File indexing completed on 2025-03-09 04:00:57

 // vim: set tabstop=4 shiftwidth=4 expandtab:
 /*
 Gwenview: an image viewer
 Copyright 2008 Aurélien Gâteau <agateau@kde.org>
 
 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
 of the License, 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.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
 
 */
 #ifndef ABSTRACTDOCUMENTVIEWADAPTER_H
 #define ABSTRACTDOCUMENTVIEWADAPTER_H
 
 #include <lib/gwenviewlib_export.h>
 
 // Qt
 #include <QObject>
 #include <QPoint>
 
 // KF
 
 // Local
 #include <lib/document/document.h>
 
 class QCursor;
 class QGraphicsWidget;
 class QRectF;
 
 namespace Gwenview
 {
 class AbstractImageView;
 class RasterImageView;
 
 /**
  * Classes inherit from this class so that they can be used inside the
  * DocumentPanel.
  */
 class GWENVIEWLIB_EXPORT AbstractDocumentViewAdapter : public QObject
 {
     Q_OBJECT
 public:
     AbstractDocumentViewAdapter();
     ~AbstractDocumentViewAdapter() override;
 
     QGraphicsWidget *widget() const
     {
         return mWidget;
     }
 
     virtual MimeTypeUtils::Kind kind() const = 0;
 
     virtual AbstractImageView *imageView() const
     {
         return nullptr;
     }
 
     virtual RasterImageView *rasterImageView() const
     {
         return nullptr;
     }
 
     virtual QCursor cursor() const;
 
     virtual void setCursor(const QCursor &);
 
     /**
      * @defgroup zooming functions
      * @{
      */
     virtual bool canZoom() const
     {
         return false;
     }
 
     // Implementation must emit zoomToFitChanged()
     virtual void setZoomToFit(bool)
     {
     }
 
     virtual bool zoomToFit() const
     {
         return false;
     }
 
     // Implementation must emit zoomToFillChanged()
     virtual void setZoomToFill(bool /*on*/, const QPointF & /*center*/ = QPointF(-1, -1))
     {
     }
 
     virtual bool zoomToFill() const
     {
         return false;
     }
 
     virtual qreal zoom() const
     {
         return 0;
     }
 
     virtual void setZoom(qreal /*zoom*/, const QPointF & /*center*/ = QPointF(-1, -1))
     {
     }
 
     virtual qreal computeZoomToFit() const
     {
         return 1.;
     }
 
     virtual qreal computeZoomToFill() const
     {
         return 1.;
     }
     /** @} */
 
     virtual Document::Ptr document() const = 0;
     virtual void setDocument(const Document::Ptr &) = 0;
 
     virtual void loadConfig()
     {
     }
 
     virtual QPointF scrollPos() const
     {
         return QPointF(0, 0);
     }
     virtual void setScrollPos(const QPointF & /*pos*/)
     {
     }
 
     /**
      * Rectangle within the item which is actually used to show the document.
      * In item coordinates.
      */
     virtual QRectF visibleDocumentRect() const;
 
 protected:
     void setWidget(QGraphicsWidget *widget)
     {
         mWidget = widget;
     }
 
 Q_SIGNALS:
     /**
      * @addgroup zooming functions
      * @{
      */
     void zoomChanged(qreal);
 
     void zoomToFitChanged(bool);
 
     void zoomToFillChanged(bool);
 
     void zoomInRequested(const QPointF &);
 
     void zoomOutRequested(const QPointF &);
     /** @} */
 
     void scrollPosChanged();
 
     /**
      * Emitted when the adapter is done showing the document for the first time
      */
     void completed();
 
     void previousImageRequested();
 
     void nextImageRequested();
 
     void toggleFullScreenRequested();
 
 private:
     QGraphicsWidget *mWidget = nullptr;
 };
 
 /**
  * An empty adapter, used when no document is displayed
  */
 class EmptyAdapter : public AbstractDocumentViewAdapter
 {
     Q_OBJECT
 public:
     EmptyAdapter();
     MimeTypeUtils::Kind kind() const override
     {
         return MimeTypeUtils::KIND_UNKNOWN;
     }
     Document::Ptr document() const override
     {
         return {};
     }
     void setDocument(const Document::Ptr &) override
     {
     }
 };
 
 } // namespace
 
 #endif /* ABSTRACTDOCUMENTVIEWADAPTER_H */