchBox->setEnabled(set); if (!set) m_ui->bitrateSwitchBox->setChecked(false); }); auto frameIdTextChanged = [this]() { const bool hasFrameId = !m_ui->frameIdEdit->text().isEmpty(); m_ui->sendButton->setEnabled(hasFrameId); m_ui->sendButton->setToolTip(hasFrameId ? QString() : tr("Cannot send because no Frame ID was given.")); }; connect(m_ui->frameIdEdit, &QLineEdit::textChanged, frameIdTextChanged); frameIdTextChanged(); connect(m_ui->sendButton, &QPushButton::clicked, [this]() { const uint frameId = m_ui->frameIdEdit->text().toUInt(nullptr, 16); QString data = m_ui->payloadEdit->text(); const QByteArray payload = QByteArray::fromHex(data.remove(QLatin1Char(' ')).toLatin1()); QCanBusFrame frame = QCanBusFrame(frameId, payload); frame.setExtendedFrameFormat(m_ui->extendedFormatBox->isChecked()); frame.setFlexibleDataRateFormat(m_ui->flexibleDataRateBox->isChecked()); frame.setBitrateSwitch(m_ui->bitrateSwitchBox->isChecked()); if (m_ui->errorFrame->isChecked()) frame.setFrameType(QCanBusFrame::ErrorFrame); else if (m_ui->remoteFrame->isChecked()) frame.setFrameType(QCanBusFrame::RemoteRequestFrame); emit sendFrame(frame); }); } SendFrameBox::~SendFrameBox() { delete m_ui; }

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