svgui  1.9
PaintAssistant.h
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00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
00002 
00003 /*
00004     Sonic Visualiser
00005     An audio file viewer and annotation editor.
00006     Centre for Digital Music, Queen Mary, University of London.
00007     This file copyright 2006-2007 Chris Cannam and QMUL.
00008    
00009     This program is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU General Public License as
00011     published by the Free Software Foundation; either version 2 of the
00012     License, or (at your option) any later version.  See the file
00013     COPYING included with this distribution for more information.
00014 */
00015 
00016 #ifndef _PAINT_ASSISTANT_H_
00017 #define _PAINT_ASSISTANT_H_
00018 
00019 #include <QRect>
00020 #include <vector>
00021 
00022 class QPainter;
00023 
00024 class PaintAssistant
00025 {
00026 public:
00027     enum Scale { LinearScale, MeterScale, dBScale };
00028 
00029     static void paintVerticalLevelScale(QPainter &p, QRect rect,
00030                                         float minVal, float maxVal,
00031                                         Scale scale, int &multRtn,
00032                                         std::vector<int> *markCoordRtns = 0);
00033 
00034     static int getYForValue(Scale scale, float value,
00035                             float minVal, float maxVal,
00036                             int minY, int height);
00037 };
00038 
00039 #endif