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diff --git a/src/imageplugins/coreplugin/hsl/hsltool.cpp b/src/imageplugins/coreplugin/hsl/hsltool.cpp
new file mode 100644
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--- /dev/null
+++ b/src/imageplugins/coreplugin/hsl/hsltool.cpp
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2004-07-16
+ * Description : digiKam image editor to adjust Hue, Saturation,
+ *               and Lightness of picture.
+ *
+ * Copyright (C) 2004-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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, 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.
+ *
+ * ============================================================ */
+
+// TQt includes.
+
+#include <tqcolor.h>
+#include <tqcombobox.h>
+#include <tqframe.h>
+#include <tqgroupbox.h>
+#include <tqhbuttongroup.h>
+#include <tqhgroupbox.h>
+#include <tqlabel.h>
+#include <tqlayout.h>
+#include <tqpushbutton.h>
+#include <tqtimer.h>
+#include <tqtooltip.h>
+#include <tqvbox.h>
+#include <tqvgroupbox.h>
+#include <tqwhatsthis.h>
+
+// KDE includes.
+
+#include <tdeapplication.h>
+#include <kcolordialog.h>
+#include <tdeconfig.h>
+#include <kcursor.h>
+#include <kiconloader.h>
+#include <tdelocale.h>
+#include <kstandarddirs.h>
+
+// LibKDcraw includes.
+
+#include <libkdcraw/rnuminput.h>
+
+// Digikam includes.
+
+#include "colorgradientwidget.h"
+#include "dimg.h"
+#include "editortoolsettings.h"
+#include "histogramwidget.h"
+#include "hslmodifier.h"
+#include "hspreviewwidget.h"
+#include "imageiface.h"
+#include "imagewidget.h"
+
+// Local includes.
+
+#include "hsltool.h"
+#include "hsltool.moc"
+
+using namespace KDcrawIface;
+using namespace Digikam;
+
+namespace DigikamImagesPluginCore
+{
+
+HSLTool::HSLTool(TQObject* parent)
+       : EditorTool(parent)
+{
+    setName("adjusthsl");
+    setToolName(i18n("Hue / Saturation / Lightness"));
+    setToolIcon(SmallIcon("adjusthsl"));
+    setToolHelp("hsladjusttool.anchor");
+
+    m_destinationPreviewData = 0;
+
+    ImageIface iface(0, 0);
+    m_originalImage = iface.getOriginalImg();
+
+    m_previewWidget = new ImageWidget("hsladjust Tool", 0,
+                                      i18n("<p>Here you can see the image "
+                                           "Hue/Saturation/Lightness adjustments preview. "
+                                           "You can pick color on image "
+                                           "to see the color level corresponding on histogram."));
+    setToolView(m_previewWidget);
+
+    // -------------------------------------------------------------
+
+    m_gboxSettings = new EditorToolSettings(EditorToolSettings::Default|
+                                            EditorToolSettings::Ok|
+                                            EditorToolSettings::Cancel);
+
+    TQGridLayout* gridSettings = new TQGridLayout(m_gboxSettings->plainPage(), 11, 4);
+
+    TQLabel *label1 = new TQLabel(i18n("Channel:"), m_gboxSettings->plainPage());
+    label1->setAlignment(TQt::AlignRight | TQt::AlignVCenter);
+    m_channelCB = new TQComboBox(false, m_gboxSettings->plainPage());
+    m_channelCB->insertItem(i18n("Luminosity"));
+    m_channelCB->insertItem(i18n("Red"));
+    m_channelCB->insertItem(i18n("Green"));
+    m_channelCB->insertItem(i18n("Blue"));
+    TQWhatsThis::add( m_channelCB, i18n("<p>Select the histogram channel to display here:<p>"
+                                       "<b>Luminosity</b>: display the image's luminosity values.<p>"
+                                       "<b>Red</b>: display the red image-channel values.<p>"
+                                       "<b>Green</b>: display the green image-channel values.<p>"
+                                       "<b>Blue</b>: display the blue image-channel values.<p>"));
+
+    m_scaleBG = new TQHButtonGroup(m_gboxSettings->plainPage());
+    m_scaleBG->setExclusive(true);
+    m_scaleBG->setFrameShape(TQFrame::NoFrame);
+    m_scaleBG->setInsideMargin( 0 );
+    TQWhatsThis::add( m_scaleBG, i18n("<p>Select the histogram scale here.<p>"
