QmlProfiler: next and previous buttons have now consistent behaviour

Having them behave differently depending on the locked mode was
confusing.  This patch moves that functionality to the event labels,
thus next and prev just select next and previous events in the
timeline, in strict chronological order.

Change-Id: I5bd996199dd6a4af4c65e3205493f17495d0135b
Reviewed-by: Aurindam Jana <aurindam.jana@nokia.com>

src/plugins/qmlprofiler/qml/Label.qml

@@ -39,6 +39,7 @@ Item {
     property int typeIndex: index
 
     property variant descriptions: []
+    property variant eventIds: []
 
     height: root.singleRowHeight
     width: 150
@@ -48,7 +49,7 @@ Item {
         rE[typeIndex] = expanded;
         labels.rowExpanded = rE;
         backgroundMarks.requestRedraw();
-        view.rowExpanded(typeIndex, expanded);
+        view.setRowExpanded(typeIndex, expanded);
         updateHeight();
     }
 
@@ -65,13 +66,18 @@ Item {
         target: qmlEventList
         onDataReady: {
             var desc=[];
-            for (var i=0; i<qmlEventList.uniqueEventsOfType(typeIndex); i++)
+            var ids=[];
+            for (var i=0; i<qmlEventList.uniqueEventsOfType(typeIndex); i++) {
                 desc[i] = qmlEventList.eventTextForType(typeIndex, i);
+                ids[i] = qmlEventList.eventIdForType(typeIndex, i);
+            }
             descriptions = desc;
+            eventIds = ids;
             updateHeight();
         }
         onDataClear: {
             descriptions = [];
+            eventIds = [];
             updateHeight();
         }
     }
@@ -113,6 +119,15 @@ Item {
                     elide: Text.ElideRight
                     verticalAlignment: Text.AlignVCenter
                 }
+                MouseArea {
+                    anchors.fill: parent
+                    onClicked: {
+                        if (mouse.modifiers & Qt.ShiftModifier)
+                            view.selectPrevFromId(eventIds[index]);
+                        else
+                            view.selectNextFromId(eventIds[index]);
+                    }
+                }
             }
         }
     }