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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>QMovie Class Reference</h1>
33
34<p>The QMovie class provides incremental loading of animations or images, signalling as it progresses.
35<a href="#details">More...</a>
36<p><tt>#include &lt;<a href="qmovie-h.html">qmovie.h</a>&gt;</tt>
37<p><a href="qmovie-members.html">List of all member functions.</a>
38<h2>Public Members</h2>
39<ul>
40<li class=fn><a href="#QMovie"><b>QMovie</b></a> ()</li>
41<li class=fn><a href="#QMovie-2"><b>QMovie</b></a> ( int&nbsp;bufsize )</li>
42<li class=fn><a href="#QMovie-3"><b>QMovie</b></a> ( QDataSource&nbsp;*&nbsp;src, int&nbsp;bufsize = 1024 )</li>
43<li class=fn><a href="#QMovie-4"><b>QMovie</b></a> ( const&nbsp;QString&nbsp;&amp;&nbsp;fileName, int&nbsp;bufsize = 1024 )</li>
44<li class=fn><a href="#QMovie-5"><b>QMovie</b></a> ( QByteArray&nbsp;data, int&nbsp;bufsize = 1024 )</li>
45<li class=fn><a href="#QMovie-6"><b>QMovie</b></a> ( const&nbsp;QMovie&nbsp;&amp;&nbsp;movie )</li>
46<li class=fn><a href="#~QMovie"><b>~QMovie</b></a> ()</li>
47<li class=fn>QMovie &amp; <a href="#operator-eq"><b>operator=</b></a> ( const&nbsp;QMovie&nbsp;&amp;&nbsp;movie )</li>
48<li class=fn>int <a href="#pushSpace"><b>pushSpace</b></a> () const</li>
49<li class=fn>void <a href="#pushData"><b>pushData</b></a> ( const&nbsp;uchar&nbsp;*&nbsp;data, int&nbsp;length )</li>
50<li class=fn>const QColor &amp; <a href="#backgroundColor"><b>backgroundColor</b></a> () const</li>
51<li class=fn>void <a href="#setBackgroundColor"><b>setBackgroundColor</b></a> ( const&nbsp;QColor&nbsp;&amp;&nbsp;c )</li>
52<li class=fn>const QRect &amp; <a href="#getValidRect"><b>getValidRect</b></a> () const</li>
53<li class=fn>const QPixmap &amp; <a href="#framePixmap"><b>framePixmap</b></a> () const</li>
54<li class=fn>const QImage &amp; <a href="#frameImage"><b>frameImage</b></a> () const</li>
55<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
56<li class=fn>int <a href="#frameNumber"><b>frameNumber</b></a> () const</li>
57<li class=fn>int <a href="#steps"><b>steps</b></a> () const</li>
58<li class=fn>bool <a href="#paused"><b>paused</b></a> () const</li>
59<li class=fn>bool <a href="#finished"><b>finished</b></a> () const</li>
60<li class=fn>bool <a href="#running"><b>running</b></a> () const</li>
61<li class=fn>void <a href="#unpause"><b>unpause</b></a> ()</li>
62<li class=fn>void <a href="#pause"><b>pause</b></a> ()</li>
63<li class=fn>void <a href="#step"><b>step</b></a> ()</li>
64<li class=fn>void <a href="#step-2"><b>step</b></a> ( int&nbsp;steps )</li>
65<li class=fn>void <a href="#restart"><b>restart</b></a> ()</li>
66<li class=fn>int <a href="#speed"><b>speed</b></a> () const</li>
67<li class=fn>void <a href="#setSpeed"><b>setSpeed</b></a> ( int&nbsp;percent )</li>
68<li class=fn>void <a href="#connectResize"><b>connectResize</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )</li>
69<li class=fn>void <a href="#disconnectResize"><b>disconnectResize</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )</li>
70<li class=fn>void <a href="#connectUpdate"><b>connectUpdate</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )</li>
71<li class=fn>void <a href="#disconnectUpdate"><b>disconnectUpdate</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )</li>
72<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>
73<li class=fn>void <a href="#connectStatus"><b>connectStatus</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )</li>
74<li class=fn>void <a href="#disconnectStatus"><b>disconnectStatus</b></a> ( QObject&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )</li>
75</ul>
76<hr><a name="details"></a><h2>Detailed Description</h2>
77
78
79The QMovie class provides incremental loading of animations or images, signalling as it progresses.
