Revert "Revert "Add QObject::objectNameChanged(con... signal""

This reverts commit 9b17557f3bbd5135651bcedf9f10e61d7e078ae2.

Justification: Temporary commit, see JIRA task.
Task-number: QTBUG-22985
Change-Id: I3df9eb5fdbdc133349dca5e192dcfcc9e758626c
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>

2 files changed, 14 insertions, 6 deletions

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index febe90943b..4e8d2fc265 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -949,13 +949,20 @@ QString QObject::objectName() const
 void QObject::setObjectName(const QString &name)
 {
     Q_D(QObject);
-    bool objectNameChanged = d->declarativeData && d->objectName != name;
+    if (d->objectName != name) {
+        d->objectName = name;
+        if (d->declarativeData)
+            d->declarativeData->objectNameChanged(d->declarativeData, this);
+        emit objectNameChanged(d->objectName);
+    }
+}
 
-    d->objectName = name;
+/*! \fn void QObject::objectNameChanged(const QString &objectName)
 
-    if (objectNameChanged) 
-        d->declarativeData->objectNameChanged(d->declarativeData, this);
-}
+    This signal is emitted after the object's name has been changed. The new object name is passed as \a objectName.
+
+    \sa QObject::objectName
+*/
 
 /*!
     \fn bool QObject::isWidgetType() const
diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index 22572c072e..1f7c706741 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -113,7 +113,7 @@ public:
 class Q_CORE_EXPORT QObject
 {
     Q_OBJECT
-    Q_PROPERTY(QString objectName READ objectName WRITE setObjectName)
+    Q_PROPERTY(QString objectName READ objectName WRITE setObjectName NOTIFY objectNameChanged)
     Q_DECLARE_PRIVATE(QObject)
 
 public:
@@ -322,6 +322,7 @@ public:
 
 Q_SIGNALS:
     void destroyed(QObject * = 0);
+    void objectNameChanged(const QString &objectName);
 
 public:
     inline QObject *parent() const { return d_ptr->parent; }