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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QCanvasPixmapArray Class Reference<br><small>[<a href="canvas.html">canvas module</a>]</small></h1>
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| 33 |
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| 34 | <p>The QCanvasPixmapArray class provides an array of QCanvasPixmaps.
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| 35 | <a href="#details">More...</a>
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| 36 | <p><tt>#include <<a href="qcanvas-h.html">qcanvas.h</a>></tt>
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| 37 | <p><a href="qcanvaspixmaparray-members.html">List of all member functions.</a>
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| 38 | <h2>Public Members</h2>
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| 39 | <ul>
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| 40 | <li class=fn><a href="#QCanvasPixmapArray"><b>QCanvasPixmapArray</b></a> ()</li>
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| 41 | <li class=fn><a href="#QCanvasPixmapArray-2"><b>QCanvasPixmapArray</b></a> ( const QString & datafilenamepattern, int fc = 0 )</li>
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| 42 | <li class=fn>QCanvasPixmapArray ( QPtrList<QPixmap> list, QPtrList<QPoint> hotspots ) <em>(obsolete)</em></li>
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| 43 | <li class=fn><a href="#QCanvasPixmapArray-4"><b>QCanvasPixmapArray</b></a> ( QValueList<QPixmap> list, QPointArray hotspots = QPointArray ( ) )</li>
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| 44 | <li class=fn><a href="#~QCanvasPixmapArray"><b>~QCanvasPixmapArray</b></a> ()</li>
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| 45 | <li class=fn>bool <a href="#readPixmaps"><b>readPixmaps</b></a> ( const QString & filenamepattern, int fc = 0 )</li>
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| 46 | <li class=fn>bool <a href="#readCollisionMasks"><b>readCollisionMasks</b></a> ( const QString & filename )</li>
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| 47 | <li class=fn>bool operator! () <em>(obsolete)</em></li>
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| 48 | <li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li>
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| 49 | <li class=fn>QCanvasPixmap * <a href="#image"><b>image</b></a> ( int i ) const</li>
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| 50 | <li class=fn>void <a href="#setImage"><b>setImage</b></a> ( int i, QCanvasPixmap * p )</li>
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| 51 | <li class=fn>uint <a href="#count"><b>count</b></a> () const</li>
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| 52 | </ul>
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| 53 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 54 |
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| 55 |
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| 56 | The QCanvasPixmapArray class provides an array of QCanvasPixmaps.
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| 57 |
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| 58 | <p>
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| 59 |
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| 60 |
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| 61 | <p> This class is used by <a href="qcanvassprite.html">QCanvasSprite</a> to hold an array of pixmaps.
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| 62 | It is used to implement animated sprites, i.e. images that change
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| 63 | over time, with each pixmap in the array holding one frame.
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| 64 | <p> Depending on the constructor you use you can load multiple pixmaps
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| 65 | into the array either from a directory (specifying a wildcard
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| 66 | pattern for the files), or from a list of QPixmaps. You can also
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| 67 | read in a set of pixmaps after construction using <a href="#readPixmaps">readPixmaps</a>().
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| 68 | <p> Individual pixmaps can be set with <a href="#setImage">setImage</a>() and retrieved with
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| 69 | <a href="#image">image</a>(). The number of pixmaps in the array is returned by
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| 70 | <a href="#count">count</a>().
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| 71 | <p> QCanvasSprite uses an image's mask for collision detection. You
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| 72 | can change this by reading in a separate set of image masks using
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| 73 | <a href="#readCollisionMasks">readCollisionMasks</a>().
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| 74 | <p> <p>See also <a href="graphics.html">Graphics Classes</a> and <a href="images.html">Image Processing Classes</a>.
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| 75 |
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| 76 | <hr><h2>Member Function Documentation</h2>
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| 77 | <h3 class=fn><a name="QCanvasPixmapArray"></a>QCanvasPixmapArray::QCanvasPixmapArray ()
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| 78 | </h3>
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| 79 | Constructs an invalid array (i.e. <a href="#isValid">isValid</a>() will return FALSE).
