Mouse event gap in RStudio ?

juba / robservable

Observable notebooks as R htmlwidgets

https://juba.github.io/robservable/

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Mouse event gap in RStudio ? #18

Closed juba closed 4 years ago

juba commented 4 years ago

When using this notebook :

robservable(
  "@mbostock/eyes"
)

There seems to be a gap between mouse coordinates and actual mouse position. The more the mouse goes to the bottom right corner, the more the gap seems visible.

It seems to be the same when displaying only the chart :

robservable(
  "@mbostock/eyes",
  cell = c("canvas", "mouse"),
  hide = "mouse"
)

juba commented 4 years ago

This issue seems very specific :

it doesn't occur when opened in a browser
it doesn't occur if width or height is specified
it doesn't occur after the widget is resized
it doesn't occur if the line context.canvas.style.width = "100%"; is commented out in the notebook

I didn't encounter the issue in other notebooks which use mouse position, so it must be some very specific interaction...