QmlProfiler: Allow preselection of events to be recorded

This allows us to reduce the amount of data we need to handle
if the user isn't interested in certain categories.

Task-number: QTBUG-41118
Change-Id: Ieaac12fb1dec29d6035642f433bc1a1d49e545c2
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/libs/qmldebug/qmlprofilertraceclient.cpp

@@ -40,6 +40,7 @@ public:
         ,  inProgressRanges(0)
         , maximumTime(0)
         , recording(false)
+        , features(0)
     {
         ::memset(rangeCount, 0, MaximumRangeType * sizeof(int));
     }
@@ -56,6 +57,7 @@ public:
     int rangeCount[MaximumRangeType];
     qint64 maximumTime;
     bool recording;
+    quint64 features;
 };
 
 } // namespace QmlDebug
@@ -68,16 +70,17 @@ void QmlProfilerTraceClientPrivate::sendRecordingStatus(int engineId)
 {
     QByteArray ba;
     QDataStream stream(&ba, QIODevice::WriteOnly);
-    stream << recording;
-    if (engineId != -1)
-        stream << engineId;
+    stream << recording << engineId; // engineId -1 is OK. It means "all of them"
+    if (recording)
+        stream << features;
     q->sendMessage(ba);
 }
 
-QmlProfilerTraceClient::QmlProfilerTraceClient(QmlDebugConnection *client)
+QmlProfilerTraceClient::QmlProfilerTraceClient(QmlDebugConnection *client, quint64 features)
     : QmlDebugClient(QLatin1String("CanvasFrameRate"), client)
     , d(new QmlProfilerTraceClientPrivate(this, client))
 {
+    d->features = features;
     connect(&d->engineControl, SIGNAL(engineAboutToBeAdded(int,QString)),
             this, SLOT(sendRecordingStatus(int)));
 }
@@ -131,6 +134,11 @@ void QmlProfilerTraceClient::setRecording(bool v)
     emit recordingChanged(v);
 }
 
+void QmlProfilerTraceClient::setFeatures(quint64 features)
+{
+    d->features = features;
+}
+
 void QmlProfilerTraceClient::setRecordingFromServer(bool v)
 {
     if (v == d->recording)