Thank you very much for your reply. I finally did it creating a custom
style for the vtk render window interactor. I found it easier.
I explain how in case somebody finds it useful:
By default the vtkRenderWindowInteractor has as style Joystick camera
<https://www.vtk.org/doc/nightly/html/classvtkInteractorStyle.html#details>.
You can create a new style where you define what you want to do with mouse
click events.
1) In your app's code get the interactor of your render Window:
m_renderWindowInteractor = vtkRenderWindowInteractor::New();
m_renderWindowInteractor = ui->myQmitkRenderWindow->GetVtkRenderWindow()->
GetInteractor();
2)Change the default interactor style to a customized one:
vtkSmartPointer<customMouseInteractorStyle> style = vtkSmartPointer<
customMouseInteractorStyle>::New();
m_renderWindowInteractor->SetInteractorStyle(style);
Where customMouseInteractorStyle is a new class in which you define what
you want to do with the mouse events. I took the example of this class here
<https://www.vtk.org/Wiki/VTK/Examples/Cxx/Interaction/MouseEvents>. And to
convert screen 2D coordinates into 3D world coordinates y used this
<https://www.vtk.org/Wiki/VTK/Examples/Boneyard/Cxx/Interaction/ClickWorldCoordinates>
.
I hope it helps!
Best regards,
Rocío
2018-02-20 13:36 GMT+01:00 Dinkelacker, Stefan <
s.dinkelac...@dkfz-heidelberg.de>:
> Hm, personally I didn’t touch the interaction for a long time, but four
> years ago I wrote an interactor that calculated the pick ray in the 3d
> renderwindow based on the mouse coordinates [1]. The simulation module was
> deleted meanwhile, but it is present in v2016.03.0. Even though it is a
> relatively complicated module, I’m sure you can get an idea of how to write
> an interactor for 3d interaction. I didn’t check but there is also a Gizmo
> module in MITK that basically consists of a 3d control element to modify
> objects in the 3d window, that could be a good and more recent starting
> point as well. I never used interactors outside of the MITK Workbench so I
> cannot say anything about possible quirks in completely custom applications.
>
>
>
> [1] https://github.com/MITK/MITK/blob/v2016.03.0/Modules/Simulation/
> mitkSimulationInteractor.cpp#L197-L233
>
>
>
> *From:* LOPEZ VELAZCO, ROCIO [mailto:rocio.lo...@upf.edu]
> *Sent:* Dienstag, 20. Februar 2018 11:03
> *To:* Dinkelacker, Stefan
> *Cc:* mitk-users@lists.sourceforge.net
> *Subject:* Re: [mitk-users] vtkRenderWindowInteractor and
> LeftButtonPressEvent
>
>
>
> Hello Stefan,
>
> Thank you very much for your fast reply. I went deeper yesterday and now I
> have more information about all this.
>
>
>
> - I am developing a MITK based application in which there are only two
> independent QmitkRenderWindow.
>
>
>
> - What I tried some days ago was to create a new interactor modifying
> Display Interactor copy (config.xml and interactor.xml), but I found that
> it was only for 2D axial, sagital and coronal views, however what I want to
> interact is the 3D QmitkRenderWindow. In MITK Mailing list
> <https://sourceforge.net/p/mitk/mailman/message/33298655/> I found
> something about it: "In 2D we handle the Display interaction with the
> DisplayInterator, in 3D the DisplayInteractor should (but currently
> doesn't) return false, and VTK takes the place to handle the events." So,
> looking at the documentation of QmitkRenderWindow
> <http://docs.mitk.org/nightly/classQmitkRenderWindow.html>, I found the
> public function GetVtkRenderWindowInteractor
> <http://docs.mitk.org/nightly/classQmitkRenderWindow.html#a28411f023543ee4ec9484bc8d5e654d4>
> () which returns vtkRenderWindowInteractor object. I thought about changing
> the style of the vtk iteractor so that disable the "joystick camera" by
> default in 3D render to a customized one... Do you think this would work?
> or is there a way to interact with the 3D Render Window using MITK
> Interactions?
>
> Looking at the MITK source code I found that for QmitkRenderWindow you
> don't use MITK interactors, don't you? maybe I missunderstood.
>
>
>
> Thank you very much for the help!
