MassOfDataTest/DataModel.cpp at master · Carval197/MassOfDataTest · GitHub

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#include "DataModel.h"
#include <QAbstractItemModel>
#include "DataEntry.h"
#include <QDateTime>

DataModel::DataModel(QObject* parent)
	: QAbstractTableModel(parent)
{}

DataModel::~DataModel()
{}

int DataModel::rowCount(const QModelIndex & parent) const
{
    return m_datas.size();
}


bool DataModel::insertRows(int row, int count, const QModelIndex& parent)
{
	beginInsertRows(parent, row, row + count - 1);
	endInsertRows();
	return true;
}

bool DataModel::removeRows(int row, int count, const QModelIndex& parent)
{
	beginRemoveRows(parent, row, row + count - 1);
	endRemoveRows();
	return true;
}

void DataModel::beginInsertRows(const QModelIndex& parent, int first, int last)
{
	QAbstractTableModel::beginInsertRows(parent, first, last);
}

void DataModel::endInsertRows()
{
	QAbstractTableModel::endInsertRows();
}

int DataModel::columnCount(const QModelIndex& parent) const
{
	return 3;
}


QVariant DataModel::data(const QModelIndex& index, int role) const
{
	if (!index.isValid() || role != Qt::DisplayRole) {
		return QVariant();
	}

	const DataEntry& entry = m_datas.at(index.row());

	switch (index.column())
	{
	case 0: return entry.getId();
	case 1:
	 return QDateTime::fromMSecsSinceEpoch(entry.getTime()).toString("yyyy-MM-dd hh:mm:ss.zzz");

	case 2: return entry.getValue();
	default: return QVariant();
	}
}

void DataModel::addData(DataEntry dataEntry)
{
	beginInsertRows(QModelIndex(), rowCount(), rowCount());
	m_datas.append(dataEntry);
	endInsertRows();
}

QVariant DataModel::headerData(int section, Qt::Orientation orientation, int role) const
{
	//complete function,header include three column that id, time,value
	if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
	{
		switch (section)
		{
		case 0: return "ID";
		case 1: return "Time";
		case 2: return "Value";
		default: return QVariant();
		}
	}


	return QVariant();

}

void DataModel::clear()
{
	if (rowCount() == 0)
	{
		return;
	}

	beginRemoveRows(QModelIndex(), 0, rowCount() - 1);

	m_datas.clear();

	endRemoveRows();
}

void DataModel::addDatas(const QList<DataEntry>& dataEntries)
{
	if (dataEntries.isEmpty()) {
		return; // 如果列表为空，直接返回
	}

	// 开始插入行
	beginInsertRows(QModelIndex(), rowCount(), rowCount() + dataEntries.size() - 1);

	// 批量添加数据
	for (const DataEntry& entry : dataEntries) {
		m_datas.append(entry); // 将每个条目添加到 m_datas
	}

	// 结束插入行
	endInsertRows();
}