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/*
* Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <math.h>
#include <qpainter.h>
#include <qpixmap.h>
#include <qlabel.h>
#include <qcombobox.h>
#include <qbuttongroup.h>
#include <qpushbutton.h>
#include <qscrollbar.h>
#include <kdebug.h>
#include "kis_channelinfo.h"
#include "kis_histogram.h"
#include "kis_global.h"
#include "kis_types.h"
#include "kis_layer.h"
#include "kis_colorspace.h"
#include "kis_histogram_view.h"
#include "kis_basic_histogram_producers.h"
#include "kis_paint_device.h"
KisHistogramView::KisHistogramView(QWidget *parent, const char *name, WFlags f)
: QLabel(parent, name, f)
{
// This is needed until we can computationally scale it well. Until then, this is needed
// And when we have it, it won't hurt to have it around
setScaledContents(true);
setFrameShape(QFrame::Box); // Draw a box around ourselves
}
KisHistogramView::~KisHistogramView()
{
}
void KisHistogramView::setPaintDevice(KisPaintDeviceSP dev)
{
m_cs = dev->colorSpace();
setChannels(); // Sets m_currentProducer to the first in the list
if (!m_currentProducer)
return;
m_from = m_currentProducer->viewFrom();
m_width = m_currentProducer->viewWidth();
m_histogram = new KisHistogram(dev, m_currentProducer, LINEAR);
updateHistogram();
}
void KisHistogramView::setHistogram(KisHistogramSP histogram)
{
m_cs = 0;
m_histogram = histogram;
m_currentProducer = m_histogram->producer();
m_from = m_currentProducer->viewFrom();
m_width = m_currentProducer->viewWidth();
m_comboInfo.clear();
m_channelStrings.clear();
m_channels.clear();
m_channelToOffset.clear();
addProducerChannels(m_currentProducer);
// Set the currently viewed channel:
m_color = false;
m_channels.append(m_comboInfo.at(1).channel);
m_channelToOffset.append(0);
updateHistogram();
}
void KisHistogramView::setView(double from, double size)
{
m_from = from;
m_width = size;
if (m_from + m_width > 1.0)
m_from = 1.0 - m_width;
m_histogram->producer()->setView(m_from, m_width);
m_histogram->updateHistogram();
updateHistogram();
}
KisHistogramProducerSP KisHistogramView::currentProducer()
{
return m_currentProducer;
}
QStringList KisHistogramView::channelStrings()
{
return m_channelStrings;
}
KisIDList KisHistogramView::listProducers()
{
if (m_cs)
return KisHistogramProducerFactoryRegistry::instance()->listKeysCompatibleWith(m_cs);
return KisIDList();
}
void KisHistogramView::setCurrentChannels(const KisID& producerID, QValueVector<KisChannelInfo *> channels)
{
setCurrentChannels(
KisHistogramProducerFactoryRegistry::instance()->get(producerID)->generate(),
channels);
}
void KisHistogramView::setCurrentChannels(KisHistogramProducerSP producer, QValueVector<KisChannelInfo *> channels)
{
m_currentProducer = producer;
m_currentProducer->setView(m_from, m_width);
m_histogram->setProducer(m_currentProducer);
m_histogram->updateHistogram();
m_histogram->setChannel(0); // Set a default channel, just being nice
m_channels.clear();
m_channelToOffset.clear();
if (channels.count() == 0) {
updateHistogram();
return;
}
QValueVector<KisChannelInfo *> producerChannels = m_currentProducer->channels();
for (uint i = 0; i < channels.count(); i++) {
// Also makes sure the channel is actually in the producer's list
for (uint j = 0; j < producerChannels.count(); j++) {
if (channels.at(i)->name() == producerChannels.at(j)->name()) {
m_channelToOffset.append(m_channels.count()); // The first we append maps to 0
m_channels.append(channels.at(i));
}
}
}
updateHistogram();
}
bool KisHistogramView::hasColor()
{
return m_color;
}
void KisHistogramView::setColor(bool set)
{
if (set != m_color) {
m_color = set;
updateHistogram();
}
}
void KisHistogramView::setActiveChannel(int channel)
{
ComboboxInfo info = m_comboInfo.at(channel);
if (info.producer.data() != m_currentProducer.data()) {
m_currentProducer = info.producer;
m_currentProducer->setView(m_from, m_width);
m_histogram->setProducer(m_currentProducer);
m_histogram->updateHistogram();
}
m_channels.clear();
m_channelToOffset.clear();
if (!m_currentProducer) {
updateHistogram();
return;
}
if (info.isProducer) {
m_color = true;
m_channels = m_currentProducer->channels();
for (uint i = 0; i < m_channels.count(); i++)
m_channelToOffset.append(i);
m_histogram->setChannel(0); // Set a default channel, just being nice
} else {
m_color = false;
