8374506: Incorrect positioning of arrow icon in parent JMenu in Windows L&F

[rm-gh-8]

Backporting JDK-8374506: Incorrect positioning of arrow icon in parent JMenu in Windows L&F.

This PR fixes the submenu arrow icon overlapping with long menu text in Windows L&F by adding a gap for the arrow icon rect, though reviewers note it's a stopgap solution and the underlying menu width calculation issue remains unaddressed.

For parity with Oracle JDK.

Ran related tests on windows-x64:

../jtreg/build/images/jtreg/bin/jtreg -jdk build/windows-x86_64-server-fastdebug/images/jdk -m test/jdk/javax/swing/JMenuItem/LargeMenuTextArrowIconPosition.java

Screenshot:

Results:

Success

LargeMenuTextArrowIconPosition.jtr.log

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8374506 needs maintainer approval

Issue

• JDK-8374506: Incorrect positioning of arrow icon in parent JMenu in Windows L&F (Bug - P3 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/311/head:pull/311
$ git checkout pull/311

Update a local copy of the PR:
$ git checkout pull/311
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/311/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 311

View PR using the GUI difftool:
$ git pr show -t 311

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/311.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @rm-gh-8 This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (169b89f1)

[rm-gh-8]

/approval request for backport of JDK-8374506: Incorrect positioning of arrow icon in parent JMenu in Windows L&F.

This PR fixes the submenu arrow icon overlapping with long menu text in Windows L&F by adding a gap for the arrow icon rect, though reviewers note it's a stopgap solution and the underlying menu width calculation issue remains unaddressed.

For parity with Oracle JDK.

Low-Medium Risk - It's a Windows-only visual fix for a specific layout issue, but it's acknowledged as a temporary
workaround that doesn't address the root cause of cramped menu layouts, potentially requiring future rework.

[openjdk]

@rm-gh-8
8374506: The approval request has been created successfully.