Detecting if a window (or frame) is full screen or not?

[barries]

I'm starting with the eframe_template app for a native app for Linux and Windows, and trying to make F11 toggle fullscreen / not full screen. How can I detect whether it is in fullscreen mode, so I can toggle it?

I've tried frame.info().window_info.fullscreen based on an old answer, but IntegrationInfo doesn't have a window_info field, and looking through the docs, I wasn't able to find how to get it.

Thanks!

[KatchaVlad]

I access the viewport state to get that information, I don't know if there is a cleaner way :
ui.input(|i| i.viewport().fullscreen)

[rustbasic]

The method mentioned above is correct.

let fullscreen = ui.input(|i| i.viewport().fullscreen.unwrap_or(false));
let fullscreen = ui.ctx().input(|i| i.viewport().fullscreen.unwrap_or(false));
let fullscreen = ctx.input(|i| i.viewport().fullscreen.unwrap_or(false));

[barries]

Thanks! Here's what I ended up with

if let Some(new_fullscreen) = ctx.input(|i| {
    if i.key_pressed(Key::F11) {
        Some(!i.viewport().fullscreen.unwrap_or(false))
    } else {
        None
    }
}) {
    ctx.send_viewport_cmd(egui::ViewportCommand::Fullscreen(new_fullscreen));
}

The only remaining bug is that egui still renders its window decorations in full screen mode.

[barries]

Ok, removing the decorations "by handle" fixed it.

if let Some(new_fullscreen) = ctx.input(|i| {
    if i.key_pressed(Key::F11) { Some(!i.viewport().fullscreen.unwrap_or(false)) }
    else                       { None                                            }
}) {
    ctx.send_viewport_cmd(egui::ViewportCommand::Fullscreen(  new_fullscreen));
    ctx.send_viewport_cmd(egui::ViewportCommand::Decorations(!new_fullscreen));
}