Customization & Themes
In dtsmartr: Interactive Virtualized Data Explorer Grid Widget

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

dtsmartr supports deep interface customization through dtsmartr_options(). Developers can toggle UI panels, control access to analytical utilities, customize missing cell representations, and switch between light and dark themes.

1. Visual Color Themes (Dark Mode)

dtsmartr features a modern, premium dark palette designed for clinical environments and night shifts.

theme = "auto" (Default): Automatically detects browser/system settings and matches the theme of your IDE (RStudio or Positron).
theme = "light": Forces the clean light theme.
theme = "dark": Forces the sleek dark theme.

2. Optional UI Feature Toggles

You can enable or disable individual layout elements depending on the context:

advanced_filter: Set FALSE to hide the rule-based Query Builder toolbar.
column_picker: Set FALSE to remove the column dropdown visibility picker in the top-right toolbar.
allow_export: Set FALSE to remove the clipboard code generator modal button.
header_summary: Set FALSE to collapse the column headers into clean, flat labels—removing the spark-histograms, top categories bar, and missingness progress indicators.

3. Custom Missing Value Strings (`na_string`)

Control how missing/null values are represented. Cells containing NA or null will render as italicized, muted-gray cells:

Default: Displays "NA".
Custom: Set na_string = "—" or na_string = "Missing" to specify custom text.

4. Pre-Hidden Columns (`hidden_columns`)

Specify a vector of column names to hide by default on initial rendering. Users can still show them using the column picker (if enabled):

Example: hidden_columns = c("cyl", "hp").

5. Grid Layout & Row Densities (`header_density` and `row_density`)

Configure the initial layout density programmatically:

header_density: Sets the initial header layout height.
"auto" (Default): Scales dynamically based on screen height.
"minimal": Forces a super-flat 48px header height.
"detailed": Forces the full Kaggle-style summary zone.
row_density: Sets the row padding and vertical spacing.
"standard" (Default): Balanced 32px row height.
"compact": Ultra-dense 24px row height (max visibility).
"comfortable": Relaxed 40px row height.

6. Live Theme & Customization Example

Below is a live interactive grid rendering in Dark Mode with pre-hidden variables (hp, vs), custom missing cell markers (na_string = "—"), and compact density preset:

library(dtsmartr)

dtsmartr(
  data = mtcars,
  options = dtsmartr_options(
    theme           = "dark",
    hidden_columns  = c("hp", "vs"),
    na_string       = "—",
    header_density  = "minimal",
    row_density     = "compact"
  )
)