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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQCanvasPixmapArray Class Reference< br > < small > [< a href = "canvas.html" > canvas module< / a > ]< / small > < / h1 >
< p > The TQCanvasPixmapArray class provides an array of TQCanvasPixmaps.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qcanvas-h.html" > ntqcanvas.h< / a > > < / tt >
< p > < a href = "qcanvaspixmaparray-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQCanvasPixmapArray" > < b > TQCanvasPixmapArray< / b > < / a > ()< / li >
< li class = fn > < a href = "#TQCanvasPixmapArray-2" > < b > TQCanvasPixmapArray< / b > < / a > ( const TQString & datafilenamepattern, int fc = 0 )< / li >
< li class = fn > TQCanvasPixmapArray ( TQPtrList< TQPixmap> list, TQPtrList< TQPoint> hotspots ) < em > (obsolete)< / em > < / li >
< li class = fn > < a href = "#TQCanvasPixmapArray-4" > < b > TQCanvasPixmapArray< / b > < / a > ( TQValueList< TQPixmap> list, TQPointArray hotspots = TQPointArray ( ) )< / li >
< li class = fn > < a href = "#~TQCanvasPixmapArray" > < b > ~TQCanvasPixmapArray< / b > < / a > ()< / li >
< li class = fn > bool < a href = "#readPixmaps" > < b > readPixmaps< / b > < / a > ( const TQString & filenamepattern, int fc = 0 )< / li >
< li class = fn > bool < a href = "#readCollisionMasks" > < b > readCollisionMasks< / b > < / a > ( const TQString & filename )< / li >
< li class = fn > bool operator! () < em > (obsolete)< / em > < / li >
< li class = fn > bool < a href = "#isValid" > < b > isValid< / b > < / a > () const< / li >
< li class = fn > TQCanvasPixmap * < a href = "#image" > < b > image< / b > < / a > ( int i ) const< / li >
< li class = fn > void < a href = "#setImage" > < b > setImage< / b > < / a > ( int i, TQCanvasPixmap * p )< / li >
< li class = fn > uint < a href = "#count" > < b > count< / b > < / a > () const< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQCanvasPixmapArray class provides an array of TQCanvasPixmaps.
< p >
< p > This class is used by < a href = "qcanvassprite.html" > TQCanvasSprite< / a > 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.
< p > 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 TQPixmaps. You can also
read in a set of pixmaps after construction using < a href = "#readPixmaps" > readPixmaps< / a > ().
< p > Individual pixmaps can be set with < a href = "#setImage" > setImage< / a > () and retrieved with
< a href = "#image" > image< / a > (). The number of pixmaps in the array is returned by
< a href = "#count" > count< / a > ().
< p > TQCanvasSprite uses an image's mask for collision detection. You
can change this by reading in a separate set of image masks using
< a href = "#readCollisionMasks" > readCollisionMasks< / a > ().
< p > < p > See also < a href = "graphics.html" > Graphics Classes< / a > and < a href = "images.html" > Image Processing Classes< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQCanvasPixmapArray" > < / a > TQCanvasPixmapArray::TQCanvasPixmapArray ()
< / h3 >
Constructs an invalid array (i.e. < a href = "#isValid" > isValid< / a > () will return FALSE).
You must call < a href = "#readPixmaps" > readPixmaps< / a > () before being able to use this
TQCanvasPixmapArray.
< h3 class = fn > < a name = "TQCanvasPixmapArray-2" > < / a > TQCanvasPixmapArray::TQCanvasPixmapArray ( const < a href = "ntqstring.html" > TQString< / a > & datafilenamepattern, int fc = 0 )
< / h3 >
Constructs a TQCanvasPixmapArray from files.
< p > The < em > fc< / em > parameter sets the number of frames to be loaded for
this image.
< p > If < em > fc< / em > is not 0, < em > datafilenamepattern< / em > 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.
< p > If < em > fc< / em > is 0, < em > datafilenamepattern< / em > is asssumed to be a
filename, and the image contained in this file will be loaded as
the first (and only) frame.
< p > If < em > datafilenamepattern< / em > does not exist, is not readable, isn't
an image, or some other error occurs, the array ends up empty and
< a href = "#isValid" > isValid< / a > () returns FALSE.
< h3 class = fn > < a name = "TQCanvasPixmapArray-3" > < / a > TQCanvasPixmapArray::TQCanvasPixmapArray ( < a href = "ntqptrlist.html" > TQPtrList< / a > < TQPixmap> list, < a href = "ntqptrlist.html" > TQPtrList< / a > < TQPoint> hotspots )
< / h3 >
< b > This function is obsolete.< / b > It is provided to keep old source working. We strongly advise against using it in new code.