80<p>
81
82
83
84<p> The simplest way to display a QMovie is to use a <a href="qlabel.html">QLabel</a> and
85<a href="qlabel.html#setMovie">QLabel::setMovie</a>().
86<p> A QMovie provides a <a href="qpixmap.html">QPixmap</a> as the <a href="#framePixmap">framePixmap</a>(); connections can
87be made via <a href="#connectResize">connectResize</a>() and <a href="#connectUpdate">connectUpdate</a>() to receive
88notification of size and pixmap changes. All decoding is driven
89by the normal event-processing mechanisms.
90<p> The movie begins playing as soon as the QMovie is created
91(actually, once control returns to the event loop). When the last
92frame in the movie has been played, it may loop back to the start
93if such looping is defined in the input source.
94<p> QMovie objects are <a href="shclass.html#explicitly-shared">explicitly shared</a>. This means that a QMovie
95copied from another QMovie will be displaying the same frame at
96all times. If one shared movie pauses, all pause. To make <em>independent</em> movies, they must be constructed separately.
97<p> The set of data formats supported by QMovie is determined by the
98decoder factories that have been installed; the format of the
99input is determined as the input is decoded.
100<p> The supported formats are MNG (if Qt is configured with MNG
101support enabled) and GIF (if Qt is configured with GIF support
102enabled, see qgif.h).
103<p> If Qt is configured to support GIF reading, we are required to
104state that "The Graphics Interchange Format(c) is the Copyright
105property of CompuServe Incorporated. GIF(sm) is a Service Mark
106property of CompuServe Incorporated.
107<p> <b>Warning:</b> If you are in a country that recognizes software patents
108and in which Unisys holds a patent on LZW compression and/or
109decompression and you want to use GIF, Unisys may require you to
110license that technology. Such countries include Canada, Japan,
111the USA, France, Germany, Italy and the UK.
112<p> GIF support may be removed completely in a future version of Qt.
113We recommend using the MNG or PNG format.
114<p> <center><img src="qmovie.png" alt="QMovie"></center>
115<p> <p>See also <a href="qlabel.html#setMovie">QLabel::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>.
116
117<hr><h2>Member Type Documentation</h2>
118<h3 class=fn><a name="Status-enum"></a>QMovie::Status</h3>
119
120<ul>
121<li><tt>QMovie::SourceEmpty</tt>
122<li><tt>QMovie::UnrecognizedFormat</tt>
123<li><tt>QMovie::Paused</tt>
124<li><tt>QMovie::EndOfFrame</tt>
125<li><tt>QMovie::EndOfLoop</tt>
126<li><tt>QMovie::EndOfMovie</tt>
127<li><tt>QMovie::SpeedChanged</tt>
128</ul>
129<hr><h2>Member Function Documentation</h2>
130<h3 class=fn><a name="QMovie"></a>QMovie::QMovie ()
131</h3>
132Constructs a null QMovie. The only interesting thing to do with
133such a movie is to assign another movie to it.
134<p> <p>See also <a href="#isNull">isNull</a>().
135
136<h3 class=fn><a name="QMovie-2"></a>QMovie::QMovie ( int&nbsp;bufsize )
137</h3>
138Constructs a QMovie with an external data source. You should later
139call <a href="#pushData">pushData</a>() to send incoming animation data to the movie.
140<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
141will transfer from the data source per event loop. The lower this
142value, the better interleaved the movie playback will be with
143other event processing, but the slower the overall processing will
144be.
145<p> <p>See also <a href="#pushData">pushData</a>().
146
147<h3 class=fn><a name="QMovie-3"></a>QMovie::QMovie ( <a href="qdatasource.html">QDataSource</a>&nbsp;*&nbsp;src, int&nbsp;bufsize = 1024 )
148</h3>
149Constructs a QMovie that reads an image sequence from the given
150data source, <em>src</em>. The source must be allocated dynamically,
151because QMovie will take ownership of it and will destroy it when
152the movie is destroyed. The movie starts playing as soon as event
153processing continues.
