private void OnAutoFilterSelectClearAllClick(object sender, RoutedEventArgs e)
{
var fe = sender as FrameworkElement;
if (fe == null)
{
return;
}
var dg = fe.FindParent <DataGridControl>();
if (dg == null)
{
return;
}
var viewSource = dg.ItemsSource as DataGridCollectionView;
if (viewSource == null)
{
return;
}
int filters = 0;
Button button = (Button)sender;
AutoFilterControl autoFilterControl = button.TemplatedParent as AutoFilterControl;
string columnFieldName = autoFilterControl.AutoFilterColumn.FieldName;
bool selectAll = ((string)button.Tag) == "1";
using (viewSource.DeferRefresh())
{
ObservableHashList autoFilterValues = viewSource.AutoFilterValues[columnFieldName] as ObservableHashList;
using (autoFilterValues.DeferINotifyCollectionChanged())
{
autoFilterValues.Clear();
if (selectAll)
{
IList distinctValues = viewSource.DistinctValues[columnFieldName];
foreach (object value in distinctValues)
{
autoFilterValues.Add(value);
}
filters += distinctValues.Count;
}
}
if (selectAll)
{
ListBox listBox = autoFilterControl.DistinctValuesHost as ListBox;
listBox.SelectAll();
}
}
}
internal override void RefreshDistinctValuesForField(DataGridItemPropertyBase dataGridItemProperty)
{
if (dataGridItemProperty == null)
{
return;
}
if (dataGridItemProperty.CalculateDistinctValues == false)
{
return;
}
// List containing current column distinct values
HashSet <object> currentColumnDistinctValues = new HashSet <object>();
ReadOnlyObservableHashList readOnlyColumnDistinctValues = null;
// If the key is not set in DistinctValues yet, do not calculate distinct values for this field
if (!(( DistinctValuesDictionary )this.DistinctValues).InternalTryGetValue(dataGridItemProperty.Name, out readOnlyColumnDistinctValues))
{
return;
}
ObservableHashList columnDistinctValues = readOnlyColumnDistinctValues.InnerObservableHashList;
// We use the DistinctValuesSortComparer if present, else the SortComparer for the DataGridItemProperty, else,
// the Comparer used is the one of the base class.
IComparer distinctValuesSortComparer = dataGridItemProperty.DistinctValuesSortComparer;
if (distinctValuesSortComparer == null)
{
distinctValuesSortComparer = dataGridItemProperty.SortComparer;
}
using (columnDistinctValues.DeferINotifyCollectionChanged())
{
DataGridVirtualizingQueryableCollectionViewGroupRoot rootGroup = this.RootGroup as DataGridVirtualizingQueryableCollectionViewGroupRoot;
Debug.Assert(rootGroup != null);
object[] distinctValues = rootGroup.GetItemPropertyDistinctValues(dataGridItemProperty);
foreach (object distinctValue in distinctValues)
{
// Compute current value to be able to remove unused values
currentColumnDistinctValues.Add(distinctValue);
}
DataGridCollectionViewBase.RemoveUnusedDistinctValues(
distinctValuesSortComparer, currentColumnDistinctValues, columnDistinctValues, null);
}
}