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389 lines
21 KiB
389 lines
21 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qmovie.cpp:61 -->
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>TQMovie Class</title>
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<font color="#004faf">Home</font></a>
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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>TQMovie Class Reference</h1>
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<p>The TQMovie class provides incremental loading of animations or images, signalling as it progresses.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qmovie-h.html">ntqmovie.h</a>></tt>
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<p><a href="qmovie-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="#TQMovie"><b>TQMovie</b></a> ()</li>
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<li class=fn><a href="#TQMovie-2"><b>TQMovie</b></a> ( int bufsize )</li>
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<li class=fn><a href="#TQMovie-3"><b>TQMovie</b></a> ( TQDataSource * src, int bufsize = 1024 )</li>
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<li class=fn><a href="#TQMovie-4"><b>TQMovie</b></a> ( const TQString & fileName, int bufsize = 1024 )</li>
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<li class=fn><a href="#TQMovie-5"><b>TQMovie</b></a> ( TQByteArray data, int bufsize = 1024 )</li>
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<li class=fn><a href="#TQMovie-6"><b>TQMovie</b></a> ( const TQMovie & movie )</li>
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<li class=fn><a href="#~TQMovie"><b>~TQMovie</b></a> ()</li>
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<li class=fn>TQMovie & <a href="#operator-eq"><b>operator=</b></a> ( const TQMovie & movie )</li>
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<li class=fn>int <a href="#pushSpace"><b>pushSpace</b></a> () const</li>
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<li class=fn>void <a href="#pushData"><b>pushData</b></a> ( const uchar * data, int length )</li>
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<li class=fn>const TQColor & <a href="#backgroundColor"><b>backgroundColor</b></a> () const</li>
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<li class=fn>void <a href="#setBackgroundColor"><b>setBackgroundColor</b></a> ( const TQColor & c )</li>
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<li class=fn>const TQRect & <a href="#getValidRect"><b>getValidRect</b></a> () const</li>
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<li class=fn>const TQPixmap & <a href="#framePixmap"><b>framePixmap</b></a> () const</li>
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<li class=fn>const TQImage & <a href="#frameImage"><b>frameImage</b></a> () const</li>
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<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
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<li class=fn>int <a href="#frameNumber"><b>frameNumber</b></a> () const</li>
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<li class=fn>int <a href="#steps"><b>steps</b></a> () const</li>
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<li class=fn>bool <a href="#paused"><b>paused</b></a> () const</li>
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<li class=fn>bool <a href="#finished"><b>finished</b></a> () const</li>
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<li class=fn>bool <a href="#running"><b>running</b></a> () const</li>
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<li class=fn>void <a href="#unpause"><b>unpause</b></a> ()</li>
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<li class=fn>void <a href="#pause"><b>pause</b></a> ()</li>
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<li class=fn>void <a href="#step"><b>step</b></a> ()</li>
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<li class=fn>void <a href="#step-2"><b>step</b></a> ( int steps )</li>
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<li class=fn>void <a href="#restart"><b>restart</b></a> ()</li>
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<li class=fn>int <a href="#speed"><b>speed</b></a> () const</li>
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<li class=fn>void <a href="#setSpeed"><b>setSpeed</b></a> ( int percent )</li>
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<li class=fn>void <a href="#connectResize"><b>connectResize</b></a> ( TQObject * receiver, const char * member )</li>
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<li class=fn>void <a href="#disconnectResize"><b>disconnectResize</b></a> ( TQObject * receiver, const char * member = 0 )</li>
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<li class=fn>void <a href="#connectUpdate"><b>connectUpdate</b></a> ( TQObject * receiver, const char * member )</li>
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<li class=fn>void <a href="#disconnectUpdate"><b>disconnectUpdate</b></a> ( TQObject * receiver, const char * member = 0 )</li>
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<li class=fn>enum <a href="#Status-enum"><b>Status</b></a> { SourceEmpty = -2, UnrecognizedFormat = -1, Paused = 1, EndOfFrame = 2, EndOfLoop = 3, EndOfMovie = 4, SpeedChanged = 5 }</li>
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<li class=fn>void <a href="#connectStatus"><b>connectStatus</b></a> ( TQObject * receiver, const char * member )</li>
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<li class=fn>void <a href="#disconnectStatus"><b>disconnectStatus</b></a> ( TQObject * receiver, const char * member = 0 )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQMovie class provides incremental loading of animations or images, signalling as it progresses.
