Rename 'digikam' folder to 'src'

Signed-off-by: Michele Calgaro <[email protected]>

1 files changed, 659 insertions, 0 deletions

diff --git a/src/imageplugins/adjustcurves/adjustcurvestool.cpp b/src/imageplugins/adjustcurves/adjustcurvestool.cpp
new file mode 100644
index 00000000..7bfd00f7
--- /dev/null
+++ b/src/imageplugins/adjustcurves/adjustcurvestool.cpp
@@ -0,0 +1,659 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2004-12-01
+ * Description : image histogram adjust curves.
+ *
+ * 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.
+ *
+ * ============================================================ */
+
+// C++ includes.
+
+#include <cmath>
+
+// TQt includes.
+
+#include <tqlayout.h>
+#include <tqcolor.h>
+#include <tqgroupbox.h>
+#include <tqhgroupbox.h>
+#include <tqvgroupbox.h>
+#include <tqlabel.h>
+#include <tqpainter.h>
+#include <tqcombobox.h>
+#include <tqspinbox.h>
+#include <tqwhatsthis.h>
+#include <tqtooltip.h>
+#include <tqpushbutton.h>
+#include <tqlayout.h>
+#include <tqframe.h>
+#include <tqtimer.h>
+#include <tqhbuttongroup.h>
+#include <tqpixmap.h>
+
+// KDE includes.
+
+#include <tdeconfig.h>
+#include <kcursor.h>
+#include <tdelocale.h>
+#include <knuminput.h>
+#include <tdemessagebox.h>
+#include <tdeselect.h>
+#include <tdefiledialog.h>
+#include <tdeglobalsettings.h>
+#include <tdeaboutdata.h>
+#include <khelpmenu.h>
+#include <kiconloader.h>
+#include <tdeapplication.h>
+#include <tdepopupmenu.h>
+#include <kstandarddirs.h>
+#include <kpushbutton.h>
+
+// Local includes.
+
+#include "daboutdata.h"
+#include "ddebug.h"
+#include "dimg.h"
+#include "imageiface.h"
+#include "imagewidget.h"
+#include "imagehistogram.h"
+#include "imagecurves.h"
+#include "editortoolsettings.h"
+#include "histogramwidget.h"
+#include "curveswidget.h"
+#include "colorgradientwidget.h"
+#include "dimgimagefilters.h"
+#include "adjustcurvestool.h"
+#include "adjustcurvestool.moc"
+
+using namespace Digikam;
+
+namespace DigikamAdjustCurvesImagesPlugin
+{
+
+AdjustCurvesTool::AdjustCurvesTool(TQObject* parent)
+                : EditorTool(parent)
+{
+    m_destinationPreviewData = 0;
+
+    ImageIface iface(0, 0);
+    m_originalImage = iface.getOriginalImg();
+
+    m_histoSegments = m_originalImage->sixteenBit() ? 65535 : 255;
+
+    setName("adjustcurves");
+    setToolName(i18n("Adjust Curves"));
+    setToolIcon(SmallIcon("adjustcurves"));
+
+    // -------------------------------------------------------------
+
+    m_previewWidget = new ImageWidget("adjustcurves Tool", 0,
+                                      i18n("<p>This is the image's curve-adjustments preview. "
+                                           "You can pick a spot on the image "
+                                           "to see the corresponding level in the histogram."));
+    setToolView(m_previewWidget);
+
+    // -------------------------------------------------------------
+
+    m_gboxSettings = new EditorToolSettings(EditorToolSettings::Default|
+                                            EditorToolSettings::Load|
+                                            EditorToolSettings::SaveAs|
+                                            EditorToolSettings::Ok|
+                                            EditorToolSettings::Cancel);
+
+    TQGridLayout* grid = new TQGridLayout(m_gboxSettings->plainPage(), 5, 5);
+
+    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") );
+    m_channelCB->insertItem( i18n("Alpha") );
+    m_channelCB->setCurrentText( i18n("Luminosity") );
+    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>"
+                                       "<b>Alpha</b>: display the alpha image-channel values. "
+                                       "This channel corresponds to the transparency value and "
+                                       "is supported by some image formats, such as PNG or TIF."));
+
+    m_scaleBG = new TQHButtonGroup(m_gboxSettings->plainPage());
+    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, CurvesWidget::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, CurvesWidget::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);
