WSJT-X/models/StationList.cpp

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#include "StationList.hpp"
#include <utility>
#include <algorithm>
#include <cmath>
#include <QMetaType>
#include <QAbstractTableModel>
#include <QObject>
#include <QString>
#include <QVector>
#include <QStringList>
#include <QMimeData>
#include <QDataStream>
#include <QByteArray>
#include <QDebug>
#include <QDebugStateSaver>
#include "pimpl_impl.hpp"
#include "Radio.hpp"
#include "Bands.hpp"
#include "FrequencyList.hpp"
#if !defined (QT_NO_DEBUG_STREAM)
QDebug operator << (QDebug debug, StationList::Station const& station)
{
QDebugStateSaver saver {debug};
debug.nospace () << "Station("
<< station.band_name_ << ", "
<< station.offset_ << ", "
<< station.antenna_description_ << ')';
return debug;
}
#endif
QDataStream& operator << (QDataStream& os, StationList::Station const& station)
{
return os << station.band_name_
<< station.offset_
<< station.antenna_description_;
}
QDataStream& operator >> (QDataStream& is, StationList::Station& station)
{
return is >> station.band_name_
>> station.offset_
>> station.antenna_description_;
}
class StationList::impl final
: public QAbstractTableModel
{
public:
impl (Bands const * bands, Stations stations, QObject * parent)
: QAbstractTableModel {parent}
, bands_ {bands}
, stations_ {stations}
{
}
Stations station_list (Stations);
QModelIndex add (Station);
FrequencyDelta offset (Frequency) const;
// Implement the QAbstractTableModel interface.
int rowCount (QModelIndex const& parent = QModelIndex {}) const override;
int columnCount (QModelIndex const& parent = QModelIndex {}) const override;
Qt::ItemFlags flags (QModelIndex const& = QModelIndex {}) const override;
QVariant data (QModelIndex const&, int role) const override;
QVariant headerData (int section, Qt::Orientation, int = Qt::DisplayRole) const override;
bool setData (QModelIndex const&, QVariant const& value, int role = Qt::EditRole) override;
bool removeRows (int row, int count, QModelIndex const& parent = QModelIndex {}) override;
bool insertRows (int row, int count, QModelIndex const& parent = QModelIndex {}) override;
Qt::DropActions supportedDropActions () const override;
QStringList mimeTypes () const override;
QMimeData * mimeData (QModelIndexList const&) const override;
bool dropMimeData (QMimeData const *, Qt::DropAction, int row, int column, QModelIndex const& parent) override;
// Helper method for band validation.
QModelIndex first_matching_band (QString const& band_name) const
{
// find first exact match in bands
auto matches = bands_->match (bands_->index (0, 0)
, Qt::DisplayRole
, band_name
, 1
, Qt::MatchExactly);
return matches.isEmpty () ? QModelIndex {} : matches.first ();
}
static int constexpr num_columns {3};
static auto constexpr mime_type = "application/wsjt.antenna-descriptions";
Bands const * bands_;
Stations stations_;
};
StationList::StationList (Bands const * bands, QObject * parent)
: StationList {bands, {}, parent}
{
}
StationList::StationList (Bands const * bands, Stations stations, QObject * parent)
: QSortFilterProxyModel {parent}
, m_ {bands, stations, parent}
{
setSourceModel (&*m_);
setSortRole (SortRole);
}
StationList::~StationList ()
{
}
auto StationList::station_list (Stations stations) -> Stations
{
return m_->station_list (stations);
}
auto StationList::station_list () const -> Stations const&
{
return m_->stations_;
}
QModelIndex StationList::add (Station s)
{
return mapFromSource (m_->add (s));
}
bool StationList::remove (Station s)
{
auto row = m_->stations_.indexOf (s);
if (0 > row)
{
return false;
}
return removeRow (row);
}
namespace
{
bool row_is_higher (QModelIndex const& lhs, QModelIndex const& rhs)
{
return lhs.row () > rhs.row ();
}
}
bool StationList::removeDisjointRows (QModelIndexList rows)
{
bool result {true};
// We must work with source model indexes because we don't want row
// removes to invalidate model indexes we haven't yet processed. We
// achieve that by processing them in decending row order.
