private async Task LoadingDelayAsync(LoadingAsyncConfig config, int loadingCount)
{
if (loadingCount % 2 == 0)
{
Timer timer = null;
await Task.WhenAll(Task.Delay(TimeSpan.FromSeconds(5)), Task.Run(() =>
{
timer = new Timer((_) =>
{
if (config.Progress.HasValue)
{
config.Progress++;
}
else
{
config.Progress = 0;
}
}, null, 0, 40);
}));
timer.Dispose();
}
else
{
await Task.Delay(TimeSpan.FromSeconds(5));
}
}
public async void Loading()
{
var config = new LoadingAsyncConfig {
Title = "Loading Async", Message = "Hello World!"
};
await MessagingService.Instance.LoadingAsync(config, () => LoadingDelayAsync(config, _loadingCount++));
}
/// <summary>
/// Display a loading dialog asynchronously.
/// </summary>
/// <param name="config">The dialog configuration.</param>
/// <param name="task">A function to retrieve the task to execute.</param>
public virtual async Task LoadingAsync(LoadingAsyncConfig config, Func <Task> task, CancellationToken cancellationToken = default)
{
// If available, call the delegate to see if presenting this dialog is allowed.
if (MessagingServiceCore.Delegate != null && !MessagingServiceCore.Delegate.OnLoadingRequested(config))
{
return;
}
var dialog = PresentLoading(config);
// Register the disposable of the dialog with the cancellation token, then return the task.
using (cancellationToken.Register(() => dialog.Dispose()))
{
try
{
await task.Invoke().ConfigureAwait(false);
}
finally
{
dialog.Dispose();
}
}
}
/// <summary>
/// Display a loading dialog asynchronously.
/// </summary>
/// <param name="config">The dialog configuration.</param>
/// <param name="task">A function to retrieve the task to execute.</param>
public virtual async Task <T> LoadingAsync <T>(LoadingAsyncConfig config, Func <Task <T> > task, CancellationToken cancellationToken = default)
{
// If available, call the delegate to see if presenting this dialog is allowed.
if (MessagingServiceCore.Delegate != null && !MessagingServiceCore.Delegate.OnLoadingRequested(config))
{
return(default);
