Rename 'digikam' folder to 'src'

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

1 files changed, 913 insertions, 0 deletions

diff --git a/src/imageplugins/adjustlevels/adjustlevels.cpp b/src/imageplugins/adjustlevels/adjustlevels.cpp
new file mode 100644
index 00000000..72d5e46b
--- /dev/null
+++ b/src/imageplugins/adjustlevels/adjustlevels.cpp
@@ -0,0 +1,913 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2004-07-20
+ * Description : image histogram adjust levels.
+ *
+ * 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>
+
+// Local includes.
+
+#include "version.h"
+#include "ddebug.h"
+#include "imageiface.h"
+#include "imagewidget.h"
+#include "imagehistogram.h"
+#include "imagelevels.h"
+#include "histogramwidget.h"
+#include "dimgimagefilters.h"
+#include "adjustlevels.h"
+#include "adjustlevels.moc"
+
+namespace DigikamAdjustLevelsImagesPlugin
+{
+
+AdjustLevelDialog::AdjustLevelDialog(TQWidget* parent)
+                 : Digikam::ImageDlgBase(parent, i18n("Adjust Color Levels"), 
+                   "adjustlevels", true, false)
+{
+    m_destinationPreviewData = 0L;
+
+    Digikam::ImageIface iface(0, 0);
+    uchar *data     = iface.getOriginalImage();
+    int w           = iface.originalWidth();
+    int h           = iface.originalHeight();
+    bool sixteenBit = iface.originalSixteenBit();
+    bool hasAlpha   = iface.originalHasAlpha();
+    m_originalImage = Digikam::DImg(w, h, sixteenBit, hasAlpha ,data);
+    delete [] data;
+
+    m_histoSegments = m_originalImage.sixteenBit() ? 65535 : 255;
+    m_levels = new Digikam::ImageLevels(m_originalImage.sixteenBit());
+
+    // About data and help button.
+
+    TDEAboutData* about = new TDEAboutData("digikam",
+                                       I18N_NOOP("Adjust Color Levels"),
+                                       digikam_version,
+                                       I18N_NOOP("An image-histogram-levels adjustment plugin for digiKam."),
+                                       TDEAboutData::License_GPL,
+                                       "(c) 2004-2008, Gilles Caulier",
+                                       0,
+                                       "http://www.digikam.org");
+
+    about->addAuthor("Gilles Caulier", I18N_NOOP("Author and maintainer"),
+                     "caulier dot gilles at gmail dot com");
+
+    setAboutData(about);
+
+    // -------------------------------------------------------------
+
+    m_previewWidget = new Digikam::ImageWidget("adjustlevels Tool Dialog", plainPage(),
+                                               i18n("<p>Here you can see the image's "
+                                                    "level-adjustments preview. You can pick a spot on the image "
+                                                    "to see the corresponding level in the histogram."));
+    setPreviewAreaWidget(m_previewWidget); 
+
+    // -------------------------------------------------------------
+
+    TQWidget *gboxSettings = new TQWidget(plainPage());
+    TQGridLayout* grid     = new TQGridLayout(gboxSettings, 16, 8, spacingHint(), 0);
+
+    TQLabel *label1 = new TQLabel(i18n("Channel:"), gboxSettings);
+    label1->setAlignment ( TQt::AlignRight | TQt::AlignVCenter );
+    m_channelCB = new TQComboBox( false, gboxSettings );
+    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>Here select the histogram channel to display:<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(gboxSettings);
+    m_scaleBG->setExclusive(true);
+    m_scaleBG->setFrameShape(TQFrame::NoFrame);
+    m_scaleBG->setInsideMargin( 0 );
+    TQWhatsThis::add( m_scaleBG, i18n("<p>Here select the histogram scale.<p>"
+                                     "If the image's maximal counts are small, you can use the linear scale.<p>"
+                                     "The 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, Digikam::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, Digikam::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);
+
+    // -------------------------------------------------------------
+
+    m_histogramWidget = new Digikam::HistogramWidget(256, 140, gboxSettings, 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 levels "
