[Paraview] Singleton vtkObject multiple SMProxies

[David E DeMarle]

Utkarsh will probably say there is a better way to do it, but in the
mean time take a look at how that pattern is implemented for the
streaming applications.

There I used a singleton to store system wide options where things
like the number of render passes and the state of debug flags. Long
ago that state was right in the vtkPVProcessModule, but I eventually
moved it out of there and did it this more convoluted way so a not to
pollute the main application with streaming specific code.

See:
Applications/AdaptiveParaView/Plugin/
vtkAdaptiveOptions - the 'singleton', for which one exists on all
processes and all have identical contents
vtkSMAdaptiveOptionsProxy - the servermanager access to the above
pqGlobalAdaptiveViewOptions - one place in the GUI where the use can
change the contents
all over in that directory - code that uses the values in the singleton

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109



On Thu, Jun 17, 2010 at 6:26 AM, Biddiscombe, John A. <biddisco at cscs.ch> wrote:
> I have a singleton vtkObject, but multiple paraview panels and other items
> use it via proxies which are created independently.
>
>
>
> I’d like changes in any one to be propagated to all, but need to connect the
> underlying vtkObject modified event to the proxies – the proxy doesn’t seem
> to do this automatically. Is there a way to achive this? (is it possible to
> use a singleton SMproxy? that’d solve the problem I’m sure).
>
>
>
> Secondly : I have a custom panel for the object, when I instantiate a filter
> with a proxyproperty
>
>       <ProxyProperty name="SPHManager"
>
>                      command="SetSPHManager">
>
>         <ProxyGroupDomain name="groups">
>
>           <Group name="meshless_helpers"/>
>
>         </ProxyGroupDomain>
>
>         <ProxyListDomain name="proxy_list">
>
>           <Proxy group="meshless_helpers"
>
>                  name="SPHManager" />
>
>         </ProxyListDomain>
>
>       </ProxyProperty>
>
>
>
> it doesn’t call the plugin to to try to create the panel. It works ok, for a
> panel that represents a whole filter. And it works for a panel for a widget
> (proxy property), but it doesn’t work for an arbitrary proxyproperty. Is
> there a way to make it work?
>
>
>
> thanks
>
>
>
> JB
>
>
>
> --
>
> John Biddiscombe,                            email:biddisco @ cscs.ch
>
> http://www.cscs.ch/
>
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
>
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
>
>
>
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