Add key to TimelineItem.

server/TracyTimelineItem.hpp

@@ -14,7 +14,7 @@ class Worker;
 class TimelineItem
 {
 public:
-    TimelineItem( View& view, Worker& worker );
+    TimelineItem( View& view, Worker& worker, const void* key );
     virtual ~TimelineItem() = default;
 
     // draws the timeilne item and also updates the next frame height value
@@ -29,6 +29,8 @@ public:
     // returns 0 instead of the correct value for the first frame
     int GetNextFrameHeight() const { return m_height; }
 
+    const void* GetKey() const { return m_key; }
+
 protected:
     virtual uint32_t HeaderColor() const = 0;
     virtual uint32_t HeaderColorInactive() const = 0;
@@ -54,6 +56,8 @@ private:
 
     int m_height;
 
+    const void* m_key;
+
 protected:
     View& m_view;
     Worker& m_worker;