[Paraview] Extract Selection using Python

[Albrecht Kyrieleis]

I have noticed the class with the StartSelection and EndSelection methods.

If I only use the StartSelection routine the InteractionMode is set
correctly, but I don't get the rectangle. Do I have to set any visibility ?

Where can I find  an example where the MouseInteraction method is used in a
ParaViewWeb application ?  I would like to use the mouse coordinates from 2
left-clicks to provide to the EndSelection routine.

Many thanks

kyr.


On 27 January 2014 21:06, Sebastien Jourdain <sebastien.jourdain at kitware.com
> wrote:

> Hi Kyr,
>
> 1) The rectangle should show up with master or 4.1 release.
>
> 2) The version 4.1 does have a protocol that manage selection, you may
> want to start looking into that.
>
> Seb
>
>
> On Mon, Jan 27, 2014 at 7:18 AM, Albrecht Kyrieleis <akyrieleis at gmail.com>wrote:
>
>> Hi,
>>
>> I am trying to write a Python function that can be used in ParaviewWeb to
>> extract the values of a point data set after a selection has been made (I
>> am using basically pv_web_visualizer with a custom protocol that contains
>> my python functions). I am struggling with 2 problems:
>>
>> 1) I cannot figure out how to display the rectangle for the selection in
>> ParaviewWeb. With
>>
>>  RenderView1 = simple.GetRenderView()
>>  RenderView1.InteractionMode = "Selection"
>>
>> only the mouse mode is changed, but no rectangle is shown.
>>
>>
>> 2)  Using the normal Paraview GUI, after I have made a selection I can do
>> in the Python shell:
>>
>> sel=ExtractSelection()
>>
>> this creates the Extract Selection filter which I need to finalize using
>> the 'Apply' button.
>>
>> In the Python shell I can then access the data in that selection using:
>>
>> datsel=servermanager.Fetch(sel)
>> ar0=datsel.GetPointData().GetArray(0)
>> ar0.GetTuple1(0)
>>
>> In ParavewWeb, ExtractSelection  does not pick up any selection that I
>> have made. But it might also be that using the code in 1) is not enough to
>> enable the selection tool.
>>
>> in ParaviewWeb, how can I obtain the IDs of the points in the selection
>> so that I can fetch the values ?
>>
>> Any help or ideas would be greatly appreciated.
>>
>> Thank you very much
>>
>> kyr.
>>
>>
>>
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