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From: taylorj@yvax.byu.edu
Newsgroups: comp.sys.mac.hypercard
Subject: Re: selecting from a scrollable field
Message-ID: <1176taylorj@yvax.byu.edu>
Date: 16 Mar 90 03:52:34 GMT
Lines: 34


Yes, yes, I know lots of people posted their favorite script for selecting text
from a field, but they all suffered from bloated code or wouldn't work in all
cases.  Below is the "canonical" clickLine function that handles regular
fields, scrolling fields, and fields with wide margins:

  function clickLine
    put the clickV - the top of the target into lineV
    if the style of the target is "scrolling"
    then add the scroll of the target to lineV
    if the wideMargins of the target then subtract 4 from lineV
    return lineV div the textHeight of the target + 1
  end clickLine

You would use this in a locked field with a script something like

  on mouseUp
    select line clickLine() of me
  end mouseUp

or

  on mouseUp
    go to card clickLine()
    -- where cards are numbered to correspond to lines in the field
  end mouseUp


By the way, the "the"s in the script above make it run FASTER, not slower as
you might expect.


Jim Taylor
Microcomputer Support for Curriculum   |
Brigham Young University               |   Bitnet: taylorj@byuvax.bitnet
101 HRCB, Provo, UT  84602             |   Internet: taylorj@yvax.byu.edu