array2d.h

#ifndef TBQ_CONTAINER_ARRAY2D_H
#define TBQ_CONTAINER_ARRAY2D_H
 
#include <QSize>
#include <QVector>
 
/*****************************/
/* Namespace instructions    */
/*****************************/
 
namespace tbq
{
 
/*****************************/
/* Define template interface */
/*****************************/
 
template <typename T>
class Array2D
{
public:
    Array2D();
    explicit Array2D(size_t nbRows, size_t nbCols);
 
public:
    size_t getRows() const;
    size_t getCols() const;
    size_t getNbElements() const;
    QSize getSize() const;
 
public:
    void clear();
    void resize(size_t nbRows, size_t nbCols);
 
    void insert(size_t row, size_t col, const T &value);
 
public:
    T& operator()(size_t row, size_t col);
    const T& operator()(size_t row, size_t col) const;
 
public: // Friends operator defined using "Making new friends" idiom (https://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Making_New_Friends)
    friend bool operator==(const Array2D<T> &left, const Array2D<T> &right)
    {
        return left.m_rows == right.m_rows
            && left.m_cols == right.m_cols
            && left.m_data == right.m_data;
    }
 
    friend bool operator!=(const Array2D<T> &left, const Array2D<T> &right)
    {
        return !(left == right);
    }
 
private:
    size_t m_rows;
    size_t m_cols;
    QVector<T> m_data;
};
 
/*****************************/
/* Define template
 *      implementation       */
/*****************************/
 
template<typename T>
Array2D<T>::Array2D(size_t nbRows, size_t nbCols)
{
    resize(nbRows, nbCols);
}
 
template<typename T>
Array2D<T>::Array2D()
    : m_rows(0), m_cols(0)
{
    /* Nothing to do */
}
 
template<typename T>
size_t Array2D<T>::getRows() const
{
    return m_rows;
}
 
template<typename T>
size_t Array2D<T>::getCols() const
{
    return m_cols;
}
 
template<typename T>
size_t Array2D<T>::getNbElements() const
{
    return m_rows * m_cols;
}
 
template<typename T>
QSize Array2D<T>::getSize() const
{
    return QSize(m_cols, m_rows);
}
 
template<typename T>
void Array2D<T>::clear()
{
    m_rows = 0;
    m_cols = 0;
    m_data.clear();
}
 
template<typename T>
void Array2D<T>::resize(size_t nbRows, size_t nbCols)
{
    m_rows = nbRows;
    m_cols = nbCols;
    m_data.resize(m_rows * m_cols);
}
 
template<typename T>
void Array2D<T>::insert(size_t row, size_t col, const T &value)
{
    (*this)(row, col) = value;
}
 
template<typename T>
T& Array2D<T>::operator()(size_t row, size_t col)
{
    return m_data[row * m_cols + col];
}
 
template<typename T>
const T& Array2D<T>::operator()(size_t row, size_t col) const
{
    return m_data[row * m_cols + col];
}
 
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/* Qt specific methods       */
/*****************************/
 
/*****************************/
/* End namespaces            */
/*****************************/
 
} // namespace tbq
 
/*****************************/
/* Qt specific meta-system   */
/*****************************/
 
#endif // TBQ_CONTAINER_ARRAY2D_H