/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2005-02-11
 * Description : a plugin to apply Distortion FX to an image.
 *
 * Copyright (C) 2005-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C) 2006-2008 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * Original Distortion algorithms copyrighted 2004-2005 by
 * Pieter Z. Voloshyn <pieter dot voloshyn at gmail dot com>.
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */

// TQt includes.

#include <tqframe.h>
#include <tqimage.h>
#include <tqlabel.h>
#include <tqlayout.h>
#include <tqspinbox.h>
#include <tqwhatsthis.h>

// KDE includes.

#include <kaboutdata.h>
#include <kapplication.h>
#include <tdeconfig.h>
#include <kcursor.h>
#include <khelpmenu.h>
#include <kiconloader.h>
#include <klocale.h>
#include <kprogress.h>
#include <kstandarddirs.h>

// LibKDcraw includes.

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

// Local includes.

#include "daboutdata.h"
#include "ddebug.h"
#include "dimg.h"
#include "editortoolsettings.h"
#include "imageiface.h"
#include "imagewidget.h"
#include "distortionfx.h"
#include "distortionfxtool.h"
#include "distortionfxtool.moc"

using namespace KDcrawIface;
using namespace Digikam;

namespace DigikamDistortionFXImagesPlugin
{

DistortionFXTool::DistortionFXTool(TQObject* parent)
                : EditorToolThreaded(parent)
{
    setName("distortionfx");
    setToolName(i18n("Distortion Effects"));
    setToolIcon(SmallIcon("distortionfx"));

    m_previewWidget = new ImageWidget("distortionfx Tool", 0,
                                      i18n("<p>This is the preview of the distortion effect "
                                           "applied to the photograph."),
                                      false, ImageGuideWidget::HVGuideMode);

    setToolView(m_previewWidget);

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

    m_gboxSettings = new EditorToolSettings(EditorToolSettings::Default|
                                            EditorToolSettings::Ok|
                                            EditorToolSettings::Cancel,
                                            EditorToolSettings::ColorGuide);

    TQGridLayout* gridSettings = new TQGridLayout(m_gboxSettings->plainPage(), 7, 2);

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

    m_effectType = new RComboBox(m_gboxSettings->plainPage());
    m_effectType->insertItem(i18n("Fish Eyes"));
    m_effectType->insertItem(i18n("Twirl"));
    m_effectType->insertItem(i18n("Cylindrical Hor."));
    m_effectType->insertItem(i18n("Cylindrical Vert."));
    m_effectType->insertItem(i18n("Cylindrical H/V."));
    m_effectType->insertItem(i18n("Caricature"));
    m_effectType->insertItem(i18n("Multiple Corners"));
    m_effectType->insertItem(i18n("Waves Hor."));
    m_effectType->insertItem(i18n("Waves Vert."));
    m_effectType->insertItem(i18n("Block Waves 1"));
    m_effectType->insertItem(i18n("Block Waves 2"));
    m_effectType->insertItem(i18n("Circular Waves 1"));
    m_effectType->insertItem(i18n("Circular Waves 2"));
    m_effectType->insertItem(i18n("Polar Coordinates"));
    m_effectType->insertItem(i18n("Unpolar Coordinates"));
    m_effectType->insertItem(i18n("Tile"));
    m_effectType->setDefaultItem(DistortionFX::FishEye);
    TQWhatsThis::add( m_effectType, i18n("<p>Here, select the type of effect to apply to the image.<p>"
                                        "<b>Fish Eyes</b>: warps the photograph around a 3D spherical shape to "
                                        "reproduce the common photograph 'Fish Eyes' effect.<p>"
                                        "<b>Twirl</b>: spins the photograph to produce a Twirl pattern.<p>"
                                        "<b>Cylinder Hor.</b>: warps the photograph around a horizontal cylinder.<p>"
                                        "<b>Cylinder Vert.</b>: warps the photograph around a vertical cylinder.<p>"
                                        "<b>Cylinder H/V.</b>: warps the photograph around 2 cylinders, vertical "
                                        "and horizontal.<p>"
                                        "<b>Caricature</b>: distorts the photograph with the 'Fish Eyes' effect inverted.<p>"
                                        "<b>Multiple Corners</b>: splits the photograph like a multiple corners pattern.<p>"
                                        "<b>Waves Horizontal</b>: distorts the photograph with horizontal waves.<p>"
                                        "<b>Waves Vertical</b>: distorts the photograph with vertical waves.<p>"
                                        "<b>Block Waves 1</b>: divides the image into cells and makes it look as "
                                        "if it is being viewed through glass blocks.<p>"
                                        "<b>Block Waves 2</b>: like Block Waves 1 but with another version "
                                        "of glass blocks distortion.<p>"
                                        "<b>Circular Waves 1</b>: distorts the photograph with circular waves.<p>"
                                        "<b>Circular Waves 2</b>: another variation of the Circular Waves effect.<p>"
                                        "<b>Polar Coordinates</b>: converts the photograph from rectangular "
                                        "to polar coordinates.<p>"
                                        "<b>Unpolar Coordinates</b>: the Polar Coordinates effect inverted.<p>"
                                        "<b>Tile</b>: splits the photograph into square blocks and moves "
                                        "them randomly inside the image.<p>"
                                        ));

