/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2005-02-09
 * Description : a plugin to apply Blur FX to images
 * 
 * Copyright 2005-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright 2006-2008 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * 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 <tqlabel.h>
#include <tqwhatsthis.h>
#include <tqlayout.h>
#include <tqslider.h>
#include <tqimage.h>
#include <tqcombobox.h>
#include <tqdatetime.h> 

// KDE includes.

#include <kconfig.h>
#include <klocale.h>
#include <kaboutdata.h>
#include <kapplication.h>
#include <knuminput.h>

// Local includes.

#include "version.h"
#include "ddebug.h"
#include "imageiface.h"
#include "imagewidget.h"
#include "blurfx.h"
#include "imageeffect_blurfx.h"
#include "imageeffect_blurfx.moc"

namespace DigikamBlurFXImagesPlugin
{

ImageEffect_BlurFX::ImageEffect_BlurFX(TQWidget* parent)
                  : Digikam::CtrlPanelDlg(parent, i18n("Apply Blurring Special Effect to Photograph"),
                                          "blurfx", false, false, true,
                                          Digikam::ImagePannelWidget::SeparateViewAll)
{
    TQString whatsThis;

    KAboutData* about = new KAboutData("digikam",
                                       I18N_NOOP("Blur Effects"), 
                                       digikam_version,
                                       I18N_NOOP("A digiKam image plugin to apply blurring special effect "
                                       "to an image."),
                                       KAboutData::License_GPL,
                                       "(c) 2005, Gilles Caulier\n"
                                       "(c) 2006-2008, Gilles Caulier and Marcel Wiesweg",
                                       0,
                                       "http://www.digikam.org");

    about->addAuthor("Gilles Caulier", I18N_NOOP("Author and maintainer"),
                     "caulier dot gilles at gmail dot com");

    about->addAuthor("Pieter Z. Voloshyn", I18N_NOOP("Blurring algorithms"), 
                     "pieter dot voloshyn at gmail dot com"); 

    about->addAuthor("Marcel Wiesweg", I18N_NOOP("Developer"),
                     "marcel dot wiesweg at gmx dot de");

    setAboutData(about);

    // -------------------------------------------------------------

    TQWidget *gboxSettings     = new TQWidget(m_imagePreviewWidget);
    TQGridLayout* gridSettings = new TQGridLayout( gboxSettings, 5, 1, 0, spacingHint());
    
    m_effectTypeLabel = new TQLabel(i18n("Type:"), gboxSettings);
    
    m_effectType = new TQComboBox( false, gboxSettings );
    m_effectType->insertItem( i18n("Zoom Blur") );
    m_effectType->insertItem( i18n("Radial Blur") );
    m_effectType->insertItem( i18n("Far Blur") );
    m_effectType->insertItem( i18n("Motion Blur") );
    m_effectType->insertItem( i18n("Softener Blur") );
    m_effectType->insertItem( i18n("Skake Blur") );
    m_effectType->insertItem( i18n("Focus Blur") );
    m_effectType->insertItem( i18n("Smart Blur") );
    m_effectType->insertItem( i18n("Frost Glass") );
    m_effectType->insertItem( i18n("Mosaic") );
    TQWhatsThis::add( m_effectType, i18n("<p>Select the blurring effect to apply to the image.<p>"
                                        "<b>Zoom Blur</b>:  blurs the image along radial lines starting from "
                                        "a specified center point. This simulates the blur of a zooming camera.<p>"
                                        "<b>Radial Blur</b>: blurs the image by rotating the pixels around "
                                        "the specified center point. This simulates the blur of a rotating camera.<p>"
                                        "<b>Far Blur</b>: blurs the image by using far pixels. This simulates the blur "
                                        "of an unfocalized camera lens.<p>"
                                        "<b>Motion Blur</b>: blurs the image by moving the pixels horizontally. "
                                        "This simulates the blur of a linear moving camera.<p>"
                                        "<b>Softener Blur</b>: blurs the image softly in dark tones and hardly in light "
                                        "tones. This gives images a dreamy and glossy soft focus effect. It's ideal "
                                        "for creating romantic portraits, glamour photographs, or giving images a warm "
                                        "and subtle glow.<p>"
                                        "<b>Skake Blur</b>: blurs the image by skaking randomly the pixels. "
                                        "This simulates the blur of a random moving camera.<p>"
                                        "<b>Focus Blur</b>: blurs the image corners to reproduce the astigmatism distortion "
                                        "of a lens.<p>"
                                        "<b>Smart Blur</b>: finds the edges of color in your image and blurs them without "
                                        "muddying the rest of the image.<p>"
                                        "<b>Frost Glass</b>: blurs the image by randomly disperse light coming through "
                                        "a frosted glass.<p>"
                                        "<b>Mosaic</b>: divides the photograph into rectangular cells and then "
                                        "recreates it by filling those cells with average pixel value."));
    gridSettings->addMultiCellWidget(m_effectTypeLabel, 0, 0, 0, 1);
    gridSettings->addMultiCellWidget(m_effectType, 1, 1, 0, 1);
                                                  
