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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">Q3CanvasPixmapArray Class Reference</h1>

<p>The Q3CanvasPixmapArray class provides an array of Q3CanvasPixmaps. <a href="#details">More...</a></p>

<pre>#include <Q3CanvasPixmapArray></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See the <a href="porting4.html">Porting Guide</a> for more information.</p>

<p>Part of the <a href="qt3support.html">Qt3Support</a> module.</p>

<ul>

<li><a href="q3canvaspixmaparray-members.html">List of all members, including inherited members</a></li>

<li><a href="q3canvaspixmaparray-obsolete.html">Obsolete members</a></li>

</ul>

<h3>Public Functions</h3>

<ul>

<li><div class="fn"/><b><a href="q3canvaspixmaparray.html#Q3CanvasPixmapArray">Q3CanvasPixmapArray</a></b> ()</li>

<li><div class="fn"/><b><a href="q3canvaspixmaparray.html#Q3CanvasPixmapArray-2">Q3CanvasPixmapArray</a></b> ( const QString & <i>datafilenamepattern</i>, int <i>fc</i> = 0 )</li>

<li><div class="fn"/><b><a href="q3canvaspixmaparray.html#Q3CanvasPixmapArray-4">Q3CanvasPixmapArray</a></b> ( Q3ValueList<QPixmap> <i>list</i>, Q3PointArray <i>hotspots</i> = Q3PointArray() )</li>

<li><div class="fn"/><b><a href="q3canvaspixmaparray.html#dtor.Q3CanvasPixmapArray">~Q3CanvasPixmapArray</a></b> ()</li>

<li><div class="fn"/>uint <b><a href="q3canvaspixmaparray.html#count">count</a></b> () const</li>

<li><div class="fn"/>Q3CanvasPixmap * <b><a href="q3canvaspixmaparray.html#image">image</a></b> ( int <i>i</i> ) const</li>

<li><div class="fn"/>bool <b><a href="q3canvaspixmaparray.html#isValid">isValid</a></b> () const</li>

<li><div class="fn"/>bool <b><a href="q3canvaspixmaparray.html#readCollisionMasks">readCollisionMasks</a></b> ( const QString & <i>filename</i> )</li>

<li><div class="fn"/>bool <b><a href="q3canvaspixmaparray.html#readPixmaps">readPixmaps</a></b> ( const QString & <i>filenamepattern</i>, int <i>fc</i> = 0 )</li>

<li><div class="fn"/>void <b><a href="q3canvaspixmaparray.html#setImage">setImage</a></b> ( int <i>i</i>, Q3CanvasPixmap * <i>p</i> )</li>

</ul>

<hr />

<h2>Detailed Description</h2>

<p>The Q3CanvasPixmapArray class provides an array of Q3CanvasPixmaps.</p>

<p>This class is used by <a href="q3canvassprite.html">Q3CanvasSprite</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>

<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 QPixmaps. You can also read in a set of pixmaps after construction using <a href="q3canvaspixmaparray.html#readPixmaps">readPixmaps</a>().</p>

<p>Individual pixmaps can be set with <a href="q3canvaspixmaparray.html#setImage">setImage</a>() and retrieved with <a href="q3canvaspixmaparray.html#image">image</a>(). The number of pixmaps in the array is returned by <a href="q3canvaspixmaparray.html#count">count</a>().</p>

<p><a href="q3canvassprite.html">Q3CanvasSprite</a> uses an image's mask for collision detection. You can change this by reading in a separate set of image masks using <a href="q3canvaspixmaparray.html#readCollisionMasks">readCollisionMasks</a>().</p>

<hr />

<h2>Member Function Documentation</h2>

<h3 class="fn"><a name="Q3CanvasPixmapArray"></a>Q3CanvasPixmapArray::Q3CanvasPixmapArray ()</h3>

<p>Constructs an invalid array (i.e. <a href="q3canvaspixmaparray.html#isValid">isValid</a>() will return false). You must call <a href="q3canvaspixmaparray.html#readPixmaps">readPixmaps</a>() before being able to use this <a href="q3canvaspixmaparray.html">Q3CanvasPixmapArray</a>.</p>

<h3 class="fn"><a name="Q3CanvasPixmapArray-2"></a>Q3CanvasPixmapArray::Q3CanvasPixmapArray ( const <a href="qstring.html">QString</a> & <i>datafilenamepattern</i>, int <i>fc</i> = 0 )</h3>

<p>Constructs a <a href="q3canvaspixmaparray.html">Q3CanvasPixmapArray</a> from files.</p>

<p>The <i>fc</i> parameter sets the number of frames to be loaded for this image.</p>

<p>If <i>fc</i> is not 0, <i>datafilenamepattern</i> 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>

