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140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
// vim: set tabstop=4 shiftwidth=4 expandtab:
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/*
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Gwenview: an image viewer
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Copyright 2011 Aurélien Gâteau <agateau@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
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*/
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#ifndef ABSTRACTIMAGEVIEW_H
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#define ABSTRACTIMAGEVIEW_H
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// Local
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#include <lib/document/document.h>
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// KDE
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// Qt
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#include <QGraphicsWidget>
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namespace Gwenview
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{
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struct AbstractImageViewPrivate;
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/**
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*
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*/
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class AbstractImageView : public QGraphicsWidget
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{
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Q_OBJECT
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public:
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enum UpdateType {
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UpdateIfNecessary,
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ForceUpdate
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};
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AbstractImageView(QGraphicsItem* parent);
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~AbstractImageView();
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qreal zoom() const;
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virtual void setZoom(qreal zoom, const QPointF& center = QPointF(-1, -1), UpdateType updateType = UpdateIfNecessary);
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bool zoomToFit() const;
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virtual void setZoomToFit(bool value);
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virtual void setDocument(Document::Ptr doc);
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Document::Ptr document() const;
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qreal computeZoomToFit() const;
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QSizeF documentSize() const;
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QSizeF visibleImageSize() const;
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/**
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* If the image is smaller than the view, imageOffset is the distance from
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* the topleft corner of the view to the topleft corner of the image.
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* Neither x nor y can be negative.
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*/
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QPointF imageOffset() const;
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/**
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* The scroll position, in zoomed image coordinates.
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* x and y are always between 0 and (docsize * zoom - viewsize)
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*/
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QPointF scrollPos() const;
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void setScrollPos(const QPointF& pos);
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QPointF mapToView(const QPointF& imagePos) const;
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QPoint mapToView(const QPoint& imagePos) const;
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QRectF mapToView(const QRectF& imageRect) const;
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QRect mapToView(const QRect& imageRect) const;
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QPointF mapToImage(const QPointF& viewPos) const;
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QPoint mapToImage(const QPoint& viewPos) const;
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QRectF mapToImage(const QRectF& viewRect) const;
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QRect mapToImage(const QRect& viewRect) const;
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void setEnlargeSmallerImages(bool value);
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void applyPendingScrollPos();
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public Q_SLOTS:
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void updateCursor();
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Q_SIGNALS:
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void zoomToFitChanged(bool);
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void zoomChanged(qreal);
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void zoomInRequested(const QPointF&);
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void zoomOutRequested(const QPointF&);
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void scrollPosChanged();
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void completed();
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void previousImageRequested();
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void nextImageRequested();
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void toggleFullScreenRequested();
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protected:
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virtual void loadFromDocument() = 0;
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virtual void onZoomChanged() = 0;
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/**
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* Called when the offset changes.
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* Note: to avoid multiple adjustments, this is not called if zoom changes!
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*/
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virtual void onImageOffsetChanged() = 0;
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/**
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* Called when the scrollPos changes.
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* Note: to avoid multiple adjustments, this is not called if zoom changes!
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*/
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virtual void onScrollPosChanged(const QPointF& oldPos) = 0;
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void resizeEvent(QGraphicsSceneResizeEvent* event);
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void keyPressEvent(QKeyEvent* event);
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void keyReleaseEvent(QKeyEvent* event);
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void mousePressEvent(QGraphicsSceneMouseEvent* event);
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void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
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void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);
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void mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event);
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private:
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friend struct AbstractImageViewPrivate;
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AbstractImageViewPrivate* const d;
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};
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} // namespace
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#endif /* ABSTRACTIMAGEVIEW_H */
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