+                                     "If the image's maximal counts are small, you can use the linear scale.<p>"
+                                     "Logarithmic scale can be used when the maximal counts are big; "
+                                     "if it is used, all values (small and large) will be visible on the graph."));
+
+    TQPushButton *linHistoButton = new TQPushButton(m_scaleBG);
+    TQToolTip::add(linHistoButton, i18n("<p>Linear"));
+    m_scaleBG->insert(linHistoButton, HistogramWidget::LinScaleHistogram);
+    TDEGlobal::dirs()->addResourceType("histogram-lin", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
+    TQString directory = TDEGlobal::dirs()->findResourceDir("histogram-lin", "histogram-lin.png");
+    linHistoButton->setPixmap(TQPixmap(directory + "histogram-lin.png"));
+    linHistoButton->setToggleButton(true);
+
+    TQPushButton *logHistoButton = new TQPushButton(m_scaleBG);
+    TQToolTip::add(logHistoButton, i18n("<p>Logarithmic"));
+    m_scaleBG->insert(logHistoButton, HistogramWidget::LogScaleHistogram);
+    TDEGlobal::dirs()->addResourceType("histogram-log", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("histogram-log", "histogram-log.png");
+    logHistoButton->setPixmap(TQPixmap(directory + "histogram-log.png"));
+    logHistoButton->setToggleButton(true);
+
+    TQHBoxLayout* l1 = new TQHBoxLayout();
+    l1->addWidget(label1);
+    l1->addWidget(m_channelCB);
+    l1->addStretch(10);
+    l1->addWidget(m_scaleBG);
+
+    gridSettings->addMultiCellLayout(l1, 0, 0, 0, 4);
+
+    // -------------------------------------------------------------
+
+    TQVBox *histoBox   = new TQVBox(m_gboxSettings->plainPage());
+    m_histogramWidget = new HistogramWidget(256, 140, histoBox, false, true, true);
+    TQWhatsThis::add( m_histogramWidget, i18n("<p>Here you can see the target preview image histogram drawing "
+                                             "of the selected image channel. This one is re-computed at any "
+                                             "settings changes."));
+    TQLabel *space = new TQLabel(histoBox);
+    space->setFixedHeight(1);
+    m_hGradient = new ColorGradientWidget(ColorGradientWidget::Horizontal, 10, histoBox);
+    m_hGradient->setColors(TQColor("black"), TQColor("white"));
+
+    gridSettings->addMultiCellWidget(histoBox, 1, 2, 0, 4);
+
+    // -------------------------------------------------------------
+
+    m_HSSelector = new KHSSelector(m_gboxSettings->plainPage());
+    TQWhatsThis::add( m_HSSelector, i18n("<p>Select the hue and saturation adjustments of the image here."));
+    m_HSSelector->setMinimumSize(256, 142);
+    gridSettings->addMultiCellWidget(m_HSSelector, 3, 3, 0, 4);
+
+    m_HSPreview = new HSPreviewWidget(m_gboxSettings->plainPage());
+    TQWhatsThis::add( m_HSPreview, i18n("<p>You can see here a color preview of the hue and "
+                                       "saturation adjustments."));
+    m_HSPreview->setMinimumSize(256, 15);
+    gridSettings->addMultiCellWidget(m_HSPreview, 4, 4, 0, 4);
+
+    TQLabel *label2 = new TQLabel(i18n("Hue:"), m_gboxSettings->plainPage());
+    m_hInput       = new RDoubleNumInput(m_gboxSettings);
+    m_hInput->setPrecision(0);
+    m_hInput->setRange(-180.0, 180.0, 1.0);
+    m_hInput->setDefaultValue(0.0);
+    TQWhatsThis::add( m_hInput, i18n("<p>Set here the hue adjustment of the image."));
+    gridSettings->addMultiCellWidget(label2,    5, 5, 0, 4);
+    gridSettings->addMultiCellWidget(m_hInput,  6, 6, 0, 4);
+
+    TQLabel *label3 = new TQLabel(i18n("Saturation:"), m_gboxSettings->plainPage());
+    m_sInput       = new RDoubleNumInput(m_gboxSettings);
+    m_sInput->setPrecision(2);
+    m_sInput->setRange(-100.0, 100.0, 0.01);
+    m_sInput->setDefaultValue(0.0);
+    TQWhatsThis::add( m_sInput, i18n("<p>Set here the saturation adjustment of the image."));
+    gridSettings->addMultiCellWidget(label3,    7, 7, 0, 4);
+    gridSettings->addMultiCellWidget(m_sInput,  8, 8, 0, 4);
+
+    TQLabel *label4 = new TQLabel(i18n("Lightness:"), m_gboxSettings->plainPage());
+    m_lInput       = new RDoubleNumInput(m_gboxSettings->plainPage());
