Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!tut.cis.ohio-state.edu!uc!nic.MR.NET!umn-cs!bungia!orbit!pnet51!pj
From: pj@pnet51.cts.com (Paul Jacoby)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: "Real" hypertext?
Message-ID: <722@orbit.UUCP>
Date: 30 Jun 89 01:45:16 GMT
Sender: root@orbit.UUCP
Organization: People-Net [pnet51], Minneapolis, MN.
Lines: 37

Greg, a slightly more elegant approach to selecting the text comes from Apple
itself, in a function called 'clickline()'.  See below:

-- the following function is from the "HyperCard 1.2.2 Release Notes"
-- stack
--function clickLine returns the line of the target field
--over which the mouse was clicked.  It allows 4 pixels under the
--baseline for the psychological effect of descenders.

function clickLine
  return ((the mouseV - item 2 of the rect of the target-4)B
  div the textheight of the target) + 1
end clickLine

NOTE: That "B" up there is a line continuation character.  This works really
well in a script like:

on mouseUp
  get clickline() -- find out where they clicked
  select line it of me -- select the text
  get the selection
  
  if it is empty then
  -- do whatever
  end if
  -- and do whatever else here with the selected text
end mouseUp

This script goes in the field itself, which needs to be in a 'locked text'
state to receive the mouseUp event.  

Paul
.-----------------------------------------------------------------------------.
| UUCP: {rosevax, crash, orator}!orbit!pnet51!pj |  Working with idiots keeps |
| ARPA: crash!orbit!pnet51!pj@nosc.mil           |  my life interesting...    |
| INET: pj@pnet51.cts.com                        |                            |
`-----------------------------------------------------------------------------'