see the image below.
The daytimes a person has to work can differ from day by day. We know what times he or she starts/end has breaks.
We need to show this (not as real items, just color the cell with a different background color).
What we would like to see is an event like "OnDrawColumsCell" with params like day, starttime/endtime, color and text
So we can check the day/start/end time to see what color to use and wat text the cell should contain.
This way we can show our users exactly their working times.