+
+    m_scaleBG->setExclusive(true);
+    m_scaleBG->setButton(CurvesWidget::LogScaleHistogram);
+    m_scaleBG->setFrameShape(TQFrame::NoFrame);
+    m_scaleBG->setInsideMargin(0);
+
+    TQHBoxLayout* l1 = new TQHBoxLayout();
+    l1->addWidget(label1);
+    l1->addWidget(m_channelCB);
+    l1->addStretch(10);
+    l1->addWidget(m_scaleBG);
+
+    // -------------------------------------------------------------
+
+    TQWidget *curveBox = new TQWidget(m_gboxSettings->plainPage());
+    TQGridLayout* gl   = new TQGridLayout(curveBox, 4, 2, 0);
+
+    m_histogramWidget = new HistogramWidget(256, 140, curveBox, 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 "
+                                             "curves settings changes."));
+
+    m_vGradient = new ColorGradientWidget( ColorGradientWidget::Vertical, 10, curveBox );
+    m_vGradient->setColors( TQColor( "white" ), TQColor( "black" ) );
+
+    TQLabel *spacev = new TQLabel(curveBox);
+    spacev->setFixedWidth(1);
+
+    m_curvesWidget = new CurvesWidget(256, 256, m_originalImage->bits(), m_originalImage->width(),
+                                                m_originalImage->height(), m_originalImage->sixteenBit(),
+                                                curveBox);
+    TQWhatsThis::add( m_curvesWidget, i18n("<p>This is the curve drawing of the selected channel from "
+                                          "original image"));
+
+    TQLabel *spaceh = new TQLabel(curveBox);
+    spaceh->setFixedHeight(1);
+
+    m_hGradient = new ColorGradientWidget( ColorGradientWidget::Horizontal, 10, curveBox );
+    m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
+
+    gl->addMultiCellWidget(m_histogramWidget, 0, 0, 2, 2);
+    gl->addMultiCellWidget(m_vGradient,       2, 2, 0, 0);
+    gl->addMultiCellWidget(spacev,            2, 2, 1, 1);
+    gl->addMultiCellWidget(m_curvesWidget,    2, 2, 2, 2);
+    gl->addMultiCellWidget(spaceh,            3, 3, 2, 2);
+    gl->addMultiCellWidget(m_hGradient,       4, 4, 2, 2);
+    gl->setRowSpacing(1, m_gboxSettings->spacingHint());
+
+    // -------------------------------------------------------------
+
+    m_curveType = new TQHButtonGroup(m_gboxSettings->plainPage());
+    m_curveFree = new TQPushButton(m_curveType);
+    m_curveType->insert(m_curveFree, FreeDrawing);
+    TDEGlobal::dirs()->addResourceType("curvefree", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("curvefree", "curvefree.png");
+    m_curveFree->setPixmap( TQPixmap( directory + "curvefree.png" ) );
+    m_curveFree->setToggleButton(true);
+    TQToolTip::add( m_curveFree, i18n( "Curve free mode" ) );
+    TQWhatsThis::add( m_curveFree, i18n("<p>With this button, you can draw your curve free-hand with the mouse."));
+    m_curveSmooth = new TQPushButton(m_curveType);
+    m_curveType->insert(m_curveSmooth, SmoothDrawing);
+    TDEGlobal::dirs()->addResourceType("curvemooth", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("curvemooth", "curvemooth.png");
+    m_curveSmooth->setPixmap( TQPixmap( directory + "curvemooth.png" ) );
+    m_curveSmooth->setToggleButton(true);
+    TQToolTip::add( m_curveSmooth, i18n( "Curve smooth mode" ) );
+    TQWhatsThis::add( m_curveSmooth, i18n("<p>With this button, you constrains the curve type to a smooth line with tension."));
+    m_curveType->setExclusive(true);
+    m_curveType->setButton(SmoothDrawing);
+    m_curveType->setFrameShape(TQFrame::NoFrame);
+
+    // -------------------------------------------------------------
+
+    m_pickerColorButtonGroup = new TQHButtonGroup(m_gboxSettings->plainPage());
+    m_pickBlack = new TQPushButton(m_pickerColorButtonGroup);
+    m_pickerColorButtonGroup->insert(m_pickBlack, BlackTonal);
+    TDEGlobal::dirs()->addResourceType("color-picker-black", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("color-picker-black", "color-picker-black.png");
+    m_pickBlack->setPixmap( TQPixmap( directory + "color-picker-black.png" ) );
