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<title>TQCanvasPixmapArray Class</title>
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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>
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<p>The TQCanvasPixmapArray class provides an array of TQCanvasPixmaps.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qcanvas-h.html">ntqcanvas.h</a>></tt>
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<p><a href="qcanvaspixmaparray-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQCanvasPixmapArray"><b>TQCanvasPixmapArray</b></a> ()</li>
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<li class=fn><a href="#TQCanvasPixmapArray-2"><b>TQCanvasPixmapArray</b></a> ( const TQString & datafilenamepattern, int fc = 0 )</li>
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<li class=fn>TQCanvasPixmapArray ( TQPtrList<TQPixmap> list, TQPtrList<TQPoint> hotspots ) <em>(obsolete)</em></li>
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<li class=fn><a href="#TQCanvasPixmapArray-4"><b>TQCanvasPixmapArray</b></a> ( TQValueList<TQPixmap> list, TQPointArray hotspots = TQPointArray ( ) )</li>
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<li class=fn><a href="#~TQCanvasPixmapArray"><b>~TQCanvasPixmapArray</b></a> ()</li>
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<li class=fn>bool <a href="#readPixmaps"><b>readPixmaps</b></a> ( const TQString & filenamepattern, int fc = 0 )</li>
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<li class=fn>bool <a href="#readCollisionMasks"><b>readCollisionMasks</b></a> ( const TQString & filename )</li>
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<li class=fn>bool operator! () <em>(obsolete)</em></li>
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<li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li>
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<li class=fn>TQCanvasPixmap * <a href="#image"><b>image</b></a> ( int i ) const</li>
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<li class=fn>void <a href="#setImage"><b>setImage</b></a> ( int i, TQCanvasPixmap * p )</li>
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<li class=fn>uint <a href="#count"><b>count</b></a> () const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQCanvasPixmapArray class provides an array of TQCanvasPixmaps.
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<p>
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<p> This class is used by <a href="qcanvassprite.html">TQCanvasSprite</a> to hold an array of pixmaps.
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It is used to implement animated sprites, i.e. images that change
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over time, with each pixmap in the array holding one frame.
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<p> Depending on the constructor you use you can load multiple pixmaps
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into the array either from a directory (specifying a wildcard
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pattern for the files), or from a list of TQPixmaps. You can also
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read in a set of pixmaps after construction using <a href="#readPixmaps">readPixmaps</a>().
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<p> Individual pixmaps can be set with <a href="#setImage">setImage</a>() and retrieved with
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<a href="#image">image</a>(). The number of pixmaps in the array is returned by
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<a href="#count">count</a>().
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<p> TQCanvasSprite uses an image's mask for collision detection. You
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can change this by reading in a separate set of image masks using
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<a href="#readCollisionMasks">readCollisionMasks</a>().
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<p> <p>See also <a href="graphics.html">Graphics Classes</a> and <a href="images.html">Image Processing Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQCanvasPixmapArray"></a>TQCanvasPixmapArray::TQCanvasPixmapArray ()
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</h3>
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Constructs an invalid array (i.e. <a href="#isValid">isValid</a>() will return FALSE).
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You must call <a href="#readPixmaps">readPixmaps</a>() before being able to use this
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TQCanvasPixmapArray.
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<h3 class=fn><a name="TQCanvasPixmapArray-2"></a>TQCanvasPixmapArray::TQCanvasPixmapArray ( const <a href="ntqstring.html">TQString</a> & datafilenamepattern, int fc = 0 )
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</h3>
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Constructs a TQCanvasPixmapArray from files.
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<p> The <em>fc</em> parameter sets the number of frames to be loaded for
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this image.
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<p> If <em>fc</em> is not 0, <em>datafilenamepattern</em> should contain "%1",
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e.g. "foo%1.png". The actual filenames are formed by replacing the
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%1 with four-digit integers from 0 to (fc - 1), e.g. foo0000.png,
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foo0001.png, foo0002.png, etc.
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<p> If <em>fc</em> is 0, <em>datafilenamepattern</em> is asssumed to be a
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filename, and the image contained in this file will be loaded as
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the first (and only) frame.
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<p> If <em>datafilenamepattern</em> does not exist, is not readable, isn't
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an image, or some other error occurs, the array ends up empty and
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<a href="#isValid">isValid</a>() returns FALSE.
