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22 | <font color="#004faf">All Classes</font></a>
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24 | <font color="#004faf">Main Classes</font></a>
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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>QMovie Class Reference</h1>
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33 |
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34 | <p>The QMovie class provides incremental loading of animations or images, signalling as it progresses.
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35 | <a href="#details">More...</a>
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36 | <p><tt>#include <<a href="qmovie-h.html">qmovie.h</a>></tt>
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37 | <p><a href="qmovie-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="#QMovie"><b>QMovie</b></a> ()</li>
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41 | <li class=fn><a href="#QMovie-2"><b>QMovie</b></a> ( int bufsize )</li>
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42 | <li class=fn><a href="#QMovie-3"><b>QMovie</b></a> ( QDataSource * src, int bufsize = 1024 )</li>
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43 | <li class=fn><a href="#QMovie-4"><b>QMovie</b></a> ( const QString & fileName, int bufsize = 1024 )</li>
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44 | <li class=fn><a href="#QMovie-5"><b>QMovie</b></a> ( QByteArray data, int bufsize = 1024 )</li>
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45 | <li class=fn><a href="#QMovie-6"><b>QMovie</b></a> ( const QMovie & movie )</li>
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46 | <li class=fn><a href="#~QMovie"><b>~QMovie</b></a> ()</li>
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47 | <li class=fn>QMovie & <a href="#operator-eq"><b>operator=</b></a> ( const QMovie & movie )</li>
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48 | <li class=fn>int <a href="#pushSpace"><b>pushSpace</b></a> () const</li>
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49 | <li class=fn>void <a href="#pushData"><b>pushData</b></a> ( const uchar * data, int length )</li>
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50 | <li class=fn>const QColor & <a href="#backgroundColor"><b>backgroundColor</b></a> () const</li>
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51 | <li class=fn>void <a href="#setBackgroundColor"><b>setBackgroundColor</b></a> ( const QColor & c )</li>
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52 | <li class=fn>const QRect & <a href="#getValidRect"><b>getValidRect</b></a> () const</li>
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53 | <li class=fn>const QPixmap & <a href="#framePixmap"><b>framePixmap</b></a> () const</li>
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54 | <li class=fn>const QImage & <a href="#frameImage"><b>frameImage</b></a> () const</li>
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55 | <li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
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56 | <li class=fn>int <a href="#frameNumber"><b>frameNumber</b></a> () const</li>
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57 | <li class=fn>int <a href="#steps"><b>steps</b></a> () const</li>
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58 | <li class=fn>bool <a href="#paused"><b>paused</b></a> () const</li>
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59 | <li class=fn>bool <a href="#finished"><b>finished</b></a> () const</li>
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60 | <li class=fn>bool <a href="#running"><b>running</b></a> () const</li>
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61 | <li class=fn>void <a href="#unpause"><b>unpause</b></a> ()</li>
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62 | <li class=fn>void <a href="#pause"><b>pause</b></a> ()</li>
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63 | <li class=fn>void <a href="#step"><b>step</b></a> ()</li>
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64 | <li class=fn>void <a href="#step-2"><b>step</b></a> ( int steps )</li>
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65 | <li class=fn>void <a href="#restart"><b>restart</b></a> ()</li>
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66 | <li class=fn>int <a href="#speed"><b>speed</b></a> () const</li>
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67 | <li class=fn>void <a href="#setSpeed"><b>setSpeed</b></a> ( int percent )</li>
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68 | <li class=fn>void <a href="#connectResize"><b>connectResize</b></a> ( QObject * receiver, const char * member )</li>
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69 | <li class=fn>void <a href="#disconnectResize"><b>disconnectResize</b></a> ( QObject * receiver, const char * member = 0 )</li>
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70 | <li class=fn>void <a href="#connectUpdate"><b>connectUpdate</b></a> ( QObject * receiver, const char * member )</li>
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71 | <li class=fn>void <a href="#disconnectUpdate"><b>disconnectUpdate</b></a> ( QObject * receiver, const char * member = 0 )</li>
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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>
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73 | <li class=fn>void <a href="#connectStatus"><b>connectStatus</b></a> ( QObject * receiver, const char * member )</li>
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74 | <li class=fn>void <a href="#disconnectStatus"><b>disconnectStatus</b></a> ( QObject * receiver, const char * member = 0 )</li>
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75 | </ul>
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76 | <hr><a name="details"></a><h2>Detailed Description</h2>
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77 |
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78 |
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79 | The QMovie class provides incremental loading of animations or images, signalling as it progresses.
