# `Plushie.Widget.KeyedColumn`
[🔗](https://github.com/plushie-ui/plushie-elixir/blob/v0.7.2/lib/plushie/widget/keyed_column.ex#L1)

Keyed column layout, arranges children vertically with stable identity keys.

Like `Column`, but uses each child's `id` as a key for iced's internal
widget diffing. This avoids unnecessary rebuilds when items are added,
removed, or reordered in dynamic lists.

## Props

| Name | Type | Default | Description |
|------|------|---------|-------------|
| `spacing` | `number()` | `nil` | Vertical space between children in pixels. Default: 0. |
| `padding` | `number() \| {number(), number()} \| %Plushie.Type.Padding{}` | `nil` | Padding inside the column. |
| `width` | `:fill \| :shrink \| {:fill_portion, pos_integer()} \| number()` | `nil` | Column width. Default: shrink. |
| `height` | `:fill \| :shrink \| {:fill_portion, pos_integer()} \| number()` | `nil` | Column height. Default: shrink. |
| `align_x` | `:left \| :center \| :right \| :top \| :bottom` | `nil` | Horizontal alignment of children: `:left`, `:center`, `:right`. |
| `max_width` | `number()` | `nil` | Maximum width in pixels. |
| `event_rate` | `integer()` | `nil` | Max events per second for coalescable events. |
| `a11y` | `%Plushie.Type.A11y{} \| map() \| keyword()` | `nil` | Accessibility annotations. |

# `option`

```elixir
@type option() ::
  (((((({:spacing, number()}
        | {:padding,
           number()
           | {number(), number()}
           | %Plushie.Type.Padding{
               bottom: term(),
               left: term(),
               right: term(),
               top: term()
             }})
       | {:width, :fill | :shrink | {:fill_portion, pos_integer()} | number()})
      | {:height, :fill | :shrink | {:fill_portion, pos_integer()} | number()})
     | {:align_x, :left | :center | :right | :top | :bottom})
    | {:max_width, number()})
   | {:event_rate, integer()})
  | {:a11y,
     %Plushie.Type.A11y{
       active_descendant: term(),
       busy: term(),
       described_by: term(),
       description: term(),
       disabled: term(),
       error_message: term(),
       expanded: term(),
       has_popup: term(),
       hidden: term(),
       invalid: term(),
       label: term(),
       label_from: term(),
       labelled_by: term(),
       level: term(),
       live: term(),
       mnemonic: term(),
       modal: term(),
       orientation: term(),
       position_in_set: term(),
       radio_group: term(),
       read_only: term(),
       required: term(),
       role: term(),
       selected: term(),
       size_of_set: term(),
       toggled: term(),
       value: term()
     }
     | map()
     | keyword()}
```

# `t`

```elixir
@type t() :: %Plushie.Widget.KeyedColumn{
  a11y:
    (%Plushie.Type.A11y{
       active_descendant: term(),
       busy: term(),
       described_by: term(),
       description: term(),
       disabled: term(),
       error_message: term(),
       expanded: term(),
       has_popup: term(),
       hidden: term(),
       invalid: term(),
       label: term(),
       label_from: term(),
       labelled_by: term(),
       level: term(),
       live: term(),
       mnemonic: term(),
       modal: term(),
       orientation: term(),
       position_in_set: term(),
       radio_group: term(),
       read_only: term(),
       required: term(),
       role: term(),
       selected: term(),
       size_of_set: term(),
       toggled: term(),
       value: term()
     }
     | map()
     | keyword())
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  align_x:
    (:left | :center | :right | :top | :bottom)
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  children: [Plushie.Widget.ui_node()],
  event_rate:
    integer()
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  height:
    (:fill | :shrink | {:fill_portion, pos_integer()} | number())
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  id: String.t(),
  max_width:
    number()
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  padding:
    (number()
     | {number(), number()}
     | %Plushie.Type.Padding{
         bottom: term(),
         left: term(),
         right: term(),
         top: term()
       })
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  spacing:
    number()
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil,
  width:
    (:fill | :shrink | {:fill_portion, pos_integer()} | number())
    | Plushie.Animation.Transition.t()
    | Plushie.Animation.Spring.t()
    | Plushie.Animation.Sequence.t()
    | nil
}
```

