protected override IList <FrameworkElement> GetCells()
{
var vte = VisualTreeHelpers.GetVisualTreeEnumerator(Row, (v) => { return(v is VirtualTableCell); }, System.Windows.Input.FocusNavigationDirection.Next);
var cells = new List <FrameworkElement>();
while (vte.MoveNext())
{
cells.Add(vte.Current as VirtualTableCell);
}
return(cells);
}
public void UpdateFocus()
{
if (focusDeferCount > 0)
{
hasPendingFocus = true;
return;
}
hasPendingFocus = false;
if (!TargetElement.IsKeyboardFocusWithin)
{
log.DebugFormat("Ignoring UpdateFocus() request on {0}, because it does not have keyboard focus.", TargetElement);
return;
}
log.DebugFormat("Begin updating focus on {0}", TargetElement);
if (nextFocusUpdateOperation != null)
{
nextFocusUpdateOperation.Abort();
}
IsRestoringFocusOnElement = isRestoringState.IsSet;
nextFocusUpdateOperation = TargetElement.Dispatcher.BeginInvoke(DispatcherPriority.Input, new Action(() =>
{
using (new DisposalActionCaller(() => IsRestoringFocusOnElement = false))
{
log.DebugFormat("Updating focus on {0}", TargetElement);
using (LoggingExtensions.Indent())
{
//IElementEditStateService editStateService = null;
//if (currentCellService.CurrentItemContainer != null)
// editStateService = UIServiceProvider.GetService<IElementEditStateService>(currentCellService.CurrentItemContainer, false);
//if (editStateService == null)
// editStateService = UIServiceProvider.GetService<IElementEditStateService>(TargetElement);
var elementToFocus = currentCellService.CurrentCellContainer;
if (elementToFocus == null)
{
return;
}
if (elementToFocus.IsFocused)
{
log.DebugFormat("The cell {0} is already in focus.", elementToFocus);
return;
}
var vte = VisualTreeHelpers.GetVisualTreeEnumerator(elementToFocus,
(v) => { return((v is UIElement) && ((UIElement)v).Focusable); }, FocusNavigationDirection.Next);
while (vte.MoveNext())
{
elementToFocus = vte.Current as FrameworkElement;
}
log.DebugFormat("Trying to set focus on element {0}", elementToFocus);
using (isUpdatingFocus.Set())
{
bool isFocused = elementToFocus.Focus();
log.DebugFormat("Focus result: {0}, Focused element is {1}", isFocused, Keyboard.FocusedElement);
}
isFirstFocus = false;
nextFocusUpdateOperation = null;
}
}
}));
}