[vtkusers] How to delete an interactorstyle in runtime?

[Clinton Stimpson]

On Mar 5, 2010, at 7:53 AM, sercani wrote:

> Hi David;
> This is the declaration of cis:
> CustomInteractorStyle *cis=CustomInteractorStyle::New();
> 
> and this is the definiton of CustomInteractorStyle class:
> 
> class CustomInteractorStyle : public QObject, public vtkInteractorStyleImage
> {
> };
>  this class contains virtual mouse functions of vtkInteractorStyleImage and handles these events according to my software's tools...When another tool selected, it'is own custom style is set to interactor's style and handles events too...When i set the interactor style in runtime like this:
> 
> vtkImageViewer2 viewer;
> viewer->GetRenderWindow()->GetInteractor()->SetInteractorStyle(cis);
>  it throws an 
> "Unhandled exception at 0x60772abb (vtkRendering.dll) in VTKTry.exe: 0xC0000005: Access violation reading location 0x00000050.
> The program '[2568] VTKTry.exe: Native' has exited with code -1073741819 (0xc0000005)."
> 
> If i don't set the interactor's interactorstyle,but set the interactorstyle's interactor like this:
> cis->SetInteractor(viewer->GetRenderWindow()->GetInteractor());  QVTKWidget and my vtkImageViewer2 handles the mousewheel event seperately and this cause wrong behaviour in my program...
>  I am setting the viewer's and QVTKWidget's interactor like this:
> 
>     vtkImageViewer2 viewer=vtkImageViewer2::New();
>     qvtk->SetRenderWindow(viewer->GetRenderWindow());    
>     vtkRenderWindowInteractor *interactor=vtkRenderWindowInteractor::New();
>     viewer->GetRenderWindow()->SetInteractor(interactor);
>     qvtk->GetRenderWindow()->SetInteractor(viewer->GetRenderWindow()->GetInteractor());
> 
> How can i solve these problems?


vtkRenderWindowInteractor::New() gives you one that is incompatible with QVTKWidget.
Use a QVTKInteractor instead.

Clint

> 
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> 
> 
> 
> 
> 
> 05.03.2010 16:18, David Doria yazmış:
>> 
>> On Fri, Mar 5, 2010 at 9:04 AM, sercani <sercanimailgroups at gmail.com> wrote:
>> Hi everyone,
>> I've written subclass of vtkInteractorStyleImage and set it to an interactor, but i need to set another custom interactorstyle in runtime. When i want to delete the current custom interactor style like this:
>> if(cis->GetEnabled())
>>    {
>>        cis->EnabledOff();
>>        cis->SetInteractor(0);
>>        cis->Delete();
>>    }
>> 
>> it throws :
>> 
>> "ERROR: In ..\..\VTK_Source\VTK\Common\vtkObject.cxx, line 160
>> vtkObject (0155E128): Trying to delete object with non-zero reference count."
>> 
>> How can i delete this custom interactorstyle and set another custom interactorstyle as current interactor's new interactorstyle?
>> 
>> 
>> Is cis a smart pointer? If so then you should let it delete itself instead of deleting it manually - or if you want to delete it manually then don't use a smart pointer. Can you send us some more code for context?
>> 
>> Thanks,
>> 
>> David
> 
> 
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