    m_distanceLabel = new TQLabel(i18n("Distance:"), gboxSettings);
    m_distanceInput = new KIntNumInput(gboxSettings);
    m_distanceInput->setRange(0, 100, 1, true);    
    TQWhatsThis::add( m_distanceInput, i18n("<p>Set here the blur distance in pixels."));
    
    gridSettings->addMultiCellWidget(m_distanceLabel, 2, 2, 0, 1);
    gridSettings->addMultiCellWidget(m_distanceInput, 3, 3, 0, 1);
        
    m_levelLabel = new TQLabel(i18n("Level:"), gboxSettings);
    m_levelInput = new KIntNumInput(gboxSettings);
    m_levelInput->setRange(0, 360, 1, true);
    TQWhatsThis::add( m_levelInput, i18n("<p>This value controls the level to use with the current effect."));  
    
    gridSettings->addMultiCellWidget(m_levelLabel, 4, 4, 0, 1);
    gridSettings->addMultiCellWidget(m_levelInput, 5, 5, 0, 1);
    
    m_imagePreviewWidget->setUserAreaWidget(gboxSettings);
        
    // -------------------------------------------------------------
    
    connect(m_effectType, TQT_SIGNAL(activated(int)),
            this, TQT_SLOT(slotEffectTypeChanged(int)));
    
    connect(m_distanceInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));            
    
    connect(m_levelInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));            
}

ImageEffect_BlurFX::~ImageEffect_BlurFX()
{
}

void ImageEffect_BlurFX::renderingFinished(void)
{

    m_effectTypeLabel->setEnabled(true);
    m_effectType->setEnabled(true);
    m_distanceInput->setEnabled(true);
    m_distanceLabel->setEnabled(true);
    
    switch (m_effectType->currentItem())
       {
       case BlurFX::ZoomBlur:
       case BlurFX::RadialBlur:
       case BlurFX::FarBlur:
       case BlurFX::ShakeBlur: 
       case BlurFX::FrostGlass: 
       case BlurFX::Mosaic: 
          break;

       case BlurFX::MotionBlur:
       case BlurFX::FocusBlur:
       case BlurFX::SmartBlur:
          m_levelInput->setEnabled(true);
          m_levelLabel->setEnabled(true);
          break;

       case BlurFX::SoftenerBlur:
          m_distanceInput->setEnabled(false);
          m_distanceLabel->setEnabled(false);
          break;
       }
}

void ImageEffect_BlurFX::readUserSettings()
{
    KConfig* config = kapp->config();
    config->setGroup("blurfx Tool Dialog");
    m_effectType->blockSignals(true);
    m_distanceInput->blockSignals(true);
    m_levelInput->blockSignals(true);
    m_effectType->setCurrentItem(config->readNumEntry("EffectType", BlurFX::ZoomBlur));
    m_distanceInput->setValue(config->readNumEntry("DistanceAjustment", 3));
    m_levelInput->setValue(config->readNumEntry("LevelAjustment", 128));
    m_effectType->blockSignals(false);
    m_distanceInput->blockSignals(false);
    m_levelInput->blockSignals(false);
}

void ImageEffect_BlurFX::writeUserSettings()
{
    KConfig* config = kapp->config();
    config->setGroup("blurfx Tool Dialog");
    config->writeEntry("EffectType", m_effectType->currentItem());
    config->writeEntry("DistanceAjustment", m_distanceInput->value());
    config->writeEntry("LevelAjustment", m_levelInput->value());
    config->sync();
}

void ImageEffect_BlurFX::resetValues()
{
       m_effectType->setCurrentItem(BlurFX::ZoomBlur);
       slotEffectTypeChanged(BlurFX::ZoomBlur);
} 

void ImageEffect_BlurFX::slotEffectTypeChanged(int type)
{
    m_distanceInput->setEnabled(true);
    m_distanceLabel->setEnabled(true);
    
    m_distanceInput->blockSignals(true);
    m_levelInput->blockSignals(true);
    m_distanceInput->setRange(0, 200, 1, true);
    m_distanceInput->setValue(100);
    m_levelInput->setRange(0, 360, 1, true);
    m_levelInput->setValue(45);
    
    m_levelInput->setEnabled(false);
    m_levelLabel->setEnabled(false);
          
    switch (type)
       {
       case BlurFX::ZoomBlur:
          break;
       
