fastframe-macos

macOS window chrome for egui apps that draw their own header under a hidden title bar (with_fullsize_content_view(true), with_titlebar_shown(false)).

• align_traffic_lights(frame, ctx, header_height) centres the close, minimize and zoom buttons on the header’s centre line, in their usual columns. AppKit puts them back for its own 28-point bar during layout passes, so call it every frame (it changes nothing when they are in place). The height is in egui points and scales with zoom.
• traffic_light_inset(ctx) is the room to leave at the header’s left: 84 AppKit points (not zoomed), zero in full screen.
• double_click_action() reads System Settings, Desktop & Dock, “Double-click a window’s title bar to”: Zoom, Fill, Minimize or Nothing. The app performs it.

Off macOS everything compiles and does nothing (double_click_action answers Zoom, the inset is zero).

Usage

const HEADER_HEIGHT: f32 = 48.0;

fn logic(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
    fastframe_macos::align_traffic_lights(frame, ctx, HEADER_HEIGHT);
}

fn header(ui: &mut egui::Ui) {
    ui.add_space(fastframe_macos::traffic_light_inset(ui.ctx()));
    // ...
    if response.double_clicked() {
        match fastframe_macos::double_click_action() {
            DoubleClick::Zoom | DoubleClick::Fill => { /* toggle Maximized */ }
            DoubleClick::Minimize => { /* Minimized(true) */ }
            DoubleClick::Nothing => {}
        }
    }
}

Fill (and Maximize, its older name) is separate because AppKit performs it itself when the double-click starts a native window drag (ViewportCommand::StartDrag on mouse down, as Spotifast does). An app that starts dragging only after movement treats it like Zoom. A value the crate does not know does nothing.

Not here: application menus

ZapFast builds its macOS menu bar with muda and keeps it alive across window recreation; Spotifast builds its own with AppKit directly (plus a Touch Bar guard); Solco has none. They share too little to extract a menu model yet.

Unsafe code

The workspace forbids unsafe code. This crate lowers that to deny and allows it only in appkit.rs, each block with a safety note.