On Wed, 7 Jun 2023 19:05:56 GMT, Harshitha Onkar <[email protected]> wrote:
> There are two scenarios related to tray icon distortion. > > 1. Single Screen - when DPI / Scale is changed on the fly - this was resolved > as part of [PR#8441](https://github.com/openjdk/jdk/pull/8441) > > 2. Multi Screen - when screens are set to different scales and the primary > display is toggled. This is a variation of scenario one. > > Earlier Windows msg - > [WM_DPICHANGED](https://learn.microsoft.com/en-us/windows/win32/hidpi/wm-dpichanged) > was used to set `m_bDPIChanged` which is used within > `AwtTrayIcon::WmTaskbarCreated()` to update the tray icons. This message is > sent when window DPI changes. WM_DPICHANGED msg is not received when taskbar > switches to primary display under multiple screen scenario, hence the tray > icon was still seen distorted in case 2. > > As > [WM_DISPLAYCHANGE](https://learn.microsoft.com/en-us/windows/win32/gdi/wm-displaychange) > is received in both cases, it is used as the new message to update > `m_bDPIChanged`. This message also works when the main display monitor gets > disconnected accidently making the other display the primary display. > > TrayIconScalingTest's instructions have been updated to include both the > cases described above. Marked as reviewed by aivanov (Reviewer). ------------- PR Review: https://git.openjdk.org/jdk/pull/14368#pullrequestreview-1471704243
