TreeModel.cpp

#include<TreeItem.h>
#include <TreeModel.h>
#include <QStringList>

////! [0]
TreeModel::TreeModel(QObject *parent)
	: QAbstractItemModel(parent)
{
	QList<QVariant> rootData;
	rootData << "Сущности";
	rootItem = new TreeItem(rootData);

	const QStringList lines = createLines();
	setupModelData(lines, rootItem);
}
////! [0]

//! [1]
TreeModel::~TreeModel()
{
	delete rootItem;
}

void TreeModel::update()
{
	delete rootItem;
	QList<QVariant> rootData;
	rootData << "Сущности";
	rootItem = new TreeItem(rootData);


	const QStringList lines = createLines();
	setupModelData(lines, rootItem);
}
//! [1]

//! [2]
int TreeModel::columnCount(const QModelIndex &parent) const
{
	if (parent.isValid())
		return static_cast<TreeItem*>(parent.internalPointer())->columnCount();
	else
		return rootItem->columnCount();
}
//! [2]

//! [3]
QVariant TreeModel::data(const QModelIndex &index, int role) const
{
	if (!index.isValid())
		return QVariant();

	if (role != Qt::DisplayRole)
		return QVariant();

	TreeItem *item = static_cast<TreeItem*>(index.internalPointer());

	return item->data(index.column());
}
//! [3]

//! [4]
Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
{
	if (!index.isValid())
		return 0;

	return QAbstractItemModel::flags(index);
}
//! [4]

//! [5]
QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
							   int role) const
{
	if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
		return rootItem->data(section);

	return QVariant();
}
//! [5]

//! [6]
QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent)
			const
{
	if (!hasIndex(row, column, parent))
		return QModelIndex();

	TreeItem *parentItem;

	if (!parent.isValid())
		parentItem = rootItem;
	else
		parentItem = static_cast<TreeItem*>(parent.internalPointer());

	TreeItem *childItem = parentItem->child(row);
	if (childItem)
		return createIndex(row, column, childItem);
	else
		return QModelIndex();
}
//! [6]

//! [7]
QModelIndex TreeModel::parent(const QModelIndex &index) const
{
	if (!index.isValid())
		return QModelIndex();

	TreeItem *childItem = static_cast<TreeItem*>(index.internalPointer());
	TreeItem *parentItem = childItem->parentItem();

	if (parentItem == rootItem)
		return QModelIndex();

	return createIndex(parentItem->row(), 0, parentItem);
}
//! [7]

//! [8]
int TreeModel::rowCount(const QModelIndex &parent) const
{
	TreeItem *parentItem;
	if (parent.column() > 0)
		return 0;

	if (!parent.isValid())
		parentItem = rootItem;
	else
		parentItem = static_cast<TreeItem*>(parent.internalPointer());

	return parentItem->childCount();
}
//! [8]

void TreeModel::setupModelData(const QStringList &lines,TreeItem *parent)
{
	QList<TreeItem*> parents;
	QList<int> indentations;
	parents << parent;
	indentations << 0;

	int number = 0;

	while (number < lines.count()) {
		int position = 0;
		while (position < lines[number].length()) {
			if (lines[number].at(position) != ' ')
				break;
			position++;
		}

		QString lineData = lines[number].mid(position).trimmed();

		if (!lineData.isEmpty()) {
			// Read the column data from the rest of the line.
			QStringList columnStrings = lineData.split("\t", QString::SkipEmptyParts);
			QList<QVariant> columnData;
			for (int column = 0; column < columnStrings.count(); ++column)
				columnData << columnStrings[column];

			if (position > indentations.last()) {
				// The last child of the current parent is now the new parent
				// unless the current parent has no children.

				if (parents.last()->childCount() > 0) {
					parents << parents.last()->child(parents.last()->childCount()-1);
					indentations << position;
				}
			} else {
				while (position < indentations.last() && parents.count() > 0) {
					parents.pop_back();
					indentations.pop_back();
				}
			}

			// Append a new item to the current parent's list of children.
			parents.last()->appendChild(new TreeItem(columnData, parents.last()));
		}

		++number;
	}


	foreach (QString e, DataController::getInstance()->getEssences())
	{
		EREssenceData * data = DataController::getInstance()->search(e);
		QString name = data->getId();
		QString type = Support::typeToString(data->getType());
		QList<QString> keys = data->getKeys();
		QList<QString> attrs = data->getAttributes();
		QList<QString> adj = DataController::getInstance()->getAjesencyFor(data->getId());

	}
}

QStringList TreeModel::createLines()
{
	QStringList lines;
	QString line;

	foreach (QString name, DataController::getInstance()->getEssences())
	{
		EREssenceData * p = DataController::getInstance()->search(name);

		lines << p->getId();
		lines << " Тип:";
		lines << "  "+Support::typeToString(p->getType());

		lines << " Ключи:";
		foreach (QString key, p->getKeysConst())
		{
			QString stripped = key.right(key.length() - key.lastIndexOf(":") - 1);
			lines << "   "+stripped;
		}
		//lines << line;

		lines << " Атрибуты:";
		foreach (QString attr, p->getAttrsConst())
		{
			QString stripped = attr.right(attr.length() - attr.lastIndexOf(":") - 1);
			lines << "   "+stripped;
		}

		lines << " Смежность:";
		foreach (QString adj, DataController::getInstance()->getAjesencyFor(name))
		{
			lines << "   "+adj;
		}

	}
	return lines;
}