private void ChangeFocusedItem(bool ascendIndex)
{
Type focusedElementType = FocusManager.GetFocusedElement().GetType();
MenuItem item;
int startIndex;
if (focusedElementType == _itemContainerList.GetType() && _items.Count > 0)
{
// focused item is the item container list, so try to set focus to an initial item
startIndex = GetNextItemIndex(-1, ascendIndex);
}
else if (focusedElementType != typeof(MenuItem))
{
// focused item isn't the item container list or a menu item, so ignore
return;
}
else
{
// focused item is already a menu item, so try to set focus to next
item = FocusManager.GetFocusedElement() as MenuItem;
startIndex = GetNextItemIndex(_items.IndexOf(item), ascendIndex);
}
int index = startIndex;
MenuItemBase nextItem = _items[index];
// focus next item, if it's a menu item
if (nextItem.GetType() == typeof(MenuItem))
{
nextItem.Focus(Windows.UI.Xaml.FocusState.Programmatic);
}
else
{
// next element wasn't a MenuItem, so loop through once trying to find the next item
index = GetNextItemIndex(index, ascendIndex);
nextItem = _items[index];
while (nextItem.GetType() != typeof(MenuItem) && index != startIndex)
{
index = GetNextItemIndex(index, ascendIndex);
nextItem = _items[index];
}
if (nextItem.GetType() == typeof(MenuItem))
{
nextItem.Focus(Windows.UI.Xaml.FocusState.Programmatic);
}
}
}
private void ChangeFocusedItem(bool ascendIndex)
{
var focusedElement = FocusManager.GetFocusedElement();
int startIndex;
if (focusedElement != null && ((focusedElement == _itemContainerList || focusedElement == this) && _items.Count > 0))
{
// focused item is the menu or the item container list, so try to set focus to an initial item
startIndex = GetNextItemIndex(-1, ascendIndex);
}
else if (focusedElement != null && (focusedElement is MenuItem && _items.Contains((MenuItem)focusedElement)))
{
// focused item is already one of our menu items, so try to set focus to next
startIndex = GetNextItemIndex(_items.IndexOf((MenuItem)focusedElement), ascendIndex);
}
else
{
// focus is outside of the menu
return;
}
int index = startIndex;
MenuItemBase nextItem = _items[index];
// focus next item, if it's a menu item
if (nextItem is MenuItem)
{
nextItem.Focus(Windows.UI.Xaml.FocusState.Programmatic);
}
else
{
// next element wasn't a MenuItem, so loop through once trying to find the next item
index = GetNextItemIndex(index, ascendIndex);
nextItem = _items[index];
while (nextItem != null && (!(nextItem is MenuItem) && index != startIndex))
{
index = GetNextItemIndex(index, ascendIndex);
nextItem = _items[index];
}
if (nextItem != null && nextItem is MenuItem)
{
nextItem.Focus(Windows.UI.Xaml.FocusState.Programmatic);
}
}
}
