[Paraview] Widgets and RequestData

[Christoffer Green]

I have now figured out the problem, the unsigned long GetMTime() function
needs to be overloaded to report a new modified time (this updated time is
in the widget/vtkImplicitFunction). When the filter has a new modified time
then RequestData gets called.

This message written so that if anybody else ever has this problem they
might have an easier time with it.

BR/ Christoffer

On Thu, Aug 25, 2011 at 4:31 PM, Christoffer Green <
christoffer.green at gmail.com> wrote:

> Hello
>
> I have created a vtk filter that has an implicit widget attached, the
> widget shows up in the 3d view but
> it never updates the filter (the RequestData method is never executed in
> the filter after interacting with the widget). If the current
> frame is changed the RequestData method does execute with the updated
> values from the widget though. Is there
> something special that needs to be done with the widget so that this
> happens?
>
> Here is the xml:
>
>    <SourceProxy name="FourFlowVolumeTraceNormal"
> class="vtkFourFlowVolumeTrace" label="VolumeTrace">
>
>     <InputProperty name="Input" command="SetInputConnection">
>           <ProxyGroupDomain name="groups">
>             <Group name="sources"/>
>             <Group name="filters"/>
>           </ProxyGroupDomain>
>           <DataTypeDomain name="input_type">
>             <DataType value="vtkDataSet"/>
>           </DataTypeDomain>
>      </InputProperty>
>
>      <ProxyProperty name="ClipFunction" command="SetClipFunction"
> label="Clip Type">
>            <ProxyGroupDomain name="groups">
>                <Group name="implicit_functions"/>
>            </ProxyGroupDomain>
>            <ProxyListDomain name="proxy_list">
>               <Proxy group="implicit_functions" name="Plane" />
>               <Proxy group="implicit_functions" name="Box" />
>               <Proxy group="implicit_functions" name="Sphere" />
>            </ProxyListDomain>
>      </ProxyProperty>
>
>       <DoubleVectorProperty
>          name="ISOValue"
>          command="SetISOValue"
>          number_of_elements="1"
>          animateable="0"
>          default_values="0.02"
>          information_property="ISOValueInfo">>
>       </DoubleVectorProperty>
>
>       <DoubleVectorProperty
>          name="ISOValueInfo"
>          command="GetISOValue"
>          information_only="1">
>          <SimpleDoubleInformationHelper/>
>       </DoubleVectorProperty>
>
>    </SourceProxy>
>
> Thanks
> BR/ Christoffer
>
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