+                                             "settings changes."));
+    
+    m_levelsHistogramWidget = new Digikam::HistogramWidget(256, 140, m_originalImage.bits(), m_originalImage.width(),
+                                                     m_originalImage.height(), m_originalImage.sixteenBit(), gboxSettings, false);
+    TQWhatsThis::add( m_levelsHistogramWidget, i18n("<p>This is the histogram drawing of the selected channel "
+                                                   "from original image"));
+
+    // -------------------------------------------------------------
+    
+    m_hGradientMinInput = new KGradientSelector( TDESelector::Horizontal, gboxSettings );
+    m_hGradientMinInput->setFixedHeight( 20 );
+    m_hGradientMinInput->setMinValue(0);
+    m_hGradientMinInput->setMaxValue(m_histoSegments);
+    TQWhatsThis::add( m_hGradientMinInput, i18n("<p>Select the minimal intensity input value of the histogram."));
+    TQToolTip::add( m_hGradientMinInput, i18n( "Minimal intensity input." ) );
+    m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+    m_hGradientMinInput->installEventFilter(this);
+
+    m_hGradientMaxInput = new KGradientSelector( TDESelector::Horizontal, gboxSettings );
+    m_hGradientMaxInput->setFixedHeight( 20 );
+    m_hGradientMaxInput->setMinValue(0);
+    m_hGradientMaxInput->setMaxValue(m_histoSegments);
+    TQWhatsThis::add( m_hGradientMaxInput, i18n("<p>Select the maximal intensity input value of the histogram."));
+    TQToolTip::add( m_hGradientMaxInput, i18n( "Maximal intensity input." ) );
+    m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+    m_hGradientMaxInput->installEventFilter(this);
+
+    m_minInput = new TQSpinBox(0, m_histoSegments, 1, gboxSettings);
+    m_minInput->setValue(0);
+    TQWhatsThis::add( m_minInput, i18n("<p>Select the minimal intensity input value of the histogram."));
+    TQToolTip::add( m_minInput, i18n( "Minimal intensity input." ) );
+    
+    m_gammaInput = new KDoubleNumInput(gboxSettings);
+    m_gammaInput->setPrecision(2);
+    m_gammaInput->setRange(0.1, 3.0, 0.01);
+    m_gammaInput->setValue(1.0);
+    TQToolTip::add( m_gammaInput, i18n( "Gamma input value." ) );
+    TQWhatsThis::add( m_gammaInput, i18n("<p>Select the gamma input value."));
+    
+    m_maxInput = new TQSpinBox(0, m_histoSegments, 1, gboxSettings);
+    m_maxInput->setValue(m_histoSegments);
+    TQToolTip::add( m_maxInput, i18n( "Maximal intensity input." ) );
+    TQWhatsThis::add( m_maxInput, i18n("<p>Select the maximal intensity input value of the histogram."));
+
+    m_hGradientMinOutput = new KGradientSelector( TDESelector::Horizontal, gboxSettings );
+    m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+    TQWhatsThis::add( m_hGradientMinOutput, i18n("<p>Select the minimal intensity output value of the histogram."));    
+    TQToolTip::add( m_hGradientMinOutput, i18n( "Minimal intensity output." ) );
+    m_hGradientMinOutput->setFixedHeight( 20 );
+    m_hGradientMinOutput->setMinValue(0);
+    m_hGradientMinOutput->setMaxValue(m_histoSegments);
+    m_hGradientMinOutput->installEventFilter(this);
+    
+    m_hGradientMaxOutput = new KGradientSelector( TDESelector::Horizontal, gboxSettings );
+    m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+    TQWhatsThis::add( m_hGradientMaxOutput, i18n("<p>Select the maximal intensity output value of the histogram."));
+    TQToolTip::add( m_hGradientMaxOutput, i18n( "Maximal intensity output." ) );
+    m_hGradientMaxOutput->setFixedHeight( 20 );
+    m_hGradientMaxOutput->setMinValue(0);
+    m_hGradientMaxOutput->setMaxValue(m_histoSegments);
+    m_hGradientMaxOutput->installEventFilter(this);
+    
+    m_minOutput = new TQSpinBox(0, m_histoSegments, 1, gboxSettings);
+    m_minOutput->setValue(0);
+    TQToolTip::add( m_minOutput, i18n( "Minimal intensity output." ) );
+    TQWhatsThis::add( m_minOutput, i18n("<p>Select the minimal intensity output value of the histogram."));
+    
+    m_maxOutput = new TQSpinBox(0, m_histoSegments, 1, gboxSettings);
+    m_maxOutput->setValue(m_histoSegments);
+    TQToolTip::add( m_maxOutput, i18n( "Maximal intensity output." ) );
+    TQWhatsThis::add( m_maxOutput, i18n("<p>Select the maximal intensity output value of the histogram."));