+    m_pickBlack->setToggleButton(true);
+    TQToolTip::add( m_pickBlack, i18n( "All channels shadow tone color picker" ) );
+    TQWhatsThis::add( m_pickBlack, i18n("<p>With this button, you can pick the color from original image used to set <b>Shadow Tone</b> "
+                                       "smooth curves point on Red, Green, Blue, and Luminosity channels."));
+    m_pickGray  = new TQPushButton(m_pickerColorButtonGroup);
+    m_pickerColorButtonGroup->insert(m_pickGray, GrayTonal);
+    TDEGlobal::dirs()->addResourceType("color-picker-grey", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("color-picker-grey", "color-picker-grey.png");
+    m_pickGray->setPixmap( TQPixmap( directory + "color-picker-grey.png" ) );
+    m_pickGray->setToggleButton(true);
+    TQToolTip::add( m_pickGray, i18n( "All channels middle tone color picker" ) );
+    TQWhatsThis::add( m_pickGray, i18n("<p>With this button, you can pick the color from original image used to set <b>Middle Tone</b> "
+                                      "smooth curves point on Red, Green, Blue, and Luminosity channels."));
+    m_pickWhite = new TQPushButton(m_pickerColorButtonGroup);
+    m_pickerColorButtonGroup->insert(m_pickWhite, WhiteTonal);
+    TDEGlobal::dirs()->addResourceType("color-picker-white", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("color-picker-white", "color-picker-white.png");
+    m_pickWhite->setPixmap( TQPixmap( directory + "color-picker-white.png" ) );
+    m_pickWhite->setToggleButton(true);
+    TQToolTip::add( m_pickWhite, i18n( "All channels highlight tone color picker" ) );
+    TQWhatsThis::add( m_pickWhite, i18n("<p>With this button, you can pick the color from original image used to set <b>Highlight Tone</b> "
+                                       "smooth curves point on Red, Green, Blue, and Luminosity channels."));
+    m_pickerColorButtonGroup->setExclusive(true);
+    m_pickerColorButtonGroup->setFrameShape(TQFrame::NoFrame);
+
+    // -------------------------------------------------------------
+
+    m_resetButton = new TQPushButton(i18n("&Reset"), m_gboxSettings->plainPage());
+    m_resetButton->setPixmap( SmallIcon("reload_page", 18) );
+    TQToolTip::add( m_resetButton, i18n( "Reset current channel curves' values." ) );
+    TQWhatsThis::add( m_resetButton, i18n("<p>If you press this button, all curves' values "
+                                         "from the current selected channel "
+                                         "will be reset to the default values."));
+
+    TQHBoxLayout* l3 = new TQHBoxLayout();
+    l3->addWidget(m_curveType);
+    l3->addWidget(m_pickerColorButtonGroup);
+    l3->addWidget(m_resetButton);
+    l3->addStretch(10);
+
+    grid->addMultiCellLayout(l1,       0, 0, 1, 5);
+    grid->addMultiCellWidget(curveBox, 1, 3, 0, 5);
+    grid->addMultiCellLayout(l3,       4, 4, 1, 5);
+    grid->setMargin(0);
+    grid->setSpacing(m_gboxSettings->spacingHint());
+    grid->setRowStretch(5, 10);
+
+    setToolSettings(m_gboxSettings);
+    init();
+
+    // -------------------------------------------------------------
+
+    connect(m_curvesWidget, TQ_SIGNAL(signalCurvesChanged()),
+            this, TQ_SLOT(slotTimer()));
+
+    connect(m_previewWidget, TQ_SIGNAL(spotPositionChangedFromOriginal(const Digikam::DColor&, const TQPoint&)),
+            this, TQ_SLOT(slotSpotColorChanged(const Digikam::DColor&)));
+
+    connect(m_previewWidget, TQ_SIGNAL(spotPositionChangedFromTarget(const Digikam::DColor&, const TQPoint&)),
+            this, TQ_SLOT(slotColorSelectedFromTarget(const Digikam::DColor&)));
+
+    connect(m_previewWidget, TQ_SIGNAL(signalResized()),
+            this, TQ_SLOT(slotEffect()));
+
+    // -------------------------------------------------------------
+    // ComboBox slots.
+
+    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_curveType, TQ_SIGNAL(clicked(int)),
+            this, TQ_SLOT(slotCurveTypeChanged(int)));
+
+    // -------------------------------------------------------------
+    // Buttons slots.