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| 80 | You must call <a href="#readPixmaps">readPixmaps</a>() before being able to use this
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| 81 | QCanvasPixmapArray.
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| 82 |
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| 83 | <h3 class=fn><a name="QCanvasPixmapArray-2"></a>QCanvasPixmapArray::QCanvasPixmapArray ( const <a href="qstring.html">QString</a> & datafilenamepattern, int fc = 0 )
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| 84 | </h3>
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| 85 | Constructs a QCanvasPixmapArray from files.
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| 86 | <p> The <em>fc</em> parameter sets the number of frames to be loaded for
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| 87 | this image.
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| 88 | <p> If <em>fc</em> is not 0, <em>datafilenamepattern</em> should contain "%1",
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| 89 | e.g. "foo%1.png". The actual filenames are formed by replacing the
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| 90 | %1 with four-digit integers from 0 to (fc - 1), e.g. foo0000.png,
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| 91 | foo0001.png, foo0002.png, etc.
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| 92 | <p> If <em>fc</em> is 0, <em>datafilenamepattern</em> is asssumed to be a
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| 93 | filename, and the image contained in this file will be loaded as
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| 94 | the first (and only) frame.
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| 95 | <p> If <em>datafilenamepattern</em> does not exist, is not readable, isn't
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| 96 | an image, or some other error occurs, the array ends up empty and
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| 97 | <a href="#isValid">isValid</a>() returns FALSE.
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| 98 |
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| 99 | <h3 class=fn><a name="QCanvasPixmapArray-3"></a>QCanvasPixmapArray::QCanvasPixmapArray ( <a href="qptrlist.html">QPtrList</a><QPixmap> list, <a href="qptrlist.html">QPtrList</a><QPoint> hotspots )
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| 100 | </h3>
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| 101 | <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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| 102 | <p> Use <a href="#QCanvasPixmapArray">QCanvasPixmapArray::QCanvasPixmapArray</a>( <a href="qvaluelist.html">QValueList</a><QPixmap>, <a href="qpointarray.html">QPointArray</a> )
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| 103 | instead.
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| 104 | <p> Constructs a QCanvasPixmapArray from the list of QPixmaps <em>list</em>. The <em>hotspots</em> list has to be of the same size as <em>list</em>.
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| 105 |
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| 106 | <h3 class=fn><a name="QCanvasPixmapArray-4"></a>QCanvasPixmapArray::QCanvasPixmapArray ( <a href="qvaluelist.html">QValueList</a><QPixmap> list, <a href="qpointarray.html">QPointArray</a> hotspots = QPointArray ( ) )
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| 107 | </h3>
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| 108 | Constructs a QCanvasPixmapArray from the list of QPixmaps in the
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| 109 | <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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| 110 | be at position (0, 0).
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| 111 | <p> If an error occurs, <a href="#isValid">isValid</a>() will return FALSE.
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| 112 |
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| 113 | <h3 class=fn><a name="~QCanvasPixmapArray"></a>QCanvasPixmapArray::~QCanvasPixmapArray ()
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| 114 | </h3>
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| 115 | Destroys the pixmap array and all the pixmaps it contains.
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| 116 |
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| 117 | <h3 class=fn>uint <a name="count"></a>QCanvasPixmapArray::count () const
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| 118 | </h3>
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| 119 |
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| 120 | <p> Returns the number of pixmaps in the array.
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| 121 |
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| 122 | <h3 class=fn><a href="qcanvaspixmap.html">QCanvasPixmap</a> * <a name="image"></a>QCanvasPixmapArray::image ( int i ) const
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| 123 | </h3>
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| 124 |
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| 125 | <p> Returns pixmap <em>i</em> in the array, if <em>i</em> is non-negative and less
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| 126 | than than <a href="#count">count</a>(), and returns an unspecified value otherwise.
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| 127 |
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| 128 | <h3 class=fn>bool <a name="isValid"></a>QCanvasPixmapArray::isValid () const
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| 129 | </h3>
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| 130 | Returns TRUE if the pixmap array is valid; otherwise returns
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| 131 | FALSE.
