/// <summary>
/// Ends the current help session (cannot be reversed)
/// </summary>
public void Abandon()
{
if (_help == null)
{
return;
}
if (HostControl.InvokeRequired)
{
HostControl.Invoke(new MethodInvoker(Abandon));
return;
}
ProgressProvider.Completed(this);
_help.Close();
_help = null;
}
public void ShowStage(HelpStage stage)
{
//Abandon must have already been called
if (_help == null)
{
return;
}
if (HostControl.InvokeRequired)
{
HostControl.Invoke(new MethodInvoker(() => ShowStage(stage)));
return;
}
CurrentStage = stage;
var helpBox = _help.ShowStage(this, CurrentStage);
helpBox.OptionTaken += () => ShowStage(CurrentStage.OptionDestination);
var t = stage.Await(_cancellationTokenSource.Token);
t.ContinueWith(r =>
{
if (r.IsFaulted || r.IsCanceled)
{
Abandon();
}
else
{
try
{
if (r.Result)
{
ShowNextStageOrClose();
}
}
catch (Exception)
{
Abandon();
}
}
});
}
public bool ShowNextStageOrClose()
{
//Abandon must have already been called
if (_help == null)
{
return(false);
}
if (HostControl.InvokeRequired)
{
return((bool)HostControl.Invoke(new Func <bool>(ShowNextStageOrClose)));
}
//if there is a next stage and help hasn't been closed
if (CurrentStage != null && CurrentStage.Next != null && !_helpClosed)
{
ShowStage(CurrentStage.Next);
return(true);
}
_help.Close();
return(false);
}
