So why is it inevitable that I always send these emails and then have a brainstorm. I realized I could catch kEventMouseMoved at the application level and then just check if kEventParamWindowRef is my window or not.
Sorry for the noise,
Matthew
From: carbon-dev-bounces+mdouglass=email@hidden [mailto:carbon-dev-bounces+mdouglass=email@hidden] On Behalf Of Matthew Douglass
Sent: Friday, March 09, 2007 10:36 AM
To: email@hidden
Subject: How to get a kEventMouseExited at the edge of a window
kEventWindowCursorChange
Hey all,
First a word of warning, though I’ve been programming for Windows for quite some time, I’m very new to OS X. So if my question is obvious, I apologize.
My goal is to get a notification when the mouse leaves my window content region (in 10.3+). I saw kEventMouseExited and decided to try to use that. I added a call to CreateMouseTrackingRegion, passing in the region returned by GetWindowRegion(kWindowContentRegion) and kMouseTrackingOptionsGlobalClip. But even after realizing I needed to call SetMouseTrackingRegionEnabled(true), I still never get any events.
As an experiment, I created a Rect slightly smaller than the size of my window (about 10 pixels on each side) and passed that in to CreateMouseTrackingRegion with kMouseTrackingOptionsLocalClip. After doing that I started to get kEventMouseExited events. However, I noticed that if I moved the mouse very quickly (fast enough that I don’t get mouse moved events inside that 10 pixel boundary), then I don’t get kEventMouseExited.
As another failed experiment (based on something I saw in google) I tried catching kEventWindowCursorChange in my application event handler, but that too didn’t catch mouse moves that weren’t over my window.
So I need some way to get a notification when the mouse is leaving the content region of my window – what other options are there?
Thanks,
Matthew
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