[ChipGroup] Chip overflow indicator

Currently the ChipGroup supports the singleLine attribute with a HorizontalScrollView so that the chips will always fit in a scrollable list. Unfortunately for some use cases this behavior is not really nice.

For example if you have a list of filters that can be selected on an extra screen and will be displayed in a single line ChipGroup somewhere on the main screen. The user wouldn't really profit from a scrollable single line that will only support viewing the filters. Instead the ChipGroup should display all items till it reaches its space limit and display an indicator (like "...") that lets the user know that there are more filters set.

I'm trying to get this by calculating the container width and the childrens width to decide which chips to remove but it would be nice to have an overflow behavior attribute as a feature that will automatically do this by itself.

It could look like:

まず、ChipGroup の singleLine の動作と HorizontalScrollView の使用箇所を確認します。チップが利用可能な幅で止まり、追加のフィルターがあることを示すように、overflow 属性とインジケーターの動作を定義します。手動の幅計算に依存せず、要求された single-line のオーバーフロー表示が機能すれば完了です。