Angle Slider form

    <.form for={@form} phx-submit="save_phoenix">
  <.angle_slider
    field={@form[:angle]}
    marker_values={[0, 90, 180, 270]}
    class="angle-slider"
  >
    <:label>Angle</:label>
    <:error :let={msg}>
      <.heroicon name="hero-exclamation-circle" class="icon" />
      {msg}
    </:error>
  </.angle_slider>
  <.action type="submit" class="button button--accent">Submit</.action>
</.form>

  

    defmodule MyAppWeb.AngleSliderFormLive do
  use MyAppWeb, :live_view

  def mount(_params, _session, socket) do
    phoenix_form =
      Phoenix.Component.to_form(%{"angle" => "0"}, as: :angle_slider_phoenix, id: "angle-slider-live-form-phoenix")

    {:ok, assign(socket, :phoenix_form, phoenix_form)}
  end

  def handle_event("save_phoenix", %{"angle_slider_phoenix" => params}, socket) do
    angle = params["angle"] || ""

    {:noreply,
     assign(
       socket,
       :phoenix_form,
       Phoenix.Component.to_form(%{"angle" => angle}, as: :angle_slider_phoenix, id: "angle-slider-live-form-phoenix")
     )}
  end
end

  

    <.form
  for={@form}
 
  phx-change="validate_angle_range"
  phx-submit="save_angle_range"
      >
  <.angle_slider
    field={@form[:angle]}
    marker_values={[0, 90, 180, 270]}
    on_value_change="angle_range_changed"
    class="angle-slider"
  >
    <:label>Angle (0–90)</:label>
    <:error :let={msg}>
      <.heroicon name="hero-exclamation-circle" class="icon" />
      {msg}
    </:error>
  </.angle_slider>

  <.action type="submit" class="button button--accent">Submit</:action>
</.form>

  

    defmodule MyAppWeb.AngleSliderFormLive do
  use MyAppWeb, :live_view

  def mount(_params, _session, socket) do
    ecto_form =
      %MyApp.Forms.AngleSlider{}
      |> MyApp.Forms.AngleSlider.changeset_validate(%{})
      |> Phoenix.Component.to_form(as: :angle_slider_ecto, id: "angle-slider-live-form-ecto")

    {:ok, assign(socket, :ecto_form, ecto_form)}
  end

  def handle_event("validate", %{"angle_slider_ecto" => params}, socket) do
    changeset =
      %MyApp.Forms.AngleSlider{}
      |> MyApp.Forms.AngleSlider.changeset_validate(params)
      |> Map.put(:action, :validate)

    {:noreply,
     assign(
       socket,
       :ecto_form,
       Phoenix.Component.to_form(changeset,
         action: :validate,
         as: :angle_slider_ecto,
         id: "angle-slider-live-form-ecto"
       )
     )}
  end

  def handle_event("save", %{"angle_slider_ecto" => params}, socket) do
    case MyApp.Forms.AngleSlider.changeset_validate(%MyApp.Forms.AngleSlider{}, params) do
      %Ecto.Changeset{valid?: true} = changeset ->
        _data = Ecto.Changeset.apply_changes(changeset)

        {:noreply,
         assign(
           socket,
           :ecto_form,
           Phoenix.Component.to_form(
             MyApp.Forms.AngleSlider.changeset_validate(%MyApp.Forms.AngleSlider{}, params),
             as: :angle_slider_ecto,
             id: "angle-slider-live-form-ecto"
           )
         )}

      changeset ->
        {:noreply,
         assign(
           socket,
           :ecto_form,
           Phoenix.Component.to_form(changeset,
             action: :insert,
             as: :angle_slider_ecto,
             id: "angle-slider-live-form-ecto"
           )
         )}
    end
  end
end

  

    defmodule MyApp.Forms.AngleSlider do
  use Ecto.Schema
  import Ecto.Changeset

  embedded_schema do
    field :angle, :float, default: 0.0
  end

  def changeset(form, attrs \\ %{}) do
    form
    |> cast(attrs, [:angle])
    |> validate_required([:angle])
  end

  def changeset_validate(form, attrs \\ %{}) do
    form
    |> cast(attrs, [:angle])
    |> validate_required([:angle])
    |> validate_number(:angle,
      greater_than_or_equal_to: 0.0,
      less_than_or_equal_to: 90.0,
      message: "must be between 0 and 90"
    )
  end
end