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<p>
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<p> The simplest way to display a TQMovie is to use a <a href="ntqlabel.html">TQLabel</a> and
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<a href="ntqlabel.html#setMovie">TQLabel::setMovie</a>().
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<p> A TQMovie provides a <a href="ntqpixmap.html">TQPixmap</a> as the <a href="#framePixmap">framePixmap</a>(); connections can
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be made via <a href="#connectResize">connectResize</a>() and <a href="#connectUpdate">connectUpdate</a>() to receive
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notification of size and pixmap changes. All decoding is driven
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by the normal event-processing mechanisms.
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<p> The movie begins playing as soon as the TQMovie is created
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(actually, once control returns to the event loop). When the last
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frame in the movie has been played, it may loop back to the start
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if such looping is defined in the input source.
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<p> TQMovie objects are <a href="shclass.html#explicitly-shared">explicitly shared</a>. This means that a TQMovie
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copied from another TQMovie will be displaying the same frame at
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all times. If one shared movie pauses, all pause. To make <em>independent</em> movies, they must be constructed separately.
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<p> The set of data formats supported by TQMovie is determined by the
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decoder factories that have been installed; the format of the
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input is determined as the input is decoded.
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<p> The supported formats are MNG (if TQt is configured with MNG
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support enabled) and GIF (if TQt is configured with GIF support
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enabled, see ntqgif.h).
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<p> If TQt is configured to support GIF reading, we are required to
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state that "The Graphics Interchange Format(c) is the Copyright
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property of CompuServe Incorporated. GIF(sm) is a Service Mark
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property of CompuServe Incorporated.
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<p> <b>Warning:</b> If you are in a country that recognizes software patents
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and in which Unisys holds a patent on LZW compression and/or
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decompression and you want to use GIF, Unisys may require you to
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license that technology. Such countries include Canada, Japan,
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the USA, France, Germany, Italy and the UK.
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<p> GIF support may be removed completely in a future version of TQt.
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We recommend using the MNG or PNG format.
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<p> <center><img src="qmovie.png" alt="TQMovie"></center>
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<p> <p>See also <a href="ntqlabel.html#setMovie">TQLabel::setMovie</a>(), <a href="graphics.html">Graphics Classes</a>, <a href="images.html">Image Processing Classes</a>, and <a href="multimedia.html">Multimedia Classes</a>.
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<hr><h2>Member Type Documentation</h2>
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<h3 class=fn><a name="Status-enum"></a>TQMovie::Status</h3>
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<ul>
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<li><tt>TQMovie::SourceEmpty</tt>
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<li><tt>TQMovie::UnrecognizedFormat</tt>
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<li><tt>TQMovie::Paused</tt>
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<li><tt>TQMovie::EndOfFrame</tt>
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<li><tt>TQMovie::EndOfLoop</tt>
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<li><tt>TQMovie::EndOfMovie</tt>
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<li><tt>TQMovie::SpeedChanged</tt>
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</ul>
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQMovie"></a>TQMovie::TQMovie ()
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</h3>
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Constructs a null TQMovie. The only interesting thing to do with
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such a movie is to assign another movie to it.
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<p> <p>See also <a href="#isNull">isNull</a>().
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<h3 class=fn><a name="TQMovie-2"></a>TQMovie::TQMovie ( int bufsize )
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</h3>
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Constructs a TQMovie with an external data source. You should later
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call <a href="#pushData">pushData</a>() to send incoming animation data to the movie.
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<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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will transfer from the data source per event loop. The lower this
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value, the better interleaved the movie playback will be with
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other event processing, but the slower the overall processing will
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be.
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<p> <p>See also <a href="#pushData">pushData</a>().
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<h3 class=fn><a name="TQMovie-3"></a>TQMovie::TQMovie ( <a href="qdatasource.html">TQDataSource</a> * src, int bufsize = 1024 )
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</h3>
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Constructs a TQMovie that reads an image sequence from the given
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data source, <em>src</em>. The source must be allocated dynamically,
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because TQMovie will take ownership of it and will destroy it when
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the movie is destroyed. The movie starts playing as soon as event
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processing continues.
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<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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will transfer from the data source per event loop. The lower this
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value, the better interleaved the movie playback will be with
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other event processing, but the slower the overall processing will
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be.
