static void InitBackend(string type)
{
Toolkit.EnterUserCode();
if (type != null && LoadBackend(type))
{
return;
}
if (LoadBackend("Xwt.GtkBackend.GtkEngine, Xwt.Gtk, Version=1.0.0.0"))
{
return;
}
if (LoadBackend("Xwt.Mac.MacEngine, Xwt.Mac, Version=1.0.0.0"))
{
return;
}
if (LoadBackend("Xwt.WPFBackend.WPFEngine, Xwt.WPF, Version=1.0.0.0"))
{
return;
}
throw new InvalidOperationException("Xwt engine not found");
}
/// <summary>
/// Invokes an action in the GUI thread
/// </summary>
/// <param name='action'>
/// The action to execute.
/// </param>
public static void Invoke(Action action)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
engine.InvokeAsync(delegate {
try {
toolkit.EnterUserCode();
action();
toolkit.ExitUserCode(null);
} catch (Exception ex) {
toolkit.ExitUserCode(ex);
}
});
}
public void DispatchPendingEvents()
{
try {
toolkit.ExitUserCode(null);
toolkit.Backend.DispatchPendingEvents();
} finally {
toolkit.EnterUserCode();
}
}
public static void DispatchPendingEvents()
{
try {
Toolkit.ExitUserCode(null);
engine.DispatchPendingEvents();
} finally {
Toolkit.EnterUserCode();
}
}
public static void Initialize(Toolkit toolkit)
{
engine = toolkit.Backend;
mainLoop = new UILoop(toolkit);
UIThread = System.Threading.Thread.CurrentThread;
toolkit.EnterUserCode();
}
/// <summary>
/// Invokes an action in the GUI thread
/// </summary>
/// <param name='action'>
/// The action to execute.
/// </param>
public static void Invoke(Action action)
{
engine.Invoke(delegate {
try {
Toolkit.EnterUserCode();
action();
Toolkit.ExitUserCode(null);
} catch (Exception ex) {
Toolkit.ExitUserCode(ex);
}
});
}
public static void Initialize(Toolkit tk)
{
if (toolkit == null)
{
toolkit = tk;
}
engine = tk.Backend;
mainLoop = new UILoop(tk);
UIThread = System.Threading.Thread.CurrentThread;
tk.EnterUserCode();
}
public static void Initialize(string backendType)
{
if (engine != null)
{
return;
}
toolkit = Toolkit.Load(backendType, false);
toolkit.SetActive();
engine = toolkit.Backend;
mainLoop = new UILoop(toolkit);
UIThread = System.Threading.Thread.CurrentThread;
toolkit.EnterUserCode();
}
/// <summary>
/// Invokes an action in the GUI thread after the provided time span
/// </summary>
/// <returns>
/// A timer object
/// </returns>
/// <param name='action'>
/// The action to execute.
/// </param>
/// <remarks>
/// This method schedules the execution of the provided function. The function
/// must return 'true' if it has to be executed again after the time span, or 'false'
/// if the timer can be discarded.
/// The execution of the funciton can be canceled by disposing the returned object.
/// </remarks>
public static IDisposable TimeoutInvoke(TimeSpan timeSpan, Func <bool> action)
{
Timer t = new Timer();
t.Id = engine.TimeoutInvoke(delegate {
bool res = false;
try {
Toolkit.EnterUserCode();
res = action();
Toolkit.ExitUserCode(null);
} catch (Exception ex) {
Toolkit.ExitUserCode(ex);
}
return(res);
}, timeSpan);
return(t);
}
