public void PreviewItemHotKey(KeyEventArgs e)
{
if (e.Handled)
{
return;
}
if (SelectedItem != null && e.Key == Key.Enter)
{
ExecuteCommandSource(this);
return;
}
var selectedItem = ActualItemsSource.FirstOrDefault(p => p.HotKey == e.Key);
if (selectedItem != null)
{
SelectedItem = selectedItem;
if (_list != null && _list.SelectedIndex >= 0)
{
_list.SetSelected(_list.SelectedIndex);
}
UpdateEditValue();
ExecuteCommandSource(this);
e.Handled = true;
}
}
protected virtual void OnItemsSourceChanged()
{
ActualItemsSource = null;
CurrentIndex = 0;
try
{
if (ItemsSource == null || ItemsSource.Count == 0)
{
return;
}
if (EditValue != null)
{
var item = FindItem(ItemsSource);
if (item != null)
{
var index = ItemsSource.IndexOf(item);
if (index >= 0)
{
var currentIndex = index / MaxRowsOnPage * MaxRowsOnPage;
var rows = TotalRowCount();
if (currentIndex > rows)
{
currentIndex = rows - 1;
}
CurrentIndex = currentIndex;
}
}
}
ScrollingItems();
if (ActualItemsSource != null)
{
if (EditValue != null)
{
SelectedItem = FindItem(ActualItemsSource);
}
if (SelectedItem == null)
{
SelectedItem = ActualItemsSource.FirstOrDefault();
}
if (EditValue == null && SelectedItem != null && SelectedItem.Value != null)
{
EditValue = SelectedItem.Value.Id;
}
}
}
finally
{
if (!string.IsNullOrEmpty(TotalRowsDisplayFormat))
{
TotalRowsInfo = string.Format(TotalRowsDisplayFormat, TotalRowCount());
}
}
}
public ICollection <object> GetRecordsBy(uint StartingIndex, uint NumberOfRecords, object FilterTag)
{
if (StartingIndex >= ActualItemsSource.Count())
{
return(new List <object>());
}
List <object> result = new List <object>();
for (int i = (int)StartingIndex; i < ActualItemsSource.Count() && i < StartingIndex + NumberOfRecords; i++)
{
result.Add(ActualItemsSource.ElementAt(i));
}
return(result.ToList <object>());
}
public uint GetTotalCount()
{
return((uint)ActualItemsSource.Count());
}
