Shiny bindings for lineage_flow — lineage

Output and render functions for using lineage_flow within Shiny applications and interactive Rmd documents. When the viewer clicks a column to trace it, the app receives input$<outputId>_selected: a list with table and column entries, or NULL once the trace is released, ready to feed lineage_upstream() and lineage_downstream() on the server side.

Usage

lineage_flowOutput(outputId, width = "100%", height = "400px")

renderLineageFlow(expr, env = parent.frame(), quoted = FALSE)

Arguments

outputId: output variable to read from
width, height: Must be a valid CSS unit (like '100%', '400px', 'auto') or a number, which will be coerced to a string and have 'px' appended.
expr: An expression that generates a lineage_flow
env: The environment in which to evaluate expr.
quoted: Is expr a quoted expression (with quote())? This is useful if you want to save an expression in a variable.

Value

lineage_flowOutput() returns a shiny.tag.list holding the HTML element and dependencies that place the lineage widget in a Shiny UI. renderLineageFlow() returns a shiny.render.function to assign to an output slot; Shiny calls it to render the widget expr produces.

Examples

if (interactive() && requireNamespace("shiny", quietly = TRUE)) {
  library(shiny)

  ui <- fluidPage(
    lineage_flowOutput("lineage", height = "600px")
  )
  server <- function(input, output, session) {
    output$lineage <- renderLineageFlow(lineage_example())
  }
  shinyApp(ui, server)
}