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80 | <p>
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81 |
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82 |
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83 |
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84 | <p> The simplest way to display a QMovie is to use a <a href="qlabel.html">QLabel</a> and
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85 | <a href="qlabel.html#setMovie">QLabel::setMovie</a>().
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86 | <p> A QMovie provides a <a href="qpixmap.html">QPixmap</a> as the <a href="#framePixmap">framePixmap</a>(); connections can
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87 | be made via <a href="#connectResize">connectResize</a>() and <a href="#connectUpdate">connectUpdate</a>() to receive
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88 | notification of size and pixmap changes. All decoding is driven
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89 | by the normal event-processing mechanisms.
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90 | <p> The movie begins playing as soon as the QMovie is created
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91 | (actually, once control returns to the event loop). When the last
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92 | frame in the movie has been played, it may loop back to the start
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93 | if such looping is defined in the input source.
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94 | <p> QMovie objects are <a href="shclass.html#explicitly-shared">explicitly shared</a>. This means that a QMovie
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95 | copied from another QMovie will be displaying the same frame at
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96 | all times. If one shared movie pauses, all pause. To make <em>independent</em> movies, they must be constructed separately.
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97 | <p> The set of data formats supported by QMovie is determined by the
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98 | decoder factories that have been installed; the format of the
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99 | input is determined as the input is decoded.
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100 | <p> The supported formats are MNG (if Qt is configured with MNG
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101 | support enabled) and GIF (if Qt is configured with GIF support
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102 | enabled, see qgif.h).
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103 | <p> If Qt is configured to support GIF reading, we are required to
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104 | state that "The Graphics Interchange Format(c) is the Copyright
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105 | property of CompuServe Incorporated. GIF(sm) is a Service Mark
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106 | property of CompuServe Incorporated.
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107 | <p> <b>Warning:</b> If you are in a country that recognizes software patents
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108 | and in which Unisys holds a patent on LZW compression and/or
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109 | decompression and you want to use GIF, Unisys may require you to
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110 | license that technology. Such countries include Canada, Japan,
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111 | the USA, France, Germany, Italy and the UK.
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112 | <p> GIF support may be removed completely in a future version of Qt.
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113 | We recommend using the MNG or PNG format.
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114 | <p> <center><img src="qmovie.png" alt="QMovie"></center>
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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>.
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116 |
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117 | <hr><h2>Member Type Documentation</h2>
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118 | <h3 class=fn><a name="Status-enum"></a>QMovie::Status</h3>
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119 |
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120 | <ul>
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121 | <li><tt>QMovie::SourceEmpty</tt>
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122 | <li><tt>QMovie::UnrecognizedFormat</tt>
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123 | <li><tt>QMovie::Paused</tt>
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124 | <li><tt>QMovie::EndOfFrame</tt>
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125 | <li><tt>QMovie::EndOfLoop</tt>
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126 | <li><tt>QMovie::EndOfMovie</tt>
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127 | <li><tt>QMovie::SpeedChanged</tt>
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128 | </ul>
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129 | <hr><h2>Member Function Documentation</h2>
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130 | <h3 class=fn><a name="QMovie"></a>QMovie::QMovie ()
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131 | </h3>
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132 | Constructs a null QMovie. The only interesting thing to do with
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133 | such a movie is to assign another movie to it.
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134 | <p> <p>See also <a href="#isNull">isNull</a>().
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135 |
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136 | <h3 class=fn><a name="QMovie-2"></a>QMovie::QMovie ( int bufsize )
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137 | </h3>
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138 | Constructs a QMovie with an external data source. You should later
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139 | call <a href="#pushData">pushData</a>() to send incoming animation data to the movie.
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140 | <p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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141 | will transfer from the data source per event loop. The lower this
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142 | value, the better interleaved the movie playback will be with
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143 | other event processing, but the slower the overall processing will
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144 | be.
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145 | <p> <p>See also <a href="#pushData">pushData</a>().
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146 |
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147 | <h3 class=fn><a name="QMovie-3"></a>QMovie::QMovie ( <a href="qdatasource.html">QDataSource</a> * src, int bufsize = 1024 )
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148 | </h3>
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149 | Constructs a QMovie that reads an image sequence from the given
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150 | data source, <em>src</em>. The source must be allocated dynamically,
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151 | because QMovie will take ownership of it and will destroy it when
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152 | the movie is destroyed. The movie starts playing as soon as event
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153 | processing continues.
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154 | <p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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155 | will transfer from the data source per event loop. The lower this
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156 | value, the better interleaved the movie playback will be with
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157 | other event processing, but the slower the overall processing will
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158 | be.
