writeregistermodel.cpp Example File

modbus/master/writeregistermodel.cpp
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#include "writeregistermodel.h" enum { NumColumn = 0, CoilsColumn = 1, HoldingColumn = 2, ColumnCount = 3, RowCount = 10 }; WriteRegisterModel::WriteRegisterModel(QObject *parent) : QAbstractTableModel(parent), m_coils(RowCount, false), m_holdingRegisters(RowCount, 0u) { } int WriteRegisterModel::rowCount(const QModelIndex &/*parent*/) const { return RowCount; } int WriteRegisterModel::columnCount(const QModelIndex &/*parent*/) const { return ColumnCount; } QVariant WriteRegisterModel::data(const QModelIndex &index, int role) const { if (!index.isValid() || index.row() >= RowCount || index.column() >= ColumnCount) return QVariant(); Q_ASSERT(m_coils.count() == RowCount); Q_ASSERT(m_holdingRegisters.count() == RowCount); if (index.column() == NumColumn && role == Qt::DisplayRole) return QString::number(index.row()); if (index.column() == CoilsColumn && role == Qt::CheckStateRole) // coils return m_coils.at(index.row()) ? Qt::Checked : Qt::Unchecked; else if (index.column() == HoldingColumn && role == Qt::DisplayRole) //holding registers return QString("0x%1").arg(QString::number(m_holdingRegisters.at(index.row()), 16)); return QVariant(); } QVariant WriteRegisterModel::headerData(int section, Qt::Orientation orientation, int role) const { if (role != Qt::DisplayRole) return QVariant(); if (orientation == Qt::Horizontal) { switch (section) { case NumColumn: return QStringLiteral("#"); case CoilsColumn: return QStringLiteral("Coils "); case HoldingColumn: return QStringLiteral("Holding Registers"); default: break; } } return QVariant(); } bool WriteRegisterModel::setData(const QModelIndex &index, const QVariant &value, int role) { if (!index.isValid() || index.row() >= RowCount || index.column() >= ColumnCount) return false; Q_ASSERT(m_coils.count() == RowCount); Q_ASSERT(m_holdingRegisters.count() == RowCount); if (index.column() == CoilsColumn && role == Qt::CheckStateRole) { // coils auto s = static_cast<Qt::CheckState>(value.toUInt()); s == Qt::Checked ? m_coils.setBit(index.row()) : m_coils.clearBit(index.row()); emit dataChanged(index, index); return true; } if (index.column() == HoldingColumn && role == Qt::EditRole) { // holding registers bool result = false; quint16 newValue = value.toString().toUShort(&result, 16); if (result) m_holdingRegisters[index.row()] = newValue; emit dataChanged(index, index); return result; } return false; } Qt::ItemFlags WriteRegisterModel::flags(const QModelIndex &index) const { if (!index.isValid() || index.row() >= RowCount || index.column() >= ColumnCount) return QAbstractTableModel::flags(index); Qt::ItemFlags flags = QAbstractTableModel::flags(index); if ((index.row() < m_address) || (index.row() >= (m_address + m_number))) flags &= ~Qt::ItemIsEnabled; if (index.column() == CoilsColumn) //coils return flags | Qt::ItemIsUserCheckable; if (index.column() == HoldingColumn) //holding registers return flags | Qt::ItemIsEditable; return flags; } void WriteRegisterModel::setStartAddress(int address) { m_address = address; emit updateViewport(); } void WriteRegisterModel::setNumberOfValues(const QString &number) { m_number = number.toInt(); emit updateViewport(); }

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