private void OnNavigatingToPage(object sender, NavigatingCancelEventArgs e)
{
if (e.NavigationMode != NavigationMode.Back || !TopNavigationItems.Any())
{
return;
}
var item = TopNavigationItems.SingleOrDefault(p => p.DestinationPage == e.SourcePageType);
if (item == null && _pageFrame.BackStackDepth > 0)
{
foreach (var entry in _pageFrame.BackStack.Reverse())
{
item = TopNavigationItems.SingleOrDefault(p => p.DestinationPage == entry.SourcePageType);
if (item != null)
{
break;
}
}
}
var container = (ListViewItem)_navTopMenuListView.ContainerFromItem(item);
if (container != null)
{
container.IsTabStop = false;
}
_navTopMenuListView.SetSelectedItem(container);
if (container != null)
{
container.IsTabStop = true;
}
}
private void OnNavigatingToPage(object sender, NavigatingCancelEventArgs e)
{
if (e.NavigationMode != NavigationMode.Back || !TopNavigationItems.Any())
{
return;
}
var item = GetItemFromList(e.SourcePageType);
if (item == null && _pageFrame.BackStackDepth > 0)
{
foreach (var entry in _pageFrame.BackStack.Reverse())
{
if (entry.SourcePageType == typeof(PlaylistView))
{
var para = entry.Parameter; //get previous entry's parameter
if (para is Playlist)
{
item = PlaylistsItems.SingleOrDefault(p => p.Label == (para as Playlist).Name); //search for the item in PlaylistItems with the same label as in parameters Name.
}
else if (para is Album)
{
_pageFrame.Navigate(typeof(PlaylistView), para as Album);
return;
}
}
else if (entry.SourcePageType == typeof(LibraryView))
{
var para = entry.Parameter;
if (para != null)
{
item = TopNavigationItems.SingleOrDefault(t => t.Arguments == para);
}
else
{
item = TopNavigationItems[1];
}
}
if (item != null)
{
break; //if item is successfully got break the loop. We got what we needed.
}
}
}
if (item != null)
{
var container = (ListViewItem)GetParentListViewFromItem(item as SimpleNavMenuItem).ContainerFromItem(item);
if (container != null)
{
container.IsTabStop = false;
}
GetParentListViewFromItem(item as SimpleNavMenuItem).SetSelectedItem(container);
container.IsSelected = true;
if (container != null)
{
container.IsTabStop = true;
}
}
}
INavigationMenuItem GetItemFromList(Type sourcePagetype)
{
if (sourcePagetype == typeof(LibraryView))
{
return(TopNavigationItems.SingleOrDefault(p => p.DestinationPage == sourcePagetype));
}
else if (sourcePagetype == typeof(PlaylistView))
{
return(null);
}
else
{
return(BottomNavigationItems.SingleOrDefault(p => p.DestinationPage == sourcePagetype));
}
}