Struct EditorScale 

pub struct EditorScale { /* private fields */ }

Implementations

impl EditorScale

pub fn new(initial: f64) -> Self

Construct with an initial scale. Non-finite or non-positive values clamp to 1.0 so callers never have to defend against 0.0 * size collapsing the surface.

pub fn get(&self) -> f64

Read the current scale.

pub fn get_f32(&self) -> f32

Read the current scale, narrowed to f32 for renderer / DSP use. Display scales never exceed 4.0 in practice, so the f64 → f32 narrowing is invisible.

pub fn set(&self, scale: f64)

Update the current scale. Non-finite or non-positive values are silently dropped - callers are forwarding numbers from hosts / info.scale() where a bad value is a host bug, not something to propagate into the surface config.

pub fn take_change(&self, last: &mut f32) -> Option<f32>

Pick up a host-driven scale change since the last frame.

Reads the current scale (narrowed to f32) and compares it bit-identically against last. When the value moved, updates last and returns Some(cur); otherwise returns None.

Used by every editor backend’s per-frame loop to gate surface / renderer reconfiguration on actual host scale events. Bit-equality is the correct semantics - the cell is written verbatim from host callbacks, never through accumulating arithmetic, so an epsilon-based check would either thrash on noise (there is none) or miss a legitimate 1.0 → 1.0001 host signal.

Trait Implementations

impl Clone for EditorScale

fn clone(&self) -> EditorScale

Returns a duplicate of the value.

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

Performs copy-assignment from source.