File indexing completed on 2025-01-05 03:59:44

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2013-07-15
  * Description : a widget to draw an image clip region.
  *
  * SPDX-FileCopyrightText: 2013-2014 by Yiou Wang <geow812 at gmail dot com>
  * SPDX-FileCopyrightText: 2010-2012 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
  * SPDX-FileCopyrightText: 2011-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "imageregionwidget.h"
 
 // C++ includes
 
 #include <cmath>
 
 // Qt includes
 
 #include <QTimer>
 #include <QIcon>
 
 // KDE includes
 
 #include <klocalizedstring.h>
 
 // Local includes
 
 #include "digikam_debug.h"
 #include "imageregionitem.h"
 #include "previewtoolbar.h"
 #include "previewlayout.h"
 #include "dimgitems_p.h"
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN ImageRegionWidget::Private
 {
 
 public:
 
     explicit Private()
       : capturePtMode(false),
         renderingPreviewMode(PreviewToolBar::PreviewBothImagesVertCont),
         oldRenderingPreviewMode(PreviewToolBar::PreviewBothImagesVertCont),
         delay(nullptr),
         item(nullptr)
     {
     }
 
     DImg             targetImage;
 
     bool             capturePtMode;
 
     int              renderingPreviewMode;
     int              oldRenderingPreviewMode;
 
     QPolygon         hightlightPoints;
 
     QTimer*          delay;
 
     ImageRegionItem* item;
 };
 
 ImageRegionWidget::ImageRegionWidget(QWidget* const parent, bool paintExtras)
     : GraphicsDImgView(parent),
       d_ptr(new Private)
 {
     d_ptr->item = new ImageRegionItem(this, paintExtras);
     setItem(d_ptr->item);
 
     setAttribute(Qt::WA_DeleteOnClose);
     setFrameStyle(QFrame::NoFrame);
     setMinimumSize(480, 320);
     setWhatsThis(i18n("<p>Here you can see the original clip image "
                       "which will be used for the preview computation.</p>"
                       "<p>Click and drag the mouse cursor in the "
                       "image to change the clip focus.</p>"));
 
     d_ptr->delay = new QTimer(this);
     d_ptr->delay->setInterval(500);
     d_ptr->delay->setSingleShot(true);
 
     connect(d_ptr->delay, SIGNAL(timeout()),
             this, SLOT(slotOriginalImageRegionChanged()));
 
     connect(this, SIGNAL(viewportRectChanged(QRectF)),
             this, SLOT(slotOriginalImageRegionChangedDelayed()));
 
     layout()->fitToWindow();
     installPanIcon();
 }
 
 ImageRegionWidget::~ImageRegionWidget()
 {
     delete d_ptr->item;
     delete d_ptr;
 }
 
 void ImageRegionWidget::setHighLightPoints(const QPolygon& pointsList)
 {
     d_ptr->item->setHighLightPoints(pointsList);
     viewport()->update();
 }
 
 void ImageRegionWidget::setCapturePointMode(bool b)
 {
     if (d_ptr->capturePtMode && b)
     {
         return;
     }
 
     d_ptr->capturePtMode = b;
     viewport()->setMouseTracking(!b);
 
     if (b)
     {
         d_ptr->oldRenderingPreviewMode = d_ptr->renderingPreviewMode;
         slotPreviewModeChanged(PreviewToolBar::PreviewOriginalImage);
         viewport()->setCursor(QCursor(QIcon::fromTheme(QLatin1String("color-picker")).pixmap(32), 4, 27));
     }
     else
     {
         slotPreviewModeChanged(d_ptr->oldRenderingPreviewMode);
         viewport()->unsetCursor();
     }
 }
 
 void ImageRegionWidget::slotPreviewModeChanged(int mode)
 {
     d_ptr->renderingPreviewMode = mode;
     d_ptr->item->setRenderingPreviewMode(mode);
     slotOriginalImageRegionChanged();
     viewport()->update();
 }
 
