support windows visibility events

[i10416]

I temporarily named event as EventWindowAppear/Disappear, but I think there would be better candidates.

Which do you think is better for visibility event name?

• EventWindowShow/Hidden
• EventWindowAppear/Disappear
• EventWindowVisibilityOn/Off
• EventWindowVisible/Invisible
• other

JWM notifies when window's visibility changes. In Windows, visibility is based mainly on WS_VISIBLE property and updated by ShowWindow function and ShowOwnedPopups function.

see

• https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/winmsg/window-features.md#window-visibility
• https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-showwindow

[tonsky]

How does it relate to minimize/maximize/restore (we already have those)? Minimize == hidden? Restore == visible? Or is there a subtle difference?

[i10416]

How does it relate to minimize/maximize/restore (we already have those)? Minimize == hidden? Restore == visible? Or is there a subtle difference?

It is not related to actual window visibility. It reacts to ShowWindow function and ShowOwnedPopups function, but does not react to manually resizing(hiding) window🤔