[Paraview-developers] DoubleVectorProperty (Slider) range set at run time

[Pascal S. Meysonnat]

On 03/29/2018 04:45 AM, Mathieu Westphal wrote:
> Hello Pascal,
>
> First, i would suggest identifying a widget in ParaView that behave
> the way you would like your widget to behave, then take a look into
> this widget XML for inspiration.
>
> There may be a way to do what you want to do, but you will need to
> precise, where do these "at run-time min and max" values come from ?
>
> Also what do you mean by increment ? There is no such concept of
> increment in ParaView slider based widgets.
>
> Best regards,
>
> Mathieu Westphal
>
> On Wed, Mar 28, 2018 at 9:15 PM, Pascal Meysonnat
> <p.meysonnat at aia.rwth-aachen.de
> <mailto:p.meysonnat at aia.rwth-aachen.de>> wrote:
>
>     Dear all, 
>
>     I am currently developing a new plugin for our in-house solver and
>     would like to have a slider to select certain values which are
>     only known at run time. I have seen the property panel
>     configuration for such a case to look similar to:
>
>      <DoubleVectorProperty
>              Name="Values"
>              command="SetValues"
>              number_of_elements="1"
>              default_values="1">
>              panel_widget="int_range">
>            <ArrayRangeDomain name="range">
>              <RequiredProperties>
>                <Property function="Input"
>                          name="Input" />
>              </RequiredProperties>
>            </ArrayRangeDomain>
>          </DoubleVectorProperty>
>
>     I am not fully sure on how to set the range properly at the run
>     time. Let’s for example say i know at run time the range of the
>     slider should be 1…8. How can i set the range properly and how can
>     I set the increment? Is there some small example I can may be have
>     a look at?
>
>     Thank you very much for your help, 
>
>     Regards, 
>
>     Pascal 
>
>     --
>     Dr.-Ing. Pascal S. Meysonnat
>
>     Chair of Fluid Mechanics and Institute of Aerodynamics
>     RWTH Aachen University
>     Wüllnerstraße 5a
>     D-52062 Aachen
>     Germany
>
>
>
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Dear Mathieu,

I finally managed to get it work in the end, except for one special
question which remains open. Here is the solution.

In the xml file I hat to use the function RangeInfo (see below):

 <DoubleVectorProperty name="LevelRange"
        command="GetLevelRange"
        information_only="1"
        number_of_elements="2"
        default_values="-1 -10">
       <SimpleDoubleInformationHelper />
      </DoubleVectorProperty>

     <DoubleVectorProperty
         name="MaxLevelToShow"
         command="SetMaxLevelToShow"
         information_property="LevelRange"
         number_of_elements="2"
         animateable="1"
         default_values="0 0"
         panel_widget="double_range">
       <DoubleRangeDomain name="range" >
          <RequiredProperties>
              <Property name="LevelRange" function="RangeInfo"/>
          </RequiredProperties>
        </DoubleRangeDomain>
     </DoubleVectorProperty>

and in the *.h file of the reader, the Macro had to be set

vtkGetVector2Macro(LevelRange, int);

as well as 

int LevelRange[2];

Finished! Now I can read the values into LevelRange from the
RequestInformation and the sliders appear correctly. There is just one
final thing which is missing. I have integer values and I would like the
sliders to be rather of an integer type than being of double type, i.e.,
i would like them do change in full integer values? Is there a way to
achieve this?

Best Regards

Pascal Meysonnat





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