comparison data/model/TabularModel.h @ 420:50a956688baa

* reorganise tabular data editor model support

+/* -*- 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 _TABULAR_MODEL_H_
+#define _TABULAR_MODEL_H_
+
+#include <QVariant>
+#include <QString>
+
+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 int getRowCount() const = 0;
+    virtual int getColumnCount() const = 0;
+
+    virtual QString getHeading(int column) const = 0;
+    virtual QVariant getData(int row, int column, int role) const = 0;
+
+    virtual long getFrameForRow(int row) const = 0;
+    virtual int getRowForFrame(long frame) const = 0;
+
+    virtual bool isColumnTimeValue(int col) const = 0;
+
+    virtual bool isEditable() const { return false; }
+    virtual Command *setData(int row, int column, const QVariant &, int role)
+    { return 0; }
+};
+
+#endif