Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!jdevoto
From: jdevoto@Apple.COM (Jeanne A. E. DeVoto)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Clicking on Fields
Summary: the selectedLine, the clickLine
Message-ID: <47341@apple.Apple.COM>
Date: 13 Dec 90 10:27:41 GMT
References: <195@anaxagoras.ils.nwu.edu>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 41

In article <195@anaxagoras.ils.nwu.edu> korcuska@plato (Michael Korcuska)
writes:
>  [ . . ]   we have a field which, according to hypercard, has 3 lines
>but occupies 4 or 5 physical lines on the screen. How can we find out which
>of the 3 lines was clicked?

Assuming the field is locked, in HyperCard 1.2.2 or 1.2.5:

  on mouseDown
    set the lockText of the target to false
    click at the clickLoc
    get word 2 of the selectedLine -- the line number clicked on
    set the lockText of the target to true
    -- do something with the line number
  end mouseDown

In HyperCard 2.0:

  on mouseDown
    get word 2 of the clickLine -- the number of the line clicked on
    -- do something with the line number
  end mouseDown

If the field is not locked, generally an idle handler at the card level
or higher works best:

  on idle
    global lastLineClicked
    if the selectedLine is lastLineClicked then pass idle -- hasn't changed
    put the selectedLine into lastLineClicked
    if the selectedField is "card field 1" then
      -- do something with the line number -- word 2 of the selectedLine
    end if
  end idle
-- 
========= jeanne a. e. devoto ========================================
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