Improve value type binding behavior

Changing value type bindings in state changes, and implicitly removing
them on property assignment was not reliable.  Internally the system
considered a binding on "font" and one on "font.x" as a binding on two
separate properties, even though the "font" binding completely
overrides the "font.x" property.

Following this change a binding to "font.x" creates a proxy binding object
on the "font" property in addition to the "font.x" binding itself.  This
allows behavior to be consistent across all operations.

QT-2920

1 files changed, 2 insertions, 1 deletions

diff --git a/src/declarative/qml/qdeclarativeobjectscriptclass.cpp b/src/declarative/qml/qdeclarativeobjectscriptclass.cpp
index dc4a676..68780b6 100644
--- a/src/declarative/qml/qdeclarativeobjectscriptclass.cpp
+++ b/src/declarative/qml/qdeclarativeobjectscriptclass.cpp
@@ -351,7 +351,8 @@ void QDeclarativeObjectScriptClass::setProperty(QObject *obj,
         }
     }
 
-    QDeclarativeAbstractBinding *delBinding = QDeclarativePropertyPrivate::setBinding(obj, *lastData, 0);
+    QDeclarativeAbstractBinding *delBinding = 
+        QDeclarativePropertyPrivate::setBinding(obj, lastData->coreIndex, -1, 0);
     if (delBinding)
         delBinding->destroy();