    m_levelLabel = new TQLabel(i18n("Level:"), m_gboxSettings->plainPage());
    m_levelInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_levelInput->setRange(0, 100, 1);
    m_levelInput->setDefaultValue(50);
    TQWhatsThis::add( m_levelInput, i18n("<p>Set here the level of the effect."));


    m_iterationLabel = new TQLabel(i18n("Iteration:"), m_gboxSettings->plainPage());
    m_iterationInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_iterationInput->setRange(0, 100, 1);
    m_iterationInput->setDefaultValue(10);
    TQWhatsThis::add( m_iterationInput, i18n("<p>This value controls the iterations to use for Waves, "
                                            "Tile, and Neon effects."));

    gridSettings->addMultiCellWidget(m_effectTypeLabel,     0, 0, 0, 1);
    gridSettings->addMultiCellWidget(m_effectType,          1, 1, 0, 1);
    gridSettings->addMultiCellWidget(m_levelLabel,          2, 2, 0, 1);
    gridSettings->addMultiCellWidget(m_levelInput,          3, 3, 0, 1);
    gridSettings->addMultiCellWidget(m_iterationLabel,      4, 4, 0, 1);
    gridSettings->addMultiCellWidget(m_iterationInput,      5, 5, 0, 1);
    gridSettings->setRowStretch(6, 10);

    setToolSettings(m_gboxSettings);
    init();

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

    connect(m_effectType, TQT_SIGNAL(activated(int)),
            this, TQT_SLOT(slotEffectTypeChanged(int)));

    connect(m_levelInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));

    connect(m_iterationInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));

    connect(m_gboxSettings, TQT_SIGNAL(signalColorGuideChanged()),
            this, TQT_SLOT(slotColorGuideChanged()));
}

DistortionFXTool::~DistortionFXTool()
{
}

void DistortionFXTool::slotColorGuideChanged()
{
    m_previewWidget->slotChangeGuideColor(m_gboxSettings->guideColor());
    m_previewWidget->slotChangeGuideSize(m_gboxSettings->guideSize());
}

void DistortionFXTool::renderingFinished()
{
    m_effectTypeLabel->setEnabled(true);
    m_effectType->setEnabled(true);
    m_levelInput->setEnabled(true);
    m_levelLabel->setEnabled(true);
    m_iterationInput->setEnabled(true);
    m_iterationLabel->setEnabled(true);

    switch (m_effectType->currentItem())
    {
        case DistortionFX::FishEye:
        case DistortionFX::Twirl:
        case DistortionFX::CilindricalHor:
        case DistortionFX::CilindricalVert:
        case DistortionFX::CilindricalHV:
        case DistortionFX::Caricature:
        case DistortionFX::MultipleCorners:
            break;

        case DistortionFX::PolarCoordinates:
        case DistortionFX::UnpolarCoordinates:
            m_levelInput->setEnabled(false);
            m_levelLabel->setEnabled(false);
            break;

        case DistortionFX::WavesHorizontal:
        case DistortionFX::WavesVertical:
        case DistortionFX::BlockWaves1:
        case DistortionFX::BlockWaves2:
        case DistortionFX::CircularWaves1:
        case DistortionFX::CircularWaves2:
        case DistortionFX::Tile:
            m_iterationInput->setEnabled(true);
            m_iterationLabel->setEnabled(true);
            break;
    }
}

void DistortionFXTool::readSettings(void)
{
    TDEConfig *config = kapp->config();
    config->setGroup("distortionfx Tool");

    m_effectType->blockSignals(true);
    m_iterationInput->blockSignals(true);
    m_levelInput->blockSignals(true);

