1 files changed, 354 insertions, 0 deletions
diff --git a/chalk/ui/kis_histogram_view.cpp b/chalk/ui/kis_histogram_view.cpp
new file mode 100644
index 000000000..3b94db619
--- /dev/null
+++ b/chalk/ui/kis_histogram_view.cpp
@@ -0,0 +1,354 @@
+/*
+ *  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 <tqpainter.h>
+#include <tqpixmap.h>
+#include <tqlabel.h>
+#include <tqcombobox.h>
+#include <tqbuttongroup.h>
+#include <tqpushbutton.h>
+#include <tqscrollbar.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(TQWidget *parent, const char *name, WFlags f)
+    : TQLabel(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(TQFrame::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;
+}
+
+TQStringList 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, TQValueVector<KisChannelInfo *> channels)
+{
+    setCurrentChannels(
+        KisHistogramProducerFactoryRegistry::instance()->get(producerID)->generate(),
+        channels);
+}
+
+void KisHistogramView::setCurrentChannels(KisHistogramProducerSP producer, TQValueVector<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;
+    }
+
+    TQValueVector<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;
+        TQValueVector<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
+        TQValueVector<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(TQString(" ").append(info.channel->name()));
+        }
+}
+
+void KisHistogramView::updateHistogram()
+{
+    TQ_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;
+    }
+
+    TQ_INT32 bins = m_histogram->producer()->numberOfBins();
+    m_pix = TQPixmap(bins, height);
+    m_pix.fill();
+    TQPainter p(&m_pix);
+    p.setBrush(TQt::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;
+    }
+
+    TQ_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++) {
+        TQColor color;
+        m_histogram->setChannel(m_channelToOffset.at(chan));
+
+        if (m_color) {
+            color = m_channels.at(chan)->color();
+            p.setPen(color);
+        } else {
+            color = TQt::black;
+        }
+        blackOnBlack = (color == TQt::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(TQt::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(TQt::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(TQMouseEvent * e) {
+    if (e->button() == Qt::RightButton)
+        emit rightClicked(e->globalPos());
+    else
+        TQLabel::mousePressEvent(e);
+}
+
+
+#include "kis_histogram_view.moc"