+
+    connect(m_resetButton, TQ_SIGNAL(clicked()),
+            this, TQ_SLOT(slotResetCurrentChannel()));
+
+    connect(m_pickerColorButtonGroup, TQ_SIGNAL(released(int)),
+            this, TQ_SLOT(slotPickerColorButtonActived()));
+}
+
+AdjustCurvesTool::~AdjustCurvesTool()
+{
+    if (m_destinationPreviewData)
+       delete [] m_destinationPreviewData;
+}
+
+void AdjustCurvesTool::slotPickerColorButtonActived()
+{
+    // Save previous rendering mode and toggle to original image.
+    m_currentPreviewMode = m_previewWidget->getRenderingPreviewMode();
+    m_previewWidget->setRenderingPreviewMode(ImageGuideWidget::PreviewOriginalImage);
+}
+
+void AdjustCurvesTool::slotSpotColorChanged(const DColor &color)
+{
+    DColor sc = color;
+
+    if ( m_pickBlack->isOn() )
+    {
+       // Black tonal curves point.
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::ValueChannel, 1,
+                               TQPoint(TQMAX(TQMAX(sc.red(), sc.green()), sc.blue()), 42*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::RedChannel, 1, TQPoint(sc.red(), 42*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::GreenChannel, 1, TQPoint(sc.green(), 42*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::BlueChannel, 1, TQPoint(sc.blue(), 42*m_histoSegments/256));
+       m_pickBlack->setOn(false);
+    }
+    else if ( m_pickGray->isOn() )
+    {
+       // Gray tonal curves point.
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::ValueChannel, 8,
+                               TQPoint(TQMAX(TQMAX(sc.red(), sc.green()), sc.blue()), 128*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::RedChannel, 8, TQPoint(sc.red(), 128*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::GreenChannel, 8, TQPoint(sc.green(), 128*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::BlueChannel, 8, TQPoint(sc.blue(), 128*m_histoSegments/256));
+       m_pickGray->setOn(false);
+    }
+    else if ( m_pickWhite->isOn() )
+    {
+       // White tonal curves point.
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::ValueChannel, 15,
+                               TQPoint(TQMAX(TQMAX(sc.red(), sc.green()), sc.blue()), 213*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::RedChannel, 15, TQPoint(sc.red(), 213*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::GreenChannel, 15, TQPoint(sc.green(), 213*m_histoSegments/256));
+       m_curvesWidget->curves()->setCurvePoint(ImageHistogram::BlueChannel, 15, TQPoint(sc.blue(), 213*m_histoSegments/256));
+       m_pickWhite->setOn(false);
+    }
+    else
+    {
+       m_curvesWidget->setCurveGuide(color);
+       return;
+    }
+
+    // Calculate Red, green, blue curves.
+
+    for (int i = ImageHistogram::ValueChannel ; i <= ImageHistogram::BlueChannel ; i++)
+       m_curvesWidget->curves()->curvesCalculateCurve(i);
+
+    m_curvesWidget->repaint(false);
+
+    // restore previous rendering mode.
+    m_previewWidget->setRenderingPreviewMode(m_currentPreviewMode);
+
+    slotEffect();
+}
+
+void AdjustCurvesTool::slotColorSelectedFromTarget( const DColor &color )
+{
+    m_histogramWidget->setHistogramGuideByColor(color);
+}
+
+void AdjustCurvesTool::slotResetCurrentChannel()
+{
+    m_curvesWidget->curves()->curvesChannelReset(m_channelCB->currentItem());
+
+    m_curvesWidget->repaint();
+    slotEffect();
+    m_histogramWidget->reset();
+}
+
+void AdjustCurvesTool::slotEffect()
+{
+    ImageIface* iface = m_previewWidget->imageIface();
+    uchar *orgData    = iface->getPreviewImage();
+    int w             = iface->previewWidth();
+    int h             = iface->previewHeight();
+    bool sb           = iface->previewSixteenBit();
+
+    // Create the new empty destination image data space.
+    m_histogramWidget->stopHistogramComputation();
+
+    if (m_destinationPreviewData)
+       delete [] m_destinationPreviewData;
+
+    m_destinationPreviewData = new uchar[w*h*(sb ? 8 : 4)];
+
+    // Calculate the LUT to apply on the image.
+    m_curvesWidget->curves()->curvesLutSetup(ImageHistogram::AlphaChannel);
+
+    // Apply the lut to the image.
+    m_curvesWidget->curves()->curvesLutProcess(orgData, m_destinationPreviewData, w, h);
+
+    iface->putPreviewImage(m_destinationPreviewData);
+    m_previewWidget->updatePreview();
+
+    // Update histogram.
