align
The child's offset from the left of space, for a child size pixels wide in a container laid out under orientation.
Return
the offset in pixels, applied without clamping.
Parameters
size
the child's own width, which an alignment reads and never changes.
space
the width offered, which is not always the container's: an arrangement placing a group of children passes the width left over.
orientation
the container's reading order; a right-to-left one mirrors the placement, so Alignment.Start resolves to the right edge.