view layer/SingleColourLayer.cpp @ 349:369a197737c7

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 "SingleColourLayer.h"
#include "base/ColourDatabase.h"
#include "view/View.h"

#include <iostream>

#include <QTextStream>
#include <QApplication>

SingleColourLayer::ColourRefCount 
SingleColourLayer::m_colourRefCount;

SingleColourLayer::SingleColourLayer() :
    m_colour(0),
    m_colourExplicitlySet(false)
{
    setDefaultColourFor(0);
}

QPixmap
SingleColourLayer::getLayerPresentationPixmap(QSize size) const
{
    return ColourDatabase::getInstance()->getExamplePixmap(m_colour, size);
}

bool
SingleColourLayer::hasLightBackground() const
{
    bool dark = ColourDatabase::getInstance()->useDarkBackground(m_colour);
    return !dark;
}

Layer::PropertyList
SingleColourLayer::getProperties() const
{
    PropertyList list = Layer::getProperties();
    list.push_back("Colour");
    return list;
}

QString
SingleColourLayer::getPropertyLabel(const PropertyName &name) const
{
    if (name == "Colour") return tr("Colour");
    return "";
}

Layer::PropertyType
SingleColourLayer::getPropertyType(const PropertyName &name) const
{
    if (name == "Colour") return ColourProperty;
    return InvalidProperty;
}

QString
SingleColourLayer::getPropertyGroupName(const PropertyName &) const
{
    return QString();
}

int
SingleColourLayer::getPropertyRangeAndValue(const PropertyName &name,
                                        int *min, int *max, int *deflt) const
{
    int val = 0;

    int garbage0, garbage1, garbage2;
    if (!min) min = &garbage0;
    if (!max) max = &garbage1;
    if (!deflt) deflt = &garbage2;

    if (name == "Colour") {

        ColourDatabase::getInstance()->getColourPropertyRange(min, max);
        *deflt = 0; //!!!

        val = m_colour;

    } else {
	val = Layer::getPropertyRangeAndValue(name, min, max, deflt);
    }

    return val;
}

QString
SingleColourLayer::getPropertyValueLabel(const PropertyName &name,
				    int value) const
{
    if (name == "Colour") {
        return Layer::getPropertyValueLabel(name, value);
    }
    return tr("<unknown>");
}

RangeMapper *
SingleColourLayer::getNewPropertyRangeMapper(const PropertyName &) const
{
    return 0;
}

void
SingleColourLayer::setProperty(const PropertyName &name, int value)
{
    if (name == "Colour") {
        setBaseColour(value);
    }
}

void
SingleColourLayer::setDefaultColourFor(View *v)
{
    if (m_colourExplicitlySet) return;

    bool dark = false;
    if (v) {
        dark = !v->hasLightBackground();
    } else {
        QColor bg = QApplication::palette().color(QPalette::Window);
        if (bg.red() + bg.green() + bg.blue() < 384) dark = true;
    }

    ColourDatabase *cdb = ColourDatabase::getInstance();

    int hint = -1;
    bool impose = false;
    if (v) {
        if (m_colourRefCount.find(m_colour) != m_colourRefCount.end() &&
            m_colourRefCount[m_colour] > 0) {
            m_colourRefCount[m_colour]--;
        }
        // We don't want to call this if !v because that probably
        // means we're being called from the constructor, and this is
        // a virtual function
        hint = getDefaultColourHint(dark, impose);
//        std::cerr << "hint = " << hint << ", impose = " << impose << std::endl;
    } else {
//        std::cerr << "(from ctor)" << std::endl;
    }

    if (hint >= 0 && impose) {
        setBaseColour(hint);
        return;
    }

    int bestCount = 0, bestColour = -1;
    
    for (int i = 0; i < cdb->getColourCount(); ++i) {

        int index = i;
        if (hint > 0) index = (index + hint) % cdb->getColourCount();
        if (cdb->useDarkBackground(index) != dark) continue;

        int count = 0;
        if (m_colourRefCount.find(index) != m_colourRefCount.end()) {
            count = m_colourRefCount[index];
        }

