view widgets/ColourComboBox.cpp @ 1386:fc3d89f88690 spectrogramparam

Use log-frequency rather than log-bin for calculating x coord in spectrum. This has the advantage that frequency positions don't move when we change the window size or oversampling ratio, but it does give us an unhelpfully large amount of space for very low frequencies - to be considered

/* -*- 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 2007-2016 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 "ColourComboBox.h"

#include "ColourNameDialog.h"

#include "layer/ColourDatabase.h"

#include "base/Debug.h"

#include <QFontMetrics>
#include <QColorDialog>

#include <iostream>

using namespace std;

ColourComboBox::ColourComboBox(bool withAddNewColourEntry, QWidget *parent) :
    NotifyingComboBox(parent),
    m_withAddNewColourEntry(withAddNewColourEntry)
{
    setEditable(false);
    rebuild();

    connect(this, SIGNAL(activated(int)), this, SLOT(comboActivated(int)));
    connect(ColourDatabase::getInstance(), SIGNAL(colourDatabaseChanged()),
            this, SLOT(rebuild()));

    if (count() < 20 && count() > maxVisibleItems()) {
        setMaxVisibleItems(count());
    }
}

void
ColourComboBox::comboActivated(int index)
{
    if (!m_withAddNewColourEntry ||
        index < int(ColourDatabase::getInstance()->getColourCount())) {
        emit colourChanged(index);
        return;
    }
    
    QColor newColour = QColorDialog::getColor();
    if (!newColour.isValid()) return;

    ColourNameDialog dialog(tr("Name New Colour"),
                            tr("Enter a name for the new colour:"),
                            newColour, newColour.name(), this);
    dialog.showDarkBackgroundCheckbox(tr("Prefer black background for this colour"));
    if (dialog.exec() == QDialog::Accepted) {
        //!!! command
        ColourDatabase *db = ColourDatabase::getInstance();
        int index = db->addColour(newColour, dialog.getColourName());
        db->setUseDarkBackground(index, dialog.isDarkBackgroundChecked());
        // addColour will have called back on rebuild(), and the new
        // colour will be at the index previously occupied by Add New
        // Colour, which is our current index
        emit colourChanged(currentIndex());
    }
}

void
ColourComboBox::rebuild()
{
    blockSignals(true);

    int ix = currentIndex();
    
    clear();

    int size = (QFontMetrics(QFont()).height() * 2) / 3;
    if (size < 12) size = 12;
    
    ColourDatabase *db = ColourDatabase::getInstance();
    for (int i = 0; i < db->getColourCount(); ++i) {
        QString name = db->getColourName(i);
        addItem(db->getExamplePixmap(i, QSize(size, size)), name);
    }

    if (m_withAddNewColourEntry) {
        addItem(tr("Add New Colour..."));
    }

    setCurrentIndex(ix);
    
    blockSignals(false);
}