public static async Task <T> WaitValueChangedAsync <T>(this NotificationValue <T> value, CancellationToken cancel)
{
var cts = new TaskCompletionSource <T>();
void ValuePropertyChanged(object?sender, PropertyChangedEventArgs e)
{
if (e.PropertyName != nameof(IValueHolder <T> .Value))
{
return;
}
value.PropertyChanged -= ValuePropertyChanged;
cts.SetResult(value.Value);
}
await using var registration = cancel.Register(() =>
{
value.PropertyChanged -= ValuePropertyChanged;
// ReSharper disable once MethodSupportsCancellation
cts.SetCanceled();
});
value.PropertyChanged += ValuePropertyChanged;
var ret = await cts.Task.ConfigureAwait(false);
return(ret);
}
public static Task <T> WaitValueChangedAsync <T>(this NotificationValue <T> value)
{
var cts = new TaskCompletionSource <T>();
void ValuePropertyChanged(object?sender, PropertyChangedEventArgs e)
{
if (e.PropertyName != nameof(IValueHolder <T> .Value))
{
return;
}
value.PropertyChanged -= ValuePropertyChanged;
cts.SetResult(value.Value);
}
value.PropertyChanged += ValuePropertyChanged;
return(cts.Task);
}