SingleLineLinearLayout

SingleLineLinearLayout.kt

/**
 * Class describing a SingleLineLinearLayout
 */
open class SingleLineLinearLayout @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : LinearLayout(context, attrs, defStyleAttr) {

    var isChildRemoving = false

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec)

        if (!isChildRemoving) {
            // measure all children and get sum width
            var childWidthOccupied = children.sumBy {
                it.measure(widthMeasureSpec, heightMeasureSpec)
                it.measuredWidth + it.marginEnd
            }

            val parentWidth = measuredWidth

            if (childWidthOccupied > parentWidth) {
                isChildRemoving = true

                for (i in childCount - 1 downTo 0) {
                    val child = get(i)
                    val childWidthWithMargin = child.measuredWidth + child.marginEnd

                    if (childWidthOccupied <= parentWidth) {
                        isChildRemoving = false
                        break
                    }

                    childWidthOccupied -= childWidthWithMargin
                    removeViewAt(i)
                }
            }
        }
    }
}