/// <summary>
/// Update all grouping options. This method is intended to be called only from parent view.
/// </summary>
/// <param name="stateManager">The new state manager for the hosted page.</param>
public void ReloadGroupingOptions(IPageGroupingStateManager stateManager)
{
IsNavigationOpsAvailable = false;
_stateManager = stateManager;
SortingOptions.Clear();
// Reload options
var options = _stateManager.PopulateAvailablePairs();
foreach (var option in options)
{
SortingOptions.Add(option);
}
// Set default option
// We don't need to set it - it is already passed to view
var lastUsedOption = _stateManager.GetLastUsedPair();
var elem = SortingOptions.Where(i => i.Identifier == lastUsedOption.Identifier).ToList();
if (elem.Any())
{
SelectedItemIndex = SortingOptions.IndexOf(elem.FirstOrDefault());
}
// Enable selection
IsNavigationOpsAvailable = true;
}
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
_cts = new CancellationTokenSource();
if (ViewModel == null)
{
var type = (CommonItemType)e.Parameter;
ContentGridView.ItemTemplate = (DataTemplate)Resources[ResourceName[type]];
if (type == CommonItemType.Song)
{
var collection = Resources["AlternatingColorBehavior"] as BehaviorCollection;
collection.Attach(ContentGridView);
_groupState = new PageGroupingStateManager <CommonGroupedListView>(type);
}
else
{
_groupState = new PageGroupingStateManager <CommonGroupedGridView>(type);
}
// Reload options
SortingOptions.Clear();
var options = _groupState.PopulateAvailablePairs();
foreach (var option in options)
{
SortingOptions.Add(option);
}
var lastUsedOption = _groupState.GetLastUsedPair();
var elem = SortingOptions.Where(i => i.Identifier == lastUsedOption.Identifier).ToList();
if (elem.Any())
{
SortingMethod = SortingOptions.IndexOf(elem.FirstOrDefault());
}
DataContext = new LibraryViewModel(new DataObjects.GroupedViewNavigationArgs(type, lastUsedOption));
GroupedCvs.Source = ViewModel.GroupedItems.Items;
GroupedCvs.IsSourceGrouped = true;
await ViewModel.LoadDataAsync(_cts.Token);
}
Messenger.Default.Register <MessageBase>(this, CommonSharedStrings.IndexFinishedMessageToken, OnIndexFinished);
if (_previousAnimatedControl != null)
{
var imageAnimation = ConnectedAnimationService.GetForCurrentView().GetAnimation("image");
imageAnimation?.TryStart(_previousAnimatedControl);
_previousAnimatedControl = null;
}
}