       case BlurFX::RadialBlur:
       case BlurFX::FrostGlass: 
          m_distanceInput->setRange(0, 10, 1, true);
          m_distanceInput->setValue(3);
          break;
          
       case BlurFX::FarBlur:
          m_distanceInput->setRange(0, 20, 1, true);
          m_distanceInput->setMaxValue(20);
          m_distanceInput->setValue(10);
          break;
       
       case BlurFX::MotionBlur:
       case BlurFX::FocusBlur:
          m_distanceInput->setRange(0, 100, 1, true);
          m_distanceInput->setValue(20);
          m_levelInput->setEnabled(true);
          m_levelLabel->setEnabled(true);
          break;

       case BlurFX::SoftenerBlur:
          m_distanceInput->setEnabled(false);
          m_distanceLabel->setEnabled(false);
          break;
          
       case BlurFX::ShakeBlur:   
          m_distanceInput->setRange(0, 100, 1, true);
          m_distanceInput->setValue(20);
          break;
       
       case BlurFX::SmartBlur:
          m_distanceInput->setRange(0, 20, 1, true);
          m_distanceInput->setValue(3);
          m_levelInput->setEnabled(true);
          m_levelLabel->setEnabled(true);
          m_levelInput->setRange(0, 255, 1, true);
          m_levelInput->setValue(128);
          break;
       
       case BlurFX::Mosaic: 
          m_distanceInput->setRange(0, 50, 1, true);
          m_distanceInput->setValue(3);
          break;
       }

    m_distanceInput->blockSignals(false);
    m_levelInput->blockSignals(false);
       
    slotEffect();
}

void ImageEffect_BlurFX::prepareEffect()
{
    m_effectTypeLabel->setEnabled(false);
    m_effectType->setEnabled(false);
    m_distanceInput->setEnabled(false);
    m_distanceLabel->setEnabled(false);
    m_levelInput->setEnabled(false);
    m_levelLabel->setEnabled(false);

    Digikam::DImg image;

    switch (m_effectType->currentItem())
       {
       case BlurFX::ZoomBlur:
       case BlurFX::RadialBlur:
       case BlurFX::FocusBlur:
            {
            Digikam::ImageIface iface(0, 0);
            image = *iface.getOriginalImg();
            break;
            }

       case BlurFX::FarBlur:
       case BlurFX::MotionBlur:
       case BlurFX::SoftenerBlur:
       case BlurFX::ShakeBlur: 
       case BlurFX::SmartBlur:
       case BlurFX::FrostGlass: 
       case BlurFX::Mosaic: 
           image = m_imagePreviewWidget->getOriginalRegionImage();
           break;
       }

    int t = m_effectType->currentItem();
    int d = m_distanceInput->value();
    int l = m_levelInput->value();

    m_threadedFilter = dynamic_cast<Digikam::DImgThreadedFilter *>(new BlurFX(&image, this, t, d, l));
}

void ImageEffect_BlurFX::prepareFinal()
{
    m_effectTypeLabel->setEnabled(false);
    m_effectType->setEnabled(false);
    m_distanceInput->setEnabled(false);
    m_distanceLabel->setEnabled(false);
    m_levelInput->setEnabled(false);
    m_levelLabel->setEnabled(false);

    int t = m_effectType->currentItem();
    int d = m_distanceInput->value();
    int l = m_levelInput->value();

    Digikam::ImageIface iface(0, 0);
    m_threadedFilter = dynamic_cast<Digikam::DImgThreadedFilter *>(new BlurFX(iface.getOriginalImg(), this, t, d, l));
}

void ImageEffect_BlurFX::putPreviewData(void)
{
    switch (m_effectType->currentItem())
        {
        case BlurFX::ZoomBlur:
        case BlurFX::RadialBlur:
        case BlurFX::FocusBlur:
            {
            TQRect pRect    = m_imagePreviewWidget->getOriginalImageRegionToRender();
            Digikam::DImg destImg = m_threadedFilter->getTargetImage().copy(pRect);
            m_imagePreviewWidget->setPreviewImage(destImg);
            break;
            }
        case BlurFX::FarBlur:
        case BlurFX::MotionBlur:
        case BlurFX::SoftenerBlur:
        case BlurFX::ShakeBlur: 
        case BlurFX::SmartBlur:
        case BlurFX::FrostGlass: 
        case BlurFX::Mosaic: 
            m_imagePreviewWidget->setPreviewImage(m_threadedFilter->getTargetImage());
            break;
        }
}

void ImageEffect_BlurFX::putFinalData(void)
{
    Digikam::ImageIface iface(0, 0);

    iface.putOriginalImage(i18n("Blur Effects"),
                           m_threadedFilter->getTargetImage().bits());
}

}  // NameSpace DigikamBlurFXImagesPlugin