+
+    // -------------------------------------------------------------
+
+    m_pickerColorButtonGroup = new TQHButtonGroup(gboxSettings);
+    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> "
+                                       "levels input on Red, Green, Blue, and Luminosity channels."));
+    m_pickGray  = new TQPushButton(m_pickerColorButtonGroup);
+    m_pickerColorButtonGroup->insert(m_pickGray, GrayTonal);
+    TDEGlobal::dirs()->addResourceType("color-picker-gray", TDEGlobal::dirs()->kde_default("data") +
+                                     "digikam/data");
+    directory = TDEGlobal::dirs()->findResourceDir("color-picker-gray", "color-picker-gray.png");
+    m_pickGray->setPixmap( TQPixmap( directory + "color-picker-gray.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> "
+                                      "levels input 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> "
+                                       "levels input on Red, Green, Blue, and Luminosity channels."));
+    m_pickerColorButtonGroup->setExclusive(true);
+    m_pickerColorButtonGroup->setFrameShape(TQFrame::NoFrame);    
+
+    m_autoButton = new TQPushButton(gboxSettings);
+    m_autoButton->setPixmap(kapp->iconLoader()->loadIcon("system-run", (TDEIcon::Group)TDEIcon::Toolbar));    TQToolTip::add( m_autoButton, i18n( "Adjust all levels automatically." ) );
+    TQWhatsThis::add( m_autoButton, i18n("<p>If you press this button, all channel levels will be adjusted "
+                                        "automatically."));
+
+    m_resetButton = new TQPushButton(i18n("&Reset"), gboxSettings);
+    m_resetButton->setPixmap(kapp->iconLoader()->loadIcon("reload_page", (TDEIcon::Group)TDEIcon::Toolbar));     
+    TQToolTip::add( m_resetButton, i18n( "Reset current channel levels' values." ) );
+    TQWhatsThis::add( m_resetButton, i18n("<p>If you press this button, all levels' values "
+                                         "from the current selected channel "
+                                         "will be reset to the default values."));
+
+    TQLabel *space = new TQLabel(gboxSettings);
+    space->setFixedWidth(spacingHint());    
+
+    TQHBoxLayout* l3 = new TQHBoxLayout();
+    l3->addWidget(m_pickerColorButtonGroup);
+    l3->addWidget(m_autoButton);
+    l3->addWidget(space);
+    l3->addWidget(m_resetButton);
+    l3->addStretch(10);
+
+    // -------------------------------------------------------------
+    
+    grid->addMultiCellLayout(l1, 0, 0, 0, 6);
+    grid->setRowSpacing(1, spacingHint());
+    grid->addMultiCellWidget(m_histogramWidget, 2, 2, 1, 5);
+    grid->setRowSpacing(3, spacingHint());
+    grid->addMultiCellWidget(m_levelsHistogramWidget, 4, 4, 1, 5);
+    grid->addMultiCellWidget(m_hGradientMinInput, 5, 5, 0, 6);
+    grid->addMultiCellWidget(m_minInput, 5, 5, 8, 8);
+    grid->setRowSpacing(6, spacingHint());
+    grid->addMultiCellWidget(m_hGradientMaxInput, 7, 7, 0, 6);
+    grid->addMultiCellWidget(m_maxInput, 7, 7, 8, 8);
+    grid->setRowSpacing(8, spacingHint());
+    grid->addMultiCellWidget(m_gammaInput, 9, 9, 0, 8);
+    grid->setRowSpacing(10, spacingHint());
+    grid->addMultiCellWidget(m_hGradientMinOutput, 11, 11, 0, 6);
+    grid->addMultiCellWidget(m_minOutput, 11, 11, 8, 8);
+    grid->setRowSpacing(12, spacingHint());
+    grid->addMultiCellWidget(m_hGradientMaxOutput, 13, 13, 0, 6);
+    grid->addMultiCellWidget(m_maxOutput, 13, 13, 8, 8);
+    grid->setRowSpacing(14, spacingHint());
+    grid->addMultiCellLayout(l3, 15, 15, 0, 8);
+    grid->setRowStretch(16, 10);
+    grid->setColStretch(2, 10);
+    grid->setColSpacing(0, 5);
+    grid->setColSpacing(6, 5);
+    grid->setColSpacing(7, spacingHint());
+    
+    setUserAreaWidget(gboxSettings);    
+                    
+    // -------------------------------------------------------------
+    // Channels and scale selection 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_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()));                                                            
+                        
+    // -------------------------------------------------------------
+    // Color sliders and spinbox slots.
