/* ============================================================
 *
 * 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 <tqdatetime.h>
#include <tqimage.h>
#include <tqlabel.h>
#include <tqlayout.h>
#include <tqslider.h>
#include <tqwhatsthis.h>

// KDE includes.

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

// LibKDcraw includes.

#include <libkdcraw/rnuminput.h>
#include <libkdcraw/rcombobox.h>

// Local includes.

#include "daboutdata.h"
#include "ddebug.h"
#include "imageiface.h"
#include "imagepanelwidget.h"
#include "editortoolsettings.h"
#include "blurfx.h"
#include "blurfxtool.h"
#include "blurfxtool.moc"

using namespace KDcrawIface;
using namespace Digikam;

namespace DigikamBlurFXImagesPlugin
{

BlurFXTool::BlurFXTool(TQObject* parent)
          : EditorToolThreaded(parent)
{
    setName("blurfx");
    setToolName(i18n("Blur FX"));
    setToolIcon(SmallIcon("blurfx"));

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

    m_gboxSettings = new EditorToolSettings(EditorToolSettings::Default|
                                            EditorToolSettings::Ok|
                                            EditorToolSettings::Cancel|
                                            EditorToolSettings::Try,
                                            EditorToolSettings::PanIcon);
    TQGridLayout* grid = new TQGridLayout( m_gboxSettings->plainPage(), 6, 1);

    m_effectTypeLabel = new TQLabel(i18n("Type:"), m_gboxSettings->plainPage());

    m_effectType = new RComboBox(m_gboxSettings->plainPage());
    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"));
    m_effectType->setDefaultItem(BlurFX::ZoomBlur);
    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."));

    m_distanceLabel = new TQLabel(i18n("Distance:"), m_gboxSettings->plainPage());
    m_distanceInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_distanceInput->setRange(0, 100, 1);
    m_distanceInput->setDefaultValue(3);
    TQWhatsThis::add( m_distanceInput, i18n("<p>Set here the blur distance in pixels."));

    m_levelLabel = new TQLabel(i18n("Level:"), m_gboxSettings->plainPage());
    m_levelInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_levelInput->setRange(0, 360, 1);
    m_levelInput->setDefaultValue(128);
    TQWhatsThis::add( m_levelInput, i18n("<p>This value controls the level to use with the current effect."));

    grid->addMultiCellWidget(m_effectTypeLabel, 0, 0, 0, 1);
    grid->addMultiCellWidget(m_effectType,      1, 1, 0, 1);
    grid->addMultiCellWidget(m_distanceLabel,   2, 2, 0, 1);
    grid->addMultiCellWidget(m_distanceInput,   3, 3, 0, 1);
    grid->addMultiCellWidget(m_levelLabel,      4, 4, 0, 1);
    grid->addMultiCellWidget(m_levelInput,      5, 5, 0, 1);
    grid->setRowStretch(6, 10);
    grid->setMargin(m_gboxSettings->spacingHint());
    grid->setSpacing(m_gboxSettings->spacingHint());

    setToolSettings(m_gboxSettings);

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

    m_previewWidget = new ImagePanelWidget(470, 350, "blurfx Tool", m_gboxSettings->panIconView());

    setToolView(m_previewWidget);
    init();

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

    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()));
}

BlurFXTool::~BlurFXTool()
{
}

void BlurFXTool::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 BlurFXTool::readSettings()
{
    KConfig* config = kapp->config();
    config->setGroup("blurfx Tool");
    m_effectType->blockSignals(true);
    m_distanceInput->blockSignals(true);
    m_levelInput->blockSignals(true);

    m_effectType->setCurrentItem(config->readNumEntry("EffectType", m_effectType->defaultItem()));
    m_distanceInput->setValue(config->readNumEntry("DistanceAjustment", m_distanceInput->defaultValue()));
    m_levelInput->setValue(config->readNumEntry("LevelAjustment", m_levelInput->defaultValue()));

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

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

void BlurFXTool::slotResetSettings()
{
       m_effectType->blockSignals(true);
       m_distanceInput->blockSignals(true);
       m_levelInput->blockSignals(true);

       m_effectType->slotReset();
       m_distanceInput->slotReset();
       m_levelInput->slotReset();

       m_effectType->blockSignals(false);
       m_distanceInput->blockSignals(false);
       m_levelInput->blockSignals(false);

       slotEffectTypeChanged(m_effectType->defaultItem());
}

void BlurFXTool::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);
    m_distanceInput->setValue(100);
    m_levelInput->setRange(0, 360, 1);
    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);
          m_distanceInput->setValue(3);
          break;

       case BlurFX::FarBlur:
          m_distanceInput->setRange(0, 20, 1);
          m_distanceInput->input()->setMaxValue(20);
          m_distanceInput->setValue(10);
          break;

       case BlurFX::MotionBlur:
       case BlurFX::FocusBlur:
          m_distanceInput->setRange(0, 100, 1);
          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);
          m_distanceInput->setValue(20);
          break;

       case BlurFX::SmartBlur:
          m_distanceInput->setRange(0, 20, 1);
          m_distanceInput->setValue(3);
          m_levelInput->setEnabled(true);
          m_levelLabel->setEnabled(true);
          m_levelInput->setRange(0, 255, 1);
          m_levelInput->setValue(128);
          break;

       case BlurFX::Mosaic:
          m_distanceInput->setRange(0, 50, 1);
          m_distanceInput->setValue(3);
          break;
    }

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

    slotEffect();
}

void BlurFXTool::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);

    DImg image;

    switch (m_effectType->currentItem())
    {
        case BlurFX::ZoomBlur:
        case BlurFX::RadialBlur:
        case BlurFX::FocusBlur:
        {
            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_previewWidget->getOriginalRegionImage();
           break;
    }

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

    setFilter(dynamic_cast<DImgThreadedFilter*>(new BlurFX(&image, this, t, d, l)));
}

void BlurFXTool::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();

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

void BlurFXTool::putPreviewData()
{
    switch (m_effectType->currentItem())
    {
        case BlurFX::ZoomBlur:
        case BlurFX::RadialBlur:
        case BlurFX::FocusBlur:
        {
            TQRect pRect    = m_previewWidget->getOriginalImageRegionToRender();
            DImg destImg = filter()->getTargetImage().copy(pRect);
            m_previewWidget->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_previewWidget->setPreviewImage(filter()->getTargetImage());
            break;
    }
}

void BlurFXTool::putFinalData()
{
    ImageIface iface(0, 0);
    iface.putOriginalImage(i18n("Blur Effects"), filter()->getTargetImage().bits());
}

}  // NameSpace DigikamBlurFXImagesPlugin
