WSJT-X/FrequencyList.hpp

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#ifndef FREQUENCY_LIST_HPP__
#define FREQUENCY_LIST_HPP__
#include "pimpl_h.hpp"
#include <QList>
#include <QSortFilterProxyModel>
#include "Radio.hpp"
#include "Modes.hpp"
class Bands;
//
// Class FrequencyList
//
// Encapsulates a collection of frequencies with associated modes.
// The implementation is a table containing the list of Frequency and
// mode tuples which are editable. A third column is modeled in the
// model which is an immutable double representation of the
// corresponding Frequency item scaled to mega-Hertz.
//
// The list is ordered. A filter on mode is available and is set by
// the filter(Mode) method. The Mode value Modes::NULL_MODE passes
// all rows in the filter.
//
// Responsibilities
//
// Stores internally a list of unique frequency mode tuples.
// Provides methods to add and delete list elements. Provides range
// iterators for a filtered view of the underlying table.
//
// Collaborations
//
// Implements the QSortFilterProxyModel interface for a list of spot
// frequencies.
//
class FrequencyList final
: public QSortFilterProxyModel
{
Q_OBJECT;
public:
using Frequency = Radio::Frequency;
using Mode = Modes::Mode;
struct Item
{
Frequency frequency_;
Mode mode_;
};
using FrequencyItems = QList<Item>;
using BandSet = QSet<QString>;
enum Column {mode_column, frequency_column, frequency_mhz_column};
// an iterator that meets the requirements of the C++ for range statement
class const_iterator
{
public:
const_iterator (FrequencyList const * parent, int row)
: parent_ {parent}
, row_ {row}
{
}
Item const& operator * () const;
Item const * operator -> () const;
bool operator != (const_iterator const&) const;
bool operator == (const_iterator const&) const;
const_iterator& operator ++ ();
private:
FrequencyList const * parent_;
int row_;
};
explicit FrequencyList (Bands const *, QObject * parent = nullptr);
~FrequencyList ();
// Load and store underlying items
FrequencyItems frequency_list (FrequencyItems);
FrequencyItems const& frequency_list () const;
// Iterators for the sorted and filtered items
//
// Note that these iterators are on the final sorted and filtered
// rows, if you need to access the underlying unfiltered and
// unsorted frequencies then use the frequency_list() member to
// access the underlying list of rows.
const_iterator begin () const;
const_iterator end () const;
// Find a row with a given frequency
const_iterator find (Frequency) const;
// Bands of the frequencies
BandSet all_bands (Mode = Modes::NULL_MODE) const;
BandSet filtered_bands () const;
// Find the row of the nearest best working frequency given a
// frequency. Returns -1 if no suitable working frequency is found
// in the list.
int best_working_frequency (Frequency) const;
// Find the row of the nearest best working frequency given a band
// name. Returns -1 if no suitable working frequency is found in the
// list.
int best_working_frequency (QString const& band) const;
// Set filter
Q_SLOT void filter (Mode);
// Reset
Q_SLOT void reset_to_defaults ();
// Model API
QModelIndex add (Item);
bool remove (Item);
bool removeDisjointRows (QModelIndexList);
// Proxy API
bool filterAcceptsRow (int source_row, QModelIndex const& parent) const override;
// Custom roles.
static int constexpr SortRole = Qt::UserRole;
private:
class impl;
pimpl<impl> m_;
};
inline
bool operator == (FrequencyList::Item const& lhs, FrequencyList::Item const& rhs)
{
return
lhs.frequency_ == rhs.frequency_
&& lhs.mode_ == rhs.mode_;
}
QDataStream& operator << (QDataStream&, FrequencyList::Item const&);
QDataStream& operator >> (QDataStream&, FrequencyList::Item&);
#if !defined (QT_NO_DEBUG_STREAM)
QDebug operator << (QDebug, FrequencyList::Item const&);
#endif
Q_DECLARE_METATYPE (FrequencyList::Item);
Q_DECLARE_METATYPE (FrequencyList::FrequencyItems);
#endif