protected override IGridCellBuilder CreateHeaderBuilderCore()
{
IGridCellBuilder builder = null;
HeaderHtmlAttributes.Add("data-field", Member);
HeaderHtmlAttributes.Add("data-title", Title);
if (!Groupable)
{
HeaderHtmlAttributes.Add("data-groupable", "false");
}
AppendAggregateAttributes();
if (Sortable && Grid.Sortable.Enabled && !HeaderTemplate.HasValue())
{
builder = new GridSortableHeaderCellBuilder(HeaderHtmlAttributes, GetSortUrl(), SortDirection, AppendHeaderContent);
}
else
{
builder = base.CreateHeaderBuilderCore();
}
if (Filterable && Grid.Filterable.Enabled && !Grid.ColumnMenu.Enabled)
{
var filtered = Grid.DataSource.Filters
.SelectMemberDescriptors()
.Any(filter => filter.Member.IsCaseInsensitiveEqual(Member));
builder.Decorators.Add(new GridFilterCellDecorator(filtered));
}
return(builder);
}
private void AppendAggregateAttributes()
{
var aggregates = Grid.DataSource.Aggregates
.Where(agg => agg.Member == Member)
.SelectMany(agg => agg.Aggregates)
.Select(agg => agg.AggregateMethodName.ToLowerInvariant());
if (aggregates.Any())
{
HeaderHtmlAttributes.Add("data-aggregates", String.Join(",", aggregates.ToArray()));
}
}