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From: shakes@athena.mit.edu (Sue Downing)
Newsgroups: comp.windows.x
Subject: Double Mouseclicks and XImage buffer size
Message-ID: <1991Mar9.230605.21162@athena.mit.edu>
Date: 9 Mar 91 23:06:05 GMT
Sender: news@athena.mit.edu (News system)
Organization: MIT
Lines: 26



I am repeating these questions for a friend of mine who doesn't have
access to netnews.  Could you please forward your answers to:
	bj@oak.com (uunet!oak!bj)

Thanks.
-------

I have two questions:

1) How can I detect double mouse clicks in a portable way?  I have
  written a loop that sleeps for a small period of time and then checks
  the event queue.  After the double-mouse-click interval has passed
  (and no events are detected) I note a single mouse click.  Is there
  a readevent with timeout?  Or is there a way to ask the server to send
  a "timer" event at a future time?

2) What is the best way to determine the size of the image data that
  needs to be allocated for an XImage?  XCreateImage notes that it does
  not allocate space for the image itself.  Is there a portable method
  to determine the number of bytes needed?  XGetImage knows how to do this.

Thanks a bunch.
--Bjoren Davis
(bj@oak.com or uunet!oak!bj)