handle_brush: Handle brush events on a visualisation.

In ggvis: Interactive Grammar of Graphics

Handle brush events on a visualisation.

Description

Currently for brush events to be triggered on a visualisation, you must use a .brush property. This limitation will be lifted in the future.

Usage

handle_brush(vis, on_move = NULL, fill = "black")

Arguments

vis	Visualisation to listen to.
on_move	Callback function with arguments: items A data frame containing information about the items under the plot. An empty data.frame if no points under the brush. page_loc Location of the brush with repsect to the page plot_loc Location of the brush with respect to the plot session The session, used to communicate with the browser
fill	Colour of the brush.

Examples

# Display tooltip when objects are brushed
mtcars %>%
  ggvis(x = ~wt, y = ~mpg, size.brush := 400) %>%
  layer_points() %>%
  handle_brush(function(items, page_loc, session, ...) {
    show_tooltip(session, page_loc$r + 5, page_loc$t, html = nrow(items))
  })

ggvis documentation built on May 29, 2024, 1:12 a.m.