qimageformat(3qt) [centos man page]
QImageFormat(3qt) QImageFormat(3qt) NAME
QImageFormat - Incremental image decoder for a specific image format SYNOPSIS
#include <qasyncimageio.h> Public Members virtual int decode ( QImage & img, QImageConsumer * consumer, const uchar * buffer, int length ) = 0 DESCRIPTION
The QImageFormat class is an incremental image decoder for a specific image format. By making a derived class of QImageFormatType, which in turn creates objects that are a subclass of QImageFormat, you can add support for more incremental image formats, allowing such formats to be sources for a QMovie or for the first frame of the image stream to be loaded as a QImage or QPixmap. Your new subclass must reimplement the decode() function in order to process your new format. New QImageFormat objects are generated by new QImageFormatType factories. See also Graphics Classes, Image Processing Classes, and Multimedia Classes. MEMBER FUNCTION DOCUMENTATION
int QImageFormat::decode ( QImage & img, QImageConsumer * consumer, const uchar * buffer, int length ) [pure virtual] New subclasses must reimplement this method. It should decode some or all of the bytes from buffer into img, calling the methods of consumer as the decoding proceeds to inform that consumer of changes to the image. The length of the data is given in length. The consumer may be 0, in which case the function should just process the data into img without telling any consumer about the changes. Note that the decoder must store enough state to be able to continue in subsequent calls to this method - this is the essence of the incremental image loading. The function should return without processing all the data if it reaches the end of a frame in the input. The function must return the number of bytes it has processed. SEE ALSO
http://doc.trolltech.com/qimageformat.html http://www.trolltech.com/faq/tech.html COPYRIGHT
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the license file included in the distribution for a complete license statement. AUTHOR
Generated automatically from the source code. BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qimageformat.3qt) and the Qt version (3.3.8). Trolltech AS 2 February 2007 QImageFormat(3qt)
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QImageDrag(3qt) QImageDrag(3qt) NAME
QImageDrag - Drag and drop object for transferring images SYNOPSIS
#include <qdragobject.h> Inherits QDragObject. Public Members QImageDrag ( QImage image, QWidget * dragSource = 0, const char * name = 0 ) QImageDrag ( QWidget * dragSource = 0, const char * name = 0 ) ~QImageDrag () virtual void setImage ( QImage image ) Static Public Members bool canDecode ( const QMimeSource * e ) bool decode ( const QMimeSource * e, QImage & img ) bool decode ( const QMimeSource * e, QPixmap & pm ) DESCRIPTION
The QImageDrag class provides a drag and drop object for transferring images. Images are offered to the receiving application in multiple formats, determined by Qt's output formats. For more information about drag and drop, see the QDragObject class and the drag and drop documentation. See also Drag And Drop Classes. MEMBER FUNCTION DOCUMENTATION
QImageDrag::QImageDrag ( QImage image, QWidget * dragSource = 0, const char * name = 0 ) Constructs an image drag object and sets its data to image. dragSource must be the drag source; name is the object name. QImageDrag::QImageDrag ( QWidget * dragSource = 0, const char * name = 0 ) Constructs a default image drag object. dragSource must be the drag source; name is the object name. QImageDrag::~QImageDrag () Destroys the image drag object and frees up all allocated resources. bool QImageDrag::canDecode ( const QMimeSource * e ) [static] Returns TRUE if the information in mime source e can be decoded into an image; otherwise returns FALSE. See also decode(). Example: desktop/desktop.cpp. bool QImageDrag::decode ( const QMimeSource * e, QImage & img ) [static] Attempts to decode the dropped information in mime source e into img. Returns TRUE if successful; otherwise returns FALSE. See also canDecode(). Example: desktop/desktop.cpp. bool QImageDrag::decode ( const QMimeSource * e, QPixmap & pm ) [static] This is an overloaded member function, provided for convenience. It behaves essentially like the above function. Attempts to decode the dropped information in mime source e into pixmap pm. Returns TRUE if successful; otherwise returns FALSE. This is a convenience function that converts to a QPixmap via a QImage. See also canDecode(). void QImageDrag::setImage ( QImage image ) [virtual] Sets the image to be dragged to image. You will need to call this if you did not pass the image during construction. SEE ALSO
http://doc.trolltech.com/qimagedrag.html http://www.trolltech.com/faq/tech.html COPYRIGHT
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the license file included in the distribution for a complete license statement. AUTHOR
Generated automatically from the source code. BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qimagedrag.3qt) and the Qt version (3.3.8). Trolltech AS 2 February 2007 QImageDrag(3qt)