On Sat, 23 Jan 2021 15:40:04 GMT, Kevin Rushforth <[email protected]> wrote:
> The JavaFX API does not provide a way to get the state of CAPS LOCK or NUM
> LOCK on the keyboard. Being able to read the lock state would allow an
> application to inform the user that caps lock was enabled for passwords or
> other usages where the keyboard input might not be echoed. It would also
> allow an application to do spell checking / auto-correction that might
> ordinarily be skipped when typing all upper-case letters.
>
> We need an equivalent JavaFX API to the existing AWT
> `java.awt.ToolKit::getLockingKeyState` method. A natural place to put this in
> JavaFX is in the `javafx.application.Platform` class, so we propose to create
> a new `Platform::isKeyLocked` method, which will take a `KeyCode` -- either
> `CAPS` or `NUM_LOCK` -- and return an `Optional<Boolean>` indicating whether
> or not that key is in the locked or "on" state. If we can't read the key
> state on a particular platform, we will return `Optional.empty()`, rather
> than throwing a runtime exception as AWT does.
>
> I have provided both an automated Robot test and a manual test. The latter is
> needed primarily because we can't set the CAPS lock on Mac using Robot, but
> also because we want way to test the case where the user has enabled CAPS
> lock before the program starts.
modules/javafx.graphics/src/main/java/javafx/application/Platform.java line 345:
> 343: * This method must be called on the JavaFX Application thread.
> 344: *
> 345: * @param keyCode the KeyCode of the lock state to query
`{@code KeyCode}`
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PR: https://git.openjdk.java.net/jfx/pull/385
