on-insert

Called before a given range is inserted into the buffer. If the return value is #f, then the insert will be aborted. Otherwise, after-insert is guaranteed to be called after the insert has completed.

The buffer is internally locked for writing during a call to this method (see also Locks). Use after-insert to modify the buffer, if necessary.

See also on-edit-sequence.

• (send a-wx:media-edit on-insert start len) -> boolean
      start : small integer
      len : small integer