QmlProfiler: Add a QmlTypedEvent and extend QmlEvent

The QmlTypedEvent is mainly useful to read a generic QmlEvent and
QmlEventType from a QPacket. QmlEventType has a stream operator to do
exactly that. QmlEvent also gets further options to store 32-bit data
in addition to 64- and 8-bit data. Also, with the more generic storage
layout we can reduce the memory consumption of range events by 50%.
This comes at the cost of additional memory allocations for non-range
events, but as non-range events are significantly less frequent than
range events, this is a good tradeoff. Finally the new storage layout
lends itself to efficient serialization, which will help when
developing new storage and transfer formats for QML traces.

Change-Id: I420de68b0142f23c8fb2ca8b329d7ffe69c83fe0
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/plugins/qmlprofiler/inputeventsmodel.cpp

@@ -153,8 +153,8 @@ void InputEventsModel::loadData()
             continue;
 
         m_data.insert(insert(event.timestamp(), 0, type.detailType),
-                      InputEvent(static_cast<InputEventType>(event.numericData(0)),
-                                 event.numericData(1), event.numericData(2)));
+                      InputEvent(static_cast<InputEventType>(event.number<qint32>(0)),
+                                 event.number<qint32>(1), event.number<qint32>(2)));
 
         if (type.detailType == Mouse) {
             if (m_mouseTypeId == -1)