line-location

Given a line number, returns the graphic location of the line. Lines are numbered starting with 0.

The result is only valid when the buffer is viewed (see Basic Organization). Calling this method may force the recalculation of location information, even if the buffer currently has delayed refreshing (see refresh-delayed?).

• (send a-wx:media-edit line-location line top?) -> inexact real
      line : small integer
      top? = #t : boolean

  If top? is not #f, the location for the top of the line is returned; otherwise, the the location for the bottom of the line is returned.