Add Component.onDestruction attached property

This property complements Component.onCompleted.  It is emitted before
the destruction actually begins (for the most part) so the objects are
still alive and accessible.

The QtObject.onDestroyed signal is now blocked as it never really worked
properly anyway.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/declarative/qml/qdeclarativeengine.cpp b/src/declarative/qml/qdeclarativeengine.cpp
index a478bf5..1deadb2 100644
--- a/src/declarative/qml/qdeclarativeengine.cpp
+++ b/src/declarative/qml/qdeclarativeengine.cpp
@@ -155,7 +155,7 @@ QDeclarativeEnginePrivate::QDeclarativeEnginePrivate(QDeclarativeEngine *e)
 : captureProperties(false), rootContext(0), currentExpression(0), isDebugging(false), 
   contextClass(0), sharedContext(0), sharedScope(0), objectClass(0), valueTypeClass(0), 
   globalClass(0), cleanup(0), erroredBindings(0), inProgressCreations(0), 
-  scriptEngine(this), workerScriptEngine(0), componentAttacheds(0), inBeginCreate(false), 
+  scriptEngine(this), workerScriptEngine(0), componentAttached(0), inBeginCreate(false), 
   networkAccessManager(0), networkAccessManagerFactory(0),
   typeManager(e), uniqueId(1)
 {
@@ -350,8 +350,13 @@ typedef QMap<QString, QString> StringStringMap;
 Q_GLOBAL_STATIC(StringStringMap, qmlEnginePluginsWithRegisteredTypes); // stores the uri
 
 
-void QDeclarativePrivate::qdeclarativeelement_destructor(QObject *)
+void QDeclarativePrivate::qdeclarativeelement_destructor(QObject *o)
 {
+    QObjectPrivate *p = QObjectPrivate::get(o);
+    Q_ASSERT(p->declarativeData);
+    QDeclarativeData *d = static_cast<QDeclarativeData*>(p->declarativeData);
+    if (d->ownContext) 
+        d->context->destroy();
 }
 
 void QDeclarativeData::destroyed(QAbstractDeclarativeData *d, QObject *o)
@@ -855,7 +860,7 @@ void QDeclarativeData::destroyed(QObject *object)
     if (propertyCache)
         propertyCache->release();
 
-    if (ownContext)
+    if (ownContext && context)
         context->destroy();
 
     QDeclarativeGuard<QObject> *guard = guards;