QmlProfiler: Add another data state "ClearingData"

This allows us to steer the timeline models in a more fine grained
way and avoid duplicate processing of the same data. We don't need
to rebuild everything on stateChanged of the model manager then.

Task-number: QTCREATORBUG-10950
Change-Id: I2aa9a96a33c602f062fc3b644ac06280ba7cd45a
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/abstracttimelinemodel.cpp

@@ -41,7 +41,6 @@ void AbstractTimelineModel::setModelManager(QmlProfilerModelManager *modelManage
 {
     m_modelManager = modelManager;
     connect(modelManager->simpleModel(),SIGNAL(changed()),this,SLOT(dataChanged()));
-    connect(modelManager,SIGNAL(stateChanged()),this,SLOT(dataChanged()));
     m_modelId = modelManager->registerModelProxy();
 }
 
@@ -85,7 +84,7 @@ void AbstractTimelineModel::dataChanged()
     case QmlProfilerDataState::ProcessingData:
         loadData();
         break;
-    case QmlProfilerDataState::Empty:
+    case QmlProfilerDataState::ClearingData:
         clear();
         break;
     default:

src/plugins/qmlprofiler/qmlprofilereventsmodelproxy.cpp

@@ -99,7 +99,7 @@ void QmlProfilerEventsModelProxy::dataChanged()
     if (d->modelManager->state() == QmlProfilerDataState::ProcessingData)
         loadData();
 
-    if (d->modelManager->state() == QmlProfilerDataState::Empty)
+    if (d->modelManager->state() == QmlProfilerDataState::ClearingData)
         clear();
 }
 

src/plugins/qmlprofiler/qmlprofilermodelmanager.cpp

@@ -57,6 +57,9 @@ void QmlProfilerDataState::setState(QmlProfilerDataState::State state)
         return;
 
     switch (state) {
+        case ClearingData:
+            QTC_ASSERT(m_state == Done || m_state == Empty, /**/);
+        break;
         case Empty:
             // if it's not empty, complain but go on
             QTC_ASSERT(m_modelManager->isEmpty(), /**/);
@@ -345,6 +348,7 @@ QmlProfilerDataState::State QmlProfilerModelManager::state() const
 
 void QmlProfilerModelManager::clear()
 {
+    setState(QmlProfilerDataState::ClearingData);
     for (int i = 0; i < d->partialCounts.count(); i++)
         d->partialCounts[i] = 0;
     d->progress = 0;

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -52,6 +52,7 @@ public:
         Empty,
         AcquiringData,
         ProcessingData,
+        ClearingData,
         Done
     };
 

src/plugins/qmlprofiler/qmlprofilertool.cpp

@@ -522,6 +522,8 @@ void QmlProfilerTool::profilerDataModelStateChanged()
 {
     switch (d->m_profilerModelManager->state()) {
     case QmlProfilerDataState::Empty :
+        break;
+    case QmlProfilerDataState::ClearingData :
         clearDisplay();
         break;
     case QmlProfilerDataState::AcquiringData :

src/plugins/qmlprofiler/qmlprofilertraceview.cpp

@@ -474,7 +474,8 @@ void QmlProfilerTraceView::setAppKilled()
 void QmlProfilerTraceView::profilerDataModelStateChanged()
 {
     switch (d->m_modelManager->state()) {
-        case QmlProfilerDataState::Empty:
+        case QmlProfilerDataState::Empty: break;
+        case QmlProfilerDataState::ClearingData:
             emit enableToolbar(false);
         break;
         case QmlProfilerDataState::AcquiringData: break;