also support listing info (this one won't be backported because it is a BC addition)

svn path=/trunk/KDE/kdelibs/; revision=911625

dataenginemanager.cpp

@@ -188,6 +188,20 @@ QStringList DataEngineManager::listAllEngines(const QString &parentApp)
     return engines;
 }
 
+KPluginInfo::List DataEngineManager::listEngineInfo(const QString &parentApp)
+{
+    QString constraint;
+
+    if (parentApp.isEmpty()) {
+        constraint.append("not exist [X-KDE-ParentApp]");
+    } else {
+        constraint.append("[X-KDE-ParentApp] == '").append(parentApp).append("'");
+    }
+
+    KService::List offers = KServiceTypeTrader::self()->query("Plasma/DataEngine", constraint);
+    return KPluginInfo::fromServices(offers);
+}
+
 } // namespace Plasma
 
 #include "dataenginemanager.moc"

dataenginemanager.h

@@ -21,6 +21,9 @@
 #define PLASMA_DATAENGINEMANAGER_H
 
 #include <QtCore/QHash>
+
+#include <kplugininfo.h>
+
 #include <plasma/dataengine.h>
 
 namespace Plasma
@@ -72,7 +75,7 @@ class PLASMA_EXPORT DataEngineManager: public QObject
         void unloadEngine(const QString &name);
 
         /**
-         * @return a listing of all known engines by name
+         * @return a listing of all known DataEngines by name
          *
          * @param parentApp the application to filter applets on. Uses the
          *                  X-KDE-ParentApp entry (if any) in the plugin info.
@@ -82,6 +85,18 @@ class PLASMA_EXPORT DataEngineManager: public QObject
          */
         static QStringList listAllEngines(const QString &parentApp = QString());
 
+        /**
+         * Returns a list of all known DataEngines.
+         *
+         * @param parentApp the application to filter applets on. Uses the
+         *                  X-KDE-ParentApp entry (if any) in the plugin info.
+         *                  The default value of QString() will result in a
+         *                  list containing only applets not specifically
+         *                  registered to an application.
+         * @return list of DataEngines
+         **/
+        static KPluginInfo::List listEngineInfo(const QString &parentApp = QString());
+
     private:
         /**
          * Default constructor. The singleton method self() is the