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#include <QtDebug>

#include "TestContainer.h"

#include "TreeModel.h"

using namespace QPatternistSDK;

TreeModel::TreeModel(const QStringList columnData,

                     QObject *p) : QAbstractItemModel(p),

                                   m_root(0),

                                   m_columnData(columnData)

{

}

TreeModel::~TreeModel()

{

}

QVariant TreeModel::data(const QModelIndex &idx, int role) const

{

    if(!idx.isValid())

        return QVariant();

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

    Q_ASSERT(item);

    return item->data(static_cast<Qt::ItemDataRole>(role), idx.column());

}

QVariant TreeModel::headerData(int section, Qt::Orientation orientation, int role) const

{

    if(orientation == Qt::Horizontal && role == Qt::DisplayRole)

        return m_columnData.value(section);

    return QVariant();

}

void TreeModel::childChanged(TreeItem *item)

{

    if (item) {

        const QModelIndex index = createIndex(item->row(), 0, item);

        dataChanged(index, index);

    } else {

        layoutChanged();

    }

}

QModelIndex TreeModel::index(int row, int column, const QModelIndex &p) const

{

    const int c = columnCount(p);

    if(row < 0 || column < 0 || column >= c)

        return QModelIndex();

    TreeItem *parentItem;

    if(p.isValid())

        parentItem = static_cast<TreeItem *>(p.internalPointer());

    else

        parentItem = m_root;

    if(!parentItem)

        return QModelIndex();

    TreeItem *childItem = parentItem->child(row);

    if(childItem)

        return createIndex(row, column, childItem);

    else

        return QModelIndex();

}

QModelIndex TreeModel::parent(const QModelIndex &idx) const

{

    if(!idx.isValid())

        return QModelIndex();

    TreeItem *childItem = static_cast<TreeItem *>(idx.internalPointer());

    Q_ASSERT(childItem);

    TreeItem *parentItem = childItem->parent();

    if(!parentItem || parentItem == m_root)

        return QModelIndex();

    Q_ASSERT(parentItem);

    return createIndex(parentItem->row(), 0, parentItem);

}

Qt::ItemFlags TreeModel::flags(const QModelIndex &idx) const

{

    /* Not sure about this code. */

    if(!idx.isValid())

        return Qt::ItemFlags();

    return Qt::ItemIsEnabled | Qt::ItemIsSelectable;

}

int TreeModel::rowCount(const QModelIndex &p) const

{

    if(p.column() > 0)

        return 0;

    const TreeItem *parentItem;

    if(p.isValid())

        parentItem = static_cast<TreeItem *>(p.internalPointer());

    else

    {

        if(m_root)

            parentItem = m_root;

        else

            return 0;

    }

    return parentItem->childCount();

}

int TreeModel::columnCount(const QModelIndex &p) const

{

    if(p.isValid())

        return static_cast<TreeItem *>(p.internalPointer())->columnCount();

    else

        return m_columnData.count();

}

TreeItem *TreeModel::root() const

{

    return m_root;

}

void TreeModel::setRoot(TreeItem *r)

{

    TreeItem *const oldRoot = m_root;

    m_root = r;

    if(m_root)

        connect(r, SIGNAL(changed(TreeItem *)), SLOT(childChanged(TreeItem *)));

    reset(); /* Notify views that we have radically changed. */

    delete oldRoot;

}

// vim: et:ts=4:sw=4:sts=4