Hello Pradip,
Here is my latest version:

• Separation from ScatterDraw is complete (although I am not satified about how I did it : I had to copy the drawing methods,and this is not good but it will do for the moment)
• Added ability to Refresh owner graph from a GraphSerie
  This is what was missing in SimpleJobSerie and it's more open to other usages
• replaced all dynamic_cast<> left in code with static_cast<>
• Finished memory cleaning of GraphSeries (their was a memory leak)
• Did some cleaning of management of auto color of series
• Added possibility to change legend text color : if NULL, text will have same color as serie, otherwise it will have the color set for legend test (black by default)

• Great, now it compiles without ScatterDraw
• Refreshing owner graph works quite well, I can use it now for that selection, but as you said it repaints the whole graph, so may not be optimal. Can the PaintOne method help in this scenario?
• Okay
• Right, had noticed some memory leak before, will let you know if I encounter that now
• Not using for Gantt, will check for other usage
• So thoughtful! Not using for Gantt, will check for other usage