[Ves] Passing data from VES to objective-C

[Pat Marion]

Hi Dan,

Are you using vesKiwiViewerApp or have to forked/renamed it to create your
own app class?  Either way, I'd add a new convenience method to your app
class (or vesKiwiViewerApp) that returns the representation:

vesKiwiBrainAtlasRepresentation* vesKiwiViewerApp::getBrainRepresentation();

Next, modify vesKiwiBrainAtlasRepresentation (or fork and rename it to be
your own class), so that rather than show a text label, it stores the 2D
screen coordinates and the model id and string.  Then add api to the
representation, something like:

// return whether or not a model was selected during the last double tap
event
bool modelWasSelected();

// return information about the model that was selected during the last
double tap event
int selectedModelId();
std::string selectedModelName();
vesVector2f selectedModelScreenCoordinates();


Then, in objective-c, after calling:

* *self->renderer.app->handleDoubleTap(currentLocation.x,
currentLocation.y);

You could do:

vesKiwiBrain
* *if (rep->modelWasSelected()) {

  NSString* modelName = [NSString
stringWithUTF8String:rep->selectedModelName().c_str()];
  ...

}

Hope this helps!

Pat


On Thu, Apr 19, 2012 at 11:13 AM, Aashish Chaudhary <
aashish.chaudhary at kitware.com> wrote:

> Hi Dan,
>
> On Thu, Apr 19, 2012 at 10:46 AM, Belsey, Daniel (UK)
> <Daniel.Belsey at baesystems.com> wrote:
> > Hi,
> >
> >
> >
> > I’m new to all of VES, VTK, objective-C and iOS dev – so apologies if
> any of
> > this is obvious!
>
>
> >
> > My initial task is to modify the brain atlas example included in
> Kiwiviewer,
> > so that when a part of the brain is double-tapped, instead of the part’s
> > name appearing as it does now, it instead appears in a message-box. The
> idea
> > being, further down the line we’ll be storing a web link instead of the
> > part’s name, and then hopefully get some content from the web link and
> > display this in the message box.
> >
> >
> >
> > We were originally going to do it with Android, but we don’t have a linux
> > machine available and had no joy getting it working on my windows machine
> > (and then found from this mailing list that Cygwin was unsupported too!)
> so
> > now there’s a Mac in the process of being set up and I’ve been asked to
> do
> > it for iOS instead.
> >
> >
> >
> > I’m having trouble wrapping my head around how to do this, however. I’ve
> got
> > a rough idea – presumably EAGLView.mm’s handleDoubleTapGesture method
> can be
> > modified to show a UIAlertView, but I don’t know quite how to get the
> data
> > from the app’s handleDoubleTap method.
> >
> >
> >
> > I’m assuming (and please correct me on this!) that
> > vesKiwiViewerApp::handleDoubleTap gets called first, and that then calls
> > BrainRepresentation::handleDoubleTap.
>
> If I recall this sounds correct.
>
> I’m not sure if this is true because I
> > don’t really understand the use of rep; but, if this is true, I’m
> guessing
> > it wouldn’t be too hard to change the return types to String in both
> cases
> > (and make sure the conditionals still make sense), but even if this is
> true,
> > I’m then not sure how to handle this on the object-C side of things.
> Would
> > it just be as simple as adding:
> >
> >
> >
> > NSString* name = self->renderer.app->handleDoubleTap(currentLocation.x,
> > currentLocation.y);
>
> I will let Pat give you more details on it but I would think that you
> can derive your own representation from
> vesKiwiBrainAtlasRepresentation and  then add a new  method that can
> give
> a string name of the model, call this method findModel(x,y) or something.
>
> HTH,
> Aashish
>
>
>
> >
>
>
> >
> >
> > Apologies for the vague email – I think I just need some direction!
> >
> >
> >
> > Many thanks in advance,
> >
> >
> >
> > Dan
> >
> >
> >
> >
> > ********************************************************************
> > This email and any attachments are confidential to the intended
> > recipient and may also be privileged. If you are not the intended
> > recipient please delete it from your system and notify the sender.
> > You should not copy it or use it for any purpose nor disclose or
> > distribute its contents to any other person.
> > ********************************************************************
> >
> >
> > _______________________________________________
> > Ves mailing list
> > Ves at public.kitware.com
> > http://public.kitware.com/cgi-bin/mailman/listinfo/ves
> >
>
>
>
> --
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com
> _______________________________________________
> Ves mailing list
> Ves at public.kitware.com
> http://public.kitware.com/cgi-bin/mailman/listinfo/ves
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/ves/attachments/20120419/d7dcbf89/attachment-0001.html>