modeliterator.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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 * DEALINGS IN THE SOFTWARE.
 **********************************************************************/
 
#include "modeliterator.h"
#include <QAbstractItemModel>
#include <QtDebug>
 
namespace LC
{
namespace Util
{
    ModelIterator::ModelIterator (QAbstractItemModel *model,
            int row, int col, ModelIterator::Direction dir, const QModelIndex& parent)
    : Model_ (model)
    , Parent_ (parent)
    , Row_ (row)
    , Col_ (col)
    , Dir_ (dir)
    {
    }
 
    ModelIterator& ModelIterator::operator++ ()
    {
        ++GetIncrementable ();
        return *this;
    }
 
    ModelIterator ModelIterator::operator++ (int)
    {
        ModelIterator oldThis (*this);
        ++GetIncrementable ();
        return oldThis;
    }
 
    ModelIterator& ModelIterator::operator-- ()
    {
        --GetIncrementable ();
        return *this;
    }
 
    ModelIterator ModelIterator::operator-- (int)
    {
        ModelIterator oldThis (*this);
        --GetIncrementable ();
        return oldThis;
    }
 
    ModelIterator& ModelIterator::operator+= (int diff)
    {
        GetIncrementable () += diff;
        return *this;
    }
 
    ModelIterator& ModelIterator::operator-= (int diff)
    {
        GetIncrementable () -= diff;
        return *this;
    }
 
    int ModelIterator::operator- (const ModelIterator& other) const
    {
        return GetIncrementable () - other.GetIncrementable ();
    }
 
    bool operator== (const ModelIterator& left, const ModelIterator& right)
    {
        return left.Row_ == right.Row_ &&
                left.Col_ == right.Col_ &&
                left.Model_ == right.Model_ &&
                left.Parent_ == right.Parent_;
    }
 
    bool operator!= (const ModelIterator& left, const ModelIterator& right)
    {
        return !(left == right);
    }
 
    QModelIndex ModelIterator::operator*() const
    {
        return Model_->index (Row_, Col_, Parent_);
    }
 
    int ModelIterator::GetRow () const
    {
        return Row_;
    }
 
    int ModelIterator::GetCol () const
    {
        return Col_;
    }
 
    int& ModelIterator::GetIncrementable ()
    {
        switch (Dir_)
        {
        case Direction::Rows:
            return Row_;
        case Direction::Cols:
            return Col_;
        }
 
        qWarning () << Q_FUNC_INFO
                << "unknown direction";
        return Row_;
    }
 
    int ModelIterator::GetIncrementable () const
    {
        switch (Dir_)
        {
        case Direction::Rows:
            return Row_;
        case Direction::Cols:
            return Col_;
        }
 
        qWarning () << Q_FUNC_INFO
                << "unknown direction";
        return Row_;
    }
}
}