Creating Default Item Values

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

Section

annotationdefaults (and similar *defaults keys) in a template apply styling to all items of that type that do NOT have a templateitemname. This is how you set global defaults without naming each item.

alias Plotly.{Figure, Scatter}

template = %{
  layout: %{
    annotationdefaults: %{
      font: %{size: 14, color: "green"},
      showarrow: true,
      arrowhead: 2,
      arrowcolor: "green"
    }
  }
}

Figure.new()
|> Figure.add_trace(Scatter.new(x: [1, 2, 3], y: [2, 4, 3], mode: "markers", marker: %{size: 12}))
|> Figure.update_layout(
  title: "Default Annotation Values from Template",
  template: template,
  annotations: [
    %{text: "Peak", x: 2, y: 4, ax: 0, ay: -40},
    %{text: "Start", x: 1, y: 2, ax: -40, ay: 0}
  ]
)
|> Plotly.show()