Hi David,
David Guthrie schrieb:
> Hi,
>
> I'm having an issue which with warping the mouse pointer on Mac OS X that is
> generally expected, but behaves differently than on other platforms.
>
> That is, when you warp the mouse pointer using either of the warp functions
> (GraphicsWindowCarbon uses CGDisplayMoveCursorToPoint), all input is frozen
> for 0.25 seconds. When trying to implement a mouse look style mouse
> movement, the normal method is to move the mouse pointer back to the center
> of the screen even frame on other platforms, but doing this blocks all input
> in OS X for a quarter second unless I call
>
> CGSetLocalEventsSuppressionInterval(0);
>
> The other method is to disassociate the mouse pointer position from the mouse
> movement, but that solution won't work with the current osx window classes
> because they track the mouse position, not its movement.
>
> I was going to submit a change adding the above line to GraphicsWindowCarbon,
> and possible the Cocoa version, but it appears that this function is
> deprecated in 10.6 in favor of
>
> CGEventSourceSetLocalEventsSuppressionInterval(...);
>
>
> So, to conclude, I have two points to this post.
>
> 1. I think we should make this the default behavior so it will work the same
> across platforms, unless there is another solution
>
> 2. I don't know how to implement this using the other function because I'm
> not an expert on event sources, and I haven't really been able to make it
> work. Does anyone more skilled than I in this area know how to make this
> work or do you recommend I just use the older function for now?
There's really no documentation about using
CGEventSourceSetLocalEventsSuppressionInterval correctly.
I tried something along these lines, but it didn't work.
CGEventSourceRef event_source_ref =
CGEventSourceCreate(kCGEventSourceStateCombinedSessionState);
CGEventSourceSetLocalEventsSuppressionInterval(event_source_ref, 0.0);
CFRelease(event_source_ref);
So I think it's best we use the deprecated call to
CGSetLocalEventsSuppressionInterval. The carbon implementation is full
of deprecated calls :)
cheers,
Stephan
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