Clicking on an X-Y plane (e.g. plot, image) in a survey

[rgmerck]

Description

Hi again, one of the thing that is probably possible thanks to Shiny would be to support questions where the answer is not really a regular user input as text or a radio button, but a position on a picture or a selection on a picture. There are many psychological tests where respondents are asked to put "where are you on this map" or "there are two X and Y axes for these dimensions, where would you put yourself in there?". Shiny has reactive elements that can handle the detection of a single click on a picture or even a selection on a picture, and would return coordinates or a range of coordinates for the data.

Probably not a super common use case, but that's something most survey systems do not offer, and something I would definitely use myself.

[jhelvy]

Very cool, and yes that could definitely be done. But I'm not sure if this would be something to support in sd_question() as this would likely require a lot of custom settings based on the context (e.g. is the image a ggplot, a static image, etc.).

What could be done is you could set this up where in your server() function in the app.R file you could have an image rendered and stored in the output, e.g.:

output$map <- renderPlot({ something here }) # Or some other render function

Then in your survey.qmd file you put where you want that to be displayed just like in a normal shiny app, either using sd_output() or some other shiny output function.

Then if there are some things that get captured in the server like the position they clicked, you could store those values to the data using sd_store_value().

Haven't tried it but that's a starting point if you want to give it a shot.

[pingfan-hu]

Hi @rgmerck , I leave a comment here so this discussion appears on my notification box. This is a great idea. I'll put it on my list and work on it in the near future.

[pingfan-hu]

Hi @rgmerck , here is the solution: we have a new function called sd_question_custom(), which is a placeholder for you to define a customized question.

This demo is a showcase of the leaflet map question utilizing the sd_question_custom() function. You can take a look and play with it.

The map question looks like this:

This demo is a showcase of the plotly X-Y plane question utilizing the sd_question_custom() function. You can take a look as well.
The plot looks like this:

The demo codes have package installation codes prepared on the top of the app.R file so you can install the necessary packages by one click.