Custom Bullet Chart

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

Full bullet styling: gauge.bar: %{color:, thickness:} styles the value bar. gauge.bgcolor: sets the bullet background. delta.relative: true shows percentage change from reference.

alias Plotly.{Figure, Indicator}

Figure.new()
|> Figure.add_trace(
  Indicator.new(
    mode: "number+gauge+delta",
    value: 220,
    title: %{text: "Revenue"},
    delta: %{reference: 200, relative: true, position: "top"},
    number: %{suffix: "$", font: %{size: 20}},
    gauge: %{
      shape: "bullet",
      axis: %{range: [nil, 300]},
      bar: %{color: "darkblue", thickness: 0.2},
      bgcolor: "white",
      borderwidth: 2,
      bordercolor: "gray",
      steps: [
        %{range: [0, 150], color: "cyan"},
        %{range: [150, 250], color: "royalblue"}
      ],
      threshold: %{
        line: %{color: "red", width: 2},
        thickness: 0.75,
        value: 280
      }
    },
    domain: %{x: [0, 1], y: [0, 1]}
  )
)
|> Figure.update_layout(
  width: 600,
  height: 250,
  paper_bgcolor: "lavender"
)
|> Plotly.show()