+
+    connect(m_hGradientMinInput, TQ_SIGNAL(valueChanged(int)),
+            this, TQ_SLOT(slotAdjustMinInputSpinBox(int)));
+
+    connect(m_minInput, TQ_SIGNAL(valueChanged (int)),
+            this, TQ_SLOT(slotAdjustSliders()));
+
+    connect(m_gammaInput, TQ_SIGNAL(valueChanged (double)),
+            this, TQ_SLOT(slotGammaInputchanged(double)));
+
+    connect(m_hGradientMaxInput, TQ_SIGNAL(valueChanged(int)),
+            this, TQ_SLOT(slotAdjustMaxInputSpinBox(int)));
+
+    connect(m_maxInput, TQ_SIGNAL(valueChanged (int)),
+            this, TQ_SLOT(slotAdjustSliders()));
+
+    connect(m_hGradientMinOutput, TQ_SIGNAL(valueChanged(int)),
+            this, TQ_SLOT(slotAdjustMinOutputSpinBox(int)));
+
+    connect(m_minOutput, TQ_SIGNAL(valueChanged (int)),
+            this, TQ_SLOT(slotAdjustSliders()));
+
+    connect(m_hGradientMaxOutput, TQ_SIGNAL(valueChanged(int)),
+            this, TQ_SLOT(slotAdjustMaxOutputSpinBox(int)));
+
+    connect(m_maxOutput, TQ_SIGNAL(valueChanged (int)),
+            this, TQ_SLOT(slotAdjustSliders()));
+
+    // -------------------------------------------------------------
+    // Bouttons slots.
+
+    connect(m_autoButton, TQ_SIGNAL(clicked()),
+            this, TQ_SLOT(slotAutoLevels()));
+
+    connect(m_resetButton, TQ_SIGNAL(clicked()),
+            this, TQ_SLOT(slotResetCurrentChannel()));
+    
+    connect(m_pickerColorButtonGroup, TQ_SIGNAL(released(int)),
+            this, TQ_SLOT(slotPickerColorButtonActived()));
+            
+}
+
+AdjustLevelDialog::~AdjustLevelDialog()
+{
+    m_histogramWidget->stopHistogramComputation();
+
+    if (m_destinationPreviewData) 
+       delete [] m_destinationPreviewData;
+       
+    delete m_histogramWidget;
+    delete m_levelsHistogramWidget;
+    delete m_levels;
+}
+
+void AdjustLevelDialog::slotPickerColorButtonActived()
+{
+    // Save previous rendering mode and toggle to original image.
+    m_currentPreviewMode = m_previewWidget->getRenderingPreviewMode();
+    m_previewWidget->setRenderingPreviewMode(Digikam::ImageGuideWidget::PreviewOriginalImage);
+}
+
+void AdjustLevelDialog::slotSpotColorChanged(const Digikam::DColor &color)
+{
+    if ( m_pickBlack->isOn() )
+    {
+       // Black tonal levels point.
+       m_levels->levelsBlackToneAdjustByColors(m_channelCB->currentItem(), color);      
+       m_pickBlack->setOn(false);
+    }
+    else if ( m_pickGray->isOn() )
+    {
+       // Gray tonal levels point.