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159 |
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160 | <h3 class=fn><a name="QMovie-4"></a>QMovie::QMovie ( const <a href="qstring.html">QString</a> & fileName, int bufsize = 1024 )
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161 | </h3>
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162 | Constructs a QMovie that reads an image sequence from the file, <em>fileName</em>.
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163 | <p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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164 | will transfer from the data source per event loop. The lower this
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165 | value, the better interleaved the movie playback will be with
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166 | other event processing, but the slower the overall processing will
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167 | be.
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168 |
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169 | <h3 class=fn><a name="QMovie-5"></a>QMovie::QMovie ( <a href="qbytearray.html">QByteArray</a> data, int bufsize = 1024 )
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170 | </h3>
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171 | Constructs a QMovie that reads an image sequence from the byte
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172 | array, <em>data</em>.
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173 | <p> The <em>bufsize</em> argument sets the maximum amount of data the movie
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174 | will transfer from the data source per event loop. The lower this
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175 | value, the better interleaved the movie playback will be with
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176 | other event processing, but the slower the overall processing will
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177 | be.
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178 |
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179 | <h3 class=fn><a name="QMovie-6"></a>QMovie::QMovie ( const <a href="qmovie.html">QMovie</a> & movie )
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180 | </h3>
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181 | Constructs a movie that uses the same data as movie <em>movie</em>.
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182 | QMovies use <a href="shclass.html#explicit-sharing">explicit sharing</a>, so operations on the copy will
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183 | affect both.
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184 |
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185 | <h3 class=fn><a name="~QMovie"></a>QMovie::~QMovie ()
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186 | </h3>
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187 | Destroys the QMovie. If this is the last reference to the data of
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188 | the movie, the data is deallocated.
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189 |
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190 | <h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="backgroundColor"></a>QMovie::backgroundColor () const
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191 | </h3>
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192 | Returns the background color of the movie set by
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193 | <a href="#setBackgroundColor">setBackgroundColor</a>().
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194 |
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195 | <h3 class=fn>void <a name="connectResize"></a>QMovie::connectResize ( <a href="qobject.html">QObject</a> * receiver, const char * member )
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196 | </h3>
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197 | Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const QSize&)</tt> so that it is signalled when the movie changes size.
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198 | <p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
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199 | connections persist until they are explicitly disconnected with
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200 | <a href="#disconnectResize">disconnectResize</a>() or until <em>every</em> shared copy of the movie is
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201 | deleted.
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202 |
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203 | <p>Example: <a href="movies-example.html#x498">movies/main.cpp</a>.
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204 | <h3 class=fn>void <a name="connectStatus"></a>QMovie::connectStatus ( <a href="qobject.html">QObject</a> * receiver, const char * member )
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205 | </h3>
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206 | 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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207 | status. The status codes are negative for errors and positive for
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208 | information.
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209 | <p> <center><table cellpadding="4" cellspacing="2" border="0">
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210 | <tr bgcolor="#a2c511"> <th valign="top">Status Code <th valign="top">Meaning
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211 | <tr bgcolor="#f0f0f0"> <td valign="top">QMovie::SourceEmpty
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212 | <td valign="top">signalled if the input cannot be read.
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213 | <tr bgcolor="#d0d0d0"> <td valign="top">QMovie::UnrecognizedFormat
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214 | <td valign="top">signalled if the input data is unrecognized.
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215 | <tr bgcolor="#f0f0f0"> <td valign="top">QMovie::Paused
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216 | <td valign="top">signalled when the movie is paused by a call to <a href="#paused">paused</a>()
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217 | or by after <a href="#step">stepping</a> pauses.
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218 | <tr bgcolor="#d0d0d0"> <td valign="top">QMovie::EndOfFrame
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219 | <td valign="top">signalled at end-of-frame after any update and Paused signals.
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220 | <tr bgcolor="#f0f0f0"> <td valign="top">QMovie::EndOfLoop
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221 | <td valign="top">signalled at end-of-loop, after any update signals,
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222 | EndOfFrame - but before EndOfMovie.
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223 | <tr bgcolor="#d0d0d0"> <td valign="top">QMovie::EndOfMovie
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224 | <td valign="top">signalled when the movie completes and is not about to loop.
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225 | </table></center>
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226 | <p> More status messages may be added in the future, so a general test
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227 | for errors would test for negative.
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228 | <p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
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229 | connections persist until they are explicitly disconnected with
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230 | <a href="#disconnectStatus">disconnectStatus</a>() or until <em>every</em> shared copy of the movie is
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231 | deleted.
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232 |
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233 | <p>Example: <a href="movies-example.html#x499">movies/main.cpp</a>.
