Find shape in view - Forum Open Cascade Technology

mohammad abbasi
Sun, 10/14/2018 - 12:47

Forums:

I'm newbie in OCCT

i have view and create some shape in it that listed in treeview .i want when i clicked on treeview item, color of the related shape changes.

please help

Benjamin Bihler
Mon, 10/15/2018 - 10:29

Hi Mohammad,

you can get the highlighted object like this

Handle(AIS_InteractiveObject) newHighlightedObject;

   if (interactiveContext->HasDetected())
   {
       newHighlightedObject = interactiveContext->DetectedInteractive();
   }

or the selected object like this

if (0 != interactiveContext->NbSelected())
   {
       for (interactiveContext->InitSelected(); interactiveContext->MoreSelected();
               interactiveContext->NextSelected())
       {
           const Handle(AIS_InteractiveObject) object =
                   interactiveContext->SelectedInteractive();

           ...
       }
   }

Then you might want to check the owner of the selected object like this:

            if (object->HasOwner())
           {
               const Handle(Standard_Transient)& owner = object->GetOwner();

               if (owner.IsNull())
               {
                   // Do nothing! This is a temporary visualization element.
               }
               else if (owner->IsKind(STANDARD_TYPE(TPrsStd_AISPresentation)))
               {
                   Handle(TPrsStd_AISPresentation) presentation =
                           Handle(TPrsStd_AISPresentation)::DownCast(owner);

                    // Modify the presentation...
                   ...
               }
           }

But it might depend on your document handling what the owner is and what you want to do with it. I hope that this gives you an idea. The rest I guess you would have to find out by trying...

Benjamin