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<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 )
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> Use <a href="#TQCanvasPixmapArray">TQCanvasPixmapArray::TQCanvasPixmapArray</a>( <a href="ntqvaluelist.html">TQValueList</a><TQPixmap>, <a href="ntqpointarray.html">TQPointArray</a> )
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instead.
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<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>.
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<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 ( ) )
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</h3>
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Constructs a TQCanvasPixmapArray from the list of TQPixmaps in the
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<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
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be at position (0, 0).
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<p> If an error occurs, <a href="#isValid">isValid</a>() will return FALSE.
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<h3 class=fn><a name="~TQCanvasPixmapArray"></a>TQCanvasPixmapArray::~TQCanvasPixmapArray ()
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</h3>
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Destroys the pixmap array and all the pixmaps it contains.
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<h3 class=fn>uint <a name="count"></a>TQCanvasPixmapArray::count () const
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</h3>
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<p> Returns the number of pixmaps in the array.
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<h3 class=fn><a href="qcanvaspixmap.html">TQCanvasPixmap</a> * <a name="image"></a>TQCanvasPixmapArray::image ( int i ) const
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</h3>
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<p> Returns pixmap <em>i</em> in the array, if <em>i</em> is non-negative and less
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than than <a href="#count">count</a>(), and returns an unspecified value otherwise.
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<h3 class=fn>bool <a name="isValid"></a>TQCanvasPixmapArray::isValid () const
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</h3>
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Returns TRUE if the pixmap array is valid; otherwise returns
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FALSE.
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<h3 class=fn>bool <a name="operator!"></a>TQCanvasPixmapArray::operator! ()
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> Use <a href="#isValid">isValid</a>() instead.
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<p> This returns FALSE if the array is valid, and TRUE if it is not.
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<h3 class=fn>bool <a name="readCollisionMasks"></a>TQCanvasPixmapArray::readCollisionMasks ( const <a href="ntqstring.html">TQString</a> & filename )
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</h3>
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Reads new collision masks for the array.
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<p> By default, <a href="qcanvassprite.html">TQCanvasSprite</a> uses the image mask of a sprite to
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detect collisions. Use this function to set your own collision
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image masks.
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<p> If <a href="#count">count</a>() is 1 <em>filename</em> must specify a real filename to read
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the mask from. If count() is greater than 1, the <em>filename</em> must
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contain a "%1" that will get replaced by the number of the mask to
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be loaded, just like <a href="#readPixmaps">TQCanvasPixmapArray::readPixmaps</a>().
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<p> All collision masks must be 1-bit images or this function call
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will fail.
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<p> If the file isn't readable, contains the wrong number of images,
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or there is some other error, this function will return FALSE, and
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the array will be flagged as invalid; otherwise this function
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returns TRUE.
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<p> <p>See also <a href="#isValid">isValid</a>().
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<h3 class=fn>bool <a name="readPixmaps"></a>TQCanvasPixmapArray::readPixmaps ( const <a href="ntqstring.html">TQString</a> & filenamepattern, int fc = 0 )
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</h3>
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Reads one or more pixmaps into the pixmap array.
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<p> If <em>fc</em> is not 0, <em>filenamepattern</em> should contain "%1", e.g.
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"foo%1.png". The actual filenames are formed by replacing the %1
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with four-digit integers from 0 to (fc - 1), e.g. foo0000.png,
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foo0001.png, foo0002.png, etc.
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<p> If <em>fc</em> is 0, <em>filenamepattern</em> is asssumed to be a filename,
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and the image contained in this file will be loaded as the first
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(and only) frame.
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<p> If <em>filenamepattern</em> does not exist, is not readable, isn't an
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image, or some other error occurs, this function will return
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FALSE, and <a href="#isValid">isValid</a>() will return FALSE; otherwise this function
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will return TRUE.
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<p> <p>See also <a href="#isValid">isValid</a>().
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<h3 class=fn>void <a name="setImage"></a>TQCanvasPixmapArray::setImage ( int i, <a href="qcanvaspixmap.html">TQCanvasPixmap</a> * p )
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</h3>
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Replaces the pixmap at index <em>i</em> with pixmap <em>p</em>.
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<p> The array takes ownership of <em>p</em> and will delete <em>p</em> when the
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array itself is deleted.
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<p> If <em>i</em> is beyond the end of the array the array is extended to at
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least i+1 elements, with elements <a href="#count">count</a>() to i-1 being initialized
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to 0.
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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