+    m_histogramWidget->updateData(m_destinationPreviewData, w, h, sb, 0, 0, 0, false);
+    delete [] orgData;
+}
+
+void AdjustCurvesTool::finalRendering()
+{
+    kapp->setOverrideCursor( KCursor::waitCursor() );
+    ImageIface* iface = m_previewWidget->imageIface();
+    uchar *orgData    = iface->getOriginalImage();
+    int w             = iface->originalWidth();
+    int h             = iface->originalHeight();
+    bool sb           = iface->originalSixteenBit();
+
+    // Create the new empty destination image data space.
+    uchar* desData = new uchar[w*h*(sb ? 8 : 4)];
+
+    // Calculate the LUT to apply on the image.
+    m_curvesWidget->curves()->curvesLutSetup(ImageHistogram::AlphaChannel);
+
+    // Apply the lut to the image.
+    m_curvesWidget->curves()->curvesLutProcess(orgData, desData, w, h);
+
+    iface->putOriginalImage(i18n("Adjust Curves"), desData);
+    kapp->restoreOverrideCursor();
+
+    delete [] orgData;
+    delete [] desData;
+}
+
+void AdjustCurvesTool::slotChannelChanged(int channel)
+{
+    switch(channel)
+    {
+       case LuminosityChannel:
+          m_histogramWidget->m_channelType = HistogramWidget::ValueHistogram;
+          m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_curvesWidget->m_channelType = CurvesWidget::ValueHistogram;
+          m_vGradient->setColors( TQColor( "white" ), TQColor( "black" ) );
+          break;
+
+        case RedChannel:
+          m_histogramWidget->m_channelType = HistogramWidget::RedChannelHistogram;
+          m_hGradient->setColors( TQColor( "black" ), TQColor( "red" ) );
+          m_curvesWidget->m_channelType = CurvesWidget::RedChannelHistogram;
+          m_vGradient->setColors( TQColor( "red" ), TQColor( "black" ) );
+          break;
+
+       case GreenChannel:
+          m_histogramWidget->m_channelType = HistogramWidget::GreenChannelHistogram;
+          m_hGradient->setColors( TQColor( "black" ), TQColor( "green" ) );
+          m_curvesWidget->m_channelType = CurvesWidget::GreenChannelHistogram;
+          m_vGradient->setColors( TQColor( "green" ), TQColor( "black" ) );
+          break;
+
+       case BlueChannel:
+          m_histogramWidget->m_channelType = HistogramWidget::BlueChannelHistogram;
+          m_hGradient->setColors( TQColor( "black" ), TQColor( "blue" ) );
+          m_curvesWidget->m_channelType = CurvesWidget::BlueChannelHistogram;
+          m_vGradient->setColors( TQColor( "blue" ), TQColor( "black" ) );
+          break;
+
+       case AlphaChannel:
+          m_histogramWidget->m_channelType = HistogramWidget::AlphaChannelHistogram;
+          m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_curvesWidget->m_channelType = CurvesWidget::AlphaChannelHistogram;
+          m_vGradient->setColors( TQColor( "white" ), TQColor( "black" ) );
+          break;
+    }
+
+    m_curveType->setButton(m_curvesWidget->curves()->getCurveType(channel));
+
+    m_curvesWidget->repaint(false);
+    m_histogramWidget->repaint(false);
+}
+
+void AdjustCurvesTool::slotScaleChanged(int scale)
+{
+    m_curvesWidget->m_scaleType    = scale;
+    m_histogramWidget->m_scaleType = scale;
+    m_histogramWidget->repaint(false);
+    m_curvesWidget->repaint(false);
+}
+
+void AdjustCurvesTool::slotCurveTypeChanged(int type)
+{
+    switch(type)
+    {
+       case SmoothDrawing:
+       {
+          m_curvesWidget->curves()->setCurveType(m_curvesWidget->m_channelType, ImageCurves::CURVE_SMOOTH);
+          m_pickerColorButtonGroup->setEnabled(true);
+          break;
+       }
+
+       case FreeDrawing:
+       {
+          m_curvesWidget->curves()->setCurveType(m_curvesWidget->m_channelType, ImageCurves::CURVE_FREE);
+          m_pickerColorButtonGroup->setEnabled(false);
+          break;
+       }
+    }
+
+    m_curvesWidget->curveTypeChanged();
+}
+
+void AdjustCurvesTool::readSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("adjustcurves Tool");
+
+    m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0));    // Luminosity.
