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From: beard@ux1.lbl.gov (Patrick C Beard)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Double Clicking
Message-ID: <1967@helios.ee.lbl.gov>
Date: 23 Feb 89 18:33:53 GMT
References: <4452@hubcap.UUCP>
Sender: usenet@helios.ee.lbl.gov
Reply-To: beard@ux1.lbl.gov (Patrick C Beard)
Organization: Lawrence Berkeley Laboratory, Berkeley
Lines: 31

In article <4452@hubcap.UUCP> mikeoro@hubcap.UUCP (Michael K O'Rourke) writes:
>A couple months ago, someone posted some example code to detect a double click.
>I want to detect a double click in the title bar of a window.

The easiest way to detect a double click is to save the time of each mouse
down event in some variable, say lastClickTime.  To detect if the next click
should be interpreted as a double click, subtract this time from the time
of the next click and compare it to the result of  the GetDblTime() trap.

i.e.:

	long lastClickTime=0;
	.
	.
	.
	/* assume we've been keeping track of lastClickTime... */
	if(event.what==mouseDown) {
		if(event.when-lastClickTime<=GetDblTime()) {
			ProcessDoubleClicks();
			lastClickTime=0;	/* reset it */
		} else
			lastClickTime=event.when;
	}

Hope that helps.

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