File indexing completed on 2025-01-19 03:51:02

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2022-04-01
  * Description : JPEG-XL image export settings widget.
  *
  * SPDX-FileCopyrightText: 2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "dimgjxlexportsettings.h"
 
 // Qt includes
 
 #include <QString>
 #include <QLabel>
 #include <QCheckBox>
 #include <QLayout>
 #include <QGridLayout>
 #include <QApplication>
 #include <QStyle>
 
 // KDE includes
 
 #include <klocalizedstring.h>
 
 // Local includes
 
 #include "dnuminput.h"
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN DImgJXLExportSettings::Private
 {
 
 public:
 
     explicit Private()
       : JXLGrid            (nullptr),
         labelJXLcompression(nullptr),
         JXLLossLess        (nullptr),
         JXLcompression     (nullptr)
     {
     }
 
     QGridLayout*  JXLGrid;
 
     QLabel*       labelJXLcompression;
 
     QCheckBox*    JXLLossLess;
 
     DIntNumInput* JXLcompression;
 };
 
 DImgJXLExportSettings::DImgJXLExportSettings(QWidget* const parent)
     : DImgLoaderSettings(parent),
       d                 (new Private)
 {
     const int spacing = qMin(QApplication::style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing),
                              QApplication::style()->pixelMetric(QStyle::PM_LayoutVerticalSpacing));
 
     d->JXLGrid     = new QGridLayout(this);
     d->JXLLossLess = new QCheckBox(i18n("Lossless JPEG XL files"), this);
 
     d->JXLLossLess->setWhatsThis(i18n("<p>Toggle lossless compression for JPEG XL images.</p>"
                                       "<p>If this option is enabled, a lossless method will be used "
                                       "to compress JPEG XL pictures.</p>"));
 
     d->JXLcompression = new DIntNumInput(this);
     d->JXLcompression->setDefaultValue(75);
     d->JXLcompression->setRange(1, 99, 1);
     d->labelJXLcompression = new QLabel(i18n("JPEG XL quality:"), this);
 
     d->JXLcompression->setWhatsThis(i18n("<p>The quality value for JPEG XL images:</p>"
                                          "<p><b>1</b>: low quality (high compression and small "
                                          "file size)<br/>"
                                          "<b>50</b>: medium quality<br/>"
                                          "<b>75</b>: good quality (default)<br/>"
                                          "<b>99</b>: high quality (no compression and "
                                          "large file size)</p>"
                                          "<p><b>Note: JPEG XL is not a lossless image "
                                          "compression format when you use this setting.</b></p>"));
 
     d->JXLGrid->addWidget(d->JXLLossLess,         0, 0, 1, 2);
     d->JXLGrid->addWidget(d->labelJXLcompression, 1, 0, 1, 2);
     d->JXLGrid->addWidget(d->JXLcompression,      2, 0, 1, 2);
     d->JXLGrid->setColumnStretch(1, 10);
     d->JXLGrid->setRowStretch(3, 10);
     d->JXLGrid->setContentsMargins(spacing, spacing, spacing, spacing);
     d->JXLGrid->setSpacing(spacing);
 
     connect(d->JXLLossLess, SIGNAL(toggled(bool)),
             this, SLOT(slotToggleJXLLossLess(bool)));
 
     connect(d->JXLLossLess, SIGNAL(toggled(bool)),
             this, SIGNAL(signalSettingsChanged()));
 
     connect(d->JXLcompression, SIGNAL(valueChanged(int)),
             this, SIGNAL(signalSettingsChanged()));
 }
 
 DImgJXLExportSettings::~DImgJXLExportSettings()
 {
     delete d;
 }
 
 void DImgJXLExportSettings::setSettings(const DImgLoaderPrms& set)
 {
     for (DImgLoaderPrms::const_iterator it = set.constBegin() ; it != set.constEnd() ; ++it)
     {
         if      (it.key() == QLatin1String("quality"))
         {
             d->JXLcompression->setValue(it.value().toInt());
         }
         else if (it.key() == QLatin1String("lossless"))
         {
             d->JXLLossLess->setChecked(it.value().toBool());
         }
     }
 
     slotToggleJXLLossLess(d->JXLLossLess->isChecked());
 }
 
 DImgLoaderPrms DImgJXLExportSettings::settings() const
 {
     DImgLoaderPrms set;
 
     // NOTE: if quality = 100 --> lossless compression.
 
     set.insert(QLatin1String("quality"),  d->JXLLossLess->isChecked() ? 100 : d->JXLcompression->value());
     set.insert(QLatin1String("lossless"), d->JXLLossLess->isChecked());
 
     return set;
 }
 
 void DImgJXLExportSettings::slotToggleJXLLossLess(bool b)
 {
     d->JXLcompression->setEnabled(!b);
     d->labelJXLcompression->setEnabled(!b);
 }
 
 } // namespace Digikam
 
 #include "moc_dimgjxlexportsettings.cpp"