find-position-in-line

Given a graphical location within a line of the editor, returns the item editor position at that location. Lines are numbered starting with 0.

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

• (send a-text find-position-in-line line x at-eol? on-it? edge-close?) -> exact non-negative integer
      line : exact non-negative integer
      x : real number
      at-eol? = #f : boxed boolean or #f
      on-it? = #f : boxed boolean or #f
      edge-close? = #f : boxed real number or #f

  See End of Line for a discussion of the at-eol? argument. The on-it? box is filled with #t if the line actually touches this position, or #f otherwise, unless on-it? is #f.

  See find-position for a discussion of edge-close?.