Integrated: JDK-8255439: System Tray icons get corrupted when windows scaling changes

[Harshitha Onkar]

On Thu, 28 Apr 2022 02:26:28 GMT, Harshitha Onkar <duke at openjdk.java.net> wrote:

> In Windows, when desktop scaling is 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.

This pull request has now been integrated.

Changeset: 8323787c
Author:    Harshitha Onkar <harshitha.onkar at oracle.com>
Committer: Alexey Ivanov <aivanov at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/8323787c07ced4fa8ce852995df4c0e2de4d7ccc
Stats:     166 lines in 3 files changed: 164 ins; 0 del; 2 mod

8255439: System Tray icons get corrupted when windows scaling changes

Co-authored-by: Alexey Ivanov <aivanov at openjdk.org>
Reviewed-by: kcr, prr, aivanov

-------------

PR: https://git.openjdk.java.net/jdk/pull/8441