Mercurial > hg > svcore
view data/model/TabularModel.h @ 1648:86bbccb79c9b single-point
Switch to a single external set of commands for modifying editables with events
author | Chris Cannam |
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date | Fri, 15 Mar 2019 10:57:35 +0000 |
parents | 7a23dfe65d66 |
children | 343ef2a866a4 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2008 QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef SV_TABULAR_MODEL_H #define SV_TABULAR_MODEL_H #include <QVariant> #include <QString> #include "base/RealTime.h" class Command; /** * TabularModel is an abstract base class for models that support * direct access to data in a tabular form. A model that implements * TabularModel may be displayed and, perhaps, edited in a data * spreadsheet window. * * This is very like a cut-down QAbstractItemModel. It assumes a * relationship between row number and frame time. */ class TabularModel { public: virtual ~TabularModel() { } virtual int getRowCount() const = 0; virtual int getColumnCount() const = 0; virtual QString getHeading(int column) const = 0; enum { SortRole = Qt::UserRole }; enum SortType { SortNumeric, SortAlphabetical }; virtual QVariant getData(int row, int column, int role) const = 0; virtual bool isColumnTimeValue(int col) const = 0; virtual SortType getSortType(int col) const = 0; virtual sv_frame_t getFrameForRow(int row) const = 0; virtual int getRowForFrame(sv_frame_t frame) const = 0; virtual bool isEditable() const { return false; } virtual Command *getSetDataCommand(int /* row */, int /* column */, const QVariant &, int /* role */) { return 0; } virtual Command *getInsertRowCommand(int /* beforeRow */) { return 0; } virtual Command *getRemoveRowCommand(int /* row */) { return 0; } QVariant adaptFrameForRole(sv_frame_t frame, sv_samplerate_t rate, int role) const { if (role == SortRole) return int(frame); RealTime rt = RealTime::frame2RealTime(frame, rate); if (role == Qt::EditRole) return rt.toString().c_str(); else return rt.toText().c_str(); } QVariant adaptValueForRole(float value, QString unit, int role) const { if (role == SortRole || role == Qt::EditRole) return value; else return QString("%1 %2").arg(value).arg(unit); } }; #endif