File indexing completed on 2025-01-05 03:59:40

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2008-08-20
  * Description : A widget stack to embed editor view.
  *
  * SPDX-FileCopyrightText: 2008-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "editorstackview.h"
 
 // Local includes
 
 #include "dzoombar.h"
 #include "canvas.h"
 #include "thumbnailsize.h"
 #include "graphicsdimgview.h"
 #include "previewlayout.h"
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN EditorStackView::Private
 {
 
 public:
 
     explicit Private()
       : toolView(nullptr),
         canvas  (nullptr)
     {
     }
 
     QWidget* toolView;
     Canvas*  canvas;
 };
 
 EditorStackView::EditorStackView(QWidget* const parent)
     : QStackedWidget(parent),
       d             (new Private)
 {
 }
 
 EditorStackView::~EditorStackView()
 {
     delete d;
 }
 
 void EditorStackView::setCanvas(Canvas* const canvas)
 {
     if (d->canvas)
     {
         return;
     }
 
     d->canvas = canvas;
     insertWidget(CanvasMode, d->canvas);
 
     connect(d->canvas, SIGNAL(signalZoomChanged(double)),
             this, SLOT(slotZoomChanged(double)));
 
     connect(d->canvas, SIGNAL(signalToggleOffFitToWindow()),
             this, SIGNAL(signalToggleOffFitToWindow()));
 }
 
 Canvas* EditorStackView::canvas() const
 {
     return d->canvas;
 }
 
 void EditorStackView::setToolView(QWidget* const view)
 {
     if (d->toolView)
     {
         removeWidget(d->toolView);
     }
 
     d->toolView = view;
 
     if (d->toolView)
     {
         insertWidget(ToolViewMode, d->toolView);
     }
 
     GraphicsDImgView* const preview = previewWidget();
 
     if (preview)
     {
         connect(preview->layout(), SIGNAL(zoomFactorChanged(double)),
                 this, SLOT(slotZoomChanged(double)));
 
         connect(preview->layout(), SIGNAL(fitToWindowToggled(bool)),
                 this, SLOT(slotToggleOffFitToWindow(bool)));
     }
 }
 
 QWidget* EditorStackView::toolView() const
 {
     return d->toolView;
 }
 
 int EditorStackView::viewMode() const
 {
     return indexOf(currentWidget());
 }
 
 void EditorStackView::setViewMode(int mode)
 {
     if ((mode != CanvasMode) && (mode != ToolViewMode))
     {
         return;
     }
 
     setCurrentIndex(mode);
 }
 
 void EditorStackView::increaseZoom()
 {
     if (viewMode() == CanvasMode)
     {
         d->canvas->layout()->increaseZoom();
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             preview->layout()->increaseZoom();
         }
     }
 }
 
 void EditorStackView::decreaseZoom()
 {
     if (viewMode() == CanvasMode)
     {
         d->canvas->layout()->decreaseZoom();
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             preview->layout()->decreaseZoom();
         }
     }
 }
 
 void EditorStackView::toggleFitToWindow()
 {
     // Fit to window action is common place to switch view in this mode.
     // User want to see the same behaviors between canvas and tool preview.
     // Both are toggle at the same time.
 
     d->canvas->layout()->toggleFitToWindow();
 
     GraphicsDImgView* const preview = previewWidget();
 
     if (preview)
     {
         preview->layout()->toggleFitToWindow();
     }
 }
 
 void EditorStackView::fitToSelect()
 {
     if (viewMode() == CanvasMode)
     {
         d->canvas->fitToSelect();
     }
 }
 
 void EditorStackView::zoomTo100Percent()
 {
     if (viewMode() == CanvasMode)
     {
         d->canvas->layout()->toggleFitToWindowOr100();
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             preview->layout()->toggleFitToWindowOr100();
         }
     }
 }
 
 void EditorStackView::setZoomFactor(double zoom)
 {
     if (viewMode() == CanvasMode)
     {
         d->canvas->layout()->setZoomFactor(zoom);
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             preview->layout()->setZoomFactor(zoom);
         }
     }
 }
 
 double EditorStackView::zoomMax() const
 {
     if (viewMode() == CanvasMode)
     {
         return d->canvas->layout()->maxZoomFactor();
     }
     else
     {
         GraphicsDImgView* const preview  = previewWidget();
 
         if (preview)
         {
             return preview->layout()->maxZoomFactor();
         }
         else
         {
             return (-1.0);
         }
     }
 }
 
 double EditorStackView::zoomMin() const
 {
     if (viewMode() == CanvasMode)
     {
         return d->canvas->layout()->minZoomFactor();
     }
     else
     {
         GraphicsDImgView* const preview  = previewWidget();
 
         if (preview)
         {
             return preview->layout()->minZoomFactor();
         }
         else
         {
             return (-1.0);
         }
     }
 }
 
 void EditorStackView::slotZoomSliderChanged(int size)
 {
     if ((viewMode() == ToolViewMode) && !isZoomablePreview())
     {
         return;
     }
 
     double z = DZoomBar::zoomFromSize(size, zoomMin(), zoomMax());
 
     if (viewMode() == CanvasMode)
     {
         d->canvas->layout()->setZoomFactorSnapped(z);
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             preview->layout()->setZoomFactorSnapped(z);
         }
     }
 }
 
 void EditorStackView::slotZoomChanged(double zoom)
 {
     bool max, min;
 
     if (viewMode() == CanvasMode)
     {
         max = d->canvas->layout()->atMaxZoom();
         min = d->canvas->layout()->atMinZoom();
 
         Q_EMIT signalZoomChanged(max, min, zoom);
     }
     else
     {
         GraphicsDImgView* const preview = previewWidget();
 
         if (preview)
         {
             max = preview->layout()->atMaxZoom();
             min = preview->layout()->atMinZoom();
 
             Q_EMIT signalZoomChanged(max, min, zoom);
         }
     }
 }
 
 void EditorStackView::slotToggleOffFitToWindow(bool b)
 {
     if (b)
     {
         Q_EMIT signalToggleOffFitToWindow();
     }
 }
 
 GraphicsDImgView* EditorStackView::previewWidget() const
 {
     GraphicsDImgView* const preview = dynamic_cast<GraphicsDImgView*>(d->toolView);
 
     if (preview)
     {
         return preview;
     }
 
     return nullptr;
 }
 
 bool EditorStackView::isZoomablePreview() const
 {
     return previewWidget();
 }
 
 } // namespace Digikam
 
 #include "moc_editorstackview.cpp"