>
>
>
> Best regards,
>
>
>
> Rocío
>
>
>
> 2018-02-20 2:46 GMT+01:00 Dinkelacker, Stefan <s.dinkelacker@dkfz-
> heidelberg.de>:
>
> Hi,
>
>
>
> I highly recommend to use the MITK interaction instead [1]. All the
> interaction in the MITK Workbench is done like this and it blends in well
> with all the other interactions in the application. You can easily access
> the mouse position through mitk::InteractionPositionEvent. Find some
> examples in the MITK source code. Look for the "resource/Interactions" and
> "src/Interactions" directories of modules, i. e. the BoundingShape module
> contains all the interaction for the Image Cropper plugin, in which you can
> modify and move a box in the render windows. There should be much smaller
> examples in the MITK source code as well.
>
>
>
> Best,
>
> Stefan
>
>
>
> [1] http://docs.mitk.org/2016.11/DataInteractionPage.html
> ------------------------------
>
> *Von:* LOPEZ VELAZCO, ROCIO <rocio.lo...@upf.edu>
> *Gesendet:* Montag, 19. Februar 2018 13:00
> *An:* mitk-users@lists.sourceforge.net
> *Betreff:* [mitk-users] vtkRenderWindowInteractor and LeftButtonPressEvent
>
>
>
> Hello,
>
> I am trying to simulate a virtual camera in a QmitkRenderWindow, the
> camera is fixed to the tip of a pointer object. I would like to modify the
> vtkRenderWindowInteractor so that modify the position of my object (and
> thus the camera as well) only by using the 2D coordinates the mouse
> sends(left button clicked), let's call it mouse navigation.
>
>
>
> I can access the vtkRenderWindowInteractor, but I don't know how to access
> the mouse clicked event and most important take the positions in the 3D
> world coordinates. I read about this in Display Geometry Interactor
> <http://mitk.org/wiki/Display_Geometry_Interaction_Project>, and looking
> at the RenderWindowInteractor documentation
> <https://www.vtk.org/doc/nightly/html/classvtkRenderWindowInteractor.html#ac0824fe498c523664ef739202cfc679f>
> I saw LeftButtonPressEvent
> <https://www.vtk.org/doc/nightly/html/classvtkRenderWindowInteractor.html#ac0824fe498c523664ef739202cfc679f>
> () that needs SetEventInformation() call.
>
>
>
> I am not sure how to use SetEventInformation() funcion... I guess I have
> to pass it the x and y display positions once clicked but if it "should be
> called just prior to" LeftButtonPressEvent
> <https://www.vtk.org/doc/nightly/html/classvtkRenderWindowInteractor.html#ac0824fe498c523664ef739202cfc679f>
> () it confuses me.
>
> Once I got the x and y positions I would do my computations so that move
> my object and the camera.
>
>
>
> I would be grateful if you could give me some tip! I don't know if this is
> the best way to achieve my objective or there is a better one.
>
>
>
> If it is not clear what I am asking feel free to make any question :)
>
>
>
> Thank you very much in advance.
>
>
>
> Best regards,
>
>
>
> Rocío
>
>
>
> --
>
> Rocío López Velazco
>
> *SimbioSYS group, BCN MedTech*
>
> *UniversityPompeu Fabra*
>
> *Department of Information and Communication Technologies *
>
> *Roc Boronat, 122
> <https://maps.google.com/?q=Roc+Boronat,+122&entry=gmail&source=g> (Tànger
> Building), 08018 Barcelona Office 55 119 *
> *https://bcn-medtech.upf.edu/ <https://bcn-medtech.upf.edu/>*
>
>
>
>
>
>
>
>
> --
>
> Rocío López Velazco
>
> *SimbioSYS group, BCN MedTech*
>
> *UniversityPompeu Fabra*
>
> *Department of Information and Communication Technologies *
>
> *Roc Boronat, 122
> <https://maps.google.com/?q=Roc+Boronat,+122&entry=gmail&source=g> (Tànger
> Building), 08018 Barcelona Office 55 119 *
> *https://bcn-medtech.upf.edu/ <https://bcn-medtech.upf.edu/>*
>
>
>
>
>
--
Rocío López Velazco
*SimbioSYS** group, BCN MedTech*
*UniversityPompeu Fabra*
*Department of Information and Communication Technologies Roc Boronat, 122
(Tànger Building), 08018 Barcelona Office 55 119
https://bcn-medtech.upf.edu/ <https://bcn-medtech.upf.edu/>*
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