 QRect ImageRegionWidget::getOriginalImageRegionToRender() const
 {
     QRect  r = d_ptr->item->getImageRegion();
     double z = layout()->realZoomFactor();
 
     int x    = qRound((double)r.x()      / z);
     int y    = qRound((double)r.y()      / z);
     int w    = qRound((double)r.width()  / z);
     int h    = qRound((double)r.height() / z);
 
     QRect rect(x, y, w, h);
     return (rect);
 }
 
 void ImageRegionWidget::setPreviewImage(const DImg& img)
 {
     d_ptr->targetImage = img;
     QRect r            = d_ptr->item->getImageRegion();
     d_ptr->targetImage.resize(r.width(), r.height());
 
     // Because tool which only work on image data, the DImg container
     // do not contain metadata from original image. About Color Managed View, we need to
     // restore the embedded ICC color profile.
     // However, some tools may set a profile on the preview image, which we accept of course.
 
     if (d_ptr->targetImage.getIccProfile().isNull())
     {
         d_ptr->targetImage.setIccProfile(d_ptr->item->image().getIccProfile());
     }
 
     d_ptr->item->setTargetImage(d_ptr->targetImage);
 }
 
 DImg ImageRegionWidget::getOriginalImage() const
 {
     return (d_ptr->item->image().copy());
 }
 
 DImg ImageRegionWidget::getOriginalRegionImage(bool useDownscaledImage) const
 {
     DImg image = d_ptr->item->image().copy(getOriginalImageRegionToRender());
 
     if (useDownscaledImage)
     {
         QRect r = d_ptr->item->getImageRegion();
         image.resize(r.width(), r.height());
     }
 
     return (image);
 }
 
 void ImageRegionWidget::slotOriginalImageRegionChangedDelayed()
 {
     viewport()->update();
     d_ptr->delay->start();
 }
 
 void ImageRegionWidget::slotOriginalImageRegionChanged(bool targetDone)
 {
     if (targetDone)
     {
         Q_EMIT signalOriginalClipFocusChanged(); // For Image Edit Tools
     }
 }
 
 void ImageRegionWidget::exposureSettingsChanged()
 {
     d_ptr->item->clearCache();
     d_ptr->item->setTargetImage(d_ptr->targetImage);
 }
 
 void ImageRegionWidget::ICCSettingsChanged()
 {
     d_ptr->item->clearCache();
     d_ptr->item->setTargetImage(d_ptr->targetImage);
 }
 
 void ImageRegionWidget::mousePressEvent(QMouseEvent* e)
 {
     if (d_ptr->capturePtMode)
     {
         emitCapturedPointFromOriginal(mapToScene(e->pos()));
         QGraphicsView::mousePressEvent(e);
         return;
     }
 
     GraphicsDImgView::mousePressEvent(e);
 }
 
 void ImageRegionWidget::mouseReleaseEvent(QMouseEvent* e)
 {
     if (d_ptr->capturePtMode)
     {
         setCapturePointMode(false);
         QGraphicsView::mouseReleaseEvent(e);
         return;
     }
 
     GraphicsDImgView::mouseReleaseEvent(e);
 }
 
 void ImageRegionWidget::emitCapturedPointFromOriginal(const QPointF& pt)
 {
     int x        = (int)(pt.x() / layout()->realZoomFactor());
     int y        = (int)(pt.y() / layout()->realZoomFactor());
     QPoint imgPt(x, y);
     DColor color = d_ptr->item->image().getPixelColor(x, y);
     qCDebug(DIGIKAM_GENERAL_LOG) << "Captured point from image : " << imgPt;
     Q_EMIT signalCapturedPointFromOriginal(color, imgPt);
 }
 
 void ImageRegionWidget::updateImage(const DImg& img)
 {
     d_ptr->item->setImage(img);
 }
 
 } // namespace Digikam
 
 #include "moc_imageregionwidget.cpp"