Struct WindowEnv 

pub struct WindowEnv {
    pub id: WindowId,
    pub custom_chrome: bool,
    pub maximized: bool,
    pub fullscreen: bool,
    pub always_on_top: bool,
    pub native_controls: Option<Rect>,
    pub backdrop: Backdrop,
}

What the host knows about its window, pushed into Env by the frame driver. Views (e.g. widgets::titlebar) read this to adapt: reserve space for native controls, pick the maximize/restore glyph, or render nothing at all under native decorations.

Fields

id: WindowId

Which window this core is drawing: the id the Open that created it carried, written here by the driver (MAIN for the launcher’s). A view reads it here rather than through a query, and it is what the core stamps onto every UiEvent it hands out — so a driver that pushes the rest of these facts has already said where its events came from. The window’s name is Core::window_name.

custom_chrome: bool

The host asked the app to draw its own chrome (no native titlebar).

maximized: bool

fullscreen: bool

always_on_top: bool

The window is above every other app’s: the level the driver set after the frame asked (Core::set_always_on_top), on a platform that has one. On Wayland there is no such call, so a driver reports false however often the app asks, which is why a pin button should draw its state from this field. It is the driver’s record of what it set, not a query: a level the OS dropped afterwards (a fullscreen space, a tiling manager) is not seen here.

native_controls: Option<Rect>

Area (logical px, window coords) covered by controls the OS still draws over our content — macOS traffic lights under custom chrome. Views keep out of it; None means the OS draws nothing over us.

backdrop: Backdrop

What is behind the window’s transparent pixels, as the driver got it — not as the app asked: a Blur asked of GNOME reads Tinted (the wallpaper, drawn by kui) or Opaque where no wallpaper could be read. A view that paints translucent regions over the backdrop paints them opaque when this is Opaque (backlog F126). Opaque by default and in a headless core.

Trait Implementations

impl Clone for WindowEnv

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for WindowEnv

impl Debug for WindowEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for WindowEnv

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for WindowEnv

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WindowEnv