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/*

    treeitem.cpp

    A container for items of data supplied by the simple tree model.

*/

#include <QStringList>

#include "treeitem.h"

//! [0]

TreeItem::TreeItem(const QVector<QVariant> &data, TreeItem *parent)

{

    parentItem = parent;

    itemData = data;

}

//! [0]

//! [1]

TreeItem::~TreeItem()

{

    qDeleteAll(childItems);

}

//! [1]

//! [2]

TreeItem *TreeItem::child(int number)

{

    return childItems.value(number);

}

//! [2]

//! [3]

int TreeItem::childCount() const

{

    return childItems.count();

}

//! [3]

//! [4]

int TreeItem::childNumber() const

{

    if (parentItem)

        return parentItem->childItems.indexOf(const_cast<TreeItem*>(this));

    return 0;

}

//! [4]

//! [5]

int TreeItem::columnCount() const

{

    return itemData.count();

}

//! [5]

//! [6]

QVariant TreeItem::data(int column) const

{

    return itemData.value(column);

}

//! [6]

//! [7]

bool TreeItem::insertChildren(int position, int count, int columns)

{

    if (position < 0 || position > childItems.size())

        return false;

    for (int row = 0; row < count; ++row) {

        QVector<QVariant> data(columns);

        TreeItem *item = new TreeItem(data, this);

        childItems.insert(position, item);

    }

    return true;

}

//! [7]

//! [8]

bool TreeItem::insertColumns(int position, int columns)

{

    if (position < 0 || position > itemData.size())

        return false;

    for (int column = 0; column < columns; ++column)

        itemData.insert(position, QVariant());

    foreach (TreeItem *child, childItems)

        child->insertColumns(position, columns);

    return true;

}

//! [8]

//! [9]

TreeItem *TreeItem::parent()

{

    return parentItem;

}

//! [9]

//! [10]

bool TreeItem::removeChildren(int position, int count)

{

    if (position < 0 || position + count > childItems.size())

        return false;

    for (int row = 0; row < count; ++row)

        delete childItems.takeAt(position);

    return true;

}

//! [10]

bool TreeItem::removeColumns(int position, int columns)

{

    if (position < 0 || position + columns > itemData.size())

        return false;

    for (int column = 0; column < columns; ++column)

        itemData.remove(position);

    foreach (TreeItem *child, childItems)

        child->removeColumns(position, columns);

    return true;

}

//! [11]

bool TreeItem::setData(int column, const QVariant &value)

{

    if (column < 0 || column >= itemData.size())

        return false;

    itemData[column] = value;

    return true;

}

//! [11]