154<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
155will transfer from the data source per event loop. The lower this
156value, the better interleaved the movie playback will be with
157other event processing, but the slower the overall processing will
158be.
159
160<h3 class=fn><a name="QMovie-4"></a>QMovie::QMovie ( const&nbsp;<a href="qstring.html">QString</a>&nbsp;&amp;&nbsp;fileName, int&nbsp;bufsize = 1024 )
161</h3>
162Constructs a QMovie that reads an image sequence from the file, <em>fileName</em>.
163<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
164will transfer from the data source per event loop. The lower this
165value, the better interleaved the movie playback will be with
166other event processing, but the slower the overall processing will
167be.
168
169<h3 class=fn><a name="QMovie-5"></a>QMovie::QMovie ( <a href="qbytearray.html">QByteArray</a>&nbsp;data, int&nbsp;bufsize = 1024 )
170</h3>
171Constructs a QMovie that reads an image sequence from the byte
172array, <em>data</em>.
173<p> The <em>bufsize</em> argument sets the maximum amount of data the movie
174will transfer from the data source per event loop. The lower this
175value, the better interleaved the movie playback will be with
176other event processing, but the slower the overall processing will
177be.
178
179<h3 class=fn><a name="QMovie-6"></a>QMovie::QMovie ( const&nbsp;<a href="qmovie.html">QMovie</a>&nbsp;&amp;&nbsp;movie )
180</h3>
181Constructs a movie that uses the same data as movie <em>movie</em>.
182QMovies use <a href="shclass.html#explicit-sharing">explicit sharing</a>, so operations on the copy will
183affect both.
184
185<h3 class=fn><a name="~QMovie"></a>QMovie::~QMovie ()
186</h3>
187Destroys the QMovie. If this is the last reference to the data of
188the movie, the data is deallocated.
189
190<h3 class=fn>const&nbsp;<a href="qcolor.html">QColor</a>&nbsp;&amp; <a name="backgroundColor"></a>QMovie::backgroundColor () const
191</h3>
192Returns the background color of the movie set by
193<a href="#setBackgroundColor">setBackgroundColor</a>().
194
195<h3 class=fn>void <a name="connectResize"></a>QMovie::connectResize ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )
196</h3>
197Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const QSize&amp;)</tt> so that it is signalled when the movie changes size.
198<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
199connections persist until they are explicitly disconnected with
200<a href="#disconnectResize">disconnectResize</a>() or until <em>every</em> shared copy of the movie is
201deleted.
202
203<p>Example: <a href="movies-example.html#x498">movies/main.cpp</a>.
204<h3 class=fn>void <a name="connectStatus"></a>QMovie::connectStatus ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )
205</h3>
206Connects the <em>receiver</em>'s <em>member</em>, of type <tt>void member(int)</tt> so that it is signalled when the movie changes
207status. The status codes are negative for errors and positive for
208information.
209<p> <center><table cellpadding="4" cellspacing="2" border="0">
210<tr bgcolor="#a2c511"> <th valign="top">Status Code <th valign="top">Meaning
211<tr bgcolor="#f0f0f0"> <td valign="top">QMovie::SourceEmpty
212<td valign="top">signalled if the input cannot be read.
213<tr bgcolor="#d0d0d0"> <td valign="top">QMovie::UnrecognizedFormat
214<td valign="top">signalled if the input data is unrecognized.
215<tr bgcolor="#f0f0f0"> <td valign="top">QMovie::Paused
216<td valign="top">signalled when the movie is paused by a call to <a href="#paused">paused</a>()
217or by after <a href="#step">stepping</a> pauses.
218<tr bgcolor="#d0d0d0"> <td valign="top">QMovie::EndOfFrame
219<td valign="top">signalled at end-of-frame after any update and Paused signals.
220<tr bgcolor="#f0f0f0"> <td valign="top">QMovie::EndOfLoop
221<td valign="top">signalled at end-of-loop, after any update signals,
222EndOfFrame - but before EndOfMovie.
223<tr bgcolor="#d0d0d0"> <td valign="top">QMovie::EndOfMovie
224<td valign="top">signalled when the movie completes and is not about to loop.
225</table></center>
226<p> More status messages may be added in the future, so a general test
227for errors would test for negative.
