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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Threading;
using Tango.Logging;
namespace Tango.Core.Helpers
{
/// <summary>
/// Contains several UI threading helper methods.
/// </summary>
public static class ThreadsHelper
{
private static Dispatcher _dispatcher; //Holds the current dispatcher.
public static event Action<Dispatcher> DispatcherSet;
private static List<Action> _whenAvailableActions;
private static bool _whenAvailableActionsInvoked;
private static bool _hasDispatcher;
static ThreadsHelper()
{
_whenAvailableActions = new List<Action>();
}
/// <summary>
/// Sets the current dispatcher.
/// </summary>
/// <param name="dispatcher">The dispatcher.</param>
public static void SetDisptacher(Dispatcher dispatcher)
{
_dispatcher = dispatcher;
DispatcherSet?.Invoke(dispatcher);
_hasDispatcher = true;
if (!_whenAvailableActionsInvoked)
{
foreach (var action in _whenAvailableActions)
{
InvokeUI(action);
}
_whenAvailableActionsInvoked = true;
}
}
/// <summary>
/// Invokes the UI thread.
/// </summary>
/// <param name="action">The action.</param>
public static void InvokeUI(Action action)
{
if (_dispatcher == null)
{
LogManager.Default.Log(new NullReferenceException("The UI dispatcher was not set!"));
action();
}
else
{
_dispatcher.BeginInvoke(action);
}
}
/// <summary>
/// Invokes the UI thread while blocking the current thread.
/// </summary>
/// <param name="action">The action.</param>
public static void InvokeUINow(Action action)
{
if (_dispatcher == null)
{
LogManager.Default.Log(new NullReferenceException("The UI dispatcher was not set!"));
action();
}
else
{
_dispatcher.Invoke(action);
}
}
/// <summary>
/// Invokes UI thread after a dispatcher has been set by <see cref="SetDisptacher(Dispatcher)"/>.
/// </summary>
/// <param name="action">The action.</param>
public static void InvokeWhenAvailable(Action action)
{
if (_hasDispatcher)
{
InvokeUI(action);
}
else
{
_whenAvailableActions.Add(action);
}
}
/// <summary>
/// Starts a new STA thread which will be running the specified action.
/// </summary>
/// <param name="action">The action.</param>
public static void StartStaThread(Action action)
{
Thread thread = new Thread(() =>
{
action();
});
thread.SetApartmentState(ApartmentState.STA);
thread.IsBackground = true;
thread.Start();
}
}
}
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