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234 | <h3 class=fn>void <a name="connectUpdate"></a>QMovie::connectUpdate ( <a href="qobject.html">QObject</a> * receiver, const char * member )
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235 | </h3>
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236 | Connects the <em>receiver</em>'s <em>member</em> of type <tt>void member(const QRect&)</tt> so that it is signalled when an area of the <a href="#framePixmap">framePixmap</a>()
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237 | has changed since the previous frame.
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238 | <p> Note that due to the <a href="shclass.html#explicit-sharing">explicit sharing</a> of QMovie objects, these
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239 | connections persist until they are explicitly disconnected with
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240 | <a href="#disconnectUpdate">disconnectUpdate</a>() or until <em>every</em> shared copy of the movie is
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241 | deleted.
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242 |
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243 | <p>Example: <a href="movies-example.html#x500">movies/main.cpp</a>.
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244 | <h3 class=fn>void <a name="disconnectResize"></a>QMovie::disconnectResize ( <a href="qobject.html">QObject</a> * receiver, const char * member = 0 )
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245 | </h3>
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246 | 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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247 |
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248 | <h3 class=fn>void <a name="disconnectStatus"></a>QMovie::disconnectStatus ( <a href="qobject.html">QObject</a> * receiver, const char * member = 0 )
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249 | </h3>
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250 | 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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251 |
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252 | <h3 class=fn>void <a name="disconnectUpdate"></a>QMovie::disconnectUpdate ( <a href="qobject.html">QObject</a> * receiver, const char * member = 0 )
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253 | </h3>
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254 | Disconnects the <em>receiver</em>'s <em>member</em> (or all members if \q
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255 | member is zero) that were previously connected by <a href="#connectUpdate">connectUpdate</a>().
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256 |
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257 | <h3 class=fn>bool <a name="finished"></a>QMovie::finished () const
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258 | </h3>
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259 | Returns TRUE if the image is no longer playing: this happens when
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260 | all loops of all frames are complete; otherwise returns FALSE.
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261 |
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262 | <p>Example: <a href="movies-example.html#x501">movies/main.cpp</a>.
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263 | <h3 class=fn>const <a href="qimage.html">QImage</a> & <a name="frameImage"></a>QMovie::frameImage () const
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264 | </h3>
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265 | Returns the current frame of the movie, as a <a href="qimage.html">QImage</a>. It is not
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266 | generally useful to keep a copy of this image. Also note that you
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267 | must not call this function if the movie is <a href="#finished">finished</a>(), since by
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268 | then the image will not be available.
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269 | <p> <p>See also <a href="#framePixmap">framePixmap</a>().
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270 |
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271 | <h3 class=fn>int <a name="frameNumber"></a>QMovie::frameNumber () const
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272 | </h3>
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273 | Returns the number of times EndOfFrame has been emitted since the
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274 | start of the current loop of the movie. Thus, before any
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275 | EndOfFrame has been emitted the value will be 0; within slots
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276 | processing the first signal, <a href="#frameNumber">frameNumber</a>() will be 1, and so on.
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277 |
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278 | <h3 class=fn>const <a href="qpixmap.html">QPixmap</a> & <a name="framePixmap"></a>QMovie::framePixmap () const
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279 | </h3>
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280 | Returns the current frame of the movie, as a <a href="qpixmap.html">QPixmap</a>. It is not
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281 | generally useful to keep a copy of this pixmap. It is better to
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282 | keep a copy of the QMovie and get the <a href="#framePixmap">framePixmap</a>() only when
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283 | needed for drawing.
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284 | <p> <p>See also <a href="#frameImage">frameImage</a>().
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285 |
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286 | <p>Example: <a href="movies-example.html#x502">movies/main.cpp</a>.
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287 | <h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="getValidRect"></a>QMovie::getValidRect () const
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288 | </h3>
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289 | Returns the area of the pixmap for which pixels have been
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290 | generated.
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291 |
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292 | <h3 class=fn>bool <a name="isNull"></a>QMovie::isNull () const
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293 | </h3>
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294 | Returns TRUE if the movie is null; otherwise returns FALSE.
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295 |
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296 | <h3 class=fn><a href="qmovie.html">QMovie</a> & <a name="operator-eq"></a>QMovie::operator= ( const <a href="qmovie.html">QMovie</a> & movie )
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297 | </h3>
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298 | Makes this movie use the same data as movie <em>movie</em>. QMovies use
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299 | <a href="shclass.html#explicit-sharing">explicit sharing</a>.
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300 |
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301 | <h3 class=fn>void <a name="pause"></a>QMovie::pause ()
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302 | </h3>
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303 | Pauses the progress of the animation.
