position of a table cell in a gui

Hello,
I am building a gui and this gui has table panel. I have add the functionality to open a combobox when I click on a cell in a certain column. When the table gets to long for the table panel, scroll bars will appear on the side of the table. How do I get the actual y position of a selected cell in the table, when I have scrolled?
for example: based on the row height I know that y position of a cell in the sixed row, but when I have scrolled the table, the sixed row could actually be positioned at the y position of the forth row. In this case I would not want my combo box to be shown at the acual y position of the sixed row, but at the y position of the fourth row.

I hope someone can help me.

Esther

You can use the scrollinfo() command to get how many pixels the table has been scrolled. You can then use that value to calculate where the clicked cell is.

scrollinfo(node("/TheTable",c),0,1,4) will tell you how many pixels down you have scrolled.