public override IEnumerable <Stop> GetGlobalStops(Visual scope, Visual currentElement, DependencyProperty navigationModeProperty)
{
int scopeTabIndex = KeyboardNavigation.GetTabIndex(scope);
if (IsStop((UIElement)scope) || scope == currentElement)
{
yield return(new Stop(scope, scopeTabIndex));
}
// translate stops to have scope tab index instead of local tab index, local order is kept
foreach (Stop stop in scope.VisualChildren.SelectMany(child => KeyboardNavigationTarget.GetGlobalStops(child, currentElement, navigationModeProperty)).OrderBy(childStop => childStop.TabIndex))
{
yield return(new Stop(stop.Element, scopeTabIndex));
}
}
public override Visual FindPreviousTarget(Visual scope, Stop currentStop, DependencyProperty navigationModeProperty, IStopComparerProvider stopComparerProvider)
{
return(KeyboardNavigationTarget.FindPreviousContainedTarget(scope, currentStop, navigationModeProperty, stopComparerProvider) ??
(scope.VisualParent != null ? KeyboardNavigationTarget.FindPreviousTarget(scope.VisualParent, new Stop(currentStop.Element, KeyboardNavigation.GetTabIndex(scope)), navigationModeProperty, stopComparerProvider) : null)); // translate currentStop and forward request to parent
}
public Stop(Visual element) :
this(element, KeyboardNavigation.GetTabIndex(element))
{
//
}