display mode = 'showcase' : scroll window for code (on the right) is shorter than the app window

Sanjmeh · September 10, 2019, 4:14pm

I find the runApp('shinydir',display.mode = "showcase") quite useful for identifying which server sections get executed as the shiny app progresses.

But one annoying aspect is that the code window (on the right side) cannot be scrolled down to as much as the shiny app (on the left side) can scroll down. Perhaps the code window has got a hard stop. Even when the remaining shiny app screen can be scrolled down the code window remains stuck in a very small section. Due to this limitation we keep missing the code section that is executing and have to repeatedly go up and down to check the code section that is highlighted as yellow.

We can either solve this by allowing an infinite scroll of code window (independent of the app window) or better still an auto scroll to the yellow highlighted section.

jcblum · September 15, 2019, 5:04am

Hi @Sanjmeh!

It looks like there's a related open issue in the shiny GitHub tracker:

github.com/rstudio/shiny

Feature request: Jump to highlighted line in showcase mode

opened 03:23AM - 30 Jun 17 UTC

mine-cetinkaya-rundel

Feature: Showcase Mode

If one has a complex app with an `app.R` file with many lines of code, it become…s difficult to see the highlighted lines of code when interacting with the app, which is helpful information for revealing how reactivity works in the app. Depending on how long the `app.R` script is (especially the `ui` object definition, which tends to be on top of the file) even the "show with app" option in the showcase mode might not be enough to view the highlighted code and the app at the same time. Functionality to jump to highlighted line(s) in showcase mode would be helpful.

You can contribute by voting with an emoji reaction, or adding more relevant examples or use cases .

system · November 8, 2019, 9:04am

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