Whether the window is active.
The effect in use, after inherit is resolved and an effect the window cannot show falls back; system when the platform draws the frame.
Which variant was applied, matching active.
Id of the window; main for the main window.
Payload of the
window:backdropStateChangedevent. The backdrop of the main window or a popup changed: it was applied with another effect, switched between its active and inactive variant, or was applied again by a forced refresh. Sent only after the backdrop was applied successfully.