On 13/03/2019 03:59, Sergey Malenkov wrote:
I missed the "for ALT keys" in the bug title and thought that
"KeyEvent.getModifiers() returns inconsistent values" was about
incompatible behaviour on different platforms. In fact, JDK-8218917
should be renamed to something like “The right Alt key on Mac should
behave as Alt and must not break the left Alt key processing”.

But the "right Alt" should behave like a "left alt" already, it should use both 
flags:
the common alt(ALT_DOWN_MASK) and the altGr(ALT_GRAPH_DOWN_MASK).

So if the client will follow the spec below it should work as before, isn't it?:
https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/java/awt/event/InputEvent.html#getModifiersEx()

On Wed, Mar 13, 2019 at 6:57 AM Sergey Bylokhov
<sergey.bylok...@oracle.com> wrote:

On 12/03/2019 12:28, Sergey Malenkov wrote:
Hi Sergey,

1. macOS uses a regular Alt key as "Alternate Character Key". This is
the reason why JDK Toolkit defines Ctrl+Alt to select a mnemonic,
instead of simple Alt. See
https://sites.google.com/site/malenkov/java/141229

Right, but introducing this flag for the "left alt" could cause even more
issues, so this flag is set only for the right.

3. Regression was caused by adding AltGr to key processing on Mac. But
I found more issues with inconsistent key processing on different
platforms. See http://sites.google.com/site/malenkov/java/190312

Not sure that CAPS_LOCK is related.



On Tue, Mar 12, 2019 at 4:17 AM Sergey Bylokhov
<sergey.bylok...@oracle.com> wrote:

On 11/03/2019 17:37, Philip Race wrote:
The debate is about AltGraph which an ancient MS-DOSism for
asking for an ALTernate GRAPHics bitmap font - all pre-dates windows
and I am sure has never been applicable to any MacOS.

It also about the "right alt" which is also know as "AltGraph". I guess 
currently
it is implemented as "right alt" on Linux/macOS/windows.

BTW on linux it is also named as "Alternative Characters Key":
https://help.ubuntu.com/community/ComposeKey

So someone needs to properly explain why we would claim a Mac keyboard
is OK to generate a keycode it doesn't have and cause a slew of regressions
in the process ...>
If Mac doesn't distinguish these two, we should generate the same keycode for 
both.

The macOS supports "right alt", otherwise it would not be possible to implement 
it in java:
https://developer.apple.com/library/archive/technotes/tn2450/_index.html


One could suppose there is a difference else why two keys, but what is the right
thing to do here  that fixes all the problems. What exactly WAS the problem
with what was there in the first place ? And if changing it is correct why is it
causing regressions ?

Regressions were caused by the bugs in the fix implementation, or am I missed 
something?



-phil.



On 3/12/19, 5:34 AM, Sergey Bylokhov wrote:
Hi, Phil.
On 11/03/2019 07:43, Philip Race wrote:
The reasoning that AltGraph might be useful to someone is a bit weak
and I don't think I'd want to support it via system property or build options.

If its not a platform keyboard key, why do we need it ?

The "AltGraph" key is also commonly referred to as "Right Alt", and
it has been implemented on all platforms as a "Right Alt", it is convenient to
distinguish the left/right alts.



--
Best regards, Sergey.





--
Best regards, Sergey.





--
Best regards, Sergey.

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