<p>If <i>fc</i> is 0, <i>datafilenamepattern</i> is asssumed to be a filename, and the image contained in this file will be loaded as the first (and only) frame.</p>

<p>If <i>datafilenamepattern</i> does not exist, is not readable, isn't an image, or some other error occurs, the array ends up empty and <a href="q3canvaspixmaparray.html#isValid">isValid</a>() returns false.</p>

<h3 class="fn"><a name="Q3CanvasPixmapArray-4"></a>Q3CanvasPixmapArray::Q3CanvasPixmapArray ( <a href="q3valuelist.html">Q3ValueList</a><<a href="qpixmap.html">QPixmap</a>> <i>list</i>, <a href="q3pointarray.html">Q3PointArray</a> <i>hotspots</i> = Q3PointArray() )</h3>

<p>Constructs a <a href="q3canvaspixmaparray.html">Q3CanvasPixmapArray</a> from the list of QPixmaps in the <i>list</i>. Each pixmap will get a hotspot according to the <i>hotspots</i> array. If no hotspots are specified, each one is set to be at position (0, 0).</p>

<p>If an error occurs, <a href="q3canvaspixmaparray.html#isValid">isValid</a>() will return false.</p>

<h3 class="fn"><a name="dtor.Q3CanvasPixmapArray"></a>Q3CanvasPixmapArray::~Q3CanvasPixmapArray ()</h3>

<p>Destroys the pixmap array and all the pixmaps it contains.</p>

<h3 class="fn"><a name="count"></a><a href="qtglobal.html#uint-typedef">uint</a> Q3CanvasPixmapArray::count () const</h3>

<p>Returns the number of pixmaps in the array.</p>

<h3 class="fn"><a name="image"></a><a href="q3canvaspixmap.html">Q3CanvasPixmap</a> * Q3CanvasPixmapArray::image ( int <i>i</i> ) const</h3>

<p>Returns pixmap <i>i</i> in the array, if <i>i</i> is non-negative and less than than <a href="q3canvaspixmaparray.html#count">count</a>(), and returns an unspecified value otherwise.</p>

<h3 class="fn"><a name="isValid"></a>bool Q3CanvasPixmapArray::isValid () const</h3>

<p>Returns true if the pixmap array is valid; otherwise returns false.</p>

<h3 class="fn"><a name="readCollisionMasks"></a>bool Q3CanvasPixmapArray::readCollisionMasks ( const <a href="qstring.html">QString</a> & <i>filename</i> )</h3>

<p>Reads new collision masks for the array.</p>

<p>By default, <a href="q3canvassprite.html">Q3CanvasSprite</a> uses the image mask of a sprite to detect collisions. Use this function to set your own collision image masks.</p>

<p>If <a href="q3canvaspixmaparray.html#count">count</a>() is 1 <i>filename</i> must specify a real filename to read the mask from. If <a href="q3canvaspixmaparray.html#count">count</a>() is greater than 1, the <i>filename</i> must contain a "%1" that will get replaced by the number of the mask to be loaded, just like <a href="q3canvaspixmaparray.html#readPixmaps">Q3CanvasPixmapArray::readPixmaps</a>().</p>

<p>All collision masks must be 1-bit images or this function call will fail.</p>

<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="q3canvaspixmaparray.html#isValid">isValid</a>().</p>

<h3 class="fn"><a name="readPixmaps"></a>bool Q3CanvasPixmapArray::readPixmaps ( const <a href="qstring.html">QString</a> & <i>filenamepattern</i>, int <i>fc</i> = 0 )</h3>

<p>Reads one or more pixmaps into the pixmap array.</p>

<p>If <i>fc</i> is not 0, <i>filenamepattern</i> 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>

<p>If <i>fc</i> is 0, <i>filenamepattern</i> is asssumed to be a filename, and the image contained in this file will be loaded as the first (and only) frame.</p>

<p>If <i>filenamepattern</i> does not exist, is not readable, isn't an image, or some other error occurs, this function will return false, and <a href="q3canvaspixmaparray.html#isValid">isValid</a>() will return false; otherwise this function will return true.</p>

<p>See also <a href="q3canvaspixmaparray.html#isValid">isValid</a>().</p>

<h3 class="fn"><a name="setImage"></a>void Q3CanvasPixmapArray::setImage ( int <i>i</i>, <a href="q3canvaspixmap.html">Q3CanvasPixmap</a> * <i>p</i> )</h3>

<p>Replaces the pixmap at index <i>i</i> with pixmap <i>p</i>.</p>

<p>The array takes ownership of <i>p</i> and will delete <i>p</i> when the array itself is deleted.</p>

<p>If <i>i</i> is beyond the end of the array the array is extended to at least i+1 elements, with elements <a href="q3canvaspixmaparray.html#count">count</a>() to i-1 being initialized to 0.</p>

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