On Dec 30, 2009, at 3:59 PM, Henry McGilton (Boulevardier) wrote:
> I meant that rather than setting a timer and implementing a callback method
> and
> remembering to invalidate the timer, and so on and so on, you can do something
> like this (which took less time to implement than the time required to
> explain it . . . ):
>
> - (void)mouseDown:(NSEvent *)theEvent
> {
> NSLog(@"mouseDown");
> [self setStartStamp: [theEvent timestamp]];
> }
>
> - (void)mouseUp:(NSEvent *)theEvent
> {
> NSLog(@"mouseUp");
> NSTimeInterval endStamp = [theEvent timestamp];
> NSLog(@"time difference = %.2f", endStamp - [self startStamp]);
> }
>
> where startStamp is an instance variable that records the timestamp on
> mouse down.
> Then on mouse up, you grab the timestamp of the mouseUp's event and take the
> difference
> between the two timestamps . .
There is no mouse-up event. He wants to present a menu if there's been X time
since the mouse-down even when _no other events have arrived since then_.
There's no getting around using a timer of some sort.
Cheers,
Ken
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