Quick Start with VizModules

See the modules

Start with the hosted gallery to explore what each module can do: https://j-andrews7-VizModules.share.connect.posit.cloud/

You can also run the same gallery locally from this package:

library(shiny)
shiny::runApp(system.file("apps/module-gallery", package = "VizModules"))

Drop a module into your app

All modules follow the same pattern: *InputsUI() for controls, *OutputUI() for the plot, and *Server() for the logic. Here is a minimal scatterPlot example:

library(VizModules)

ui <- fluidPage(
    sidebarLayout(
        sidebarPanel(
            dittoViz_scatterPlotInputsUI("cars",
                mtcars,
                defaults = list(
                    x.by = "wt",
                    y.by = "mpg",
                    color.by = "cyl"
                )
            )
        ),
        mainPanel(dittoViz_scatterPlotOutputUI("cars"))
    )
)

server <- function(input, output, session) {
    dittoViz_scatterPlotServer("cars", data = reactive(mtcars))
}

shinyApp(ui, server)

Set defaults and hide controls

• Defaults: Pass a named list to the defaults argument of *InputsUI() to pre-fill inputs. Names match the underlying plot function arguments (e.g., defaults = list(fill.color = "steelblue")).
• Hide inputs: Use hide.inputs in the server call to remove controls while still initializing their values. This is useful when your app sets certain parameters itself.
• Hide tabs: Use hide.tabs to remove whole groups of controls (e.g., "Plotly" or "Legend/Scale" in scatterPlot).

dittoViz_scatterPlotServer(
    "cars",
    data = reactive(mtcars),
    hide.inputs = c("split.by", "rows.use"),
    hide.tabs = c("Plotly")
)

Hidden inputs and tabs still feed their values into the plot, so the module stays fully configured while exposing only what your users need.

App factory with createModuleApp()

To enable simple, consistent testing of any module, we provide an app factory function that returns a full standalone app with data import, a filterable data table, and dataset switching for any module - createModuleApp():

library(VizModules)

app <- createModuleApp(
    inputs_ui_fn = plotthis_BarPlotInputsUI,
    output_ui_fn = plotthis_BarPlotOutputUI,
    server_fn    = plotthis_BarPlotServer,
    data_list    = list("cars" = mtcars),
    title        = "My Bar Plot"
)
if (interactive()) runApp(app)

All built-in *App() convenience functions (e.g. plotthis_BarPlotApp(), linePlotApp()) are thin wrappers around createModuleApp() with sensible default data. You can also pass custom wrapper module functions to createModuleApp() for rapid prototyping.

Which plot parameters are exposed?

Modules wrap plotting functions from dittoViz, plotthis, and native plotting functions. To see which arguments are available in a module:

1. Open the module input help page, e.g., ?dittoViz_scatterPlotInputsUI or ?plotthis_AreaPlotInputsUI. The Details section notes which arguments from the underlying plot function are wired through and any that are intentionally omitted.
2. Cross-reference the base plot documentation (?dittoViz::scatterPlot, ?plotthis::AreaPlot, etc.). Input names in defaults line up with those function arguments when they are supported.

If an argument is listed as missing or non-functional in the module docs, it has been intentionally hidden because it does not round-trip well in the interactive Plotly output.