a singleton

will be used to assign engines for items

declarativeimports/plasmacomponents/plasmacomponentsplugin.cpp

@@ -31,6 +31,29 @@
 #include "qmenuitem.h"
 #include "kdialogproxy.h"
 
+class BKSingleton
+{
+public:
+   EngineBookKeeping self;
+};
+K_GLOBAL_STATIC(BKSingleton, privateBKSelf)
+
+EngineBookKeeping::EngineBookKeeping()
+{
+}
+
+EngineBookKeeping *EngineBookKeeping::self()
+{
+    return &privateBKSelf->self;
+}
+
+QDeclarativeEngine *engineFor(QDeclarativeItem *item) const
+{
+    return 0;
+}
+
+
+
 void PlasmaComponentsPlugin::registerTypes(const char *uri)
 {
     Q_ASSERT(uri == QLatin1String("org.kde.plasma.components"));

declarativeimports/plasmacomponents/plasmacomponentsplugin.h

@@ -21,6 +21,23 @@
 #define PLASMACOMPONENTSPLUGIN_H
 
 #include <QDeclarativeExtensionPlugin>
+#include <QHash>
+
+class QDeclarativeEngine;
+class QDeclarativeItem;
+class PlasmaComponentsPlugin;
+
+class EngineBookKeeping
+{
+public:
+    EngineBookKeeping();
+    static EngineBookKeeping *self();
+
+    QDeclarativeEngine *engineFor(QDeclarativeItem *item) const;
+
+private:
+    QHash <PlasmaComponentsPlugin*, QDeclarativeEngine*> m_engines;
+};
 
 class PlasmaComponentsPlugin : public QDeclarativeExtensionPlugin
 {