for (int r = 0; r < rows.size (); ++r)
{
rows[r] = mapToSource (rows[r]);
}
// reverse sort by row
qSort (rows.begin (), rows.end (), row_is_higher);
Q_FOREACH (auto index, rows)
{
if (result && !m_->removeRow (index.row ()))
{
result = false;
}
}
return result;
}
auto StationList::offset (Frequency f) const -> FrequencyDelta
{
return m_->offset (f);
}
auto StationList::impl::station_list (Stations stations) -> Stations
{
beginResetModel ();
std::swap (stations_, stations);
endResetModel ();
return stations;
}
QModelIndex StationList::impl::add (Station s)
{
// Any band that isn't in the list may be added
if (!stations_.contains (s))
{
auto row = stations_.size ();
beginInsertRows (QModelIndex {}, row, row);
stations_.append (s);
endInsertRows ();
return index (row, 0);
}
return QModelIndex {};
}
auto StationList::impl::offset (Frequency f) const -> FrequencyDelta
{
// Lookup band for frequency
auto const& band = bands_->find (f);
if (!band.isEmpty ())
{
// Lookup station for band
for (int i = 0; i < stations_.size (); ++i)
{
if (stations_[i].band_name_ == band)
{
return stations_[i].offset_;
}
}
}
return 0; // no offset
}
int StationList::impl::rowCount (QModelIndex const& parent) const
{
return parent.isValid () ? 0 : stations_.size ();
}
int StationList::impl::columnCount (QModelIndex const& parent) const
{
return parent.isValid () ? 0 : num_columns;
}
Qt::ItemFlags StationList::impl::flags (QModelIndex const& index) const
{
auto result = QAbstractTableModel::flags (index);
auto row = index.row ();
auto column = index.column ();
if (index.isValid ()
&& row < stations_.size ()
&& column < num_columns)
{
if (description_column == column)
{
result |= Qt::ItemIsEditable | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
}
else
{
result |= Qt::ItemIsEditable | Qt::ItemIsDropEnabled;
}
}
else
{
result |= Qt::ItemIsDropEnabled;
}
return result;
}
QVariant StationList::impl::data (QModelIndex const& index, int role) const
{
QVariant item;
auto row = index.row ();
auto column = index.column ();
if (index.isValid ()
&& row < stations_.size ())
{
switch (column)
{
case band_column:
switch (role)
{
case SortRole:
{
// Lookup band.
auto band_index = first_matching_band (stations_.at (row).band_name_);
// Use the sort role value of the band.
item = band_index.data (Bands::SortRole);
}
break;
case Qt::DisplayRole:
case Qt::EditRole:
case Qt::AccessibleTextRole:
item = stations_.at (row).band_name_;
break;
case Qt::ToolTipRole:
case Qt::AccessibleDescriptionRole:
item = tr ("Band name");
break;
case Qt::TextAlignmentRole:
item = Qt::AlignHCenter + Qt::AlignVCenter;
break;
}
break;
case offset_column:
{
auto frequency_offset = stations_.at (row).offset_;
switch (role)
{
case SortRole:
case Qt::EditRole:
case Qt::AccessibleTextRole:
item = frequency_offset;
break;
case Qt::DisplayRole:
item = Radio::pretty_frequency_MHz_string (frequency_offset) + " MHz";
break;
case Qt::ToolTipRole:
case Qt::AccessibleDescriptionRole:
item = tr ("Frequency offset");
break;
case Qt::TextAlignmentRole:
item = Qt::AlignRight + Qt::AlignVCenter;
break;
}
}
break;
case description_column:
switch (role)
{
case SortRole:
case Qt::EditRole:
case Qt::DisplayRole:
case Qt::AccessibleTextRole:
item = stations_.at (row).antenna_description_;
break;
case Qt::ToolTipRole:
case Qt::AccessibleDescriptionRole:
item = tr ("Antenna description");
break;
case Qt::TextAlignmentRole:
item = Qt::AlignLeft + Qt::AlignVCenter;
break;
}
break;
}
}
return item;
}
QVariant StationList::impl::headerData (int section, Qt::Orientation orientation, int role) const
{
QVariant header;
if (Qt::DisplayRole == role && Qt::Horizontal == orientation)
{
switch (section)
{
case band_column: header = tr ("Band"); break;
case offset_column: header = tr ("Offset"); break;
case description_column: header = tr ("Antenna Description"); break;
}
}
else
{
header = QAbstractTableModel::headerData (section, orientation, role);
}
return header;
}
bool StationList::impl::setData (QModelIndex const& model_index, QVariant const& value, int role)
{
bool changed {false};
auto row = model_index.row ();
auto size = stations_.size ();
if (model_index.isValid ()
&& Qt::EditRole == role
&& row < size)
{
QVector<int> roles;
roles << role;
switch (model_index.column ())
{
case band_column:
{
// Check if band name is valid.