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| 132 |
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| 133 | <h3 class=fn>bool <a name="operator!"></a>QCanvasPixmapArray::operator! ()
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| 134 | </h3>
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| 135 | <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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| 136 | <p> Use <a href="#isValid">isValid</a>() instead.
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| 137 | <p> This returns FALSE if the array is valid, and TRUE if it is not.
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| 138 |
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| 139 | <h3 class=fn>bool <a name="readCollisionMasks"></a>QCanvasPixmapArray::readCollisionMasks ( const <a href="qstring.html">QString</a> & filename )
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| 140 | </h3>
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| 141 | Reads new collision masks for the array.
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| 142 | <p> By default, <a href="qcanvassprite.html">QCanvasSprite</a> uses the image mask of a sprite to
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| 143 | detect collisions. Use this function to set your own collision
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| 144 | image masks.
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| 145 | <p> If <a href="#count">count</a>() is 1 <em>filename</em> must specify a real filename to read
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| 146 | the mask from. If count() is greater than 1, the <em>filename</em> must
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| 147 | contain a "%1" that will get replaced by the number of the mask to
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| 148 | be loaded, just like <a href="#readPixmaps">QCanvasPixmapArray::readPixmaps</a>().
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| 149 | <p> All collision masks must be 1-bit images or this function call
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| 150 | will fail.
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| 151 | <p> If the file isn't readable, contains the wrong number of images,
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| 152 | or there is some other error, this function will return FALSE, and
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| 153 | the array will be flagged as invalid; otherwise this function
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| 154 | returns TRUE.
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| 155 | <p> <p>See also <a href="#isValid">isValid</a>().
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| 156 |
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| 157 | <h3 class=fn>bool <a name="readPixmaps"></a>QCanvasPixmapArray::readPixmaps ( const <a href="qstring.html">QString</a> & filenamepattern, int fc = 0 )
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| 158 | </h3>
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| 159 | Reads one or more pixmaps into the pixmap array.
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| 160 | <p> If <em>fc</em> is not 0, <em>filenamepattern</em> should contain "%1", e.g.
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| 161 | "foo%1.png". The actual filenames are formed by replacing the %1
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| 162 | with four-digit integers from 0 to (fc - 1), e.g. foo0000.png,
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| 163 | foo0001.png, foo0002.png, etc.
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| 164 | <p> If <em>fc</em> is 0, <em>filenamepattern</em> is asssumed to be a filename,
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| 165 | and the image contained in this file will be loaded as the first
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| 166 | (and only) frame.
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| 167 | <p> If <em>filenamepattern</em> does not exist, is not readable, isn't an
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| 168 | image, or some other error occurs, this function will return
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| 169 | FALSE, and <a href="#isValid">isValid</a>() will return FALSE; otherwise this function
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| 170 | will return TRUE.
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| 171 | <p> <p>See also <a href="#isValid">isValid</a>().
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| 172 |
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| 173 | <h3 class=fn>void <a name="setImage"></a>QCanvasPixmapArray::setImage ( int i, <a href="qcanvaspixmap.html">QCanvasPixmap</a> * p )
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| 174 | </h3>
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| 175 | Replaces the pixmap at index <em>i</em> with pixmap <em>p</em>.
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| 176 | <p> The array takes ownership of <em>p</em> and will delete <em>p</em> when the
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| 177 | array itself is deleted.
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| 178 | <p> If <em>i</em> is beyond the end of the array the array is extended to at
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| 179 | least i+1 elements, with elements <a href="#count">count</a>() to i-1 being initialized
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| 180 | to 0.
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| 181 |
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| 182 | <!-- eof -->
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| 183 | <hr><p>
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| 184 | This file is part of the <a href="index.html">Qt toolkit</a>.
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| 185 | Copyright © 1995-2007
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| 186 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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| 187 | <table width=100% cellspacing=0 border=0><tr>
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| 188 | <td>Copyright © 2007
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| 189 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 190 | <td align=right><div align=right>Qt 3.3.8</div>
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| 191 | </table></div></address></body>
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| 192 | </html>
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