228<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
229connections persist until they are explicitly disconnected with
230<a href="#disconnectStatus">disconnectStatus</a>() or until <em>every</em> shared copy of the movie is
231deleted.
232
233<p>Example: <a href="movies-example.html#x499">movies/main.cpp</a>.
234<h3 class=fn>void <a name="connectUpdate"></a>QMovie::connectUpdate ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member )
235</h3>
236Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const QRect&amp;)</tt> so that it is signalled when an area of the <a href="#framePixmap">framePixmap</a>()
237has changed since the previous frame.
238<p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
239connections persist until they are explicitly disconnected with
240<a href="#disconnectUpdate">disconnectUpdate</a>() or until <em>every</em> shared copy of the movie is
241deleted.
242
243<p>Example: <a href="movies-example.html#x500">movies/main.cpp</a>.
244<h3 class=fn>void <a name="disconnectResize"></a>QMovie::disconnectResize ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )
245</h3>
246Disconnects 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>().
247
248<h3 class=fn>void <a name="disconnectStatus"></a>QMovie::disconnectStatus ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )
249</h3>
250Disconnects 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>().
251
252<h3 class=fn>void <a name="disconnectUpdate"></a>QMovie::disconnectUpdate ( <a href="qobject.html">QObject</a>&nbsp;*&nbsp;receiver, const&nbsp;char&nbsp;*&nbsp;member = 0 )
253</h3>
254Disconnects the <em>receiver</em>'s <em>member</em> (or all members if \q
255member is zero) that were previously connected by <a href="#connectUpdate">connectUpdate</a>().
256
257<h3 class=fn>bool <a name="finished"></a>QMovie::finished () const
258</h3>
259Returns TRUE if the image is no longer playing: this happens when
260all loops of all frames are complete; otherwise returns FALSE.
261
262<p>Example: <a href="movies-example.html#x501">movies/main.cpp</a>.
263<h3 class=fn>const&nbsp;<a href="qimage.html">QImage</a>&nbsp;&amp; <a name="frameImage"></a>QMovie::frameImage () const
264</h3>
265Returns the current frame of the movie, as a <a href="qimage.html">QImage</a>. It is not
266generally useful to keep a copy of this image. Also note that you
267must not call this function if the movie is <a href="#finished">finished</a>(), since by
268then the image will not be available.
269<p> <p>See also <a href="#framePixmap">framePixmap</a>().
270
271<h3 class=fn>int <a name="frameNumber"></a>QMovie::frameNumber () const
272</h3>
273Returns the number of times EndOfFrame has been emitted since the
274start of the current loop of the movie. Thus, before any
275EndOfFrame has been emitted the value will be 0; within slots
276processing the first signal, <a href="#frameNumber">frameNumber</a>() will be 1, and so on.
277
278<h3 class=fn>const&nbsp;<a href="qpixmap.html">QPixmap</a>&nbsp;&amp; <a name="framePixmap"></a>QMovie::framePixmap () const
279</h3>
280Returns the current frame of the movie, as a <a href="qpixmap.html">QPixmap</a>. It is not
281generally useful to keep a copy of this pixmap. It is better to
282keep a copy of the QMovie and get the <a href="#framePixmap">framePixmap</a>() only when
283needed for drawing.
284<p> <p>See also <a href="#frameImage">frameImage</a>().
285
286<p>Example: <a href="movies-example.html#x502">movies/main.cpp</a>.
287<h3 class=fn>const&nbsp;<a href="qrect.html">QRect</a>&nbsp;&amp; <a name="getValidRect"></a>QMovie::getValidRect () const
288</h3>
289Returns the area of the pixmap for which pixels have been
290generated.
291
292<h3 class=fn>bool <a name="isNull"></a>QMovie::isNull () const
293</h3>
294Returns TRUE if the movie is null; otherwise returns FALSE.
295
296<h3 class=fn><a href="qmovie.html">QMovie</a>&nbsp;&amp; <a name="operator-eq"></a>QMovie::operator= ( const&nbsp;<a href="qmovie.html">QMovie</a>&nbsp;&amp;&nbsp;movie )
297</h3>
298Makes this movie use the same data as movie <em>movie</em>. QMovies use
299<a href="shclass.html#explicit-sharing">explicit sharing</a>.