//        std::cerr << "index = " << index << ", count = " << count;

        if (bestColour < 0 || count < bestCount) {
            bestColour = index;
            bestCount = count;
//            std::cerr << " *";
        }

//        std::cerr << std::endl;
    }
    
    if (bestColour < 0) m_colour = 0;
    else m_colour = bestColour;

    if (m_colourRefCount.find(m_colour) == m_colourRefCount.end()) {
        m_colourRefCount[m_colour] = 1;
    } else {
        m_colourRefCount[m_colour]++;
    }
}

void
SingleColourLayer::setBaseColour(int colour)
{
    m_colourExplicitlySet = true;

    if (m_colour == colour) return;

    if (m_colourRefCount.find(m_colour) != m_colourRefCount.end() &&
        m_colourRefCount[m_colour] > 0) {
        m_colourRefCount[m_colour]--;
    }

    m_colour = colour;

    if (m_colourRefCount.find(m_colour) == m_colourRefCount.end()) {
        m_colourRefCount[m_colour] = 1;
    } else {
        m_colourRefCount[m_colour]++;
    }

    flagBaseColourChanged();
    emit layerParametersChanged();
}

int
SingleColourLayer::getBaseColour() const
{
    return m_colour;
}

QColor
SingleColourLayer::getBaseQColor() const
{
    return ColourDatabase::getInstance()->getColour(m_colour);
}

QColor
SingleColourLayer::getBackgroundQColor(View *v) const
{
    return v->getBackground();
}

QColor
SingleColourLayer::getForegroundQColor(View *v) const
{
    return v->getForeground();
}

std::vector<QColor>
SingleColourLayer::getPartialShades(View *v) const
{
    std::vector<QColor> s;
    QColor base = getBaseQColor();
    QColor bg = getBackgroundQColor(v);
    for (int i = 0; i < 3; ++i) {
        int red = base.red() + ((bg.red() - base.red()) * (i + 1)) / 4;
        int green = base.green() + ((bg.green() - base.green()) * (i + 1)) / 4;
        int blue = base.blue() + ((bg.blue() - base.blue()) * (i + 1)) / 4;
        s.push_back(QColor(red, green, blue));
    }
    return s;
}

void
SingleColourLayer::toXml(QTextStream &stream,
                         QString indent, QString extraAttributes) const
{
    QString s;
    
    QString colourName, colourSpec, darkbg;
    ColourDatabase::getInstance()->getStringValues
        (m_colour, colourName, colourSpec, darkbg);

    s += QString("colourName=\"%1\" "
                 "colour=\"%2\" "
                 "darkBackground=\"%3\" ")
	.arg(colourName)
        .arg(colourSpec)
        .arg(darkbg);

    Layer::toXml(stream, indent, extraAttributes + " " + s);
}

void
SingleColourLayer::setProperties(const QXmlAttributes &attributes)
{
    QString colourName = attributes.value("colourName");
    QString colourSpec = attributes.value("colour");
    QString darkbg = attributes.value("darkBackground");

    int colour = ColourDatabase::getInstance()->putStringValues
        (colourName, colourSpec, darkbg);

    m_colourExplicitlySet = true;

    if (m_colour != colour) {

        std::cerr << "SingleColourLayer::setProperties: changing colour from " << m_colour << " to " << colour << std::endl;

        if (m_colourRefCount.find(m_colour) != m_colourRefCount.end() &&
            m_colourRefCount[m_colour] > 0) {
            m_colourRefCount[m_colour]--;
        }

        m_colour = colour;

        if (m_colourRefCount.find(m_colour) == m_colourRefCount.end()) {
            m_colourRefCount[m_colour] = 1;
        } else {
            m_colourRefCount[m_colour]++;
        }

        flagBaseColourChanged();
    }
}