private void UpdateSelectionState()
{
navMenuList.SetSelectedItem(null);
bottomNavMenuList.SetSelectedItem(null);
INavigationBarMenuItem itemToHighlight = null;
ViewModelArgs viewModelArgs = null;
var parameter = _lastSourcePageEventArgs?.Item2 as string;
if (parameter != null)
{
viewModelArgs = SerializationHelper.Deserialize <ViewModelArgs>(parameter);
}
// We only highlight the current page in the navigation bar
// if navigation arguments tell us to.
if (viewModelArgs == null ||
viewModelArgs.HighlightOnNavigationBar)
{
itemToHighlight =
(from p in _viewModel.NavigationBarMenuItems.Union(_viewModel.BottomNavigationBarMenuItems)
where p.DestPage == _lastSourcePageEventArgs?.Item1
select p)
.SingleOrDefault();
}
togglePaneButton.Background = itemToHighlight == null ?
new SolidColorBrush((Color)Application.Current.Resources["AppAccentLightColor"]) :
new SolidColorBrush(Colors.White);
ListViewItem container;
if (navMenuList.Items != null && navMenuList.Items.Contains(itemToHighlight))
{
container = (ListViewItem)navMenuList.ContainerFromItem(itemToHighlight);
}
else
{
container = (ListViewItem)bottomNavMenuList.ContainerFromItem(itemToHighlight);
}
// While updating the selection state of the item prevent it from taking keyboard focus. If a
// user is invoking the back button via the keyboard causing the selected nav menu item to change
// then focus will remain on the back button.
if (container != null)
{
container.IsTabStop = false;
}
navMenuList.SetSelectedItem(container);
bottomNavMenuList.SetSelectedItem(container);
if (container != null)
{
container.IsTabStop = true;
}
}
private void UpdateSelectionState(Type sourcePageType)
{
navMenuList.SetSelectedItem(null);
bottomNavMenuList.SetSelectedItem(null);
INavigationBarMenuItem item = (from p in _viewModel.NavigationBarMenuItems.Union(_viewModel.BottomNavigationBarMenuItems)
where p.DestPage == sourcePageType
select p)
.SingleOrDefault();
togglePaneButton.Background = item == null ?
new SolidColorBrush((Color)Application.Current.Resources["AppAccentLightColor"]) :
new SolidColorBrush(Colors.Transparent);
ListViewItem container = null;
if (navMenuList.Items != null && navMenuList.Items.Contains(item))
{
container = (ListViewItem)navMenuList.ContainerFromItem(item);
}
else if (bottomNavMenuList.Items != null && bottomNavMenuList.Items.Contains(item))
{
container = (ListViewItem)bottomNavMenuList.ContainerFromItem(item);
}
// While updating the selection state of the item prevent it from taking keyboard focus. If a
// user is invoking the back button via the keyboard causing the selected nav menu item to change
// then focus will remain on the back button.
if (container != null)
{
container.IsTabStop = false;
}
navMenuList.SetSelectedItem(container);
bottomNavMenuList.SetSelectedItem(container);
if (container != null)
{
container.IsTabStop = true;
}
}
