[vtkusers] Grab Alt key once again.

[Cory Quammen]

Hi Mengda,

I posted a patch here:

https://gitlab.kitware.com/vtk/vtk/merge_requests/1129

Mind testing it?

Thanks,
Cory

On Fri, Jan 22, 2016 at 1:58 PM, Mengda Wu <wumengda at gmail.com> wrote:

> Hi all,
>
>    I think this issue is still not fixed in the vtk 7.0. Can anyone apply
> this patch?
>
> Thanks,
> Mengda
>
> On Mon, Sep 16, 2013 at 4:11 PM, Mengda Wu <wumengda at gmail.com> wrote:
>
>> Hi Bill,
>>
>>    Here is the patch to QVTKInteractorAdapter.cxx (from VTK5.10.1). I
>> found we can just properly add SetAltKey() without modifying the interface
>> of SetEventInformation(). I tested on my machine. It worked well.
>>
>> Thanks,
>> Mengda
>>
>>
>>
>> On Fri, Sep 6, 2013 at 5:49 PM, Bill Lorensen <bill.lorensen at gmail.com>
>> wrote:
>>
>>> Can you try this and provide a patch?
>>>
>>>
>>> On Fri, Sep 6, 2013 at 5:45 PM, Mengda Wu <wumengda at gmail.com> wrote:
>>> > Thanks for your reply!
>>> > I think the window manager (e.g. menu bar can intercept "Alt" key) may
>>> be
>>> > just one of the reasons.
>>> >
>>> > Another reason is found to be in vtkRenderWindowInteractor.cxx/.h. If
>>> you
>>> > search for "AltKey" in the files, you will notice that the variable
>>> has not
>>> > been changed anywhere. If you search for "ControlKey", you can see the
>>> > difference.
>>> >
>>> > My suggestion would be to add another variable "alt" in
>>> > SetEventInformation(). And make "AltKey" really reflects if "alt" key
>>> is
>>> > received by the vtkRenderWindowInteractor. Of course, this will also
>>> require
>>> > changes in other locations where this function is called (e.g. in
>>> > QVTKInteractorAdapter.cxx).
>>> >
>>> > Thanks,
>>> > Mengda
>>> >
>>> >
>>> >
>>> >
>>> > On Mon, Sep 2, 2013 at 4:08 PM, Bill Lorensen <bill.lorensen at gmail.com
>>> >
>>> > wrote:
>>> >>
>>> >> Your window manager is intercepting the alt click. If you really need
>>> >> it, then google for a solution on your specific platform.
>>> >>
>>> >>
>>> >> On Mon, Sep 2, 2013 at 3:39 PM, Mengda Wu <wumengda at gmail.com> wrote:
>>> >> > Hi all,
>>> >> >
>>> >> >    I have similar problem with Alt key on Windows 7 64 bit machine.
>>> Does
>>> >> > anyone know why is that? My guess is the alt key event is not even
>>> >> > propagated to VTK event handling. The following VTK example page
>>> also
>>> >> > mentioned this issue.
>>> >> >
>>> >> >
>>> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Interaction/ShiftAndControl
>>> >> >
>>> >> > Thanks,
>>> >> > Mengda
>>> >> >
>>> >> >
>>> >> > On Mon, Feb 20, 2012 at 11:57 AM, Jesús Spí­nola <
>>> jspinola at gmail.com>
>>> >> > wrote:
>>> >> >>
>>> >> >> Hi,
>>> >> >>
>>> >> >> I want to know when the "Alt" key is pressed so I use
>>> >> >> vtkRenderWindowInteractor::GetAltKey(), but it seems it only
>>> returns
>>> >> >> true
>>> >> >> when "AltGr" is pressed. When I press "Alt" key, I always get
>>> false.
>>> >> >> I tested under W7 x64.
>>> >> >>
>>> >> >> Is that a bug or should I use another method?
>>> >> >>
>>> >> >> Thanks in advance!
>>> >> >>
>>> >> >> --
>>> >> >> Jesús Spínola
>>> >> >>
>>> >> >> _______________________________________________
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>>> >> >>
>>> >> >
>>> >> >
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>>> >>
>>> >>
>>> >>
>>> >> --
>>> >> Unpaid intern in BillsBasement at noware dot com
>>> >
>>> >
>>>
>>>
>>>
>>> --
>>> Unpaid intern in BillsBasement at noware dot com
>>>
>>
>>
>
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>


-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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