private void DataGridEditingExtender_PreviewCurrentChanging(object sender, PreviewChangeEventArgs e)
{
UniversalCellInfo oldCell = (UniversalCellInfo)(e.OldValue ?? new UniversalCellInfo());
UniversalCellInfo newCell = (UniversalCellInfo)(e.NewValue ?? new UniversalCellInfo());
var focusManager = UIServiceProvider.GetService <IFocusManagementService>(TargetElement);
using (focusManager.DeferFocusUpdate())
{
if (!CanLeaveCurrentCell())
{
CancelNavigation(e);
}
else
if (oldCell.Item != newCell.Item)
{
log.DebugFormat("Processing line change event on {0}", this);
if (!CanLeaveCurrentLine())
{
CancelNavigation(e);
}
}
}
}
private void currentCellService_PreviewCurrentCellChanging(object sender, PreviewChangeEventArgs e)
{
if (e.NewValue == null || e.OldValue == null)
{
isChangingItem = true;
}
isChangingItem = ((UniversalCellInfo)e.NewValue).Item != ((UniversalCellInfo)e.OldValue).Item;
}
void CancelNavigation(PreviewChangeEventArgs e)
{
e.Canceled = true;
log.DebugFormat("-- Navigation canceled.");
}