/// <summary>
/// Adds a new job to the tracker.
/// </summary>
/// <param name="ticket">The <see cref="IJobTicket"/> to begin
/// tracking.</param>
/// <param name="handler">The <see cref="IJobResultsHandler"/> called
/// when the job has finished executing.</param>
public void Add(IJobTicket ticket, IJobResultsHandler handler)
{
JobViewModel vm = new JobViewModel(ticket);
vm.Handler = handler;
switch (ticket.State)
{
case JobState.InQueue:
vm.JobStarted += _jobStarted;
vm.JobFinished += _jobFinished;
_safeViewModelAction(Pending.Add, vm);
break;
case JobState.Running:
vm.JobStarted += _jobStarted;
vm.JobFinished += _jobFinished;
Current = vm;
break;
default:
_safeViewModelAction(Finished.Add, vm);
break;
}
}
/// <summary>
/// Occurs when a contained JobViewModel has finished
/// </summary>
/// <param name="sender">The JobViewModel</param>
/// <param name="e">N/A</param>
private void _jobFinished(object sender, EventArgs e)
{
Current = null;
_safeViewModelAction(x => Pending.Remove(x), (JobViewModel)sender);
_safeViewModelAction(Finished.Add, (JobViewModel)sender);
}
/// <summary>
/// Performs an action with a view model on the UI thread
/// </summary>
/// <param name="action">The action to perform</param>
/// <param name="item">The view model to perform the action with</param>
private void _safeViewModelAction(Action <JobViewModel> action, JobViewModel item)
{
SendOrPostCallback c = x => action(item);
_context.Context.Send(c, null);
}
/// <summary>
/// Occurs when a contained JobViewModel has begun
/// </summary>
/// <param name="sender">The JobViewModel</param>
/// <param name="e">N/A</param>
private void _jobStarted(object sender, EventArgs e)
{
Current = (JobViewModel)sender;
_safeViewModelAction(x => Pending.Remove(x), Current);
}
