# Get proxy by click in paraview web
**URL:** https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310
**Category:** Web Support
**Created:** [November 23, 2023, 6:57am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310 "2023-11-23T06:57:35Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [November 23, 2023, 6:57am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/1 "2023-11-23T06:57:35Z")
Hi Paraview,
I notice that in Paraview, you can right click on a proxy and set properties like visibility, color, representation, etc. I wonder if I can also achieve it in paraview web such as Paraview-lite.
So far, I tried to call `selectCells` method by passing the event’s coordinate, but this method only return a null object. It will be great if I can set a `interactorEvents` which return the proxy id or proxy name.
Thank you!
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### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [November 27, 2023, 7:42am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/2 "2023-11-27T07:42:10Z")
In the traced script, paraview use `FindSource` with the proxy name without any position information. And I found `selectCells` by default take the active source as input rather than the source you click on.
I wonder if there’s any chance to know which proxy is clicked/selected in python script. Or is there something like `FindSourceByPosition(x, y)` that returns a proxy?
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 27, 2023, 7:39pm UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/3 "2023-11-27T19:39:51Z")
Not sure about the details, but [that example](https://github.com/Kitware/trame/blob/master/examples/07_paraview/Picking/pv_selection.py) may help the Python side.
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### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [November 28, 2023, 2:56am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/4 "2023-11-28T02:56:54Z")
Hi @jourdain,
Thank you for the reply. The example you show uses the same function (`simple.SelectSurfacePoints`) as I did before. I can create the selection (with magenta points), but I cannot infer which source I selected.
What I tried to infer the source by selection is:
```auto
s = selection.SelectSurfacePoints(Rectangle=[x1, y1, x2, y2], Modifier=None)
es = simple.ExtractSelection()
selectedSource = es.Input
```
But I found `selectedSource` is always the same source, since `SelectSurfacePoints` takes the active source by default. When I am curious about how Paraview achieves it in Desktop app, I found the active source is somehow set by source name during the process.
```auto
# create a surface points selection
SelectSurfacePoints(Rectangle=[1365, 353, 1365, 353], Modifier=None)
# find source
contour3 = FindSource('Contour3')
# set active source
SetActiveSource(contour3)
# create a new 'Extract Selection'
extractSelection1 = ExtractSelection(registrationName='ExtractSelection1', Input=contour3)
```
Is there any clue about how Paraview set the correct source active beyond python script?
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 28, 2023, 7:06pm UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/5 "2023-11-28T19:06:11Z")
I will have to investigate more to provide the proper pointers. But unfortunately, I won’t be able to look into it any time soon but my guess is that the selection object does have that information.
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### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [November 29, 2023, 2:41am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/6 "2023-11-29T02:41:05Z")
No problem. Thank you for your time.
---
### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [December 8, 2023, 2:40am UTC](https://discourse.paraview.org/t/get-proxy-by-click-in-paraview-web/13310/7 "2023-12-08T02:40:43Z")
Hi @jourdain,
I found a tricky way to achieve what I want, which is based on a fact:
The `Selection` property of `ExtractSelection` filter over a source has value (Class `AppendSelection`) only if the source has selections on it.
Here’s the pseudo code.
```auto
for source in GetSources():
es = ExtractSelection(source)
if es.Selection is not None: # exist selection on the source
ClearSelection(source)
Delete(es)
return source
```
I wonder if there’s a property on each source that stores selection information or there’s a global proxy to store all selection information including their corresponding sources. If this approach reminds you anything, I am happy to hear it! Thank you!