Mercurial > hg > svcore
view base/ColourDatabase.cpp @ 335:02d2ad95ea52 spectrogram-cache-rejig
* Get storage advice for each cache in an FFT data server. Allows us to be
more confident about the actual memory situation and cut over from memory
to disc part way through an FFT calculation if necessary. StorageAdviser
is now a bit too optimistic though (it's too keen to allocate large numbers
of small blocks in memory).
author | Chris Cannam |
---|---|
date | Tue, 13 Nov 2007 13:54:10 +0000 |
parents | 9a13687c078b |
children |
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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. */ #include "ColourDatabase.h" #include "XmlExportable.h" #include <QPainter> ColourDatabase ColourDatabase::m_instance; ColourDatabase * ColourDatabase::getInstance() { return &m_instance; } ColourDatabase::ColourDatabase() { } int ColourDatabase::getColourCount() const { return m_colours.size(); } QString ColourDatabase::getColourName(int c) const { if (c < 0 || size_t(c) >= m_colours.size()) return ""; return m_colours[c].name; } QColor ColourDatabase::getColour(int c) const { if (c < 0 || size_t(c) >= m_colours.size()) return Qt::black; return m_colours[c].colour; } QColor ColourDatabase::getColour(QString name) const { for (ColourList::const_iterator i = m_colours.begin(); i != m_colours.end(); ++i) { if (i->name == name) return i->colour; } return Qt::black; } int ColourDatabase::getColourIndex(QString name) const { int index = 0; for (ColourList::const_iterator i = m_colours.begin(); i != m_colours.end(); ++i) { if (i->name == name) return index; ++index; } return -1; } int ColourDatabase::getColourIndex(QColor c) const { int index = 0; for (ColourList::const_iterator i = m_colours.begin(); i != m_colours.end(); ++i) { if (i->colour == c) return index; ++index; } return -1; } bool ColourDatabase::useDarkBackground(int c) const { if (c < 0 || size_t(c) >= m_colours.size()) return false; return m_colours[c].darkbg; } void ColourDatabase::setUseDarkBackground(int c, bool dark) { if (c < 0 || size_t(c) >= m_colours.size()) return; if (m_colours[c].darkbg != dark) { m_colours[c].darkbg = dark; emit colourDatabaseChanged(); } } int ColourDatabase::addColour(QColor c, QString name) { int index = 0; for (ColourList::iterator i = m_colours.begin(); i != m_colours.end(); ++i) { if (i->name == name) { i->colour = c; return index; } ++index; } ColourRec rec; rec.colour = c; rec.name = name; rec.darkbg = false; m_colours.push_back(rec); emit colourDatabaseChanged(); return index; } void ColourDatabase::removeColour(QString name) { for (ColourList::iterator i = m_colours.begin(); i != m_colours.end(); ++i) { if (i->name == name) { m_colours.erase(i); return; } } } void ColourDatabase::getStringValues(int index, QString &colourName, QString &colourSpec, QString &darkbg) const { colourName = ""; colourSpec = ""; if (index < 0 || size_t(index) >= m_colours.size()) return; colourName = getColourName(index); colourSpec = XmlExportable::encodeColour(getColour(index)); darkbg = useDarkBackground(index) ? "true" : "false"; } int ColourDatabase::putStringValues(QString colourName, QString colourSpec, QString darkbg) { int index = -1; if (colourSpec != "") { QColor colour(colourSpec); index = getColourIndex(colour); if (index < 0) { index = addColour(colour, colourName == "" ? colourSpec : colourName); } } else if (colourName != "") { index = getColourIndex(colourName); } if (index >= 0) { setUseDarkBackground(index, darkbg == "true"); } return index; } void ColourDatabase::getColourPropertyRange(int *min, int *max) const { ColourDatabase *db = getInstance(); if (min) *min = 0; if (max) { *max = 0; if (db->getColourCount() > 0) *max = db->getColourCount()-1; } } QPixmap ColourDatabase::getExamplePixmap(int index, QSize size) const { QPixmap pmap(size); pmap.fill(useDarkBackground(index) ? Qt::black : Qt::white); QPainter paint(&pmap); QColor colour(getColour(index)); paint.setPen(colour); paint.setBrush(colour); int margin = 2; if (size.width() < 4 || size.height() < 4) margin = 0; else if (size.width() < 8 || size.height() < 8) margin = 1; paint.drawRect(margin, margin, size.width() - margin*2 - 1, size.height() - margin*2 - 1); return pmap; }