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<h3 class=fn><a name="TQMovie-4"></a>TQMovie::TQMovie ( const <a href="tqstring.html">TQString</a> & fileName, int bufsize = 1024 )
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</h3>
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Constructs a TQMovie that reads an image sequence from the file, <em>fileName</em>.
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<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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will transfer from the data source per event loop. The lower this
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value, the better interleaved the movie playback will be with
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other event processing, but the slower the overall processing will
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be.
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<h3 class=fn><a name="TQMovie-5"></a>TQMovie::TQMovie ( <a href="qbytearray.html">TQByteArray</a> data, int bufsize = 1024 )
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</h3>
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Constructs a TQMovie that reads an image sequence from the byte
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array, <em>data</em>.
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<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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will transfer from the data source per event loop. The lower this
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value, the better interleaved the movie playback will be with
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other event processing, but the slower the overall processing will
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be.
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<h3 class=fn><a name="TQMovie-6"></a>TQMovie::TQMovie ( const <a href="ntqmovie.html">TQMovie</a> & movie )
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</h3>
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Constructs a movie that uses the same data as movie <em>movie</em>.
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TQMovies use <a href="shclass.html#explicit-sharing">explicit sharing</a>, so operations on the copy will
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affect both.
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<h3 class=fn><a name="~TQMovie"></a>TQMovie::~TQMovie ()
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</h3>
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Destroys the TQMovie. If this is the last reference to the data of
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the movie, the data is deallocated.
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<h3 class=fn>const <a href="ntqcolor.html">TQColor</a> & <a name="backgroundColor"></a>TQMovie::backgroundColor () const
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</h3>
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Returns the background color of the movie set by
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<a href="#setBackgroundColor">setBackgroundColor</a>().
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<h3 class=fn>void <a name="connectResize"></a>TQMovie::connectResize ( <a href="tqobject.html">TQObject</a> * receiver, const char * member )
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</h3>
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Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const TQSize&)</tt> so that it is signalled when the movie changes size.
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<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of TQMovie objects, these
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connections persist until they are explicitly disconnected with
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<a href="#disconnectResize">disconnectResize</a>() or until <em>every</em> shared copy of the movie is
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deleted.
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<p>Example: <a href="movies-example.html#x498">movies/main.cpp</a>.
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<h3 class=fn>void <a name="connectStatus"></a>TQMovie::connectStatus ( <a href="tqobject.html">TQObject</a> * receiver, const char * member )
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</h3>
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Connects the <em>receiver</em>'s <em>member</em>, of type <tt>void member(int)</tt> so that it is signalled when the movie changes
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status. The status codes are negative for errors and positive for
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information.
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<p> <center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#a2c511"> <th valign="top">Status Code <th valign="top">Meaning
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<tr bgcolor="#f0f0f0"> <td valign="top">TQMovie::SourceEmpty
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<td valign="top">signalled if the input cannot be read.
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<tr bgcolor="#d0d0d0"> <td valign="top">TQMovie::UnrecognizedFormat
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<td valign="top">signalled if the input data is unrecognized.
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<tr bgcolor="#f0f0f0"> <td valign="top">TQMovie::Paused
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<td valign="top">signalled when the movie is paused by a call to <a href="#paused">paused</a>()
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or by after <a href="#step">stepping</a> pauses.
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<tr bgcolor="#d0d0d0"> <td valign="top">TQMovie::EndOfFrame
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<td valign="top">signalled at end-of-frame after any update and Paused signals.
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<tr bgcolor="#f0f0f0"> <td valign="top">TQMovie::EndOfLoop
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<td valign="top">signalled at end-of-loop, after any update signals,
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EndOfFrame - but before EndOfMovie.
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<tr bgcolor="#d0d0d0"> <td valign="top">TQMovie::EndOfMovie
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<td valign="top">signalled when the movie completes and is not about to loop.
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</table></center>
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<p> More status messages may be added in the future, so a general test
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for errors would test for negative.
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<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of TQMovie objects, these
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connections persist until they are explicitly disconnected with
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<a href="#disconnectStatus">disconnectStatus</a>() or until <em>every</em> shared copy of the movie is
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deleted.
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<p>Example: <a href="movies-example.html#x499">movies/main.cpp</a>.
