internal static void SetItemDisplayType(DependencyObject obj, NavigationPaneItemDisplayType value)
{
obj.SetValue(ItemDisplayTypeProperty, value);
}
internal int GetLastItemIndex(NavigationPaneItemDisplayType type)
{
int index = -1;
if (type == NavigationPaneItemDisplayType.Large)
{
index = GetFirstItemIndex(NavigationPaneItemDisplayType.Small);
if (index == -1)
index = GetFirstItemIndex(NavigationPaneItemDisplayType.Undefined);
}
else if (type == NavigationPaneItemDisplayType.Small)
index = GetFirstItemIndex(NavigationPaneItemDisplayType.Undefined);
if (index == -1)
index = Items.Count;
while (index-- > 0)
{
DependencyObject item = Items[index] as NavigationPaneItem;
if(item == null)
item = ItemContainerGenerator.ContainerFromIndex(index);
if (!GetIsItemExcluded(item))
break;
}
return index;
}
internal static void SetItemDisplayType(DependencyObject obj, NavigationPaneItemDisplayType value)
{
obj.SetValue(ItemDisplayTypeProperty, value);
}
internal int GetFirstItemIndex(NavigationPaneItemDisplayType type)
{
int reach = 0;
if (type != NavigationPaneItemDisplayType.Large)
reach += LargeItems;
if (type == NavigationPaneItemDisplayType.Undefined && IsSmallItemsVisible)
reach += SmallItems;
int index = 0;
int count = 0;
for (; index < Items.Count && count < reach; index++)
{
NavigationPaneItem item = Items[index] as NavigationPaneItem;
if (item == null)
item = ItemContainerGenerator.ContainerFromIndex(index) as NavigationPaneItem;
if (item != null && !GetIsItemExcluded(item))
count++;
}
if (index == Items.Count)
index = -1;
return index;
}
