Struct ResponsiveLayout 

pub struct ResponsiveLayout { /* private fields */ }

A breakpoint-aware layout that switches Flex configuration at different terminal widths.

Wraps Responsive<Flex> with auto-detection of breakpoints from area width. Each breakpoint tier can define a completely different layout (direction, constraints, gaps, margins).

Implementations

impl ResponsiveLayout

pub fn new(base: Flex) -> Self

Create a responsive layout with a base layout for Xs.

All larger breakpoints inherit this layout until explicitly overridden.

pub fn at(self, bp: Breakpoint, layout: Flex) -> Self

Set the layout for a specific breakpoint (builder pattern).

pub fn with_breakpoints(self, breakpoints: Breakpoints) -> Self

Override the breakpoint thresholds (builder pattern).

Defaults to Breakpoints::DEFAULT (60/90/120/160).

pub fn set(&mut self, bp: Breakpoint, layout: Flex)

Set the layout for a specific breakpoint (mutating).

pub fn clear(&mut self, bp: Breakpoint)

Clear the override for a specific breakpoint, reverting to inheritance.

Clearing Xs is a no-op.

impl ResponsiveLayout

pub fn split(&self, area: Rect) -> ResponsiveSplit

Split the area using auto-detected breakpoint from width.

Classifies area.width into a Breakpoint, resolves the corresponding Flex, and splits the area.

pub fn split_for(&self, bp: Breakpoint, area: Rect) -> ResponsiveSplit

Split the area using an explicit breakpoint.

Use this when you already know the active breakpoint (e.g., from a shared app-level breakpoint state).

pub fn classify(&self, width: u16) -> Breakpoint

Get the active breakpoint for a given width.

pub fn layout_for(&self, bp: Breakpoint) -> &Flex

Get the Flex configuration for a given breakpoint.

pub fn has_explicit(&self, bp: Breakpoint) -> bool

Whether a specific breakpoint has an explicit (non-inherited) layout.

pub fn breakpoints(&self) -> Breakpoints

Get the breakpoint thresholds.

pub fn constraint_count(&self, bp: Breakpoint) -> usize

Number of rects that would be produced for a given breakpoint.

Useful for pre-allocating or checking layout changes without performing the full split.

pub fn detect_transition( &self, old_width: u16, new_width: u16, ) -> Option<(Breakpoint, Breakpoint)>

Check if a width change would cause a breakpoint transition.

Returns Some((old, new)) if the breakpoint changed, None otherwise.

Trait Implementations

impl Clone for ResponsiveLayout

fn clone(&self) -> ResponsiveLayout

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResponsiveLayout

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

Formats the value using the given formatter.