private void OnSelectionChanged()
{
if (SelectionChangedScope.IsInScope)
{
return;
}
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Send, new Action(() =>
{
using (SelectionChangedScope.BeginScope())
{
foreach (var item in Owner.Items)
{
if (IsContainedInSelection(item))
{
if (SelectedItem != null)
{
SelectedItem.IsSelected = false;
}
item.IsSelected = true;
SelectedItem = item;
break;
}
}
}
}));
}
public void OnItemDisposed(IListViewModelItem viewModelItem)
{
if (SelectedItem == viewModelItem && viewModelItem.IsSelected)
{
using (SelectionChangedScope.BeginScope()) {
viewModelItem.IsSelected = false;
SelectedItem = null;
}
}
}
public void OnItemCreated(IListViewModelItem viewModelItem)
{
if (SelectedItem == null && IsContainedInSelection(viewModelItem))
{
using (SelectionChangedScope.BeginScope()) {
viewModelItem.IsSelected = true;
SelectedItem = viewModelItem;
}
}
}
public void OnItemDisposed(IListViewModelItem viewModelItem)
{
if (SelectedItems.Contains(viewModelItem))
{
using (SelectionChangedScope.BeginScope()) {
viewModelItem.IsSelected = false;
selectedItems.Remove(viewModelItem);
}
}
}
public void OnItemCreated(IListViewModelItem viewModelItem)
{
if (IsContainedInSelection(viewModelItem))
{
using (SelectionChangedScope.BeginScope()) {
viewModelItem.IsSelected = true;
selectedItems.Add(viewModelItem);
}
}
}
private void OnTimerElapsed(object sender, ElapsedEventArgs e)
{
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Send, new Action(() =>
{
using (SelectionChangedScope.BeginScope()) {
if (SelectedItem != null)
{
SelectedItem.IsSelected = false;
}
SelectedItem = LastSelectedItem;
Selection.Value = (T)LastSelectedItem?.Value;
}
LastSelectedItem = null;
Timer.Stop();
}));
}
public void OnItemSelectionStatusChanged(IListViewModelItem viewModelItem)
{
if (SelectionChangedScope.IsInScope)
{
return;
}
if (Timer.Enabled)
{
Timer.Stop();
}
if (!SelectionChangedItems.Contains(viewModelItem))
{
SelectionChangedItems.Add(viewModelItem);
}
Timer.Start();
}
public void OnItemSelectionStatusChanged(IListViewModelItem viewModelItem)
{
if (SelectionChangedScope.IsInScope)
{
return;
}
if (Timer.Enabled)
{
Timer.Stop();
}
if (LastSelectedItem == viewModelItem && !viewModelItem.IsSelected)
{
LastSelectedItem = null;
}
else if (viewModelItem.IsSelected)
{
LastSelectedItem = viewModelItem;
}
Timer.Start();
}
public bool IsContainedInSelection(IListViewModelItem item)
{
return(item.Value?.Equals(Selection.Value) ?? false);
}
public bool IsContainedInSelection(IListViewModelItem item)
{
return(Selection.Value.Contains((T)item.Value));
}
