[vtkusers] ​SetClientData in python (David Gobbi)

[Bill Lorensen]

Andrew,

I do want to make the examples available to at least 6.0 users. We can
add c++ 11 stuff if we can exclude those examples based on VTK
versions.

Bill


On Sat, Nov 11, 2017 at 6:07 PM, Andrew Maclean
<andrew.amaclean at gmail.com> wrote:
> I'll do an example for this.
>
> I'm also thinking that since we are using C++11 we should be able to use
> lambda expressions. I'll also do an example for that.
>
> Regards
>    Andrew
>
>
> On Sun, Nov 12, 2017 at 8:59 AM, Andrew Maclean <andrew.amaclean at gmail.com>
> wrote:
>>
>> David,
>>
>> When I try this I get:
>> TypeError: DummyFunc() missing 1 required positional argument: 'data'
>>
>> I used a slightly different approach in
>> https://lorensen.github.io/VTKExamples/site/Python/VisualizationAlgorithms/StreamlinesWithLineWidget/
>>
>> Regards
>>    Andrew
>>
>>    2. Re:
>> SetClientData in python (David Gobbi)
>>>
>>> ---------- Forwarded message ----------
>>> From: David Gobbi <david.gobbi at gmail.com>
>>> To:
>>>  "Serge K." <skab12 at gmail.com>
>>> Cc: VTK Users <vtkusers at vtk.org>
>>> Bcc:
>>> Date: Fri, 10 Nov 2017 11:17:26 -0700
>>> Subject: Re: [vtkusers] SetClientData in python
>>> Hi Serge,
>>>
>>> The way to do this in Python is to add attributes to your callback
>>> function.
>>>
>>>     def DummyFunc(obj, ev, data):
>>>         print(ev, data)
>>>
>>>
>>> DummyFunc.CallData = whatever
>>>
>>>     interactor.AddObserver('LeftButtonPressEvent', DummyFunc)
>>>
>>> So the vtkCallbackCommand really isn't needed in Python (and, as you have
>>> noticed, it really can't be used in Python anyway).
>>>
>>>  - David
>>>
>>>
>>>
>>> On Fri, Nov 10, 2017 at 10:32 AM, Serge K. <skab12 at gmail.com> wrote:
>>>>
>>>> Hi All,
>>>>
>>>> I am playing with MouseEventObserver.py example and I would like to add
>>>> a ClientData on my callback function. There are many examples in C++ like
>>>> this one: https://www.vtk.org/Wiki/VTK/Examples/Cxx/Interaction/ClientData
>>>>
>>>> However, I do not know how to do that in Python.
>>>>
>>>> Indeed, if I create a  vtkCallbackCommand , SetCallBack function does
>>>> not exist.
>>>>
>>>> Any Idea? Thanks for your answer.
>>>>
>>>> Serge
>>>>
>>>> ps: python36 - vtk 7.1.1
>>>>
>>>>
>>>> #!/usr/bin/env python
>>>> from __future__ import print_function
>>>>
>>>> import vtk
>>>>
>>>> source = vtk.vtkSphereSource()
>>>> source.SetCenter(0, 0, 0)
>>>> source.SetRadius(1)
>>>> source.Update()
>>>>
>>>> mapper = vtk.vtkPolyDataMapper()
>>>> mapper.SetInputConnection(source.GetOutputPort())
>>>>
>>>> actor = vtk.vtkActor()
>>>> actor.SetMapper(mapper)
>>>>
>>>> renderer = vtk.vtkRenderer()
>>>> renderer.SetBackground(1, 1, 1)
>>>> renderer.AddActor(actor)
>>>>
>>>> renwin = vtk.vtkRenderWindow()
>>>> renwin.AddRenderer(renderer)
>>>>
>>>> interactor = vtk.vtkRenderWindowInteractor()
>>>> interactor.SetInteractorStyle(vtk.vtkInteractorStyleTrackballCamera())
>>>> interactor.SetRenderWindow(renwin)
>>>>
>>>> def DummyFunc(obj, ev, my_obj_2):
>>>>     print(obj, my_obj_2)
>>>>
>>>> # obj_2 = vtk.whatever()
>>>> # How do I pass my obj_2 ?
>>>> interactor.AddObserver('LeftButtonPressEvent', DummyFunc)
>>>> interactor.Initialize()
>>>> interactor.Start()
>>>
>>>
>>>
>>
>> --
>> ___________________________________________
>> Andrew J. P. Maclean
>>
>> ___________________________________________
>
>
>
>
> --
> ___________________________________________
> Andrew J. P. Maclean
>
> ___________________________________________
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/vtkusers
>



-- 
Unpaid intern in BillsBasement at noware dot com