protected override void OnNavigatedFrom(NavigationEventArgs e)
{
if (e.IsNavigationInitiator && e.NavigationMode == NavigationMode.Back)
{
Collection.LocomotivesIDs.CollectionChanged -= GroupItems_CollectionChanged;
Collection.AccessoriesIDs.CollectionChanged -= GroupItems_CollectionChanged;
Collection = null;
}
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
if (e.NavigationMode == NavigationMode.Back)
{
Collection.LocomotivesIDs.CollectionChanged -= CollectionItems_CollectionChanged;
Collection.AccessoriesIDs.CollectionChanged -= CollectionItems_CollectionChanged;
Collection = null;
}
}
private void ValidateCollection(UserItemsGroup collection)
{
// remove nonexisting ids:
var deletedItems = collection.LocomotivesIDs.Except(App.EcosModel.LocomotivesManager.Items.Select(item => item.ID)).ToList();
foreach (var id in deletedItems)
collection.LocomotivesIDs.Remove(id);
var deletedItems2 = collection.AccessoriesIDs.Except(App.EcosModel.AccessoriesManager.Items.Select(item => item.ID)).ToList();
foreach (var id in deletedItems2)
collection.AccessoriesIDs.Remove(id);
App.SaveProfiles();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
btnOperateAccessories.IsEnabled = btnCheckAccessories.IsEnabled = !App.IsTrial;
if (e.IsNavigationInitiator && e.NavigationMode == NavigationMode.New)
{
isNew = Collection == null;
if (isNew)
Collection = new UserItemsGroup();
Collection.LocomotivesIDs.CollectionChanged += GroupItems_CollectionChanged;
Collection.AccessoriesIDs.CollectionChanged += GroupItems_CollectionChanged;
ucCollectionLocomotivesList.IDs = Collection.LocomotivesIDs;
ucCollectionAccessoriesList.IDs = Collection.AccessoriesIDs;
PopulateItemsCheckLists();
SetUIVisibility();
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (e.NavigationMode == NavigationMode.New)
{
Collection = e.Parameter as UserItemsGroup;
isNew = Collection == null;
if (isNew)
Collection = new UserItemsGroup();
Collection.LocomotivesIDs.CollectionChanged += CollectionItems_CollectionChanged;
Collection.AccessoriesIDs.CollectionChanged += CollectionItems_CollectionChanged;
SetUIVisibility();
ValidateItems();
}
}
