public MainViewModel()
{
Quotes = new ObservableCollection <QuoteViewModel>(QuoteManager.Load()
.Select(q => new QuoteViewModel(q)));
SelectedQuote = Quotes.FirstOrDefault();
}
public MainViewModel()
{
Quotes = new ObservableCollection <QuoteViewModel>(QuoteManager.Load()
.Select(q => new QuoteViewModel(q)));
SelectedQuote = Quotes.FirstOrDefault();
AddQuote = new Command(async() => await OnAddQuote());
DeleteQuote = new Command <QuoteViewModel>(async vm => await OnDeleteQuote(vm));
EditQuote = new Command <QuoteViewModel>(async vm => await OnEditQuote(vm));
ShowQuoteDetail = new Command <QuoteViewModel>(async vm => await OnShowQuoteDetails(vm));
}
public async Task OnAddQuote()
{
var newQuote = new QuoteViewModel();
Quotes.Add(newQuote);
SelectedQuote = newQuote;
if (!DependencyService.Get <INavigationService>().CanGoBack)
{
await DependencyService.Get <INavigationService>()
.NavigateAsync(AppPages.Edit, newQuote);
}
}
private async Task OnAddQuote()
{
var newQuote = new QuoteViewModel();
Quotes.Add(newQuote);
SelectedQuote = newQuote;
if (!serviceLocator.Get <INavigationService>().CanGoBack)
{
await serviceLocator.Get <INavigationService>()
.NavigateAsync(AppPages.Edit, newQuote);
}
}
public async Task OnDeleteQuote(QuoteViewModel quote)
{
bool result = await DependencyService.Get <IMessageVisualizerService>()
.ShowMessage("Are you sure?",
"Are you sure you want to delete this quote from " + quote.Author + "?",
"Yes", "No");
if (result == true)
{
int pos = Quotes.IndexOf(quote);
Quotes.Remove(quote);
if (SelectedQuote == quote)
{
if (pos > Quotes.Count - 1)
{
pos = Quotes.Count - 1;
}
SelectedQuote = Quotes[pos];
}
}
}
public async Task OnShowQuoteDetails(QuoteViewModel quote)
{
SelectedQuote = quote;
await DependencyService.Get <INavigationService>().NavigateAsync(AppPages.Detail, quote);
}
public async Task OnEditQuote(QuoteViewModel quote)
{
SelectedQuote = quote;
await DependencyService.Get <INavigationService>()
.NavigateAsync(AppPages.Edit, quote);
}
private async Task OnEditQuote(QuoteViewModel quote)
{
SelectedQuote = quote;
await serviceLocator.Get <INavigationService>()
.NavigateAsync(AppPages.Edit, quote);
}
private async Task OnShowQuoteDetails(QuoteViewModel qvm)
{
SelectedQuote = qvm;
await serviceLocator.Get <INavigationService>()
.NavigateAsync(AppPages.Detail);
}