+    m_lInput->setPrecision(2);
+    m_lInput->setRange(-100.0, 100.0, 0.01);
+    m_lInput->setDefaultValue(0.0);
+    TQWhatsThis::add( m_lInput, i18n("<p>Set here the lightness adjustment of the image."));
+    gridSettings->addMultiCellWidget(label4,    9,  9, 0, 4);
+    gridSettings->addMultiCellWidget(m_lInput, 10, 10, 0, 4);
+
+    gridSettings->setRowStretch(11, 10);
+    setToolSettings(m_gboxSettings);
+    init();
+
+    // -------------------------------------------------------------
+
+    connect(m_HSSelector, TQ_SIGNAL(valueChanged(int, int)),
+            this, TQ_SLOT(slotHSChanged(int, int)));
+
+    connect(m_channelCB, TQ_SIGNAL(activated(int)),
+            this, TQ_SLOT(slotChannelChanged(int)));
+
+    connect(m_scaleBG, TQ_SIGNAL(released(int)),
+            this, TQ_SLOT(slotScaleChanged(int)));
+
+    connect(m_previewWidget, TQ_SIGNAL(spotPositionChangedFromTarget( const Digikam::DColor &, const TQPoint & )),
+            this, TQ_SLOT(slotColorSelectedFromTarget( const Digikam::DColor & )));
+
+    connect(m_hInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotTimer()));
+
+    connect(m_hInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotHChanged(double)));
+
+    connect(m_sInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotTimer()));
+
+    connect(m_sInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotSChanged(double)));
+
+    connect(m_lInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotTimer()));
+
+    connect(m_previewWidget, TQ_SIGNAL(signalResized()),
+            this, TQ_SLOT(slotEffect()));
+
+    // -------------------------------------------------------------
+
+    m_gboxSettings->enableButton(EditorToolSettings::Ok, false);
+}
+
+HSLTool::~HSLTool()
+{
+    if (m_destinationPreviewData)
+       delete [] m_destinationPreviewData;
+}
+
+void HSLTool::slotChannelChanged(int channel)
+{
+    switch (channel)
+    {
+        case LuminosityChannel:
+            m_histogramWidget->m_channelType = HistogramWidget::ValueHistogram;
+            m_hGradient->setColors(TQColor("black"), TQColor("white"));
+            break;
+
+        case RedChannel:
+            m_histogramWidget->m_channelType = HistogramWidget::RedChannelHistogram;
+            m_hGradient->setColors(TQColor("black"), TQColor("red"));
+            break;
+
+        case GreenChannel:
+            m_histogramWidget->m_channelType = HistogramWidget::GreenChannelHistogram;
+            m_hGradient->setColors(TQColor("black"), TQColor("green"));
+            break;
+
+        case BlueChannel:
+            m_histogramWidget->m_channelType = HistogramWidget::BlueChannelHistogram;
+            m_hGradient->setColors(TQColor("black"), TQColor("blue"));
+            break;
+    }
+
+    m_histogramWidget->repaint(false);
+}
+
+void HSLTool::slotScaleChanged(int scale)
+{
+    m_histogramWidget->m_scaleType = scale;
+    m_histogramWidget->repaint(false);
+}
+
+void HSLTool::slotColorSelectedFromTarget( const DColor &color )
+{
+    m_histogramWidget->setHistogramGuideByColor(color);
+}
+
+void HSLTool::slotHSChanged(int h, int s)
+{
+    double hue = double(h);
+    if (h >= 180 && h <= 359)
+        hue = double(h) - 359.0;
+
+    double sat = ((double) s * (200.0 / 255.0)) - 100.0;
+
+    m_hInput->blockSignals(true);
+    m_sInput->blockSignals(true);
+
+    m_hInput->setValue(hue);
+    m_sInput->setValue(sat);
+
+    m_hInput->blockSignals(false);
+    m_sInput->blockSignals(false);
+
+    slotTimer();
+}
+
+void HSLTool::slotHChanged(double h)
+{
+    int hue = int(h);
+    if (h >= -180 && h < 0)
+        hue = int(h) + 359;
+
+    m_HSSelector->blockSignals(true);
+    m_HSSelector->setXValue(hue);
+    m_HSSelector->blockSignals(false);
+}
+
+void HSLTool::slotSChanged(double s)
+{
+    int sat = (int) ((s + 100.0) * (255.0 / 200.0));
+
+    m_HSSelector->blockSignals(true);
+    m_HSSelector->setYValue(sat);
+    m_HSSelector->blockSignals(false);
+}
+
+void HSLTool::readSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("hsladjust Tool");
+    m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0));    // Luminosity.