< p > Use < a href = "#TQCanvasPixmapArray" > TQCanvasPixmapArray::TQCanvasPixmapArray< / a > ( < a href = "ntqvaluelist.html" > TQValueList< / a > < TQPixmap > , < a href = "ntqpointarray.html" > TQPointArray< / a > )
instead.
< p > Constructs a TQCanvasPixmapArray from the list of TQPixmaps < em > list< / em > . The < em > hotspots< / em > list has to be of the same size as < em > list< / em > .
< h3 class = fn > < a name = "TQCanvasPixmapArray-4" > < / a > TQCanvasPixmapArray::TQCanvasPixmapArray ( < a href = "ntqvaluelist.html" > TQValueList< / a > < TQPixmap> list, < a href = "ntqpointarray.html" > TQPointArray< / a > hotspots = TQPointArray ( ) )
< / h3 >
Constructs a TQCanvasPixmapArray from the list of TQPixmaps in the
< em > list< / em > . Each pixmap will get a hotspot according to the < em > hotspots< / em > array. If no hotspots are specified, each one is set to
be at position (0, 0).
< p > If an error occurs, < a href = "#isValid" > isValid< / a > () will return FALSE.
< h3 class = fn > < a name = "~TQCanvasPixmapArray" > < / a > TQCanvasPixmapArray::~TQCanvasPixmapArray ()
< / h3 >
Destroys the pixmap array and all the pixmaps it contains.
< h3 class = fn > uint < a name = "count" > < / a > TQCanvasPixmapArray::count () const
< / h3 >
< p > Returns the number of pixmaps in the array.
< h3 class = fn > < a href = "qcanvaspixmap.html" > TQCanvasPixmap< / a > * < a name = "image" > < / a > TQCanvasPixmapArray::image ( int i ) const
< / h3 >
< p > Returns pixmap < em > i< / em > in the array, if < em > i< / em > is non-negative and less
than than < a href = "#count" > count< / a > (), and returns an unspecified value otherwise.
< h3 class = fn > bool < a name = "isValid" > < / a > TQCanvasPixmapArray::isValid () const
< / h3 >
Returns TRUE if the pixmap array is valid; otherwise returns
FALSE.
< h3 class = fn > bool < a name = "operator!" > < / a > TQCanvasPixmapArray::operator! ()
< / h3 >
< b > This function is obsolete.< / b > It is provided to keep old source working. We strongly advise against using it in new code.
< p > Use < a href = "#isValid" > isValid< / a > () instead.
< p > This returns FALSE if the array is valid, and TRUE if it is not.
< h3 class = fn > bool < a name = "readCollisionMasks" > < / a > TQCanvasPixmapArray::readCollisionMasks ( const < a href = "ntqstring.html" > TQString< / a > & filename )
< / h3 >
Reads new collision masks for the array.
< p > By default, < a href = "qcanvassprite.html" > TQCanvasSprite< / a > uses the image mask of a sprite to
detect collisions. Use this function to set your own collision
image masks.
< p > If < a href = "#count" > count< / a > () is 1 < em > filename< / em > must specify a real filename to read
the mask from. If count() is greater than 1, the < em > filename< / em > must
contain a "%1" that will get replaced by the number of the mask to
be loaded, just like < a href = "#readPixmaps" > TQCanvasPixmapArray::readPixmaps< / a > ().
< p > All collision masks must be 1-bit images or this function call
will fail.
< p > 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.
< p > < p > See also < a href = "#isValid" > isValid< / a > ().
< h3 class = fn > bool < a name = "readPixmaps" > < / a > TQCanvasPixmapArray::readPixmaps ( const < a href = "ntqstring.html" > TQString< / a > & filenamepattern, int fc = 0 )
< / h3 >
Reads one or more pixmaps into the pixmap array.
< p > If < em > fc< / em > is not 0, < em > filenamepattern< / em > 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.
< p > If < em > fc< / em > is 0, < em > filenamepattern< / em > is asssumed to be a filename,
and the image contained in this file will be loaded as the first
(and only) frame.
< p > If < em > filenamepattern< / em > does not exist, is not readable, isn't an
image, or some other error occurs, this function will return
FALSE, and < a href = "#isValid" > isValid< / a > () will return FALSE; otherwise this function
will return TRUE.
< p > < p > See also < a href = "#isValid" > isValid< / a > ().
< h3 class = fn > void < a name = "setImage" > < / a > TQCanvasPixmapArray::setImage ( int i, < a href = "qcanvaspixmap.html" > TQCanvasPixmap< / a > * p )
< / h3 >
Replaces the pixmap at index < em > i< / em > with pixmap < em > p< / em > .
< p > The array takes ownership of < em > p< / em > and will delete < em > p< / em > when the
array itself is deleted.
< p > If < em > i< / em > is beyond the end of the array the array is extended to at
least i+1 elements, with elements < a href = "#count" > count< / a > () to i-1 being initialized
to 0.
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