QmlProfiler: Reduce the amount of useless signals on item selection

By passing signals with identification information of varying accurary
between the different views the event being selected could be changed
while it was selected. By checking the current selection against the
information given in the signal and not reselecting when it matches the
situation is improved.

Also, the selection methods are given more appropriate names. We hardly
ever want to select the "next" event, but rather the "best fitting" one.

Task-number: QTCREATORBUG-11945
Change-Id: I659b4929cb88f4c931a0893aa95a3bc92da5a23b
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/qml/MainView.qml

@@ -162,14 +162,12 @@ Rectangle {
         rangeDetails.isBindingLoop = false;
     }
 
-    function selectNextByHash(hash) {
+    function selectById(eventId)
-        var eventId = qmlProfilerModelProxy.getEventIdForHash(hash);
-        if (eventId !== -1)
-            selectNextById(eventId);
-    }
-
-    function selectNextById(eventId)
     {
+        if (eventId === -1 ||
+                eventId === qmlProfilerModelProxy.getEventId(view.selectedModel, view.selectedItem))
+            return;
+
         // this is a slot responding to events from the other pane
         // which tracks only events from the basic model
         if (!lockItemSelection) {

src/plugins/qmlprofiler/qmlprofilereventview.cpp

@@ -699,13 +699,22 @@ void QmlProfilerEventsMainView::jumpToItem(const QModelIndex &index)
     d->m_preventSelectBounce = false;
 }
 
+void QmlProfilerEventsMainView::selectItem(const QStandardItem *item)
+{
+    // If the same item is already selected, don't reselect it.
+    QModelIndex index = d->m_model->indexFromItem(item);
+    if (index != currentIndex()) {
+        setCurrentIndex(index);
+        jumpToItem(index);
+    }
+}
+
 void QmlProfilerEventsMainView::selectEvent(const QString &eventHash)
 {
     for (int i=0; i<d->m_model->rowCount(); i++) {
         QStandardItem *infoItem = d->m_model->item(i, 0);
         if (infoItem->data(EventHashStrRole).toString() == eventHash) {
-            setCurrentIndex(d->m_model->indexFromItem(infoItem));
+            selectItem(infoItem);
-            jumpToItem(currentIndex());
             return;
         }
     }
@@ -718,13 +727,11 @@ void QmlProfilerEventsMainView::selectEventByLocation(const QString &filename, i
 
     for (int i=0; i<d->m_model->rowCount(); i++) {
         QStandardItem *infoItem = d->m_model->item(i, 0);
-        if (currentIndex() != d->m_model->indexFromItem(infoItem) &&
+        if (infoItem->data(FilenameRole).toString() == filename &&
-                infoItem->data(FilenameRole).toString() == filename &&
                 infoItem->data(LineRole).toInt() == line &&
                 (column == -1 ||
                 infoItem->data(ColumnRole).toInt() == column)) {
-            setCurrentIndex(d->m_model->indexFromItem(infoItem));
+            selectItem(infoItem);
-            jumpToItem(currentIndex());
             return;
         }
     }

src/plugins/qmlprofiler/qmlprofilereventview.h

@@ -143,6 +143,7 @@ private slots:
     void profilerDataModelStateChanged();
 
 private:
+    void selectItem(const QStandardItem *item);
     void setHeaderLabels();
     void parseModelProxy();
 

src/plugins/qmlprofiler/qmlprofilertraceview.cpp

@@ -371,24 +371,23 @@ void QmlProfilerTraceView::clear()
     QMetaObject::invokeMethod(d->m_timebar->rootObject(), "clear");
 }
 
-void QmlProfilerTraceView::selectNextEventByHash(const QString &hash)
+void QmlProfilerTraceView::selectByHash(const QString &hash)
 {
     QQuickItem *rootObject = d->m_mainView->rootObject();
 
     if (rootObject)
-        QMetaObject::invokeMethod(rootObject, "selectNextByHash",
+        QMetaObject::invokeMethod(rootObject, "selectById",
-                                  Q_ARG(QVariant,QVariant(hash)));
+                Q_ARG(QVariant,QVariant(d->m_modelProxy->getEventIdForHash(hash))));
 }
 