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<h3 class=fn>void <a name="connectUpdate"></a>TQMovie::connectUpdate ( <a href="tqobject.html">TQObject</a> * receiver, const char * member )
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</h3>
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Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const TQRect&)</tt> so that it is signalled when an area of the <a href="#framePixmap">framePixmap</a>()
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has changed since the previous frame.
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<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of TQMovie objects, these
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connections persist until they are explicitly disconnected with
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<a href="#disconnectUpdate">disconnectUpdate</a>() or until <em>every</em> shared copy of the movie is
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deleted.
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<p>Example: <a href="movies-example.html#x500">movies/main.cpp</a>.
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<h3 class=fn>void <a name="disconnectResize"></a>TQMovie::disconnectResize ( <a href="tqobject.html">TQObject</a> * receiver, const char * member = 0 )
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</h3>
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Disconnects the <em>receiver</em>'s <em>member</em> (or all members if <em>member</em> is zero) that were previously connected by <a href="#connectResize">connectResize</a>().
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<h3 class=fn>void <a name="disconnectStatus"></a>TQMovie::disconnectStatus ( <a href="tqobject.html">TQObject</a> * receiver, const char * member = 0 )
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</h3>
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Disconnects the <em>receiver</em>'s <em>member</em> (or all members if <em>member</em> is zero) that were previously connected by <a href="#connectStatus">connectStatus</a>().
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<h3 class=fn>void <a name="disconnectUpdate"></a>TQMovie::disconnectUpdate ( <a href="tqobject.html">TQObject</a> * receiver, const char * member = 0 )
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</h3>
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Disconnects the <em>receiver</em>'s <em>member</em> (or all members if \q
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member is zero) that were previously connected by <a href="#connectUpdate">connectUpdate</a>().
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<h3 class=fn>bool <a name="finished"></a>TQMovie::finished () const
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</h3>
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Returns TRUE if the image is no longer playing: this happens when
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all loops of all frames are complete; otherwise returns FALSE.
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<p>Example: <a href="movies-example.html#x501">movies/main.cpp</a>.
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<h3 class=fn>const <a href="tqimage.html">TQImage</a> & <a name="frameImage"></a>TQMovie::frameImage () const
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</h3>
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Returns the current frame of the movie, as a <a href="tqimage.html">TQImage</a>. It is not
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generally useful to keep a copy of this image. Also note that you
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must not call this function if the movie is <a href="#finished">finished</a>(), since by
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then the image will not be available.
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<p> <p>See also <a href="#framePixmap">framePixmap</a>().
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<h3 class=fn>int <a name="frameNumber"></a>TQMovie::frameNumber () const
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</h3>
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Returns the number of times EndOfFrame has been emitted since the
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start of the current loop of the movie. Thus, before any
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EndOfFrame has been emitted the value will be 0; within slots
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processing the first signal, <a href="#frameNumber">frameNumber</a>() will be 1, and so on.
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<h3 class=fn>const <a href="ntqpixmap.html">TQPixmap</a> & <a name="framePixmap"></a>TQMovie::framePixmap () const
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</h3>
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Returns the current frame of the movie, as a <a href="ntqpixmap.html">TQPixmap</a>. It is not
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generally useful to keep a copy of this pixmap. It is better to
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keep a copy of the TQMovie and get the <a href="#framePixmap">framePixmap</a>() only when
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needed for drawing.
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<p> <p>See also <a href="#frameImage">frameImage</a>().
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<p>Example: <a href="movies-example.html#x502">movies/main.cpp</a>.
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<h3 class=fn>const <a href="ntqrect.html">TQRect</a> & <a name="getValidRect"></a>TQMovie::getValidRect () const
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</h3>
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Returns the area of the pixmap for which pixels have been
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generated.
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<h3 class=fn>bool <a name="isNull"></a>TQMovie::isNull () const
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</h3>
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Returns TRUE if the movie is null; otherwise returns FALSE.
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<h3 class=fn><a href="ntqmovie.html">TQMovie</a> & <a name="operator-eq"></a>TQMovie::operator= ( const <a href="ntqmovie.html">TQMovie</a> & movie )
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</h3>
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Makes this movie use the same data as movie <em>movie</em>. TQMovies use
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<a href="shclass.html#explicit-sharing">explicit sharing</a>.
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<h3 class=fn>void <a name="pause"></a>TQMovie::pause ()
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</h3>
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Pauses the progress of the animation.
