[wxhaskell-users] problems with grid

[miguel v. c. <muc...@ho...>]

how i can get selected cells in grid ?. i use  the function 
gridGetSelectedCells (i have selected cells in grid) and then i use 
gridCellCoordsArrayGetCount to get the number of cells selected but the 
result is nothing (0). i don't know what i have to do or what is what i'm 
wrong. thanks

code example :

        do  {putStrLn ("llega aqui");
             	coordenadas <- gridGetSelectedCells grid;  ( is coordenadas 
the selected cells ? )
	--columnas_seleccionadas <- gridGetSelectedCols grid;
	--filas_seleccionadas <- gridGetSelectedRows grid                           
    		numero_celdas <- gridCellCoordsArrayGetCount coordenadas;( number of 
selectedcells ?)
                --gridClearSelection grid;
                --seleccionada <-gridIsInSelection grid 3 3;
                p <- gridCellCoordsArrayItem coordenadas 1;  ( xy of the 
first selected cells ?)
                putStrLn (show p) --    ( do exception. why ?)
               }