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304 | <p> <p>See also <a href="#unpause">unpause</a>().
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305 |
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306 | <p>Example: <a href="movies-example.html#x503">movies/main.cpp</a>.
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307 | <h3 class=fn>bool <a name="paused"></a>QMovie::paused () const
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308 | </h3>
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309 | Returns TRUE if the image is paused; otherwise returns FALSE.
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310 |
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311 | <p>Example: <a href="movies-example.html#x504">movies/main.cpp</a>.
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312 | <h3 class=fn>void <a name="pushData"></a>QMovie::pushData ( const uchar * data, int length )
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313 | </h3>
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314 | Pushes <em>length</em> bytes from <em>data</em> into the movie. <em>length</em> must
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315 | be no more than the amount returned by <a href="#pushSpace">pushSpace</a>() since the
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316 | previous call to <a href="#pushData">pushData</a>().
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317 |
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318 | <h3 class=fn>int <a name="pushSpace"></a>QMovie::pushSpace () const
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319 | </h3>
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320 | Returns the maximum amount of data that can currently be pushed
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321 | into the movie by a call to <a href="#pushData">pushData</a>(). This is affected by the
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322 | initial buffer size, but varies as the movie plays and data is
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323 | consumed.
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324 |
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325 | <h3 class=fn>void <a name="restart"></a>QMovie::restart ()
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326 | </h3>
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327 | Rewinds the movie to the beginning. If the movie has not been
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328 | paused, it begins playing again.
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329 |
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330 | <p>Example: <a href="movies-example.html#x505">movies/main.cpp</a>.
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331 | <h3 class=fn>bool <a name="running"></a>QMovie::running () const
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332 | </h3>
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333 | Returns TRUE if the image is not single-stepping, not paused, and
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334 | not finished; otherwise returns FALSE.
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335 |
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336 | <h3 class=fn>void <a name="setBackgroundColor"></a>QMovie::setBackgroundColor ( const <a href="qcolor.html">QColor</a> & c )
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337 | </h3>
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338 | Sets the background color of the pixmap to <em>c</em>. If the background
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339 | color isValid(), the pixmap will never have a mask because the
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340 | background color will be used in transparent regions of the image.
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341 | <p> <p>See also <a href="#backgroundColor">backgroundColor</a>().
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342 |
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343 | <h3 class=fn>void <a name="setSpeed"></a>QMovie::setSpeed ( int percent )
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344 | </h3>
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345 | Sets the movie's play speed as a percentage, to <em>percent</em>. This
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346 | is a percentage of the speed dictated by the input data format.
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347 | The default is 100 percent.
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348 |
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349 | <h3 class=fn>int <a name="speed"></a>QMovie::speed () const
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350 | </h3>
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351 | Returns the movie's play speed as a percentage. The default is 100
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352 | percent.
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353 | <p> <p>See also <a href="#setSpeed">setSpeed</a>().
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354 |
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355 | <h3 class=fn>void <a name="step"></a>QMovie::step ()
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356 | </h3>
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357 | Steps forward 1 frame and then pauses.
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358 |
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359 | <p>Example: <a href="movies-example.html#x506">movies/main.cpp</a>.
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360 | <h3 class=fn>void <a name="step-2"></a>QMovie::step ( int steps )
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361 | </h3>
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362 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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363 | <p> Steps forward, showing <em>steps</em> frames, and then pauses.
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364 |
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365 | <h3 class=fn>int <a name="steps"></a>QMovie::steps () const
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366 | </h3>
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367 | Returns the number of steps remaining after a call to <a href="#step">step</a>(). If
|
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368 | the movie is paused, <a href="#steps">steps</a>() returns 0. If it's running normally
|
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369 | or is finished, steps() returns a negative number.
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370 |
|
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371 | <p>Example: <a href="movies-example.html#x507">movies/main.cpp</a>.
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372 | <h3 class=fn>void <a name="unpause"></a>QMovie::unpause ()
|
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373 | </h3>
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374 | Unpauses the progress of the animation.
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375 | <p> <p>See also <a href="#pause">pause</a>().
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376 |
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377 | <p>Example: <a href="movies-example.html#x508">movies/main.cpp</a>.
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378 | <!-- eof -->
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379 | <hr><p>
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380 | This file is part of the <a href="index.html">Qt toolkit</a>.
|
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381 | Copyright © 1995-2007
|
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382 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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383 | <table width=100% cellspacing=0 border=0><tr>
|
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384 | <td>Copyright © 2007
|
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385 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
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386 | <td align=right><div align=right>Qt 3.3.8</div>
|
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387 | </table></div></address></body>
|
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388 | </html>
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