In Windows when desktop scaling was changed the tray icons was distorted/blurred a bit each time scaling changes.
With the proposed fix, the tray icon scales according to on-the-fly DPI scale settings. A test case has been added which adds a MRI icon to system tray, to observe the icon scaling when DPI is changed. Since the scale cannot be programmatically changed (for dynamic on-the-fly scale changes), I have used a manual test case to test this scenario. When DPI changes usually two messages are sent by windows - - [WM_DPICHANGED](https://docs.microsoft.com/en-us/windows/win32/hidpi/wm-dpichanged) - [WMPOSCHANGING](https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-windowposchanging) I'm triggering an update on tray icons on receiving WMPOSCHANGING msg through the Tray icon's Window Procedure. Triggering an update on WM_DPICHANGED was still causing the icons to be distorted, hence WMPOSCHANGING is being used as the message to trigger the update. ------------- Commit messages: - removed whitespaces error due to CRLF - removed whitespace error - added manual to test case - trayicon changes Changes: https://git.openjdk.java.net/jdk/pull/8441/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8441&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8255439 Stats: 177 lines in 5 files changed: 172 ins; 1 del; 4 mod Patch: https://git.openjdk.java.net/jdk/pull/8441.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8441/head:pull/8441 PR: https://git.openjdk.java.net/jdk/pull/8441
