[vtkusers] Grab Alt key once again.

[Mengda Wu]

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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>> >>
>> >> --
>> >> Unpaid intern in BillsBasement at noware dot com
>> >
>> >
>>
>>
>>
>> --
>> Unpaid intern in BillsBasement at noware dot com
>>
>
>
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