Add enabled property to the QML Connections element

Now allows a quick way to enable/disable the signal handlers in the
QML Connections element. Updated test file to have objectName and added
test for this new functionality. Set to be available as of QtQml2.3.

[ChangeLog][QML Elements] Allow enabling/disabling of connections established using a Connections element

Change-Id: Ib0de2b3c78bb529ef74d5b4bb4ccb0f335cc50de
Task-number: QTBUG-36350
Reviewed-by: Michael Brasser <michael.brasser@live.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/src/qml/qml/qqmlboundsignal.cpp b/src/qml/qml/qqmlboundsignal.cpp
index 3d1a9f8a88..f88e844529 100644
--- a/src/qml/qml/qqmlboundsignal.cpp
+++ b/src/qml/qml/qqmlboundsignal.cpp
@@ -250,7 +250,7 @@ QQmlBoundSignal::QQmlBoundSignal(QObject *target, int signal, QObject *owner,
                                  QQmlEngine *engine)
     : QQmlNotifierEndpoint(QQmlNotifierEndpoint::QQmlBoundSignal),
       m_prevSignal(0), m_nextSignal(0),
-      m_expression(0)
+      m_enabled(true), m_expression(0)
 {
     addToObject(owner);
 
@@ -313,11 +313,26 @@ void QQmlBoundSignal::takeExpression(QQmlBoundSignalExpression *e)
         m_expression->setNotifyOnValueChanged(false);
 }
 
+/*!
+    This property holds whether the item will emit signals.
+
+    The QQmlBoundSignal callback will only emit a signal if this property is set to true.
+
+    By default, this property is true.
+ */
+void QQmlBoundSignal::setEnabled(bool enabled)
+{
+    if (m_enabled == enabled)
+        return;
+
+    m_enabled = enabled;
+}
+
 void QQmlBoundSignal_callback(QQmlNotifierEndpoint *e, void **a)
 {
     QQmlBoundSignal *s = static_cast<QQmlBoundSignal*>(e);
 
-    if (!s->m_expression)
+    if (!s->m_expression || !s->m_enabled)
         return;
 
     QV4DebugService *service = QQmlDebugConnector::service<QV4DebugService>();