Peter Haworth wrote: > I can accept that the first click generates a mouseUp message but > the second click within the doubleUpInterval should generate a > mouseDoubleUp shouldn't it? That's what I consider to be a bug.
HyperCard (and apparently Flash in its default setup - interesting note, Colin) obviated the problem altogether by not providing any way to detect double clicks at all. Problem solved. :)
LiveCode (and SuperCard and a few other xTalks) do provide messages for both single and double-clicks, but like I said the only way to invoke an action on a double-click without invoking two single-click actions is to delay all single-click handling by the doubleClickInterval.
That's what Craig's handy handler does, but if that were the default behavior of the LiveCode engine I suspect it would annoy people who don't need that distinction.
Consider the Finder: imagine if you single-clicked on an object and it never hilited until more than 1/5th of a second had passed (the default doubleClickInterval is 200 ms). Sure, that's a short duration, but it would make the Finder feel subtly sluggish.
Fortunately this isn't an issue with the Finder: since single-clicks on file objects perform no action, it can faithfully display your selection immediately without delay, appearing snappy and responsive.
The need to invoke actions on both messages is such an edge case that I feel it's appropriate to expect scripters to script things for such specialized needs.
Feel free to submit it to the RQCC if you like, but don't be surprised if it gets flagged as "Not a bug" because the only "fix" would reduce the apparent responsiveness of all other apps.
-- Richard Gaskin Fourth World LiveCode training and consulting: http://www.fourthworld.com Webzine for LiveCode developers: http://www.LiveCodeJournal.com LiveCode Journal blog: http://LiveCodejournal.com/blog.irv _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
