protected override void OnOpened(EventArgs e)
{
base.OnOpened(e);
_grid = this.GetVisualParent<CustomDataGrid>();
var header = this.GetVisualParent<DataGridColumnHeader>();
_column = header.Column;
var listCollectionView = _grid.Items.SourceCollection as ListCollectionView;
if (listCollectionView != null && (listCollectionView.IsAddingNew || listCollectionView.IsEditingItem))
{
IsOpen = false;
return;
}
if (GetFiltersContainer(_grid) == null)
{
var container = new FiltersContainer();
SetFiltersContainer(_grid, container);
}
if (_column == null) return;
var itemsOfSourceCollection = ((ListCollectionView) _grid.Items.SourceCollection).SourceCollection.Cast<object>();
var namesCollection = GetNamesOfItemsFromSourceCollection(itemsOfSourceCollection);
if (namesCollection == null) return;
var filterItems = namesCollection.ConvertAll(r => new FilterItem(r) {IsChecked = true});
ResetToLastSelectedItemsOfFiltering(filterItems);
FilterItems = CollectionViewSource.GetDefaultView(filterItems);
FilterItems.SortDescriptions.Add(new SortDescription("Name", ListSortDirection.Ascending));
SearchContent = "";
}
private void MakeFilter(FiltersContainer container)
{
var listCollectionView = ((ListCollectionView) _grid.Items.SourceCollection);
listCollectionView.CustomSort = null;
_grid.Columns.ToList().ForEach(r => r.SortDirection = null);
_grid.Items.Filter += container.MakeFilterOnGrid;
}
public static void SetFiltersContainer(DataGrid grid, FiltersContainer value)
{
grid.SetValue(FiltersContainerProperty, value);
}
