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// vim: set tabstop=4 shiftwidth=4 noexpandtab
/*
Gwenview - A simple image viewer for KDE
Copyright 2000-2004 Aurélien Gâteau
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef IMAGEVIEW_H
#define IMAGEVIEW_H
// Qt
#include <qmap.h>
#include <qscrollview.h>
#include <qtimer.h>
#include <qvaluelist.h>
// Local
#include "busylevelmanager.h"
#include "imageutils/imageutils.h"
#include "libgwenview_export.h"
class QEvent;
class QLabel;
class QMouseEvent;
class QPainter;
class QTimer;
class QWheelEvent;
class KAction;
class KActionCollection;
class KToggleAction;
typedef QValueList<KAction *> KActionPtrList;
namespace Gwenview {
class Document;
class LIBGWENVIEW_EXPORT ImageView : public QScrollView {
Q_OBJECT
public:
class ToolBase;
class ZoomTool;
class ScrollTool;
class EventFilter;
#if __GNUC__ < 3
friend class ToolBase;
friend class ZoomTool;
friend class ScrollTool;
#endif
friend class EventFilter;
enum ToolID { SCROLL, ZOOM };
enum ZoomMode { ZOOM_FIT, ZOOM_FIT_WIDTH, ZOOM_FIT_HEIGHT, ZOOM_FREE };
typedef QMap<ToolID,ToolBase*> Tools;
ImageView(QWidget* parent,Document*,KActionCollection*);
~ImageView();
// Properties
double zoom() const;
void setZoom(double zoom, int centerX=-1, int centerY=-1);
bool fullScreen() const;
void setFullScreen(bool);
int brightness() const;
int contrast() const;
int gamma() const;
public slots:
void setBrightness(int);
void setContrast(int);
void setGamma(int);
void updateFromSettings();
signals:
void selectPrevious();
void selectNext();
void doubleClicked();
void requestContextMenu(const QPoint&);
// Emitted whenever an hint should be displayed
void requestHintDisplay(const QString& hint);
// Emitted whenever brightness, contrast or gamma changes
void bcgChanged();
protected:
virtual void contentsDragEnterEvent(QDragEnterEvent*);
virtual void contentsDropEvent(QDropEvent*);
virtual void keyPressEvent(QKeyEvent*);
private:
struct Private;
Private* d;
struct PendingPaint {
PendingPaint( bool s, const QRect& r ) : rect( r ), smooth( s ) {};
PendingPaint() {}; // stupid Qt containers
QRect rect;
bool smooth;
};
enum Operation { CHECK_OPERATIONS = 0, SMOOTH_PASS = 1 << 0 };
void addPendingPaint( bool smooth, QRect rect = QRect());
void addPendingPaintInternal( bool smooth, QRect rect = QRect());
void performPaint( QPainter* painter, int clipx, int clipy, int clipw, int cliph, bool smooth );
void limitPaintSize( PendingPaint& paint );
void fullRepaint();
void cancelPending();
void scheduleOperation( Operation operation );
void checkPendingOperationsInternal();
void updateBusyLevels();
void updateZoom(ZoomMode, double value=0, int centerX=-1, int centerY=-1);
double computeZoom(bool in) const;
double computeZoomToFit() const;
double computeZoomToWidth() const;
double computeZoomToHeight() const;
void updateImageOffset();
void updateScrollBarMode();
void updateContentSize();
void updateFullScreenLabel();
void updateZoomActions();
void selectTool(ButtonState, bool force);
void restartAutoHideTimer();
void emitRequestHintDisplay();
// Used by the scroll tool
void emitSelectPrevious() { emit selectPrevious(); }
void emitSelectNext() { emit selectNext(); }
// Used by the zoom tool
QPoint offset() const;
bool canZoom(bool in) const;
KToggleAction* zoomToFit() const;
private slots:
void slotLoaded();
void slotModified();
void slotZoomIn();
void slotZoomOut();
void slotResetZoom();
void slotSelectZoom();
void setZoomToFit(bool);
void setZoomToWidth(bool);
void setZoomToHeight(bool);
void setLockZoom(bool);
void increaseGamma();
void decreaseGamma();
void increaseBrightness();
void decreaseBrightness();
void increaseContrast();
void decreaseContrast();
void slotImageSizeUpdated();
void slotImageRectUpdated(const QRect&);
void checkPendingOperations();
void loadingStarted();
void slotBusyLevelChanged(BusyLevel);
void showBCGDialog();
protected:
// Overloaded methods
bool eventFilter(QObject*, QEvent*);
void viewportMousePressEvent(QMouseEvent*);
void viewportMouseMoveEvent(QMouseEvent*);
void viewportMouseReleaseEvent(QMouseEvent*);
bool viewportKeyEvent(QKeyEvent*); // This one is not inherited, it's called from the eventFilter
void wheelEvent(QWheelEvent* event);
void resizeEvent(QResizeEvent* event);
void drawContents(QPainter* p,int clipx,int clipy,int clipw,int cliph);
};
} // namespace
#endif
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