I can’t speak to the Apple Magic Mouse specifically, but at my old job
we wrote a work-around
<https://github.com/mickleness/pumpernickel/blob/master/src/main/java/com/pump/awt/ClickSensitivityControl.java>
for a very similar-sounding complaint: we received MOUSE_PRESSED and
MOUSE_RELEASED events just fine, but we didn’t receive MOUSE_CLICKED
events unless the mouse location stayed exactly the same.
This came up because some of our users were kindergarteners, and they
often lacked the fine motor schools to tap touchpads in exactly the same
spot.
IMO I’d also consider these complaints bugs, but I’m not an OpenJDK
member and I certainly don’t have the historical knowledge that some
people here might have about whether this is intentional or not. I’m
curious to see what other folks say…?
Regards,
- Jeremy
------ Original Message ------
From "Laird Nelson" <ljnel...@gmail.com>
To client-libs-dev@openjdk.org
Date 6/23/2025 10:03:06 PM
Subject "Smudge" factor on Mac OSX mouse events?
(Disclaimer: I happen to work for Oracle but this has nothing to do
with my job.)
I have been having trouble double-clicking things with my Apple Magic
Mouse on my M1 Mac when running (Swing-based) Netbeans (see
https://github.com/apache/netbeans/issues/8609 and the inciting
discussion at https://github.com/apache/netbeans/discussions/8580). I
noticed that perhaps (?) this is due to the lack of a "smudge factor"
correcting for inadvertent tiny mouse motion events while double
clicking. It seems, perhaps, that the Magic Mouse is very finicky in
this area where the built-in Mac trackpad is not.
At any rate, the XWindows toolkit has this:
https://github.com/openjdk/jdk/blob/master/src/java.desktop/unix/classes/sun/awt/X11/XWindow.java#L71-L75
But perhaps (?) the analogous Mac OSX area does not:
https://github.com/openjdk/jdk/blob/master/src/java.desktop/macosx/classes/sun/lwawt/macosx/CPlatformResponder.java#L71-L79
and it seems like this might result in the observed behavior.
Is this a bug or works-as-it-does?
Best,
Laird
