make a custom Component Cancel-able

Replies to This Discussion

Permalink Reply by Florian Frank on June 7, 2013 at 3:47am

Hi Andy,

So you should definitely use a Background worker or Asynchrone/Parallel Threading(depends on what you're doing).

You can then use an eventhandler to check for esc key like this:

private void Form_KeyDown(object sender, KeyEventArgs e) {
   if (e.KeyCode == Keys.Escape)     {  

       bw.CancelAsync();

 }
}


If you're not using these Threading techniques Rhino & GH will freeze until your algorithm finishes calculating. The effort of Parallel Threading is, you can use multiple CPU's instead of just one (like GH).

Hope this gives you some ideas

FF

Permalink Reply by Riccardo La Magna on July 8, 2013 at 7:19am

Hi Andy,

you can have a look at a basic implementation of the BackgroundWorker here (see at the bottom). The code attached is implemented in a C# component, but you can easily use the same pattern within a compiled component. As Florian suggested you can make the worker cancellable by setting the property WorkerSupportsCancellation to true, like so:

worker.WorkerSupportsCancellation = true;

and then providing the proper event handler.

Cheers,

r

Permalink Reply by David Rutten on July 8, 2013 at 12:54pm

GH_Document.IsEscapeKeyDown()

this is a static method that you can call. If the method returns True, then abort your script and call GH_Document.RequestAbortSolution()

--

David Rutten

david@mcneel.com

Tirol, Austria