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<h1>/home/niklas/workspace/fbgui/src/downloadmanager.h</h1> </div>
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<a href="downloadmanager_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2010,2011 - RZ Uni Freiburg</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 2010,2011 - OpenSLX Project</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * This program/file is free software distributed under the GPL version 2.</span>
<a name="l00006"></a>00006 <span class="comment"> * See http://openslx.org/COPYING</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * If you have any feedback please consult http://openslx.org/feedback and</span>
<a name="l00009"></a>00009 <span class="comment"> * send your feedback to feedback@openslx.org</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * General information about OpenSLX can be found under http://openslx.org</span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * Class managing download requests:</span>
<a name="l00015"></a>00015 <span class="comment"> * - provides queueing functionality</span>
<a name="l00016"></a>00016 <span class="comment"> * - static info: filename, filesize</span>
<a name="l00017"></a>00017 <span class="comment"> * - dynamic info: download progress, current speed</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef DOWNLOADMANAGER_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define DOWNLOADMANAGER_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="fbgui_8h.html">fbgui.h</a>"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keyword">extern</span> <span class="keywordtype">bool</span> <a class="code" href="downloadmanager_8h.html#a398527b3e9e358c345c5047b16871957">debug</a>;
<a name="l00027"></a>00027 <span class="keyword">extern</span> QUrl <a class="code" href="downloadmanager_8h.html#a234e8a60f8c04f267847d0f548e48cb9">baseURL</a>;
<a name="l00028"></a>00028 <span class="keyword">extern</span> QString <a class="code" href="downloadmanager_8h.html#a77498c74d71edea0b1fddec0565ca859">binPath</a>;
<a name="l00029"></a>00029 <span class="keyword">extern</span> QString <a class="code" href="downloadmanager_8h.html#aa99ae0a965d4bde3989d259fadc4f0ec">downloadPath</a>;
<a name="l00030"></a>00030 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="downloadmanager_8h.html#afb7bae46ad8e23553477b181275e66fa">updateInterval</a>;
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="class_download_manager.html">00032</a> <span class="keyword">class </span><a class="code" href="class_download_manager.html">DownloadManager</a>: <span class="keyword">public</span> QObject {
<a name="l00033"></a>00033 Q_OBJECT
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00036"></a>00036 <a class="code" href="class_download_manager.html#af9b8808c39d0e30a402666d4e578e70e">DownloadManager</a>();
<a name="l00037"></a>00037 <a class="code" href="class_download_manager.html#abb67275a951d706a3108a0d307ea9113">~DownloadManager</a>();
<a name="l00038"></a><a class="code" href="class_download_manager.html#a6c8af4bf075bcc5372860dbbd73bc131">00038</a> QTime <a class="code" href="class_download_manager.html#a6c8af4bf075bcc5372860dbbd73bc131">time</a>;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">private</span>:
<a name="l00041"></a>00041 <span class="comment">// checks for valid download directory, ran once in constructor</span>
<a name="l00042"></a>00042 <span class="keywordtype">void</span> checkDownloadDirectory();
<a name="l00043"></a>00043 <span class="comment">// private control function for queueing mechanism.</span>
<a name="l00044"></a>00044 <span class="keywordtype">void</span> processDownloadRequest(<span class="keyword">const</span> QUrl& url);
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">// base objects for downloading</span>
<a name="l00047"></a>00047 QNetworkAccessManager* _qnam;
<a name="l00048"></a>00048 QQueue<QUrl> _downloadQueue;
<a name="l00049"></a>00049 QNetworkReply* _currentDownload;
<a name="l00050"></a>00050 QFile _outfile;
<a name="l00051"></a>00051 QDir _downloadDir;
<a name="l00052"></a>00052 <span class="comment">// download progress variables</span>
<a name="l00053"></a>00053 <span class="keywordtype">int</span> _currentProgress, _lastProgress;
<a name="l00054"></a>00054 <span class="comment">// download in progress flag</span>
<a name="l00055"></a>00055 <span class="keywordtype">bool</span> _dip;
<a name="l00056"></a>00056 <span class="comment">// static counter</span>
<a name="l00057"></a>00057 <span class="keyword">static</span> <span class="keywordtype">int</span> _downloaded;
<a name="l00058"></a>00058
<a name="l00059"></a>00059 signals:
<a name="l00060"></a>00060 <span class="comment">// notify sends a message to the javascript interface to be evaluated there</span>
<a name="l00061"></a>00061 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#a4c410f1ac445d93b4251c70a92f3fd7e">notify</a>(<span class="keyword">const</span> QString& msg);
<a name="l00062"></a>00062 <span class="comment">// downloadInfo sends static information (name, size) to the interface.</span>
<a name="l00063"></a>00063 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#adc2f6c143c220743395b8e618544bfbb">downloadInfo</a>(<span class="keyword">const</span> QString& filename, <span class="keyword">const</span> <span class="keywordtype">double</span>& filesize);
<a name="l00064"></a>00064 <span class="comment">// updateProgress sends download progress information to the interface.</span>
<a name="l00065"></a>00065 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#aacb3a486aac7b6027acebae08912f5e9">updateProgress</a>(<span class="keyword">const</span> <span class="keywordtype">int</span>& percent, <span class="keyword">const</span> <span class="keywordtype">double</span>& speed, <span class="keyword">const</span> QString& unit);
<a name="l00066"></a>00066 <span class="comment">// signal emitted when download queue is empty.</span>
<a name="l00067"></a>00067 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#aae1d90600db32b6d877546d89a140657">downloadQueueEmpty</a>();
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keyword">public</span> slots:
<a name="l00070"></a>00070 <span class="comment">// public slots to receive download requests.</span>
<a name="l00071"></a>00071 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#a22a6840285339eccfcee5aea23fa5bde">downloadFile</a>(<span class="keyword">const</span> QUrl& fileUrl);
<a name="l00072"></a>00072 <span class="comment">// convenience function</span>
<a name="l00073"></a>00073 <span class="keywordtype">void</span> <a class="code" href="class_download_manager.html#a22a6840285339eccfcee5aea23fa5bde">downloadFile</a>(<span class="keyword">const</span> QString& fileUrl);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keyword">private</span> slots:
<a name="l00076"></a>00076 <span class="comment">// private slots to manage the downloading process</span>
<a name="l00077"></a>00077 <span class="keywordtype">void</span> startNextDownload();
<a name="l00078"></a>00078 <span class="keywordtype">void</span> processMetaInfo();
<a name="l00079"></a>00079 <span class="keywordtype">void</span> downloadReady();
<a name="l00080"></a>00080 <span class="keywordtype">void</span> downloadProgress(qint64 bytesIn, qint64 bytesTotal);
<a name="l00081"></a>00081 <span class="keywordtype">void</span> downloadFinished();
<a name="l00082"></a>00082 };
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="preprocessor">#endif // DOWNLOADMANAGER_H</span>
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