[SOLVED] TStringGrid col and column relationship

[EganSolo]

What's the relationship between col and column in TStringGrid?

Say I have a grid with eight columns, some visible and some not. For instance, suppose columns 2,3 and 4 are not visible, then I'm assuming that the relationship between column and col indices is as follows:

Column	Col
0	0
1	1
2	-
3	-
4	-
5	1
6	2
7	3

For static grids, where the columns are known at design time, the mapping can be done in code, but for dynamic grids that build their columns at run-time, there's a need to figure out the mapping between columns and cols.

When handling an event such as Drawcell, the parameter is a col index. Is there a method to tell me the equivalent column index, or must I code for this?

Thanks.
 

[wp]

If you mean with "Col" the column index passed to the OnDrawCell or OnPrepareCanvas event, and with "Column" a column added to the Columns index, then I would say that it does not matter wheter a column is hidden or not. Painting iterates over all cells, if a cell is in a hidden column then the painting method just exits immediately. Therefore the relation between the ACol parameter and the Column.Index is always: ACol := Column.Index + FixedCols.

[EganSolo]

Thanks wp! Really appreciate the answer!