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/* This file is part of the KDE Project
Copyright (C) 1999 Klaas Freitag <freitag@suse.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __IMG_CANVAS_H__
#define __IMG_CANVAS_H__
#include <qwidget.h>
#include <qrect.h>
#include <stdlib.h>
#include <qsize.h>
#include <qwmatrix.h>
#include <qscrollview.h>
#include <qstrlist.h>
#ifdef USE_KPIXMAPIO
#include <kpixmapio.h>
#endif
class QPopupMenu;
class QPixmap;
class QImage;
class QPainter;
enum preview_state {
MOVE_NONE,
MOVE_TOP_LEFT,
MOVE_TOP_RIGHT,
MOVE_BOTTOM_LEFT,
MOVE_BOTTOM_RIGHT,
MOVE_LEFT,
MOVE_RIGHT,
MOVE_TOP,
MOVE_BOTTOM,
MOVE_WHOLE
};
enum cursor_type {
CROSS,
VSIZE,
HSIZE,
BDIAG,
FDIAG,
ALL,
HREN
};
const int MIN_AREA_WIDTH = 3;
const int MIN_AREA_HEIGHT = 3;
const int delta = 3;
#ifdef __PREVIEW_CPP__
int max_dpi = 600;
#else
extern int max_dpi;
#endif
class ImageCanvas: public QScrollView
{
Q_OBJECT
Q_ENUMS( PopupIDs )
Q_PROPERTY( int brightness READ getBrightness WRITE setBrightness )
Q_PROPERTY( int contrast READ getContrast WRITE setContrast )
Q_PROPERTY( int gamma READ getGamma WRITE setGamma )
Q_PROPERTY( int scale_factor READ getScaleFactor WRITE setScaleFactor )
public:
ImageCanvas( QWidget *parent = 0,
const QImage *start_image = 0,
const char *name = 0);
~ImageCanvas( );
int getBrightness() const;
int getContrast() const;
int getGamma() const;
int getScaleFactor() const;
const QImage *rootImage();
bool hasImage( void ) { return acquired; }
QPopupMenu* contextMenu() { return m_contextMenu; }
QRect sel( void );
enum ScaleKinds { UNSPEC, DYNAMIC, FIT_ORIG, FIT_WIDTH, FIT_HEIGHT, ZOOM };
enum PopupIDs { ID_POP_ZOOM, ID_POP_CLOSE, ID_FIT_WIDTH,
ID_FIT_HEIGHT, ID_ORIG_SIZE };
bool selectedImage( QImage* );
ScaleKinds scaleKind();
const QString scaleKindString();
ScaleKinds defaultScaleKind();
const QString imageInfoString( int w=0, int h=0, int d=0 );
public slots:
void setBrightness(int);
void setContrast(int );
void setGamma(int );
void toggleAspect( int aspect_in_mind )
{
maintain_aspect = aspect_in_mind;
repaint();
}
virtual QSize sizeHint() const;
void newImage( QImage* );
void newImageHoldZoom( QImage* );
void deleteView( QImage *);
void newRectSlot();
void newRectSlot( QRect newSel );
void noRectSlot( void );
void setScaleFactor( int i );
void handle_popup(int item );
void enableContextMenu( bool wantContextMenu );
void setKeepZoom( bool k );
void setScaleKind( ScaleKinds k );
void setDefaultScaleKind( ScaleKinds k );
/**
* Highlight a rectangular area on the current image using the given brush
* and pen.
* The function returns a id that needs to be given to the remove method.
*/
int highlight( const QRect&, const QPen&, const QBrush&, bool ensureVis=false );
/**
* reverts the highlighted region back to normal view.
*/
void removeHighlight( int idx = -1 );
/**
* permit to do changes to the image that are saved back to the file
*/
void setReadOnly( bool );
bool readOnly();
signals:
void noRect( void );
void newRect( void );
void newRect( QRect );
void scalingRequested();
void closingRequested();
void scalingChanged( const QString& );
/**
* signal emitted if the permission of the currently displayed image changed,
* ie. if it goes from writeable to readable.
* @param shows if the image is now read only (true) or not.
*/
void imageReadOnly( bool isRO );
protected:
void drawContents( QPainter * p, int clipx, int clipy, int clipw, int cliph );
void timerEvent(QTimerEvent *);
void viewportMousePressEvent(QMouseEvent *);
void viewportMouseReleaseEvent(QMouseEvent *);
void viewportMouseMoveEvent(QMouseEvent *);
void resizeEvent( QResizeEvent * event );
private:
QStrList urls;
int scale_factor;
const QImage *image;
int brightness, contrast, gamma;
#ifdef USE_KPIXMAPIO
KPixmapIO pixIO;
#endif
QWMatrix scale_matrix;
QWMatrix inv_scale_matrix;
QPixmap *pmScaled;
float used_yscaler;
float used_xscaler;
QPopupMenu *m_contextMenu;
bool maintain_aspect;
int timer_id;
QRect *selected;
preview_state moving;
int cr1,cr2;
int lx,ly;
bool acquired;
/* private functions for the running ant */
void drawHAreaBorder(QPainter &p,int x1,int x2,int y,int r = FALSE);
void drawVAreaBorder(QPainter &p,int x,int y1,int y2,int r = FALSE);
void drawAreaBorder(QPainter *p,int r = FALSE);
void update_scaled_pixmap( void );
preview_state classifyPoint(int x,int y);
class ImageCanvasPrivate;
ImageCanvasPrivate *d;
};
#endif
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