+       m_levels->levelsGrayToneAdjustByColors(m_channelCB->currentItem(), color);      
+       m_pickGray->setOn(false);
+    }
+    else if ( m_pickWhite->isOn() )
+    {
+       // White tonal levels point.
+       m_levels->levelsWhiteToneAdjustByColors(m_channelCB->currentItem(), color);      
+       m_pickWhite->setOn(false);
+    }
+    else
+    {
+       m_levelsHistogramWidget->setHistogramGuideByColor(color);
+       return;
+    }
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+       
+    // restore previous rendering mode.
+    m_previewWidget->setRenderingPreviewMode(m_currentPreviewMode);
+              
+    slotEffect();                
+}
+
+void AdjustLevelDialog::slotColorSelectedFromTarget( const Digikam::DColor &color )
+{
+    m_histogramWidget->setHistogramGuideByColor(color);
+}
+
+void AdjustLevelDialog::slotGammaInputchanged(double val)
+{
+    blockSignals(true);
+    m_levels->setLevelGammaValue(m_channelCB->currentItem(), val);
+    blockSignals(false);
+    slotTimer();
+}
+
+void AdjustLevelDialog::slotAdjustMinInputSpinBox(int val)
+{
+    blockSignals(true);
+
+    if ( val < m_hGradientMaxInput->value() )
+       val = m_hGradientMaxInput->value();
+
+    m_minInput->setValue(m_histoSegments - val);
+    m_hGradientMinInput->setValue( val );
+    m_levels->setLevelLowInputValue(m_channelCB->currentItem(), m_histoSegments - val);
+    blockSignals(false);
+    slotTimer();
+}
+
+void AdjustLevelDialog::slotAdjustMaxInputSpinBox(int val)
+{
+    blockSignals(true);
+
+    if ( val > m_hGradientMinInput->value() )
+       val = m_hGradientMinInput->value();
+
+    m_maxInput->setValue(m_histoSegments - val);
+    m_hGradientMaxInput->setValue( val );
+    m_levels->setLevelHighInputValue(m_channelCB->currentItem(), m_histoSegments - val);
+    blockSignals(false);
+    slotTimer();
+}
+
+void AdjustLevelDialog::slotAdjustMinOutputSpinBox(int val)
+{
+    blockSignals(true);
+
+    if ( val < m_hGradientMaxOutput->value() )
+       val = m_hGradientMaxOutput->value();
+
+    m_minOutput->setValue(m_histoSegments - val);
+    m_hGradientMinOutput->setValue( val );
+    m_levels->setLevelLowOutputValue(m_channelCB->currentItem(), m_histoSegments - val);
+    blockSignals(false);
+    slotTimer();
+}
+
+void AdjustLevelDialog::slotAdjustMaxOutputSpinBox(int val)
+{
+    blockSignals(true);
+
+    if ( val > m_hGradientMinOutput->value() )
+       val = m_hGradientMinOutput->value();
+
+    m_maxOutput->setValue(m_histoSegments - val);
+    m_hGradientMaxOutput->setValue( val );
+    m_levels->setLevelHighOutputValue(m_channelCB->currentItem(), m_histoSegments - val);
+    blockSignals(false);
+    slotTimer();
+}
+
+void AdjustLevelDialog::slotAdjustSliders()
+{
+    adjustSliders(m_minInput->value(), m_gammaInput->value(),
+                  m_maxInput->value(), m_minOutput->value(),
+                  m_maxOutput->value());
+}
+
+void AdjustLevelDialog::adjustSliders(int minIn, double gamIn, int maxIn, int minOut, int maxOut)
+{
+    m_hGradientMinInput->setValue(m_histoSegments - minIn);
+    m_hGradientMaxInput->setValue(m_histoSegments - maxIn);
+    m_gammaInput->setValue(gamIn);
+    m_hGradientMinOutput->setValue(m_histoSegments - minOut);
+    m_hGradientMaxOutput->setValue(m_histoSegments - maxOut);
+}
+
+void AdjustLevelDialog::slotResetCurrentChannel()
+{
+    m_levels->levelsChannelReset(m_channelCB->currentItem());
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+    m_levelsHistogramWidget->reset();
+
+    slotEffect();
+    m_histogramWidget->reset();
+}
+
+void AdjustLevelDialog::slotAutoLevels()
+{
+    // Calculate Auto levels.