+    m_scaleBG->setButton(config->readNumEntry("Histogram Scale", HistogramWidget::LogScaleHistogram));
+
+    m_curvesWidget->reset();
+
+    for (int i = 0 ; i < 5 ; i++)
+    {
+        m_curvesWidget->curves()->curvesChannelReset(i);
+        m_curvesWidget->curves()->setCurveType(i, (ImageCurves::CurveType)config->readNumEntry(TQString("CurveTypeChannel%1").arg(i),
+                                                                                        ImageCurves::CURVE_SMOOTH));
+
+        for (int j = 0 ; j < 17 ; j++)
+        {
+            TQPoint disable(-1, -1);
+            TQPoint p = config->readPointEntry(TQString("CurveAjustmentChannel%1Point%2").arg(i).arg(j), &disable);
+
+            if (m_originalImage->sixteenBit() && p.x() != -1)
+            {
+                p.setX(p.x()*255);
+                p.setY(p.y()*255);
+            }
+
+            m_curvesWidget->curves()->setCurvePoint(i, j, p);
+        }
+
+        m_curvesWidget->curves()->curvesCalculateCurve(i);
+    }
+
+    m_histogramWidget->reset();
+    slotChannelChanged(m_channelCB->currentItem());
+    slotScaleChanged(m_scaleBG->selectedId());
+    slotEffect();
+}
+
+void AdjustCurvesTool::writeSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("adjustcurves Tool");
+    config->writeEntry("Histogram Channel", m_channelCB->currentItem());
+    config->writeEntry("Histogram Scale", m_scaleBG->selectedId());
+
+    for (int i = 0 ; i < 5 ; i++)
+    {
+        config->writeEntry(TQString("CurveTypeChannel%1").arg(i), m_curvesWidget->curves()->getCurveType(i));
+
+        for (int j = 0 ; j < 17 ; j++)
+        {
+            TQPoint p = m_curvesWidget->curves()->getCurvePoint(i, j);
+
+            if (m_originalImage->sixteenBit() && p.x() != -1)
+            {
+                p.setX(p.x()/255);
+                p.setY(p.y()/255);
+            }
+
+            config->writeEntry(TQString("CurveAjustmentChannel%1Point%2").arg(i).arg(j), p);
+        }
+    }
+
+    m_previewWidget->writeSettings();
+    config->sync();
+}
+
+void AdjustCurvesTool::slotResetSettings()
+{
+    for (int channel = 0 ; channel < 5 ; channel++)
+       m_curvesWidget->curves()->curvesChannelReset(channel);
+
+    m_curvesWidget->reset();
+    slotEffect();
+    m_histogramWidget->reset();
+}
+
+void AdjustCurvesTool::slotLoadSettings()
+{
+    KURL loadCurvesFile;
+
+    loadCurvesFile = KFileDialog::getOpenURL(TDEGlobalSettings::documentPath(),
+                                             TQString( "*" ), kapp->activeWindow(),
+                                             TQString( i18n("Select Gimp Curves File to Load")) );
+    if( loadCurvesFile.isEmpty() )
+       return;
+
+    if ( m_curvesWidget->curves()->loadCurvesFromGimpCurvesFile( loadCurvesFile ) == false )
+    {
+       KMessageBox::error(kapp->activeWindow(), i18n("Cannot load from the Gimp curves text file."));
+       return;
+    }
+
+    // Refresh the current curves config.
+    slotChannelChanged(m_channelCB->currentItem());
+    slotEffect();
+}
+
+void AdjustCurvesTool::slotSaveAsSettings()
+{
+    KURL saveCurvesFile;
+
+    saveCurvesFile = KFileDialog::getSaveURL(TDEGlobalSettings::documentPath(),
+                                             TQString( "*" ), kapp->activeWindow(),
+                                             TQString( i18n("Gimp Curves File to Save")) );
+    if( saveCurvesFile.isEmpty() )
+       return;
+
+    if ( m_curvesWidget->curves()->saveCurvesToGimpCurvesFile( saveCurvesFile ) == false )
+    {
+       KMessageBox::error(kapp->activeWindow(), i18n("Cannot save to the Gimp curves text file."));
+       return;
+    }
+
+    // Refresh the current curves config.
+    slotChannelChanged(m_channelCB->currentItem());
+}
+
+}  // NameSpace DigikamAdjustCurvesImagesPlugin