SMART datagrid :: visibleItems

DataLudi.ColumnGroup.visibleItems property

Return only these being displayed among the Columns included in this group as array.

You can check the display state of column by GridColumn.visible property.

Code -1

    var columns = group.visibleItems();
    for (var i = 0; i < columns.length; i++) {
        columns[i].setVisible(false);
    }