+    m_levels->levelsAuto(m_levelsHistogramWidget->m_imageHistogram);
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+
+    slotEffect();
+}
+
+void AdjustLevelDialog::slotEffect()
+{
+    Digikam::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_levels->levelsLutSetup(Digikam::ImageHistogram::AlphaChannel);
+
+    // Apply the lut to the image.
+    m_levels->levelsLutProcess(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 AdjustLevelDialog::finalRendering()
+{
+    kapp->setOverrideCursor( KCursor::waitCursor() );
+    Digikam::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_levels->levelsLutSetup(Digikam::ImageHistogram::AlphaChannel);
+
+    // Apply the lut to the image.
+    m_levels->levelsLutProcess(orgData, desData, w, h);
+
+    iface->putOriginalImage(i18n("Adjust Level"), desData);
+    kapp->restoreOverrideCursor();
+
+    delete [] orgData;
+    delete [] desData;
+    accept();
+}
+
+void AdjustLevelDialog::slotChannelChanged(int channel)
+{
+    switch(channel)
+    {
+       case LuminosityChannel:
+          m_histogramWidget->m_channelType = Digikam::HistogramWidget::ValueHistogram;
+          m_levelsHistogramWidget->m_channelType = Digikam::HistogramWidget::ValueHistogram;
+          m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          break;
+       
+       case RedChannel:
+          m_histogramWidget->m_channelType = Digikam::HistogramWidget::RedChannelHistogram;       
+          m_levelsHistogramWidget->m_channelType = Digikam::HistogramWidget::RedChannelHistogram;
+          m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "red" ) );
+          m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "red" ) );
+          m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "red" ) );
+          m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "red" ) );
+          break;
+
+       case GreenChannel:
+          m_histogramWidget->m_channelType = Digikam::HistogramWidget::GreenChannelHistogram;       
+          m_levelsHistogramWidget->m_channelType = Digikam::HistogramWidget::GreenChannelHistogram;
+          m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "green" ) );
+          m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "green" ) );
+          m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "green" ) );
+          m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "green" ) );
+          break;
+
+       case BlueChannel:
+          m_histogramWidget->m_channelType = Digikam::HistogramWidget::BlueChannelHistogram;
+          m_levelsHistogramWidget->m_channelType = Digikam::HistogramWidget::BlueChannelHistogram;
+          m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "blue" ) );
+          m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "blue" ) );
+          m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "blue" ) );
+          m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "blue" ) );
+          break;
+
+       case AlphaChannel:
+          m_histogramWidget->m_channelType = Digikam::HistogramWidget::AlphaChannelHistogram;       
+          m_levelsHistogramWidget->m_channelType = Digikam::HistogramWidget::AlphaChannelHistogram;
+          m_hGradientMinInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMaxInput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMinOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          m_hGradientMaxOutput->setColors( TQColor( "black" ), TQColor( "white" ) );
+          break;
+    }
+
+    adjustSliders(m_levels->getLevelLowInputValue(channel),
+                  m_levels->getLevelGammaValue(channel),
+                  m_levels->getLevelHighInputValue(channel),
+                  m_levels->getLevelLowOutputValue(channel),
+                  m_levels->getLevelHighOutputValue(channel));
+
+    m_levelsHistogramWidget->repaint(false);
+    m_histogramWidget->repaint(false);    
+}
+
+void AdjustLevelDialog::slotScaleChanged(int scale)
+{
+    m_levelsHistogramWidget->m_scaleType = scale;
+    m_histogramWidget->m_scaleType       = scale;
+    m_histogramWidget->repaint(false);
+    m_levelsHistogramWidget->repaint(false);
+}
+
+void AdjustLevelDialog::readUserSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("adjustlevels Tool Dialog");
+
+    m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0));    // Luminosity.