QValueVector<KisChannelInfo *> channels = m_currentProducer->channels();
for (uint i = 0; i < channels.count(); i++) {
KisChannelInfo* channel = channels.at(i);
if (channel->name() == info.channel->name()) {
m_channels.append(channel);
m_channelToOffset.append(i);
break;
}
}
}
updateHistogram();
}
void KisHistogramView::setHistogramType(enumHistogramType type)
{
m_histogram->setHistogramType(type);
updateHistogram();
}
void KisHistogramView::setChannels()
{
m_comboInfo.clear();
m_channelStrings.clear();
m_channels.clear();
m_channelToOffset.clear();
KisIDList list = KisHistogramProducerFactoryRegistry::instance()->listKeysCompatibleWith(m_cs);
if (list.count() == 0) {
// XXX: No native histogram for this colorspace. Using converted RGB. We should have a warning
KisGenericRGBHistogramProducerFactory f;
addProducerChannels(f.generate());
} else {
for (uint i = 0; i < list.count(); i++) {
KisID id(*(list.at(i)));
addProducerChannels( KisHistogramProducerFactoryRegistry::instance()->get(id)->generate() );
}
}
m_currentProducer = m_comboInfo.at(0).producer;
m_color = false;
// The currently displayed channel and its offset
m_channels.append(m_comboInfo.at(1).channel);
m_channelToOffset.append(0);
}
void KisHistogramView::addProducerChannels(KisHistogramProducerSP producer) {
ComboboxInfo info;
info.isProducer = true;
info.producer = producer;
// channel not used for a producer
QValueVector<KisChannelInfo *> channels = info.producer->channels();
int count = channels.count();
m_comboInfo.append(info);
m_channelStrings.append(producer->id() . name());
for (int j = 0; j < count; j++) {
info.isProducer = false;
info.channel = channels.at(j);
m_comboInfo.append(info);
m_channelStrings.append(QString(" ").append(info.channel->name()));
}
}
void KisHistogramView::updateHistogram()
{
Q_UINT32 height = this->height();
int selFrom, selTo; // from - to in bins
if (!m_currentProducer) { // Something's very wrong: no producer for this colorspace to update histogram with!
return;
}
Q_INT32 bins = m_histogram->producer()->numberOfBins();
m_pix = QPixmap(bins, height);
m_pix.fill();
QPainter p(&m_pix);
p.setBrush(Qt::black);
// Draw the box of the selection, if any
if (m_histogram->hasSelection()) {
double width = m_histogram->selectionTo() - m_histogram->selectionFrom();
double factor = static_cast<double>(bins) / m_histogram->producer()->viewWidth();
selFrom = static_cast<int>(m_histogram->selectionFrom() * factor);
selTo = selFrom + static_cast<int>(width * factor);
p.drawRect(selFrom, 0, selTo - selFrom, height);
} else {
// We don't want the drawing to think we're in a selected area
selFrom = -1;
selTo = 2;
}
Q_INT32 i = 0;
double highest = 0;
bool blackOnBlack = false;
// First we iterate once, so that we have the overall maximum. This is a bit inefficient,
// but not too much since the histogram caches the calculations
for (uint chan = 0; chan < m_channels.count(); chan++) {
m_histogram->setChannel(m_channelToOffset.at(chan));
if ((double)m_histogram->calculations().getHighest() > highest)
highest = (double)m_histogram->calculations().getHighest();
}
for (uint chan = 0; chan < m_channels.count(); chan++) {
QColor color;
m_histogram->setChannel(m_channelToOffset.at(chan));
if (m_color) {
color = m_channels.at(chan)->color();
p.setPen(color);
} else {
color = Qt::black;
}
blackOnBlack = (color == Qt::black);
if (m_histogram->getHistogramType() == LINEAR) {
double factor = (double)height / highest;
for( i=0; i<bins; ++i ) {
// So that we get a good view even with a selection box with
// black colors on background of black selection
if (i >= selFrom && i < selTo && blackOnBlack) {
p.setPen(Qt::white);
} else {
p.setPen(color);
}
p.drawLine(i, height, i, height - int(m_histogram->getValue(i) * factor));
}
} else {
double factor = (double)height / (double)log(highest);
for( i = 0; i < bins; ++i ) {
// Same as above
if (i >= selFrom && i < selTo && blackOnBlack) {
p.setPen(Qt::white);
} else {
p.setPen(color);
}
p.drawLine(i, height, i,
height - int(log((double)m_histogram->getValue(i)) * factor));
}
}
}
setPixmap(m_pix);
}
void KisHistogramView::mousePressEvent(QMouseEvent * e) {
if (e->button() == Qt::RightButton)
emit rightClicked(e->globalPos());
else
QLabel::mousePressEvent(e);
}
#include "kis_histogram_view.moc"
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