public TodoItemsViewModel()
{
TodoList = new ObservableCollection <TodoItem>();
AddTodoCommand = new RelayCommand(() =>
{
TodoList.Add(new TodoItem($"Neues ToDo {TodoItem.LastID + 2}", "...", DateTime.Now + TimeSpan.FromDays(1)));
SelectedItem = TodoList[TodoList.Count - 1];
DeleteTodoCommand.OnCanExecuteChanged();
});
DeleteTodoCommand = new RelayCommand(() =>
{
TodoList.Remove(SelectedItem);
DeleteTodoCommand.OnCanExecuteChanged();
},
() => SelectedItem != null
);
NextTodoCommand = new RelayCommand(() =>
{
if (TodoList.IndexOf(SelectedItem) < TodoList.Count - 1)
{
SelectedItem = TodoList[TodoList.IndexOf(SelectedItem) + 1];
}
else
{
SelectedItem = TodoList[0];
}
});
PreviewTodoCommand = new RelayCommand(() =>
{
if (TodoList.IndexOf(SelectedItem) > 0)
{
SelectedItem = TodoList[TodoList.IndexOf(SelectedItem) - 1];
}
else
{
SelectedItem = TodoList.Last();
}
});
SaveTodosCommand = new RelayCommand(() =>
{
TodoStorageService.SaveTodos();
});
ToggleFavoriteCommand = new RelayCommand <object>(HandleNotifications);
Task.Factory.StartNew(async() =>
{
try
{
await TodoStorageService.LoadTodos();
await Task.Delay(500);
}
catch (Exception exp)
{
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
NoSelectionText = exp.Message;
LoadingComplete?.Invoke(this, EventArgs.Empty);
});
return;
}
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
this.TodoList = TodoItemManager.ItemList;
NoSelectionText = TodoList.Count > 0 ? "Wähle ein Todo aus oder erstelle ein Neues!" : "Erstelle dein erstes Todo!";
LoadingComplete?.Invoke(this, EventArgs.Empty);
});
});
}
