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   7                     mobile multilingual dictionary for maemo.org platform
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  10                     n800 n810 dictionary xdxf stardict mobile linux comarch" />
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  27                 mDictionary - multilingual dictionary for Maemo
  28         </title>
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  35                 INSTALL:
  36                 <a href="files/mdictionary.install"
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  38                    title="Click to install mDictionary on OS2006"><span>OS2006</span>
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  46                    title="Click to install mDictionary on OS2008"><span style="letter-spacing:0px;">OS2008</span>
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  48                 <span style="clear:both;text-align:center;display:block;font-size:9px;"><a href="howto.html" style="font-size:9px;text-decoration:none;">(read How To... first)</a></span>
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  52                                 mDictionary
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  54                         <p class="description">
  55                                 multilingual dictionary for <a href="http://www.maemo.org" target="_blank"><img align="top" border="0" src="images/maemo_logo.png" ></a>(N770, N800 &amp; N810)
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  58                                 &nbsp; and <a href="http://www.meego.com" target="_blank"><img align="top" border="0" src="images/Meego.png" width="80" height="20" ></a> (N900 & netbook )
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  74                 <h1>Developer's HOWTO:<br />making Your own GUI for mDictionary</h1>
  75
  76 <p><b>mDictionary</b> is intended to be as modifiable as possible. So apart from developing Your own dictionary engines, You can also create alternative user interface, should You find ours inattractive. For the intrepid ones, I have described how to do that. In this howto, I am going to explain how to communicate GUI with the engines's manager</p>
  77
  78 <p>The only header file You need to include in Your GUI is <span class="code">ws_dbus.h</span>. It contains all the functions necessary to communicate with the engines manager. The header file is available from our svn repository at <a href="https://garage.maemo.org">https://garage.maemo.org</a>.</p>
  79 <p>Firstly, You initialize our dbus wrapper library with <span class="code">ws_dbus_create</span> function. You have to specify the name and the version of Your app and store the function's return value as it is necessary for further dbus wrapper communication.</p>
  80
  81 <div class="code">dbus_data = ws_dbus_create ("mDictionaryGui", "v1.0");</div>
  82 <p>
  83 Then You configure the remote and local addresses, by using <span class="code">ws_dbus_config</span>. The settings should be the same as in the example, below:
  84
  85 </p>
  86 <div class="code">ws_dbus_config( dbus_data,
  87                 WS_DBUS_CONFIG_SERVICE,
  88                 "org.maemo.mDictionaryGui" );
  89 ws_dbus_config( dbus_data,
  90                 WS_DBUS_CONFIG_OBJECT,
  91                 "/org/maemo/mDictionaryGui" );
  92 ws_dbus_config( dbus_data,
  93                 WS_DBUS_CONFIG_IFACE,
  94                 "org.maemo.mDictionaryGui" );
  95 ws_dbus_config( dbus_data,
  96                 WS_DBUS_CONFIG_REMOTE_SERVICE,
  97                 "org.maemo.mDictionaryManager" );
  98 ws_dbus_config( dbus_data,
  99                 WS_DBUS_CONFIG_REMOTE_OBJECT,
 100                 "/org/maemo/mDictionaryManager" );
 101 ws_dbus_config( dbus_data,
 102                 WS_DBUS_CONFIG_REMOTE_IFACE,
 103                 "org.maemo.mDictionaryManager" );</div>
 104 <p>
 105 Now You have to call the <span class="code">ws_dbus_connect</span> function. It's an opaque function, which allows local methods to be run remotely.
 106 </p>
 107 <div class="code">ws_dbus_connect( dbus_data );</div>
 108 <p>
 109 The only thing that's left now is specifying callback functions (with <span class="code">ws_dbus_set_cb</span>), which are to be called
 110 whenever the manager calls a remote method.
 111 </p>
 112 <div class="code">ws_dbus_set_cb( dbus_data,
 113                 "return_words",
 114                 ws_gui_dbus_return_words,
 115                 ws_gui_app );</div>
 116
 117 <p>Callbacks definition:</p>
 118
 119 <div class="code">void ws_gui_dbus_return_words( GError *error,
 120                                GArray *words,
 121                                gpointer user_data );</div>
 122
 123 <p class="faq_question">
 124 Accessing received data inside a callback handling function:
 125 </p>
 126
 127 <p>
 128 In this case, words is a <span class="code">GArray</span> of <span class="code">osso_rpc_t</span> values. To access the contents of an <span class="code">osso_rpc_t</span> variable, You first have to check its type by accessing the type field. The value field is an union of primitives. Depending on the type, You should read the value by accessing a proper field. Here is an example:
 129 </p>
 130
 131 <div class="code">int i;
 132 osso_rpc_t data;
 133 for (i = 0; i < words->len; ++i)
 134 {
 135         data = g_array_index (words, osso_rpc_t, 0);
 136         if (DBUS_TYPE_STRING == data.type)
 137         {
 138                 char *tmp_word = g_strdup(data.value.s);
 139                 do_sth_with_word(tmp_word);
 140         };
 141 };
 142 </div>
 143 <p class="faq_question">
 144         Calling remote methods on manager:
 145 </p>
 146 <div class="code">ws_dbus_client_find_word (ws_gui_app->dbus_data, word);</div>
 147 <p>
 148 All functions containing the word client in their name, should be called from the GUI application.
 149
 150 Please refer to dbus wrapper API documentation for further info. It can be generated by issuing <span class="code">make docs</span> command in dbus wrapper source directory.
 151 </p>
 152
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