Path: utzoo!dciem!mmt
From: mmt@dciem.UUCP (Martin Taylor)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: How to trap double-clicks?
Message-ID: <2695@dciem.UUCP>
Date: 25 Mar 88 23:23:56 GMT
Article-I.D.: dciem.2695
Posted: Fri Mar 25 18:23:56 1988
References: <7744@oberon.USC.EDU>
Reply-To: mmt@dciem.UUCP (Martin Taylor)
Organization: D.C.I.E.M., Toronto, Canada
Lines: 28
Summary: 


:Does anyone know of a simple routine for handling or trapping
:for double-clicks.
:
:I have written a button script as follows:
:
:on mouseUp
:  Set the highlight of me to not the highlight of me
:end mouseUp
:
:When I double click on it quickly, it misses the second click, and
:only changes once.  I can't wait in the button for a second click, 
:because I need to check in other buttons for clicks during the same time.
:
I posted an item on this some months ago, and got absolutely no response.
My attempt was to make a generic double-click handler, using the ticks
between clicks as the criterion for whether there were two clicks or
a double click.  It works fine EXCEPT IN BUTTONS (card buttons only? I
forget).  In buttons, a second click within about 20 ticks (I forget
the exact number) is missed entirely.  I did a lot of experiments with
this.  I hope it is fixed in Version 1.1 of HyperCard.
-- 

Martin Taylor
...uunet!dciem!mmt
mmt@zorac.arpa
Talk, n. To commit an indiscretion without temptation, from an impulse
without purpose. (Ambrose Bierce, 1842-1914?, The Devil's Dictionary)