private static Task <OAuthProvider> SelectProviderFromList()
{
_awaiter.Reset();
OAuthProvider provider = null;
var selectionViewModel = new ProviderSelectionViewModel(_providers);
selectionViewModel.ProviderSelected += (s, e) =>
{
provider = e.Provider;
_awaiter.Set();
};
Device.BeginInvokeOnMainThread(() =>
Application.Current.MainPage = new ProviderSelectionPage(selectionViewModel));
_awaiter.WaitOne();
_awaiter.Reset();
return(Task.FromResult(provider));
}
public ProviderSelectionPage(ProviderSelectionViewModel viewModel)
: base()
{
BindingContext = _viewModel = viewModel;
var grid = new Grid();
var label = new Label
{
Text = OAuthAuthenticator.ProviderSelectText,
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.Center
};
var fontSize = Device.GetNamedSize(NamedSize.Large, label);
grid.Children.Add(new Button
{
Text = OAuthAuthenticator.BackButtonText,
Command = viewModel.Cancel
});
grid.RowDefinitions.Add(new RowDefinition {
Height = GridLength.Auto
});
grid.RowDefinitions.Add(new RowDefinition {
Height = new GridLength(fontSize * 2)
});
grid.RowDefinitions.Add(new RowDefinition());
Grid.SetRow(label, 1);
label.FontSize = fontSize;
grid.Children.Add(label);
var providerStack = new StackLayout
{
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.Center,
Spacing = fontSize
};
foreach (var provider in viewModel.Providers)
{
var button = new ProviderButton
{
Command = BuildSelectionHandler()
};
button.SetBinding(ProviderButton.TextProperty, OAuthProvider.NameProperty, BindingMode.OneWay);
button.SetBinding(ProviderButton.ImageProperty, OAuthProvider.LogoProperty, BindingMode.OneWay);
providerStack.Children.Add(button);
button.BindingContext = provider;
}
var scrollView = new ScrollView
{
Content = providerStack
};
Grid.SetRow(scrollView, 2);
grid.Children.Add(scrollView);
Padding = fontSize;
Content = grid;
}