auto band_index = first_matching_band (value.toString ());
if (band_index.isValid ())
{
stations_[row].band_name_ = band_index.data ().toString ();
Q_EMIT dataChanged (model_index, model_index, roles);
changed = true;
}
}
break;
case offset_column:
{
if (value.canConvert<FrequencyDelta> ())
{
FrequencyDelta offset {qvariant_cast<Radio::FrequencyDelta> (value)};
if (offset != stations_[row].offset_)
{
stations_[row].offset_ = offset;
Q_EMIT dataChanged (model_index, model_index, roles);
changed = true;
}
}
}
break;
case description_column:
stations_[row].antenna_description_ = value.toString ();
Q_EMIT dataChanged (model_index, model_index, roles);
changed = true;
break;
}
}
return changed;
}
bool StationList::impl::removeRows (int row, int count, QModelIndex const& parent)
{
if (0 < count && (row + count) <= rowCount (parent))
{
beginRemoveRows (parent, row, row + count - 1);
for (auto r = 0; r < count; ++r)
{
stations_.removeAt (row);
}
endRemoveRows ();
return true;
}
return false;
}
bool StationList::impl::insertRows (int row, int count, QModelIndex const& parent)
{
if (0 < count)
{
beginInsertRows (parent, row, row + count - 1);
for (auto r = 0; r < count; ++r)
{
stations_.insert (row, Station ());
}
endInsertRows ();
return true;
}
return false;
}
Qt::DropActions StationList::impl::supportedDropActions () const
{
return Qt::CopyAction | Qt::MoveAction;
}
QStringList StationList::impl::mimeTypes () const
{
QStringList types;
types << mime_type;
types << "application/wsjt.Frequencies";
return types;
}
QMimeData * StationList::impl::mimeData (QModelIndexList const& items) const
{
QMimeData * mime_data = new QMimeData {};
QByteArray encoded_data;
QDataStream stream {&encoded_data, QIODevice::WriteOnly};
Q_FOREACH (auto const& item, items)
{
if (item.isValid ())
{
stream << QString {data (item, Qt::DisplayRole).toString ()};
}
}
mime_data->setData (mime_type, encoded_data);
return mime_data;
}
bool StationList::impl::dropMimeData (QMimeData const * data, Qt::DropAction action, int /* row */, int /* column */, QModelIndex const& parent)
{
if (Qt::IgnoreAction == action)
{
return true;
}
if (parent.isValid ()
&& description_column == parent.column ()
&& data->hasFormat (mime_type))
{
QByteArray encoded_data {data->data (mime_type)};
QDataStream stream {&encoded_data, QIODevice::ReadOnly};
auto dest_index = parent;
while (!stream.atEnd ())
{
QString text;
stream >> text;
setData (dest_index, text);
dest_index = index (dest_index.row () + 1, dest_index.column (), QModelIndex {});
}
return true;
}
else if (data->hasFormat ("application/wsjt.Frequencies"))
{
QByteArray encoded_data {data->data ("application/wsjt.Frequencies")};
QDataStream stream {&encoded_data, QIODevice::ReadOnly};
while (!stream.atEnd ())
{
FrequencyList_v2::Item item;
stream >> item;
auto const& band = bands_->find (item.frequency_);
if (stations_.cend () == std::find_if (stations_.cbegin ()
, stations_.cend ()
, [&band] (Station const& s) {return s.band_name_ == band;}))
{
// not found so add it
add (Station {band, 0, QString {}});
}
}
return true;
}
return false;
}