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<p> <p>See also <a href="#unpause">unpause</a>().
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<p>Example: <a href="movies-example.html#x503">movies/main.cpp</a>.
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<h3 class=fn>bool <a name="paused"></a>TQMovie::paused () const
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</h3>
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Returns TRUE if the image is paused; otherwise returns FALSE.
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<p>Example: <a href="movies-example.html#x504">movies/main.cpp</a>.
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<h3 class=fn>void <a name="pushData"></a>TQMovie::pushData ( const uchar * data, int length )
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</h3>
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Pushes <em>length</em> bytes from <em>data</em> into the movie. <em>length</em> must
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be no more than the amount returned by <a href="#pushSpace">pushSpace</a>() since the
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previous call to <a href="#pushData">pushData</a>().
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<h3 class=fn>int <a name="pushSpace"></a>TQMovie::pushSpace () const
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|
</h3>
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Returns the maximum amount of data that can currently be pushed
|
|
into the movie by a call to <a href="#pushData">pushData</a>(). This is affected by the
|
|
initial buffer size, but varies as the movie plays and data is
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|
consumed.
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|
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|
<h3 class=fn>void <a name="restart"></a>TQMovie::restart ()
|
|
</h3>
|
|
Rewinds the movie to the beginning. If the movie has not been
|
|
paused, it begins playing again.
|
|
|
|
<p>Example: <a href="movies-example.html#x505">movies/main.cpp</a>.
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<h3 class=fn>bool <a name="running"></a>TQMovie::running () const
|
|
</h3>
|
|
Returns TRUE if the image is not single-stepping, not paused, and
|
|
not finished; otherwise returns FALSE.
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|
|
|
<h3 class=fn>void <a name="setBackgroundColor"></a>TQMovie::setBackgroundColor ( const <a href="ntqcolor.html">TQColor</a> & c )
|
|
</h3>
|
|
Sets the background color of the pixmap to <em>c</em>. If the background
|
|
color isValid(), the pixmap will never have a mask because the
|
|
background color will be used in transparent regions of the image.
|
|
<p> <p>See also <a href="#backgroundColor">backgroundColor</a>().
|
|
|
|
<h3 class=fn>void <a name="setSpeed"></a>TQMovie::setSpeed ( int percent )
|
|
</h3>
|
|
Sets the movie's play speed as a percentage, to <em>percent</em>. This
|
|
is a percentage of the speed dictated by the input data format.
|
|
The default is 100 percent.
|
|
|
|
<h3 class=fn>int <a name="speed"></a>TQMovie::speed () const
|
|
</h3>
|
|
Returns the movie's play speed as a percentage. The default is 100
|
|
percent.
|
|
<p> <p>See also <a href="#setSpeed">setSpeed</a>().
|
|
|
|
<h3 class=fn>void <a name="step"></a>TQMovie::step ()
|
|
</h3>
|
|
Steps forward 1 frame and then pauses.
|
|
|
|
<p>Example: <a href="movies-example.html#x506">movies/main.cpp</a>.
|
|
<h3 class=fn>void <a name="step-2"></a>TQMovie::step ( int steps )
|
|
</h3>
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
<p> Steps forward, showing <em>steps</em> frames, and then pauses.
|
|
|
|
<h3 class=fn>int <a name="steps"></a>TQMovie::steps () const
|
|
</h3>
|
|
Returns the number of steps remaining after a call to <a href="#step">step</a>(). If
|
|
the movie is paused, <a href="#steps">steps</a>() returns 0. If it's running normally
|
|
or is finished, steps() returns a negative number.
|
|
|
|
<p>Example: <a href="movies-example.html#x507">movies/main.cpp</a>.
|
|
<h3 class=fn>void <a name="unpause"></a>TQMovie::unpause ()
|
|
</h3>
|
|
Unpauses the progress of the animation.
|
|
<p> <p>See also <a href="#pause">pause</a>().
|
|
|
|
<p>Example: <a href="movies-example.html#x508">movies/main.cpp</a>.
|
|
<!-- eof -->
|
|
<hr><p>
|
|
This file is part of the <a href="index.html">TQt toolkit</a>.
|
|
Copyright © 1995-2007
|
|
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
|
<table width=100% cellspacing=0 border=0><tr>
|
|
<td>Copyright © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
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</html>
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