[vtkusers] Subclassing vtkInteractorStyle in FourPainView Example

[Alex Malyushytskyy]

It might be time to attach compilable code.

Alex


On Mon, Sep 9, 2013 at 4:53 PM, Panayiotis Georgiou
<ps.georgiou at gmail.com>wrote:

> Thanks for your reply Alex.
>
> I have tried what you have suggested but it sill doesn't work. I believe
> the problem is on how I apply the new style on the three views. As I have
> noted in my original post, when I apply the customised style on the 4th
> view it works. The way I did that for the 4th view is:
>
> vtkSmartPointer< vtkRenderer > ren = vtkSmartPointer< vtkRenderer
> >::New();
>
>  this->ui->view4->GetRenderWindow()->AddRenderer(ren);
> vtkRenderWindowInteractor *iren = this->ui->view4->GetInteractor();
>  iren->SetInteractorStyle(style);
> style->SetCurrentRenderer(ren);
>
> Any other suggestions?
>
> Thanks.
>
>
> On Mon, Sep 9, 2013 at 9:25 PM, Alex Malyushytskyy <alexmalvtk at gmail.com>wrote:
>
>> Override  vtkInteractorStyle::OnChar ( )
>>
>> Make it do nothing.
>>
>> Alex
>>
>>
>>
>> On Mon, Sep 9, 2013 at 9:37 AM, Panayiotis Georgiou <
>> ps.georgiou at gmail.com> wrote:
>>
>>> Dear vtk users,
>>>
>>> I am trying to customize the FourPaneViewer example from the provided
>>> VTK examples. The full code of the example can be found in
>>> VTK_DIR/Examples/GUI/Qt/FourPaneViewer.
>>>
>>> The example embeds in Qt 4 QVTKWidget views and performs reslicing. One
>>> of the views renders (3) vtkImagePlaneWidgets and each of the other 3 views
>>> renders a vtkResliceImageViewer.
>>>
>>> What I am trying to achieve is disable in the 3 vtkResliceImageViewers
>>> any events triggered by pressing keys on the keyboard, i.e. I want to
>>> restrict the user and allow him to interact with these widgets using only
>>> the mouse.
>>>
>>> The way I have tried to do this is by subclassing the vtkInteractorStyle
>>> class as follows:
>>>
>>>     // Define interaction style
>>>     class KeyPressInteractorStyle : public vtkInteractorStyle
>>>     {
>>>     public:
>>>     static KeyPressInteractorStyle* New();
>>>     vtkTypeMacro(KeyPressInteractorStyle, vtkInteractorStyle);
>>>
>>>     virtual void OnKeyPress()
>>>     {
>>>     // Get the keypress
>>>     vtkRenderWindowInteractor *rwi = this->Interactor;
>>>     std::string key = rwi->GetKeySym();
>>>
>>>     // Output the key that was pressed
>>>     std::cout << "Pressed " << key << std::endl;
>>>     qDebug()<< "Pressed " << rwi->GetKeySym();
>>>
>>>     // Forward events
>>>     vtkInteractorStyle::OnKeyPress();
>>>     }
>>>
>>>     };
>>>     vtkStandardNewMacro(KeyPressInteractorStyle);
>>>
>>> and then for each of the 3 views, the customised interaction style is
>>> applied as follows:
>>>
>>>         vtkSmartPointer<KeyPressInteractorStyle> style =
>>>     vtkSmartPointer<KeyPressInteractorStyle>::New();
>>>
>>>
>>> this->ui->view1->GetRenderWindow()->GetInteractor()->SetInteractorStyle(style);
>>>         style->SetCurrentRenderer(riw[0]->GetRenderer());
>>>
>>>         this->ui->view1->SetRenderWindow(riw[0]->GetRenderWindow());
>>>
>>> riw[0]->SetupInteractor(this->ui->view1->GetRenderWindow()->GetInteractor());
>>>
>>> where view1 is of type QVTKWidget  and riw[i] of type
>>> vtkResliceImageViewer.
>>>
>>> Unfortunately the approach I am using has no effect. The keyboard events
>>> are not captured at all by the interaction style. Nothing is printed in the
>>> console. It should be noted that if I apply the customised style on the 4th
>>> view for vtkImagePlaneWidgets, then it works.
>>>
>>> Can someone help me to fix this? I am new to VTK and any help will be
>>> much appreciated.
>>>
>>> Thanks for your help,
>>>
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>>
>
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