QCanvasPixmapArray(3qt)QCanvasPixmapArray(3qt)NAME
QCanvasPixmapArray - Array of QCanvasPixmaps
SYNOPSIS
#include <qcanvas.h>
Public Members
QCanvasPixmapArray ()
QCanvasPixmapArray ( const QString & datafilenamepattern, int fc = 0 )
QCanvasPixmapArray ( QPtrList<QPixmap> list, QPtrList<QPoint> hotspots
) (obsolete)
QCanvasPixmapArray ( QValueList<QPixmap> list, QPointArray hotspots =
QPointArray ( ) )
~QCanvasPixmapArray ()
bool readPixmaps ( const QString & filenamepattern, int fc = 0 )
bool readCollisionMasks ( const QString & filename )
bool operator! () (obsolete)
bool isValid () const
QCanvasPixmap * image ( int i ) const
void setImage ( int i, QCanvasPixmap * p )
uint count () const
DESCRIPTION
The QCanvasPixmapArray class provides an array of QCanvasPixmaps.
This class is used by QCanvasSprite to hold an array of pixmaps. It is
used to implement animated sprites, i.e. images that change over time,
with each pixmap in the array holding one frame.
Depending on the constructor you use you can load multiple pixmaps into
the array either from a directory (specifying a wildcard pattern for
the files), or from a list of QPixmaps. You can also read in a set of
pixmaps after construction using readPixmaps().
Individual pixmaps can be set with setImage() and retrieved with
image(). The number of pixmaps in the array is returned by count().
QCanvasSprite uses an image's mask for collision detection. You can
change this by reading in a separate set of image masks using
readCollisionMasks().
See also Graphics Classes and Image Processing Classes.
MEMBER FUNCTION DOCUMENTATIONQCanvasPixmapArray::QCanvasPixmapArray ()
Constructs an invalid array (i.e. isValid() will return FALSE). You
must call readPixmaps() before being able to use this
QCanvasPixmapArray.
QCanvasPixmapArray::QCanvasPixmapArray ( const QString & datafilenamepattern,
int fc = 0 )
Constructs a QCanvasPixmapArray from files.
The fc parameter sets the number of frames to be loaded for this image.
If fc is not 0, datafilenamepattern should contain "%1", e.g.
"foo%1.png". The actual filenames are formed by replacing the %1 with
four-digit integers from 0 to (fc - 1), e.g. foo0000.png, foo0001.png,
foo0002.png, etc.
If fc is 0, datafilenamepattern is asssumed to be a filename, and the
image contained in this file will be loaded as the first (and only)
frame.
If datafilenamepattern does not exist, is not readable, isn't an image,
or some other error occurs, the array ends up empty and isValid()
returns FALSE.
QCanvasPixmapArray::QCanvasPixmapArray ( QPtrList<;QPixmap> list,
QPtrList<QPoint> hotspots )
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
Use QCanvasPixmapArray::QCanvasPixmapArray( QValueList<QPixmap>,
QPointArray ) instead.
Constructs a QCanvasPixmapArray from the list of QPixmaps list. The
hotspots list has to be of the same size as list.
QCanvasPixmapArray::QCanvasPixmapArray ( QValueList<;QPixmap> list, QPointArray
hotspots = QPointArray ( ) )
Constructs a QCanvasPixmapArray from the list of QPixmaps in the list.
Each pixmap will get a hotspot according to the hotspots array. If no
hotspots are specified, each one is set to be at position (0, 0).
If an error occurs, isValid() will return FALSE.
QCanvasPixmapArray::~QCanvasPixmapArray ()
Destroys the pixmap array and all the pixmaps it contains.
uint QCanvasPixmapArray::count () const
Returns the number of pixmaps in the array.
QCanvasPixmap * QCanvasPixmapArray::image ( int i ) const
Returns pixmap i in the array, if i is non-negative and less than than
count(), and returns an unspecified value otherwise.
bool QCanvasPixmapArray::isValid () const
Returns TRUE if the pixmap array is valid; otherwise returns FALSE.
bool QCanvasPixmapArray::operator! ()
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
Use isValid() instead.
This returns FALSE if the array is valid, and TRUE if it is not.
bool QCanvasPixmapArray::readCollisionMasks ( const QString & filename )
Reads new collision masks for the array.
By default, QCanvasSprite uses the image mask of a sprite to detect
collisions. Use this function to set your own collision image masks.
If count() is 1 filename must specify a real filename to read the mask
from. If count() is greater than 1, the filename must contain a "%1"
that will get replaced by the number of the mask to be loaded, just
like QCanvasPixmapArray::readPixmaps().
All collision masks must be 1-bit images or this function call will
fail.
If the file isn't readable, contains the wrong number of images, or
there is some other error, this function will return FALSE, and the
array will be flagged as invalid; otherwise this function returns TRUE.
See also isValid().
bool QCanvasPixmapArray::readPixmaps ( const QString & filenamepattern, int fc
= 0 )
Reads one or more pixmaps into the pixmap array.
If fc is not 0, filenamepattern should contain "%1", e.g." foo%1.png".
The actual filenames are formed by replacing the %1 with four-digit
integers from 0 to (fc - 1), e.g. foo0000.png, foo0001.png,
foo0002.png, etc.
If fc is 0, filenamepattern is asssumed to be a filename, and the image
contained in this file will be loaded as the first (and only) frame.
If filenamepattern does not exist, is not readable, isn't an image, or
some other error occurs, this function will return FALSE, and isValid()
will return FALSE; otherwise this function will return TRUE.
See also isValid().
void QCanvasPixmapArray::setImage ( int i, QCanvasPixmap * p )
Replaces the pixmap at index i with pixmap p.
The array takes ownership of p and will delete p when the array itself
is deleted.
If i is beyond the end of the array the array is extended to at least
i+1 elements, with elements count() to i-1 being initialized to 0.
SEE ALSO
http://doc.trolltech.com/qcanvaspixmaparray.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
(qcanvaspixmaparray.3qt) and the Qt version (3.3.8).
Trolltech AS 2 February 2007 QCanvasPixmapArray(3qt)
