public static IObservable<T> ObserveOn<T>(this IObservable<T> source, IMvxMainThreadDispatcher dispatcher)
{
Contract.Requires(source != null);
Contract.Requires(dispatcher != null);
return Observable.Create<T>(observer => source.Subscribe(
value => dispatcher.RequestMainThreadAction(() => observer.OnNext(value)),
ex => dispatcher.RequestMainThreadAction(() => observer.OnError(ex)),
() => dispatcher.RequestMainThreadAction(observer.OnCompleted)));
}
/// <summary>
/// Setup the execution of the task with a progress indicator
/// </summary>
/// <typeparam name="T">Type of task return value</typeparam>
/// <param name="task">Task that is executing</param>
/// <param name="onCompletion">Action that will be executed when the task is complete</param>
/// <param name="startProgressAction">Action that will show the progress indicator</param>
/// <param name="stopProgressAction">Action that will hide the progress indicator</param>
public void SetupTask <T>(Task <T> task, Action <Task <T> > onCompletion, Action startProgressAction, Action stopProgressAction)
{
_progressIndicatorCount++;
_dispatcher.RequestMainThreadAction(startProgressAction);
task.ContinueWith(x =>
{
onCompletion(task);
if (--_progressIndicatorCount == 0)
{
_dispatcher.RequestMainThreadAction(stopProgressAction);
}
});
}
public Task ShowAsync(string title, string message, string ok = Text.Ok)
{
var tcs = new TaskCompletionSource <bool>();
dispathcher.RequestMainThreadAction(() =>
{
var rootController = UIApplication.SharedApplication.KeyWindow.RootViewController;
if (rootController == null)
{
tcs.TrySetResult(false);
return;
}
UIAlertController alert = UIAlertController.Create(title, message, UIAlertControllerStyle.Alert);
var okAction = UIAlertAction.Create(ok, UIAlertActionStyle.Default, act => tcs.TrySetResult(true));
alert.AddAction(okAction);
rootController.PresentViewController(alert, true, null);
});
return(tcs.Task);
}
/// <summary>
/// Displaies a dialog with buttons
/// </summary>
/// <param name="message">Message that will be displayed</param>
/// <param name="title">Title of the dialog box</param>
/// <param name="buttonBuilder">Button builder.</param>
private void DisplayDialogWithButtons(string message, string title, Action <AlertDialog.Builder> buttonBuilder)
{
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(_topActivity.Activity);
alertDialogBuilder.SetMessage(message);
if (title != null)
{
alertDialogBuilder.SetTitle(title);
}
buttonBuilder(alertDialogBuilder);
AlertDialog alertDialog = alertDialogBuilder.Create();
_dispatcher.RequestMainThreadAction(() => alertDialog.Show());
}
private async Task DoGetAllWifiInfoCommand(CancellationToken token = default(CancellationToken))
{
IsScanning = true;
try
{
var allInfo = await _wifi.GetAllWifiInfoAsync(token).ConfigureAwait(false);
_dispatcher.RequestMainThreadAction(() =>
{
WifiInfo.Clear();
WifiInfo.AddRange(allInfo.Select(info => new WifiInfoViewModel(info)));
});
}
catch (Exception e)
{
Mvx.TaggedError("WifiViewModel", $"Failed getting All Wifi Info: {e}");
}
finally
{
IsScanning = false;
}
}
private void StartObservingMessages()
{
RealtimeService.ObserveMessages((message, key) =>
{
_dispatcher.RequestMainThreadAction(() =>
{
ChatMessageViewModel existingMessage = Messages.FirstOrDefault(m => m.Key == key);
if (existingMessage == null)
{
Debug.WriteLine(key);
Messages.Add(new ChatMessageViewModel()
{
Key = key,
Content = message.Content,
UserName = message.UserName
});
}
else
{
existingMessage.IsBusy = false;
}
});
});
}
/// <summary>
/// Shows a message box with the specified message
/// </summary>
/// <param name="message">Message that should be displayed</param>
/// <param name="title">Title of the message box</param>
public void Alert(string message, string title)
{
_dispatcher.RequestMainThreadAction(() => MessageBox.Show(message, title ?? string.Empty, MessageBoxButton.OK));
}
/// <summary>
/// Shows a message box with the specified message
/// </summary>
/// <param name="message">Message that should be displayed</param>
/// <param name="title">Title of the message box</param>
public void Alert(string message, string title)
{
var alert = new UIAlertView(title ?? string.Empty, message, null, "Ok", null);
_dispatcher.RequestMainThreadAction(() => alert.Show());
}