RhinoDoc change notifications

Replies to This Discussion

Permalink Reply by Florian Frank on January 21, 2013 at 9:10am

Yes there is...the event you're searching for is called "EndOpenDocument".

All events you should take a look at, are in RhinoCommon Class RhinoDoc.

Best regards FF

Permalink Reply by Francisco Garcia Collado on January 21, 2013 at 9:59am

Thanks Florian, but... how can I notify these changes to GH_Param?

Permalink Reply by David Rutten on January 21, 2013 at 10:30am

When you detect an event in Rhino that you want to respond to. You can expire your parameters and trigger a new solution. Basically call ExpireSolution(false) on every affected parameter and when you're done call NewSolution(false) on the GH_Document.

If it's likely that a single event will be followed by further events, then you may want to create a timer that delays your expiration/recalculation calls for a few milliseconds to see if there's any other events happening.

There is already a mechanism for this sort of thing in Grasshopper as Points, Curves, Surfaces, Meshes, Boxes and Breps all respond to changes. Is it not possible to make your own data use this mechanism? Or are you not dealing with custom IGH_Goo here at all?

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Francisco Garcia Collado on January 22, 2013 at 1:01am

Thank you very much for your answers and excuse my lack of experience in programming with Grasshopper ;)

But... How I can capture RhinoDoc events in Grasshopper?
In my project, all classes derived from GH_Param, GH_Component and IGH_GeotricGoo.

Should I create a high-level class that controls the document?

Permalink Reply by David Rutten on January 22, 2013 at 2:18am

Sorry, it seems I was confused. Are you only looking to respond to document swaps or also to changes to document objects. I assume you're referencing objects or data from the 3dm file that people can change right? So do you also want to respond to those kind of changes?

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Francisco Garcia Collado on January 22, 2013 at 2:33am

That is, David.

The .3dm document includes high level objects (non-geometric) that I have encapsulated in GH components derived from GH_Param. I need to detect when the .3dm changes to recalculate these parameters.

Permalink Reply by David Rutten on January 22, 2013 at 3:59am

Ok, then Florian's answer is what you need.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Florian Frank on January 22, 2013 at 1:18am

Hi Francisco,

Bind the event where you need to (e.g. on placing the component on the canvas)...like this:

RhinoDoc.EndOpenDocument += new EventHandler(myEventHandler);

When the component has been removed from the canvas...unbind the event:

RhinoDoc.EndOpenDocument -= new EventHandler(myEventHandler);

This is your EventHandler

private void myEventHandler(object sender, Rhino.DocumentOpenEventArgs args){
    //Do your stuff
  }

hope this helps

Cheers FF

Permalink Reply by Francisco Garcia Collado on January 23, 2013 at 1:39am

Ok!, that's work perfectly

Thank's a million!