# MKCustomUI API

Use the `MKCustomUI` class and method reference when configuring or controlling a custom MKPlayer user interface.

## Constructor

- `new MKCustomUI(player)`: creates a UI builder using the MKPlayer instance and its internal Bitmovin engine.

## Default UI variants (classic style, return `UIManager`)

- `buildDefaultUI(config?)`: Builds the standard defauly UI for browser use.
- `buildDefaultSmallScreenUI(config?)`: Builds the default UI optimized for mobile and small screens.
- `buildDefaultTvUI(config?)`: Builds the default UI tailored for TV devices.
- `buildDefaultCastReceiverUI(config?)`: Builds the default UI for Chromecast receiver.

## Modern UI variants (return `UIManager`)

- `buildModernUI(config?)`: Builds the modern UI layout for general use.
- `buildModernSmallScreenUI(config?)`: Builds the modern UI layout for mobile and small screens.
- `buildModernTvUI(config?)`: Builds the modern UI layout for TV devices.
- `buildModernCastReceiverUI(config?)`: Builds the modern UI layout for Chromecast receiver.

## Fully custom UI (advanced, return `UIManager`)

- `customUi(uiContainer, config?)`: Attach a fully custom `UIContainer`.
- `customUiVariant(uiVariants, config?)`: Configure multiple responsive UI variants and switch by condition.

## UI container factory methods (no `UIManager` attachment)

- `modernUI(config)`: Creates a general modern UI container without attaching it to the player.
- `modernSmallScreenUI()`: Creates a modern UI container optimized for small screens.
- `modernCastReceiverUI()`: Creates a modern UI container structure for cast receivers.

## Ads-only UI container methods

- `modernAdsUI()`: Creates a modern ads-only UI container.
- `modernSmallScreenAdsUI()`: Creates a modern ads-only UI container optimized for small screens.
- `modernTvAdsUI()`: Creates a modern ads-only UI container tailored for TV devices.

## TV UI with spatial navigation (container only)

- `modernTvUI()`: Creates a modern TV UI container with spatial navigation support.