view widgets/IconLoader.h @ 1127:9fb8dfd7ce4c spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release. There is a new protocol for this. Formerly the threshold parameter had a range from -50dB to 0 with the default at -50, and -50 treated internally as "no threshold". However, there was a hardcoded, hidden internal threshold for spectrogram colour mapping at -80dB with anything below this being rounded to zero. Now the threshold parameter has range -81 to -1 with the default at -80, -81 is treated internally as "no threshold", and there is no hidden internal threshold. So the default behaviour is the same as before, an effective -80dB threshold, but it is now possible to change this in both directions. Sessions reloaded from prior versions may look slightly different because, if the session says there should be no threshold, there will now actually be no threshold instead of having the hidden internal one. Still need to do something in the UI to make it apparent that the -81dB setting removes the threshold entirely. This is at least no worse than the previous, also obscured, magic -50dB setting.
author Chris Cannam
date Mon, 01 Aug 2016 16:21:01 +0100
parents 4b5efd76a55c
children a34a2a25907c
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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 2007 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 _ICON_LOADER_H_
#define _ICON_LOADER_H_

#include <QIcon>

class IconLoader
{
public:
    IconLoader() { }
    virtual ~IconLoader() { }

    QIcon load(QString name);

private:
    bool shouldInvert() const;
    bool shouldAutoInvert(QString) const;
    QPixmap loadPixmap(QString, int);
    QPixmap loadScalable(QString, int);
    QPixmap invertPixmap(QPixmap);
    QString makeScalableFilename(QString, bool);
    QString makeNonScalableFilename(QString, int, bool);
};

#endif