Implement support for application status indicators (tray icons).

[bruvzg]

Partially implements godotengine/godot-proposals#2349

Adds support for tray icons and handling click events on it.

• Windows
• macOS
• Linux (org.freedesktop.StatusNotifierItem/org.kde.StatusNotifierItem on D-BUS) Interface seems to be tied to specific GUI kit menus and external icon resources, so will keep it Windows/macOS only for now.

[Calinou]

Great work 🙂

I suppose this will need the ability to define native menus for the tray, similar to the global menu implementation on macOS. Supporting a list of options to choose from is probably sufficient for an initial implementation.

Adds support for tray icons and handling click events on it.

Could separate middle/right-click/mouse wheel actions be supported on tray icons? I believe this is only possible on Windows and Linux though.

For instance, some music players allow middle-clicking their tray icon to play/pause the current track (or using the mouse wheel on the tray icon to change volume).

[scgm0]

Is this pr still going on?

[bruvzg]

I suppose this will need the ability to define native menus for the tray, similar to the global menu implementation on macOS. Supporting a list of options to choose from is probably sufficient for an initial implementation.

Currently, it's only detecting clicks, and passing display coordinates to the callback function, which can be used to show Godot menu (if window embedding is disabled) or any other window. But I guess native menu support might be necessary (at least for Linux implementation), but probably as a separate PR, since it might be useful for context menus in general.

Could separate middle/right-click/mouse wheel actions be supported on tray icons? I believe this is only possible on Windows and Linux though.

It is detecting left/middle/right (but not scroll wheel or other buttons), button index is passed to the same callback.

[akien-mga]

Looks good to me. Sounds like a nice feature to have for non-game apps, or specific game needs.

[akien-mga]

Thanks!