experiment with AppletInterface to be attached

Plasmoid.title etc would be attached properties to the root object instead of being a component itself

examples/applets/widgetgallery/contents/ui/main.qml

@@ -19,14 +19,18 @@
 
 import QtQuick 2.0
 import org.kde.plasma.components 2.0
+import org.kde.shell 2.0
 
 Item {
     property int minimumWidth: 300
     property int minimumHeight: 400
 
+    AppletInterface.title: "bah"
+
     ToolBar {
         id: toolBar
         z: 10
+        //AppletInterface.title: "bah"
         anchors {
             top: parent.top
             left: parent.left

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -52,6 +52,8 @@
 
 Q_DECLARE_METATYPE(AppletInterface*)
 
+QHash<QObject *, AppletInterface *> AppletInterface::s_rootObjects = QHash<QObject *, AppletInterface *>();
+
 AppletInterface::AppletInterface(DeclarativeAppletScript *script, QQuickItem *parent)
     : QQuickItem(parent),
       m_appletScriptEngine(script),
@@ -96,6 +98,7 @@ AppletInterface::AppletInterface(DeclarativeAppletScript *script, QQuickItem *pa
 
 AppletInterface::~AppletInterface()
 {
+    s_rootObjects.remove(m_qmlObject->engine());
 }
 
 void AppletInterface::init()
@@ -109,6 +112,8 @@ void AppletInterface::init()
     //use our own custom network access manager that will access Plasma packages and to manage security (i.e. deny access to remote stuff when the proper extension isn't enabled
     QQmlEngine *engine = m_qmlObject->engine();
 
+    s_rootObjects[m_qmlObject->engine()] = this;
+
     //Hook generic url resolution to the applet package as well
     //TODO: same thing will have to be done for every qqmlengine: PackageUrlInterceptor is material for plasmaquick?
     PackageUrlInterceptor *interceptor = new PackageUrlInterceptor(engine, m_appletScriptEngine->package());

src/scriptengines/qml/plasmoid/appletinterface.h

@@ -237,7 +237,15 @@ public:
      * DEPRECATED: use plasmoid.configuration instead
      */
     Q_INVOKABLE void writeConfig(const QString &entry, const QVariant &value);
-    
+
+    static AppletInterface *qmlAttachedProperties(QObject *object)
+    {
+        if (!object->parent() && s_rootObjects.contains(QtQml::qmlEngine(object))) {
+            return s_rootObjects.value(QtQml::qmlEngine(object));
+        } else {
+            return 0;
+        }
+    }
 
 //PROPERTY ACCESSORS-------------------------------------------------------------------
     QString icon() const;
@@ -361,6 +369,10 @@ private:
     bool m_expanded : 1;
     bool m_hideOnDeactivate : 1;
     friend class ContainmentInterface;
+
+    static QHash<QObject *, AppletInterface *> s_rootObjects;
 };
 
+QML_DECLARE_TYPEINFO(AppletInterface, QML_HAS_ATTACHED_PROPERTIES)
+
 #endif

src/scriptengines/qml/plasmoid/declarativeappletscript.cpp

@@ -54,7 +54,9 @@ DeclarativeAppletScript::DeclarativeAppletScript(QObject *parent, const QVariant
     : Plasma::AppletScript(parent),
       m_interface(0)
 {
-    qmlRegisterType<AppletInterface>();
+    //qmlRegisterType<AppletInterface>();
+    qmlRegisterUncreatableType<AppletInterface>("org.kde.shell", 2, 0, "AppletInterface",
+                                             QLatin1String("Do not create objects of type AppletInterface"));
     qmlRegisterType<KDeclarative::ConfigPropertyMap>();
     Q_UNUSED(args);
 }