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f1858dbb4f
Trying to find the sweet spot for completeness, usefulness, safety and, performance from the various custom item models and item delegates. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5474 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
#ifndef BANDS_HPP__
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#define BANDS_HPP__
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#include <QAbstractTableModel>
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#include "Radio.hpp"
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//
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// Class Bands
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//
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// Encapsulates information about amateur radio bands as defined by
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// the ADIF specification. The model is immutable. The rows are
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// stored in asscending order of frequency.
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//
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// Responsibilities
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//
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// Provides a well known band name mapped to lower and upper
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// frequency limits. Also provides a convenience operation to
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// determine the band name for any given frequency, the result of
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// which may be null if the given frequency doesn't lie within a
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// recognised band.
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//
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// Collaborations
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//
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// Implements the QAbstractTableModel interface as an immutable table
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// where rows are bands and columns are band name, lower frequency
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// limit and, upper ferquency limit respectively.
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//
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class Bands final
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: public QAbstractTableModel
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{
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public:
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using Frequency = Radio::Frequency;
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explicit Bands (QObject * parent = nullptr);
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//
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// Model API
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//
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QString find (Frequency) const; // find band Frequency is in
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static QString const& oob ();
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// Custom role for sorting.
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static int constexpr SortRole = Qt::UserRole;
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// Implement the QAbstractTableModel interface
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int rowCount (QModelIndex const& parent = QModelIndex {}) const override;
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int columnCount (QModelIndex const& parent = QModelIndex {}) const override;
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Qt::ItemFlags flags (QModelIndex const& = QModelIndex {}) const override;
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QVariant headerData (int section, Qt::Orientation, int = Qt::DisplayRole) const override;
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// The value return for the Qt::DisplayRole role for the root of the
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// model (invalid index) is a special string representing out of
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// band.
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//
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// All columns return a number for the custom role SortRole, this
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// number defines a strict frequency order for the rows.
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QVariant data (QModelIndex const&, int role = Qt::DisplayRole) const override;
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};
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#endif
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