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, 13 insertions, 2 deletions

diff --git a/src/declarative/qml/qdeclarativecomponent_p.h b/src/declarative/qml/qdeclarativecomponent_p.h
index dfd0fc3..24e5386 100644
--- a/src/declarative/qml/qdeclarativecomponent_p.h
+++ b/src/declarative/qml/qdeclarativecomponent_p.h
@@ -99,10 +99,10 @@ public:
     QDeclarativeCompiledData *cc;
 
     struct ConstructionState {
-        ConstructionState() : componentAttacheds(0), completePending(false) {}
+        ConstructionState() : componentAttached(0), completePending(false) {}
         QList<QDeclarativeEnginePrivate::SimpleList<QDeclarativeAbstractBinding> > bindValues;
         QList<QDeclarativeEnginePrivate::SimpleList<QDeclarativeParserStatus> > parserStatus;
-        QDeclarativeComponentAttached *componentAttacheds;
+        QDeclarativeComponentAttached *componentAttached;
         QList<QDeclarativeError> errors;
         bool completePending;
     };
@@ -132,13 +132,24 @@ public:
     QDeclarativeComponentAttached(QObject *parent = 0);
     ~QDeclarativeComponentAttached();
 
+    void add(QDeclarativeComponentAttached **a) {
+        prev = a; next = *a; *a = this;
+        if (next) next->prev = &next;
+    }
+    void rem() {
+        if (next) next->prev = prev;
+        *prev = next;
+        next = 0; prev = 0;
+    }
     QDeclarativeComponentAttached **prev;
     QDeclarativeComponentAttached *next;
 
 Q_SIGNALS:
     void completed();
+    void destruction();
 
 private:
+    friend class QDeclarativeContextData;;
     friend class QDeclarativeComponentPrivate;
 };