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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2008 QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #ifndef _TABULAR_MODEL_H_
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17 #define _TABULAR_MODEL_H_
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18
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19 #include <QVariant>
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20 #include <QString>
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21
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22 class Command;
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23
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24 /**
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25 * TabularModel is an abstract base class for models that support
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26 * direct access to data in a tabular form. A model that implements
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27 * TabularModel may be displayed and, perhaps, edited in a data
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28 * spreadsheet window.
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29 *
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30 * This is very like a cut-down QAbstractItemModel. It assumes a
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31 * relationship between row number and frame time.
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32 */
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33
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34 class TabularModel
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35 {
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36 public:
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37 virtual ~TabularModel() { }
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38
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39 virtual int getRowCount() const = 0;
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40 virtual int getColumnCount() const = 0;
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41
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42 virtual QString getHeading(int column) const = 0;
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43
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44 enum { SortRole = Qt::UserRole };
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45 enum SortType { SortNumeric, SortAlphabetical };
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46
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47 virtual QVariant getData(int row, int column, int role) const = 0;
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48 virtual bool isColumnTimeValue(int col) const = 0;
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49 virtual SortType getSortType(int col) const = 0;
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50
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51 virtual long getFrameForRow(int row) const = 0;
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52 virtual int getRowForFrame(long frame) const = 0;
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53
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54 virtual bool isEditable() const { return false; }
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55 virtual Command *getSetDataCommand(int /* row */, int /* column */, const QVariant &, int /* role */) { return 0; }
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56 virtual Command *getInsertRowCommand(int /* beforeRow */) { return 0; }
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57 virtual Command *getRemoveRowCommand(int /* row */) { return 0; }
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58 };
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59
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60 #endif
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