Fixed column and row header for DataTable on Flutter Dart

Question

I\'ve build a table on Flutter Dart using DataTable. This table is very large, and I\'m using both Vertical and Horizontal scrolling. When scrolling I lose refe

Answer 1

Good afternoon, I got your code and I'm adapting for testing, I created a dynamic list for _fixedColCells

worked perfectly,

var disciplina =[];
     for (var c = 0; c <= notas?.length -1; c++) {
     disciplina.add(notas[c].disciplina.toString())  ;
    }

..... fixedColCells: disciplina, ....

_fixedRowCells is a fixed String list, so I used the same variable just by hitting cell labels

but _rowsCells, which by the statement is a >, set the routine is equal to the fixed variable of the example, but gives error.

type List is not a subtype of type List>

and print output basically equals fixed variable _rowsCells example, see below

[[8.5, 7.0, 6.5, 0.0, 5.5, 5.5, 5.5, 0.0, 0.0, 5.5, ATIVA], 
[8.5, 6.0, 8.5, 0.0, 6.0, 6.0, 6.0, 0.0, 0.0, 6.0, ATIVA], 
[7.5, 7.5, 6.0, 0.0, 5.5, 5.5, 5.5, 0.0, 0.0, 5.5, ATIVA], 
[9.5, 9.0, 8.0, 0.0, 6.5, 6.5, 6.5, 0.0, 0.0, 6.5, ATIVA], 
[7.5, 6.0, 8.0, 0.0, 5.5, 5.5, 5.5, 0.0, 0.0, 5.5, ATIVA], 
[10.0, 7.5, 8.5, 0.0, 6.5, 6.5, 6.5, 0.0, 0.0, 6.5, ATIVA], 
[9.0, 9.5, 8.0, 0.0, 6.5, 6.5, 6.5, 0.0, 0.0, 6.5, ATIVA], 
[10.0, 10.0, 10.0, 0.0, 7.5, 7.5, 7.5, 0.0, 0.0, 7.5, ATIVA], 
[10.0, 9.5, 9.5, 0.0, 7.5, 7.5, 7.5, 0.0, 0.0, 7.5, ATIVA], 
[9.0, 7.0, 8.5, 0.0, 6.0, 6.5, 6.5, 0.0, 0.0, 6.0, ATIVA], 
[6.0, 6.0, 6.5, 0.0, 4.5, 4.5, 4.5, 0.0, 0.0, 4.5, ATIVA], 
[9.0, 7.5, 8.5, 0.0, 6.5, 6.5, 6.5, 0.0, 0.0, 6.5, ATIVA], 
[5.0, 5.0, 7.5, 0.0, 4.5, 4.5, 4.5, 0.0, 0.0, 4.5, ATIVA], 
[8.5, 9.0, 8.0, 0.0, 6.5, 6.5, 6.5, 0.0, 0.0, 6.5, ATIVA]]

Thanks for the possible help.