+    m_scaleBG->setButton(config->readNumEntry("Histogram Scale", HistogramWidget::LogScaleHistogram));
+    m_hInput->setValue(config->readDoubleNumEntry("HueAjustment", m_hInput->defaultValue()));
+    m_sInput->setValue(config->readDoubleNumEntry("SaturationAjustment", m_sInput->defaultValue()));
+    m_lInput->setValue(config->readDoubleNumEntry("LighnessAjustment", m_lInput->defaultValue()));
+    slotHChanged(m_hInput->value());
+    slotSChanged(m_sInput->value());
+
+    m_histogramWidget->reset();
+
+    slotChannelChanged(m_channelCB->currentItem());
+    slotScaleChanged(m_scaleBG->selectedId());
+}
+
+void HSLTool::writeSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("hsladjust Tool");
+    config->writeEntry("Histogram Channel", m_channelCB->currentItem());
+    config->writeEntry("Histogram Scale", m_scaleBG->selectedId());
+    config->writeEntry("HueAjustment", m_hInput->value());
+    config->writeEntry("SaturationAjustment", m_sInput->value());
+    config->writeEntry("LighnessAjustment", m_lInput->value());
+    m_previewWidget->writeSettings();
+    config->sync();
+}
+
+void HSLTool::slotResetSettings()
+{
+    m_hInput->blockSignals(true);
+    m_sInput->blockSignals(true);
+    m_lInput->blockSignals(true);
+
+    m_hInput->slotReset();
+    m_sInput->slotReset();
+    m_lInput->slotReset();
+
+    slotHChanged(0.0);
+    slotSChanged(0.0);
+
+    slotEffect();
+
+    m_hInput->blockSignals(false);
+    m_sInput->blockSignals(false);
+    m_lInput->blockSignals(false);
+}
+
+void HSLTool::slotEffect()
+{
+    kapp->setOverrideCursor( KCursor::waitCursor() );
+
+    double hu  = m_hInput->value();
+    double sa  = m_sInput->value();
+    double lu  = m_lInput->value();
+
+    m_gboxSettings->enableButton(EditorToolSettings::Ok,
+                                ( hu != 0.0 || sa != 0.0 || lu != 0.0));
+
+    m_HSPreview->setHS(hu, sa);
+    m_histogramWidget->stopHistogramComputation();
+
+    if (m_destinationPreviewData)
+       delete [] m_destinationPreviewData;
+
+    ImageIface* iface = m_previewWidget->imageIface();
+    m_destinationPreviewData   = iface->getPreviewImage();
+    int w                      = iface->previewWidth();
+    int h                      = iface->previewHeight();
+    bool a                     = iface->previewHasAlpha();
+    bool sb                    = iface->previewSixteenBit();
+
+    DImg preview(w, h, sb, a, m_destinationPreviewData);
+    HSLModifier cmod;
+    cmod.setHue(hu);
+    cmod.setSaturation(sa);
+    cmod.setLightness(lu);
+    cmod.applyHSL(preview);
+    iface->putPreviewImage(preview.bits());
+
+    m_previewWidget->updatePreview();
+
+    // Update histogram.
+
+    memcpy(m_destinationPreviewData, preview.bits(), preview.numBytes());
+    m_histogramWidget->updateData(m_destinationPreviewData, w, h, sb, 0, 0, 0, false);
+
+    kapp->restoreOverrideCursor();
+}
+
+void HSLTool::finalRendering()
+{
+    kapp->setOverrideCursor(KCursor::waitCursor());
+
+    double hu  = m_hInput->value();
+    double sa  = m_sInput->value();
+    double lu  = m_lInput->value();
+
+    ImageIface* iface = m_previewWidget->imageIface();
+    uchar *data                = iface->getOriginalImage();
+    int w                      = iface->originalWidth();
+    int h                      = iface->originalHeight();
+    bool a                     = iface->originalHasAlpha();
+    bool sb                    = iface->originalSixteenBit();
+    DImg original(w, h, sb, a, data);
+    delete [] data;
+
+    HSLModifier cmod;
+    cmod.setHue(hu);
+    cmod.setSaturation(sa);
+    cmod.setLightness(lu);
+    cmod.applyHSL(original);
+
+    iface->putOriginalImage(i18n("HSL Adjustments"), original.bits());
+    kapp->restoreOverrideCursor();
+}
+
+}  // NameSpace DigikamImagesPluginCore
+