QmlProfiler: Reset the zoom control only when we're finished loading

Drop the timeChanged signal of QmlProfilerTraceTime, too, as that
doesn't serve a purpose anymore. We don't want intermittent changes
of the trace time to be reflected in the UI when loading.

Change-Id: I85f18b90fc404ec254c68625104d3e3f9077a1d9
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilermodelmanager.cpp

@@ -93,7 +93,6 @@ void QmlProfilerTraceTime::setTime(qint64 startTime, qint64 endTime)
     if (startTime != m_startTime || endTime != m_endTime) {
         m_startTime = startTime;
         m_endTime = endTime;
-        emit timeChanged(startTime, endTime);
     }
 }
 
@@ -105,7 +104,6 @@ void QmlProfilerTraceTime::decreaseStartTime(qint64 time)
             m_endTime = m_startTime;
         else
             QTC_ASSERT(m_endTime >= m_startTime, m_endTime = m_startTime);
-        emit timeChanged(time, m_endTime);
     }
 }
 
@@ -117,7 +115,6 @@ void QmlProfilerTraceTime::increaseEndTime(qint64 time)
             m_startTime = m_endTime;
         else
             QTC_ASSERT(m_endTime >= m_startTime, m_startTime = m_endTime);
-        emit timeChanged(m_startTime, time);
     }
 }
 

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -51,9 +51,6 @@ public:
     qint64 endTime() const;
     qint64 duration() const;
 
-signals:
-    void timeChanged(qint64,qint64);
-
 public slots:
     void clear();
 

src/plugins/qmlprofiler/qmlprofilertraceview.cpp

@@ -90,10 +90,15 @@ QmlProfilerTraceView::QmlProfilerTraceView(QWidget *parent, QmlProfilerViewManag
     setObjectName(QLatin1String("QML Profiler"));
 
     d->m_zoomControl = new Timeline::TimelineZoomControl(this);
-    connect(modelManager->traceTime(), &QmlProfilerTraceTime::timeChanged,
-            this, [this](qint64 start, qint64 end) {
-        d->m_zoomControl->setTrace(start, end);
-        d->m_zoomControl->setRange(start, start + (end - start) / 10);
+    connect(modelManager, &QmlProfilerModelManager::stateChanged, this, [modelManager, this]() {
+        if (modelManager->state() == QmlProfilerModelManager::Done) {
+            qint64 start = modelManager->traceTime()->startTime();
+            qint64 end = modelManager->traceTime()->endTime();
+            d->m_zoomControl->setTrace(start, end);
+            d->m_zoomControl->setRange(start, start + (end - start) / 10);
+        } else if (modelManager->state() == QmlProfilerModelManager::ClearingData) {
+            d->m_zoomControl->clear();
+        }
     });
 
     QVBoxLayout *groupLayout = new QVBoxLayout;