-void QmlProfilerTraceView::selectNextEventByLocation(const QString &filename, const int line, const int column)
+void QmlProfilerTraceView::selectBySourceLocation(const QString &filename, int line, int column)
 {
     int eventId = d->m_modelProxy->getEventIdForLocation(filename, line, column);
 
     if (eventId != -1) {
         QQuickItem *rootObject = d->m_mainView->rootObject();
         if (rootObject)
-            QMetaObject::invokeMethod(rootObject, "selectNextById",
+            QMetaObject::invokeMethod(rootObject, "selectById", Q_ARG(QVariant,QVariant(eventId)));
-                                      Q_ARG(QVariant,QVariant(eventId)));
     }
 }
 

src/plugins/qmlprofiler/qmlprofilertraceview.h

@@ -100,8 +100,8 @@ public:
 
 public slots:
     void clear();
-    void selectNextEventByHash(const QString &eventHash);
+    void selectByHash(const QString &eventHash);
-    void selectNextEventByLocation(const QString &filename, const int line, const int column);
+    void selectBySourceLocation(const QString &filename, int line, int column);
 
 private slots:
     void updateCursorPosition();

src/plugins/qmlprofiler/qmlprofilerviewmanager.cpp

@@ -105,8 +105,8 @@ void QmlProfilerViewManager::createViews()
                                                 d->profilerModelManager);
     connect(d->eventsView, SIGNAL(gotoSourceLocation(QString,int,int)), this,
             SIGNAL(gotoSourceLocation(QString,int,int)));
-    connect(d->eventsView, SIGNAL(eventSelectedByHash(QString)), d->traceView,
+    connect(d->eventsView, SIGNAL(eventSelectedByHash(QString)),
-            SLOT(selectNextEventByHash(QString)));
+            d->traceView, SLOT(selectByHash(QString)));
     connect(d->traceView, SIGNAL(gotoSourceLocation(QString,int,int)),
             d->eventsView, SLOT(selectBySourceLocation(QString,int,int)));
 
@@ -117,7 +117,7 @@ void QmlProfilerViewManager::createViews()
     connect(d->traceView, SIGNAL(gotoSourceLocation(QString,int,int)),
             d->v8profilerView, SLOT(selectBySourceLocation(QString,int,int)));
     connect(d->v8profilerView, SIGNAL(gotoSourceLocation(QString,int,int)),
-            d->traceView, SLOT(selectNextEventByLocation(QString,int,int)));
+            d->traceView, SLOT(selectBySourceLocation(QString,int,int)));
     connect(d->v8profilerView, SIGNAL(gotoSourceLocation(QString,int,int)),
             d->eventsView, SLOT(selectBySourceLocation(QString,int,int)));
     connect(d->eventsView, SIGNAL(gotoSourceLocation(QString,int,int)),

src/plugins/qmlprofiler/timelinerenderer.cpp

@@ -309,11 +309,15 @@ void TimelineRenderer::manageClicked()
             setSelectionLocked(!m_selectionLocked);
         else
             setSelectionLocked(true);
+
+        // itemPressed() will trigger an update of the events and JavaScript views. Make sure the
+        // correct event is already selected when that happens, to prevent confusion.
+        selectFromId(m_currentSelection.modelIndex, m_currentSelection.eventIndex);
         emit itemPressed(m_currentSelection.modelIndex, m_currentSelection.eventIndex);
     } else {
         setSelectionLocked(false);
+        selectFromId(m_currentSelection.modelIndex, m_currentSelection.eventIndex);
     }
-    selectFromId(m_currentSelection.modelIndex, m_currentSelection.eventIndex);
 }
 
 void TimelineRenderer::manageHovered(int mouseX, int mouseY)