public Checkout()
{
InitializeComponent();
Loaded += (sender, args) => {
Amount.Focus();
Amount.SelectAll();
};
KeyDown += (sender, args) => {
if (args.Key == Key.Enter)
{
Model.OK();
}
};
DataContextChanged += (sender, args) => {
if (Model == null)
{
return;
}
Model.IsValid.Subscribe(x => {
if (x)
{
Change.ClearValue(Label.ForegroundProperty);
}
else
{
Change.Foreground = Brushes.Red;
}
});
};
}