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

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

    slotEffect();
}

void DistortionFXTool::writeSettings(void)
{
    TDEConfig *config = kapp->config();
    config->setGroup("distortionfx Tool");
    config->writeEntry("EffectType", m_effectType->currentItem());
    config->writeEntry("IterationAjustment", m_iterationInput->value());
    config->writeEntry("LevelAjustment", m_levelInput->value());
    m_previewWidget->writeSettings();
    config->sync();
}

void DistortionFXTool::slotResetSettings()
{
    m_effectType->blockSignals(true);
    m_levelInput->blockSignals(true);
    m_iterationInput->blockSignals(true);

    m_levelInput->slotReset();
    m_iterationInput->slotReset();
    m_effectType->slotReset();
    slotEffectTypeChanged(m_effectType->defaultItem());

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

void DistortionFXTool::slotEffectTypeChanged(int type)
{
    m_levelInput->setEnabled(true);
    m_levelLabel->setEnabled(true);

    m_levelInput->blockSignals(true);
    m_iterationInput->blockSignals(true);
    m_levelInput->setRange(0, 100, 1);
    m_levelInput->setValue(25);

    switch (type)
    {
        case DistortionFX::Twirl:
            m_levelInput->setRange(-50, 50, 1);
            m_levelInput->setValue(10);
            break;

        case DistortionFX::FishEye:
        case DistortionFX::CilindricalHor:
        case DistortionFX::CilindricalVert:
        case DistortionFX::CilindricalHV:
        case DistortionFX::Caricature:
            m_levelInput->setRange(0, 200, 1);
            m_levelInput->setValue(50);
            break;

        case DistortionFX::MultipleCorners:
            m_levelInput->setRange(1, 10, 1);
            m_levelInput->setValue(4);
            break;

        case DistortionFX::WavesHorizontal:
        case DistortionFX::WavesVertical:
        case DistortionFX::BlockWaves1:
        case DistortionFX::BlockWaves2:
        case DistortionFX::CircularWaves1:
        case DistortionFX::CircularWaves2:
        case DistortionFX::Tile:
            m_iterationInput->setEnabled(true);
            m_iterationLabel->setEnabled(true);
            m_iterationInput->setRange(0, 200, 1);
            m_iterationInput->setValue(10);
            break;

        case DistortionFX::PolarCoordinates:
        case DistortionFX::UnpolarCoordinates:
            m_levelInput->setEnabled(false);
            m_levelLabel->setEnabled(false);
            break;
    }

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

    slotEffect();
}

void DistortionFXTool::prepareEffect()
{
    m_effectTypeLabel->setEnabled(false);
    m_effectType->setEnabled(false);
    m_levelInput->setEnabled(false);
    m_levelLabel->setEnabled(false);
    m_iterationInput->setEnabled(false);
    m_iterationLabel->setEnabled(false);

    int l = m_levelInput->value();
    int f = m_iterationInput->value();
    int e = m_effectType->currentItem();

    ImageIface* iface = m_previewWidget->imageIface();

    uchar *data = iface->getPreviewImage();
    DImg image(iface->previewWidth(), iface->previewHeight(), iface->previewSixteenBit(),
                        iface->previewHasAlpha(), data);
    delete [] data;

    setFilter(dynamic_cast<DImgThreadedFilter *> (new DistortionFX(&image, this, e, l, f)));
}

void DistortionFXTool::prepareFinal()
{
    m_effectTypeLabel->setEnabled(false);
    m_effectType->setEnabled(false);
    m_levelInput->setEnabled(false);
    m_levelLabel->setEnabled(false);
    m_iterationInput->setEnabled(false);
    m_iterationLabel->setEnabled(false);

    int l = m_levelInput->value();
    int f = m_iterationInput->value();
    int e = m_effectType->currentItem();

    ImageIface iface(0, 0);

    setFilter(dynamic_cast<DImgThreadedFilter *> (new DistortionFX(iface.getOriginalImg(), this, e, l, f)));
}

void DistortionFXTool::putPreviewData(void)
{
    ImageIface* iface = m_previewWidget->imageIface();

    DImg imDest = filter()->getTargetImage()
            .smoothScale(iface->previewWidth(), iface->previewHeight());
    iface->putPreviewImage(imDest.bits());

    m_previewWidget->updatePreview();
}

void DistortionFXTool::putFinalData(void)
{
    ImageIface iface(0, 0);
    DImg targetImage = filter()->getTargetImage();
    iface.putOriginalImage(i18n("Distortion Effects"),
            targetImage.bits(),
            targetImage.width(), targetImage.height());
}

}  // NameSpace DigikamDistortionFXImagesPlugin