Sparkline-class: Sparkline widget

In termr: Modern Reactive Terminal Applications with Data Workflows

Sparkline widget

Description

See sparkline().

Super class

Widget -> Sparkline

Public fields

min, max

Fixed scale limits, or NULL to use the data range.

max_length

Values kept by push().

summary

How to fit more values than columns: "tail" (latest values) or "mean" (average buckets).

Active bindings

data

The values (reactive).

Methods

Public methods

• Sparkline$new()

• Sparkline$default_style()

• Sparkline$push()

• Sparkline$render_lines()

• Sparkline$content_width()

• Sparkline$clone()

Inherited methods

• Widget$add_class()
• Widget$ancestors()
• Widget$animate()
• Widget$arrange_children()
• Widget$bind()
• Widget$bind_reactive()
• Widget$bindings()
• Widget$blur()
• Widget$capture_mouse()
• Widget$child_clip()
• Widget$clear()
• Widget$computed_style()
• Widget$content_height()
• Widget$default_bindings()
• Widget$focus()
• Widget$format()
• Widget$get_state()
• Widget$has_class()
• Widget$invalidate()
• Widget$invalidate_paint()
• Widget$is_displayed()
• Widget$is_enabled()
• Widget$layout_descend()
• Widget$layout_differs()
• Widget$matches()
• Widget$mount()
• Widget$on()
• Widget$paint()
• Widget$post_message()
• Widget$print()
• Widget$pseudo_states()
• Widget$query()
• Widget$query_one()
• Widget$refresh()
• Widget$release_mouse()
• Widget$remove()
• Widget$remove_children()
• Widget$remove_class()
• Widget$render()
• Widget$replace()
• Widget$run_action()
• Widget$run_process()
• Widget$run_worker()
• Widget$set()
• Widget$set_interval()
• Widget$set_state()
• Widget$set_timeout()
• Widget$toggle_class()
• Widget$walk()

---

Sparkline$new()

Create a sparkline. See sparkline().

Usage

Sparkline$new(
  data = numeric(),
  min = NULL,
  max = NULL,
  summary = "tail",
  max_length = 1000L,
  id = NULL,
  classes = NULL,
  style = NULL
)

Arguments

data

Numbers.

min, max

Scale limits.

summary

Fitting strategy.

max_length

Values kept by push().

id, classes, style

See Widget.

---

Sparkline$default_style()

The built-in style.

Usage

Sparkline$default_style()

---

Sparkline$push()

Append values (keeping at most max_length).

Usage

Sparkline$push(x)

Arguments

x

Numbers.

---

Sparkline$render_lines()

The bars for a given width.

Usage

Sparkline$render_lines(width = NA_integer_)

Arguments

width

Content width.

---

Sparkline$content_width()

Natural width: one column per value.

Usage

Sparkline$content_width()

---

Sparkline$clone()

The objects of this class are cloneable with this method.

Usage

Sparkline$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

termr documentation built on Oct. 21, 2026, 5:13 p.m.