+    m_scaleBG->setButton(config->readNumEntry("Histogram Scale", Digikam::HistogramWidget::LogScaleHistogram));
+
+    for (int i = 0 ; i < 5 ; i++)
+    {
+        bool sb        = m_originalImage.sixteenBit();
+        int max        = sb ? 65535 : 255;
+        double gamma   = config->readDoubleNumEntry(TQString("GammaChannel%1").arg(i), 1.0);
+        int lowInput   = config->readNumEntry(TQString("LowInputChannel%1").arg(i), 0);
+        int lowOutput  = config->readNumEntry(TQString("LowOutputChannel%1").arg(i), 0);
+        int highInput  = config->readNumEntry(TQString("HighInputChannel%1").arg(i), max);
+        int highOutput = config->readNumEntry(TQString("HighOutputChannel%1").arg(i), max);
+    
+        m_levels->setLevelGammaValue(i, gamma);
+        m_levels->setLevelLowInputValue(i, sb ? lowInput*255 : lowInput);
+        m_levels->setLevelHighInputValue(i, sb ? highInput*255 : highInput);
+        m_levels->setLevelLowOutputValue(i, sb ? lowOutput*255 : lowOutput);
+        m_levels->setLevelHighOutputValue(i, sb ? highOutput*255 : highOutput);
+    }
+
+    m_levelsHistogramWidget->reset();
+    m_histogramWidget->reset();
+    slotChannelChanged(m_channelCB->currentItem());
+    slotScaleChanged(m_scaleBG->selectedId());
+
+    // This is mandatory here to set spinbox values because slot connections 
+    // can be not set completely at plugin startup.
+    m_minInput->setValue(m_levels->getLevelLowInputValue(m_channelCB->currentItem()));
+    m_minOutput->setValue(m_levels->getLevelLowOutputValue(m_channelCB->currentItem()));
+    m_maxInput->setValue(m_levels->getLevelHighInputValue(m_channelCB->currentItem()));
+    m_maxOutput->setValue(m_levels->getLevelHighOutputValue(m_channelCB->currentItem()));
+}
+
+void AdjustLevelDialog::writeUserSettings()
+{
+    TDEConfig* config = kapp->config();
+    config->setGroup("adjustlevels Tool Dialog");
+    config->writeEntry("Histogram Channel", m_channelCB->currentItem());
+    config->writeEntry("Histogram Scale", m_scaleBG->selectedId());
+
+    for (int i = 0 ; i < 5 ; i++)
+    {
+        bool sb        = m_originalImage.sixteenBit();
+        double gamma   = m_levels->getLevelGammaValue(i);
+        int lowInput   = m_levels->getLevelLowInputValue(i);
+        int lowOutput  = m_levels->getLevelLowOutputValue(i);
+        int highInput  = m_levels->getLevelHighInputValue(i);
+        int highOutput = m_levels->getLevelHighOutputValue(i);
+
+        config->writeEntry(TQString("GammaChannel%1").arg(i), gamma);
+        config->writeEntry(TQString("LowInputChannel%1").arg(i), sb ? lowInput/255 : lowInput);
+        config->writeEntry(TQString("LowOutputChannel%1").arg(i), sb ? lowOutput/255 : lowOutput);
+        config->writeEntry(TQString("HighInputChannel%1").arg(i), sb ? highInput/255 : highInput);
+        config->writeEntry(TQString("HighOutputChannel%1").arg(i), sb ? highOutput/255 : highOutput);
+    }
+
+    config->sync();
+}
+
+void AdjustLevelDialog::resetValues()
+{
+    for (int channel = 0 ; channel < 5 ; ++channel)
+       m_levels->levelsChannelReset(channel);
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+    m_levelsHistogramWidget->reset();
+    m_histogramWidget->reset();
+}
+
+// Load all settings.
+void AdjustLevelDialog::slotUser3()
+{
+    KURL loadLevelsFile;
+
+    loadLevelsFile = KFileDialog::getOpenURL(TDEGlobalSettings::documentPath(),
+                                             TQString( "*" ), this,
+                                             TQString( i18n("Select Gimp Levels File to Load")) );
+    if( loadLevelsFile.isEmpty() )
+       return;
+
+    if ( m_levels->loadLevelsFromGimpLevelsFile( loadLevelsFile ) == false )
+    {
+       KMessageBox::error(this, i18n("Cannot load from the Gimp levels text file."));
+       return;
+    }
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+}
+
+// Save all settings.
