Don't use a virtual signal - moc complains.

4 files changed, 16 insertions, 4 deletions

diff --git a/src/declarative/qml/qmlbinding.cpp b/src/declarative/qml/qmlbinding.cpp
index d1a8fe8..4ec7191 100644
--- a/src/declarative/qml/qmlbinding.cpp
+++ b/src/declarative/qml/qmlbinding.cpp
@@ -225,9 +225,10 @@ void QmlBinding::update(QmlMetaProperty::WriteFlags flags)
     data->release();
 }
 
-void QmlBinding::valueChanged()
+void QmlBinding::emitValueChanged()
 {
     update();
+    // don't bother calling valueChanged()
 }
 
 void QmlBinding::setEnabled(bool e, QmlMetaProperty::WriteFlags flags)
diff --git a/src/declarative/qml/qmlbinding.h b/src/declarative/qml/qmlbinding.h
index 242742a..cefb4fe 100644
--- a/src/declarative/qml/qmlbinding.h
+++ b/src/declarative/qml/qmlbinding.h
@@ -114,7 +114,7 @@ public Q_SLOTS:
     void update() { update(QmlMetaProperty::DontRemoveBinding); }
 
 protected:
-    virtual void valueChanged();
+    void emitValueChanged();
 
 private:
     Q_DECLARE_PRIVATE(QmlBinding)
diff --git a/src/declarative/qml/qmlexpression.cpp b/src/declarative/qml/qmlexpression.cpp
index 1587d61..22a9c36f 100644
--- a/src/declarative/qml/qmlexpression.cpp
+++ b/src/declarative/qml/qmlexpression.cpp
@@ -627,7 +627,7 @@ QmlError QmlExpression::error() const
 /*! \internal */
 void QmlExpression::__q_notify()
 {
-    valueChanged();
+    emitValueChanged();
 }
 
 void QmlExpressionPrivate::clearGuards()
@@ -753,6 +753,15 @@ void QmlExpressionPrivate::updateGuards(const QPODVector<QmlEnginePrivate::Captu
     calling QmlExpression::value()) before this signal will be emitted.
 */
 
+/*!
+    Subclasses can capture the emission of the valueChanged() signal by overriding
+    this function. They can choose whether to then call valueChanged().
+*/
+void QmlExpression::emitValueChanged()
+{
+    emit valueChanged();
+}
+
 QmlAbstractExpression::QmlAbstractExpression()
 : m_context(0), m_prevExpression(0), m_nextExpression(0)
 {
diff --git a/src/declarative/qml/qmlexpression.h b/src/declarative/qml/qmlexpression.h
index c019f21..cc02d56 100644
--- a/src/declarative/qml/qmlexpression.h
+++ b/src/declarative/qml/qmlexpression.h
@@ -92,9 +92,11 @@ public Q_SLOTS:
     QVariant value(bool *isUndefined = 0);
 
 Q_SIGNALS:
-    virtual void valueChanged();
+    void valueChanged();
 
 protected:
+    virtual void emitValueChanged();
+
     QmlExpression(QmlContext *, const QString &, QObject *, 
                   QmlExpressionPrivate &dd);
     QmlExpression(QmlContext *, void *, QmlRefCount *rc, QObject *me, const QString &,