comparison layer/PaintAssistant.h @ 195:4a3bdde1ef13

* beginnings of spectrum scales

+/* -*- 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 2006-2007 Chris Cannam and 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 _PAINT_ASSISTANT_H_
+#define _PAINT_ASSISTANT_H_
+
+#include <QRect>
+#include <vector>
+
+class QPainter;
+
+class PaintAssistant
+{
+public:
+    enum Scale { LinearScale, MeterScale, dBScale };
+
+    static void paintVerticalLevelScale(QPainter &p, QRect rect,
+                                        float minVal, float maxVal,
+                                        Scale scale,
+                                        std::vector<int> *markCoordRtns = 0);
+
+    static int getYForValue(Scale scale, float value,
+                            float minVal, float maxVal,
+                            int minY, int height);
+};
+
+#endif