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#ifndef _IMAGE_SCROLL_VIEW_H
#define _IMAGE_SCROLL_VIEW_H
#include <qscrollview.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qstring.h>
#include <qdialog.h>
#include <qbitarray.h>
class QPainter;
namespace Opie { namespace MM {
class OImageZoomer;
/**
* \brief Class displaying an image with scrollbars
*
* This class displays various image formats supported by QT an
* gives a small interface for basics display modifications.
*
* @see QScrollView
*
* @since 1.2
*/
class OImageScrollView:public QScrollView
{
Q_OBJECT
public:
enum Rotation {
Rotate0,
Rotate90,
Rotate180,
Rotate270
};
/**
* Standard constructor
* @param parent the parent widget
* @param name the name of the widget
* @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
*/
OImageScrollView( QWidget* parent, const char* name = 0, WFlags fl = 0 );
/**
* constructor
* @param aImage QImage object to display
* @param parent the parent widget
* @param name the name of the widget
* @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
* @param always_scale if the image should be scaled into the display
* @param rfit the image will be rotated to fit
*/
OImageScrollView (const QImage&aImage, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
/**
* constructor
* @param aFile image file to display
* @param parent the parent widget
* @param name the name of the widget
* @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
* @param always_scale if the image should be scaled into the display
* @param rfit the image will be rotated to fit
*/
OImageScrollView (const QString&aFile, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
virtual ~OImageScrollView();
/**
* sets the WDestructiveClose flag to the view
*/
virtual void setDestructiveClose();
/**
* set if the image should be rotate to best fit
* and repaint it if set to a new value.
*
* Be carefull - autorating real large images cost time!
* @param how if true then autorotate otherwise not
*/
virtual void setAutoRotate(bool how);
/**
* set if the image should be scaled to the size of the viewport if larger(!)
*
* if autoscaling is set when loading a jpeg image, it will use a feature of
* jpeg lib to load the image scaled to display size. If switch of later the
* image will reloaded.
*
* @param how true - display image scaled down otherwise not
*/
virtual void setAutoScale(bool how);
/**
* set if the image should be scaled to the size of the viewport if larger(!)
* and/or rotate to best fit. You avoid double repainting when you want to switch
* booth values.
*
* if autoscaling is set when loading a jpeg image, it will use a feature of
* jpeg lib to load the image scaled to display size. If switch of later the
* image will reloaded.
*
* @param scale true - display image scaled down otherwise not
* @param rotate true - the image will rotate for best fit
*/
virtual void setAutoScaleRotate(bool scale, bool rotate);
/**
* set if there should be displayed a small zoomer widget at the right bottom of
* the view when the image is larger than the viewport.
*
* @param how true - display zoomer
*/
virtual void setShowZoomer(bool how);
/**
* return the current value of the autorotate flag.
*/
virtual bool AutoRotate()const;
/**
* return the current value of the autoscale flag.
*/
virtual bool AutoScale()const;
/**
* return the current value of the show zoomer flag.
*/
virtual bool ShowZoomer()const;
public slots:
/**
* Displays a new image, calculations will made immediately.
*
* @param aImage the image to display
*/
virtual void setImage(const QImage&aImage);
/**
* Displays a new image, calculations will made immediately.
*
* @param path the image to display
*/
virtual void setImage( const QString& path );
signals:
/**
* emitted when the display image size has changed.
*/
void imageSizeChanged( const QSize& );
/**
* emitted when the size of the viewport has changed, eg. in resizeEvent of
* the view.
*
* @see QWidget::resizeEvent
*/
void viewportSizeChanged( const QSize& );
protected:
virtual void drawContents ( QPainter * p, int clipx, int clipy, int clipw, int cliph );
void init();
Opie::MM::OImageZoomer *_zoomer;
QImage _image_data;
QImage _original_data;
QPixmap _pdata;
int _mouseStartPosX,_mouseStartPosY;
QBitArray m_states;
Rotation m_last_rot;
QString m_lastName;
virtual void rescaleImage(int w, int h);
virtual void rotate_into_data(Rotation r);
virtual void generateImage();
virtual void loadJpeg(bool interncall = false);
bool image_fit_into(const QSize&s);
void check_zoomer();
/* internal bitset manipulation */
virtual bool ImageIsJpeg()const;
virtual void setImageIsJpeg(bool how);
virtual bool ImageScaledLoaded()const;
virtual void setImageScaledLoaded(bool how);
virtual bool FirstResizeDone()const;
virtual void setFirstResizeDone(bool how);
protected slots:
virtual void viewportMouseMoveEvent(QMouseEvent* e);
virtual void contentsMousePressEvent ( QMouseEvent * e);
virtual void resizeEvent(QResizeEvent * e);
virtual void keyPressEvent(QKeyEvent * e);
};
}
}
#endif
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