add apidocs for the shellpluginloader

src/plasmaview/shellpluginloader.h

@@ -23,6 +23,28 @@
 #include <Plasma/PluginLoader>
 #include <plasmaview/plasmaview_export.h>
 
+/**
+ * @class ShellPluginLoader plasmaview/shellpluginloader.h <PlasmaView/ShellPluginLoader>
+ *
+ * This class loads the shell package. Normally you won't need this class, unless if you
+ * want to use the PlasmaView::View and Plasma::Corona directly.
+ *
+ * This class must be instantiated before the Corona and the View
+ * example:
+ *
+ * <code>
+ *     // example 1, it works
+ *      Plasma::PluginLoader::setPluginLoader(new ShellPluginLoader);
+ *      Plasma::Corona *corona = new Plasma::Corona();
+ *      View *view = new View(corona);
+ *
+ *      // exmaple 2, it doesn't work
+ *      Plasma::corona *corona = new plasma::corona();
+ *      View *view = new view(corona);
+ *      Plasma::PluginLoader::setPluginLoader(new shellpluginloader);
+ * </code>
+ */
+
 class ShellPluginLoaderPrivate;
 
 class PLASMAVIEW_EXPORT ShellPluginLoader : public Plasma::PluginLoader