# `a11y`

```elixir
@spec a11y(
  widget :: t(),
  value ::
    (%Plushie.Type.A11y{
       active_descendant: term(),
       busy: term(),
       described_by: term(),
       description: term(),
       disabled: term(),
       error_message: term(),
       expanded: term(),
       has_popup: term(),
       hidden: term(),
       invalid: term(),
       label: term(),
       label_from: term(),
       labelled_by: term(),
       level: term(),
       live: term(),
       mnemonic: term(),
       modal: term(),
       orientation: term(),
       position_in_set: term(),
       radio_group: term(),
       read_only: term(),
       required: term(),
       role: term(),
       selected: term(),
       size_of_set: term(),
       toggled: term(),
       value: term()
     }
     | map()
     | keyword())
    | nil
) :: t()
```

Accessibility annotations.

Accepts `%Plushie.Type.A11y{} | map() | keyword()`.

# `align_x`

```elixir
@spec align_x(
  widget :: t(),
  value :: (:left | :center | :right | :top | :bottom) | nil
) :: t()
```

Horizontal alignment of children: `:left`, `:center`, `:right`.

Accepts `:left | :center | :right | :top | :bottom`.

# `build`

```elixir
@spec build(widget :: t()) :: Plushie.Widget.ui_node()
```

Converts this widget struct to a `ui_node()` map.

# `event_rate`

```elixir
@spec event_rate(widget :: t(), value :: integer() | nil) :: t()
```

Max events per second for coalescable events.

Accepts `integer()`.

# `extend`

```elixir
@spec extend(widget :: t(), children :: [Plushie.Widget.child()]) :: t()
```

Appends multiple children to the widget.

# `height`

```elixir
@spec height(
  widget :: t(),
  value :: (:fill | :shrink | {:fill_portion, pos_integer()} | number()) | nil
) :: t()
```

Column height. Default: shrink.

Accepts `:fill | :shrink | {:fill_portion, pos_integer()} | number()`.

# `keyed_column`
*macro* 

Creates a `:keyed_column` widget.

Shorthand for `new/2`. Import this macro to use the widget name
directly in view functions:

    import Plushie.Widget.KeyedColumn, only: [keyed_column: 2]

    keyed_column("my-id", prop: value)

# `max_width`

```elixir
@spec max_width(widget :: t(), value :: number() | nil) :: t()
```

Maximum width in pixels.

Accepts `number()`.

# `new`

```elixir
@spec new(id :: String.t(), opts :: [option()]) :: t()
```

Creates a new widget struct with the given ID and keyword options.

# `padding`

```elixir
@spec padding(
  widget :: t(),
  value ::
    (number()
     | {number(), number()}
     | %Plushie.Type.Padding{
         bottom: term(),
         left: term(),
         right: term(),
         top: term()
       })
    | nil
) :: t()
```

Padding inside the column.

Accepts `number() | {number(), number()} | %Plushie.Type.Padding{}`.

# `push`

```elixir
@spec push(widget :: t(), child :: Plushie.Widget.child()) :: t()
```

Appends a child to the widget.

# `spacing`

```elixir
@spec spacing(widget :: t(), value :: number() | nil) :: t()
```

Vertical space between children in pixels. Default: 0.

Accepts `number()`.

# `width`

```elixir
@spec width(
  widget :: t(),
  value :: (:fill | :shrink | {:fill_portion, pos_integer()} | number()) | nil
) ::
  t()
```

Column width. Default: shrink.

Accepts `:fill | :shrink | {:fill_portion, pos_integer()} | number()`.

# `with_options`

```elixir
@spec with_options(widget :: t(), opts :: [option()]) :: t()
```

Applies keyword options to an existing widget struct.

---

*Consult [api-reference.md](api-reference.md) for complete listing*