300
301<h3 class=fn>void <a name="pause"></a>QMovie::pause ()
302</h3>
303Pauses the progress of the animation.
304<p> <p>See also <a href="#unpause">unpause</a>().
305
306<p>Example: <a href="movies-example.html#x503">movies/main.cpp</a>.
307<h3 class=fn>bool <a name="paused"></a>QMovie::paused () const
308</h3>
309Returns TRUE if the image is paused; otherwise returns FALSE.
310
311<p>Example: <a href="movies-example.html#x504">movies/main.cpp</a>.
312<h3 class=fn>void <a name="pushData"></a>QMovie::pushData ( const&nbsp;uchar&nbsp;*&nbsp;data, int&nbsp;length )
313</h3>
314Pushes <em>length</em> bytes from <em>data</em> into the movie. <em>length</em> must
315be no more than the amount returned by <a href="#pushSpace">pushSpace</a>() since the
316previous call to <a href="#pushData">pushData</a>().
317
318<h3 class=fn>int <a name="pushSpace"></a>QMovie::pushSpace () const
319</h3>
320Returns the maximum amount of data that can currently be pushed
321into the movie by a call to <a href="#pushData">pushData</a>(). This is affected by the
322initial buffer size, but varies as the movie plays and data is
323consumed.
324
325<h3 class=fn>void <a name="restart"></a>QMovie::restart ()
326</h3>
327Rewinds the movie to the beginning. If the movie has not been
328paused, it begins playing again.
329
330<p>Example: <a href="movies-example.html#x505">movies/main.cpp</a>.
331<h3 class=fn>bool <a name="running"></a>QMovie::running () const
332</h3>
333Returns TRUE if the image is not single-stepping, not paused, and
334not finished; otherwise returns FALSE.
335
336<h3 class=fn>void <a name="setBackgroundColor"></a>QMovie::setBackgroundColor ( const&nbsp;<a href="qcolor.html">QColor</a>&nbsp;&amp;&nbsp;c )
337</h3>
338Sets the background color of the pixmap to <em>c</em>. If the background
339color isValid(), the pixmap will never have a mask because the
340background color will be used in transparent regions of the image.
341<p> <p>See also <a href="#backgroundColor">backgroundColor</a>().
342
343<h3 class=fn>void <a name="setSpeed"></a>QMovie::setSpeed ( int&nbsp;percent )
344</h3>
345Sets the movie's play speed as a percentage, to <em>percent</em>. This
346is a percentage of the speed dictated by the input data format.
347The default is 100 percent.
348
349<h3 class=fn>int <a name="speed"></a>QMovie::speed () const
350</h3>
351Returns the movie's play speed as a percentage. The default is 100
352percent.
353<p> <p>See also <a href="#setSpeed">setSpeed</a>().
354
355<h3 class=fn>void <a name="step"></a>QMovie::step ()
356</h3>
357Steps forward 1 frame and then pauses.
358
359<p>Example: <a href="movies-example.html#x506">movies/main.cpp</a>.
360<h3 class=fn>void <a name="step-2"></a>QMovie::step ( int&nbsp;steps )
361</h3>
362This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
363<p> Steps forward, showing <em>steps</em> frames, and then pauses.
364
365<h3 class=fn>int <a name="steps"></a>QMovie::steps () const
366</h3>
367Returns the number of steps remaining after a call to <a href="#step">step</a>(). If
368the movie is paused, <a href="#steps">steps</a>() returns 0. If it's running normally
369or is finished, steps() returns a negative number.
370
371<p>Example: <a href="movies-example.html#x507">movies/main.cpp</a>.
372<h3 class=fn>void <a name="unpause"></a>QMovie::unpause ()
373</h3>
374Unpauses the progress of the animation.
375<p> <p>See also <a href="#pause">pause</a>().
376
377<p>Example: <a href="movies-example.html#x508">movies/main.cpp</a>.
378<!-- eof -->
379<hr><p>
380This file is part of the <a href="index.html">Qt toolkit</a>.
381Copyright &copy; 1995-2007
382<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
383<table width=100% cellspacing=0 border=0><tr>
384<td>Copyright &copy; 2007
385<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
386<td align=right><div align=right>Qt 3.3.8</div>
387</table></div></address></body>
388</html>
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