Segmented Progress _RTL

segmented_progress_rtl.kt

private fun DrawScope.drawSegments(
    progress: Float,
    color: Color,
    segmentHeight: Float,
    segments: Int,
    segmentGap: Float,
) {
    val width = size.width
    val gaps = (segments - 1) * segmentGap
    val segmentWidth = (width - gaps) / segments
    val barsWidth = segmentWidth * segments
    val start: Float
    val end: Float

    // 1
    val isLtr = layoutDirection == LayoutDirection.Ltr
    // 2
    if (isLtr) {
        start = 0f
        end = barsWidth * progress + (progress * segments).toInt() * segmentGap
    } else {
        start = width
        end = (width - (barsWidth * progress + (progress * (segments - 1)).toInt() * segmentGap))
    }

    repeat(segments) { index ->
        val offset = index * (segmentWidth + segmentGap)
        val segmentStart: Float
        val segmentEnd: Float
        // 3
        if (isLtr) {
            segmentStart = start + offset
            segmentEnd = (segmentStart + segmentWidth).coerceAtMost(end)
        } else {
            segmentEnd = width - offset
            segmentStart = (segmentEnd - segmentWidth).coerceAtLeast(end)
        }
        // 4
        if (isLtr && offset <= end || !isLtr && segmentEnd > end) {
            drawRect(
                color,
                Offset(segmentStart, 0f),
                Size(segmentEnd - segmentStart, segmentHeight)
            )
        }
    }
}