public TodoItemViewModel (TodoItem todoItem)
{
todo = todoItem;
saveCommand = new Command (Save);
deleteCommand = new Command (Delete);
cancelCommand = new Command (() => Navigation.Pop());
speakCommand = new Command (Speak);
}
public int SaveItem (TodoItem item)
{
lock (locker) {
if (item.ID != 0) {
database.Update(item);
return item.ID;
} else {
return database.Insert(item);
}
}
}
public TodoListViewModel ()
{
// HACK: don't need these any more, I packaged a pre-populated SQLite database file
// App.Database.SaveItem (new TodoItem{ Name = "Buy apples", Notes = "Macintosh" });
// App.Database.SaveItem (new TodoItem{ Name = "Buy pears", Notes = "" });
// App.Database.SaveItem (new TodoItem{ Name = "Buy milk", Notes = "Soy" });
// App.Database.SaveItem (new TodoItem{ Name = "Buy bananas", Notes = "" });
// App.Database.SaveItem (new TodoItem{ Name = "Buy kiwi", Notes = "" });
// App.Database.SaveItem (new TodoItem{ Name = "Buy oranges", Notes = "" });
var all = App.Database.GetItems ().ToList();
foreach (var t in all) {
contents.Add (new TodoItemCellViewModel (t));
}
MessagingCenter.Subscribe<TodoItemViewModel, TodoItem> (this, "TodoSaved", (sender, model) => {
App.Database.SaveItem(model);
Reload();
});
MessagingCenter.Subscribe<TodoItemViewModel, TodoItem> (this, "TodoDeleted", (sender, model) => {
App.Database.DeleteItem(model.ID);
Reload();
});
MessagingCenter.Subscribe<TodoItemViewModel, TodoItem> (this, "TodoSpeak", (sender, model) => {
Xamarin.Forms.DependencyService.Get<ITextToSpeech>().Speak(model.Name + " " + model.Notes);
});
MessagingCenter.Subscribe<TodoListPage, TodoItem> (this, "TodoAdd", (sender, viewModel) => {
var todo = new TodoItem();
var todovm = new TodoItemViewModel(todo);
Navigation.Push (ViewFactory.CreatePage (todovm));
});
MessagingCenter.Subscribe<TodoListPage> (this, "TodoListSpeak", (sender) => {
var todos = App.Database.GetItemsNotDone();
var tospeak = "";
foreach (var t in todos)
tospeak += t.Name + " ";
if (tospeak == "") tospeak = "there are no tasks to do";
Xamarin.Forms.DependencyService.Get<ITextToSpeech>().Speak(tospeak);
//App.Speech.Speak(tospeak);
});
}
public TodoListPage ()
{
Title = "TodoMvvm";
NavigationPage.SetHasNavigationBar (this, true);
var listView = new ListView ();
listView.RowHeight = 40;
listView.SetBinding (ListView.ItemsSourceProperty, "Contents");
listView.SetBinding (ListView.SelectedItemProperty, new Binding ("SelectedItem", BindingMode.TwoWay));
listView.ItemTemplate = new DataTemplate (typeof (TodoItemCell));
Content = new StackLayout {
VerticalOptions = LayoutOptions.FillAndExpand,
Children = {listView}
};
var tbi = new ToolbarItem ("+", null, () => {
var t = new TodoItem();
MessagingCenter.Send (this, "TodoAdd", t);
}, 0, 0);
if (Device.OS == TargetPlatform.Android) { // BUG: Android doesn't support the icon being null
tbi = new ToolbarItem ("+", "plus", () => {
var t = new TodoItem();
MessagingCenter.Send (this, "TodoAdd", t);
}, 0, 0);
}
ToolbarItems.Add (tbi);
if (Device.OS == TargetPlatform.iOS) {
var tbi2 = new ToolbarItem ("?", null, () => {
MessagingCenter.Send (this, "TodoListSpeak");
}, 0, 0);
ToolbarItems.Add (tbi2);
}
}
public TodoItemCellViewModel (TodoItem todoItem)
{
todo = todoItem;
}