+void AdjustLevelDialog::slotUser2()
+{
+    KURL saveLevelsFile;
+
+    saveLevelsFile = KFileDialog::getSaveURL(TDEGlobalSettings::documentPath(),
+                                             TQString( "*" ), this,
+                                             TQString( i18n("Gimp Levels File to Save")) );
+    if( saveLevelsFile.isEmpty() )
+       return;
+
+    if ( m_levels->saveLevelsToGimpLevelsFile( saveLevelsFile ) == false )
+    {
+       KMessageBox::error(this, i18n("Cannot save to the Gimp levels text file."));
+       return;
+    }
+
+    // Refresh the current levels config.
+    slotChannelChanged(m_channelCB->currentItem());
+}
+
+// See B.K.O #146636: use event filter with all level slider to display a
+// guide over level histogram.
+bool AdjustLevelDialog::eventFilter(TQObject *obj, TQEvent *ev)
+{
+    if ( obj == m_hGradientMinInput )
+    {
+        if ( ev->type() == TQEvent::MouseButtonPress)
+        {
+            connect(m_minInput, TQ_SIGNAL(valueChanged(int)),
+                    this, TQ_SLOT(slotShowHistogramGuide(int)));
+            
+            return false;
+        }
+        if ( ev->type() == TQEvent::MouseButtonRelease)
+        {
+            disconnect(m_minInput, TQ_SIGNAL(valueChanged(int)),
+                       this, TQ_SLOT(slotShowHistogramGuide(int)));
+
+            m_levelsHistogramWidget->reset();
+            return false;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    if ( obj == m_hGradientMaxInput )
+    {
+        if ( ev->type() == TQEvent::MouseButtonPress)
+        {
+            connect(m_maxInput, TQ_SIGNAL(valueChanged(int)),
+                    this, TQ_SLOT(slotShowHistogramGuide(int)));
+            
+            return false;
+        }
+        if ( ev->type() == TQEvent::MouseButtonRelease)
+        {
+            disconnect(m_maxInput, TQ_SIGNAL(valueChanged(int)),
+                       this, TQ_SLOT(slotShowHistogramGuide(int)));
+
+            m_levelsHistogramWidget->reset();
+            return false;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    if ( obj == m_hGradientMinOutput )
+    {
+        if ( ev->type() == TQEvent::MouseButtonPress)
+        {
+            connect(m_minOutput, TQ_SIGNAL(valueChanged(int)),
+                    this, TQ_SLOT(slotShowHistogramGuide(int)));
+            
+            return false;
+        }
+        if ( ev->type() == TQEvent::MouseButtonRelease)
+        {
+            disconnect(m_minOutput, TQ_SIGNAL(valueChanged(int)),
+                       this, TQ_SLOT(slotShowHistogramGuide(int)));
+
+            m_levelsHistogramWidget->reset();
+            return false;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    if ( obj == m_hGradientMaxOutput )
+    {
+        if ( ev->type() == TQEvent::MouseButtonPress)
+        {
+            connect(m_maxOutput, TQ_SIGNAL(valueChanged(int)),
+                    this, TQ_SLOT(slotShowHistogramGuide(int)));
+            
+            return false;
+        }
+        if ( ev->type() == TQEvent::MouseButtonRelease)
+        {
+            disconnect(m_maxOutput, TQ_SIGNAL(valueChanged(int)),
+                       this, TQ_SLOT(slotShowHistogramGuide(int)));
+
+            m_levelsHistogramWidget->reset();
+            return false;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    else
+    {
+        // pass the event on to the parent class
+        return KDialogBase::eventFilter(obj, ev);
+    }
+}
+
+void AdjustLevelDialog::slotShowHistogramGuide(int v)
+{
+    Digikam::DColor color(v, v, v, v, m_originalImage.sixteenBit());
+    m_levelsHistogramWidget->setHistogramGuideByColor(color);
+}
+
+}  // NameSpace DigikamAdjustLevelsImagesPlugin