Struct SceneConstraints 

pub struct SceneConstraints { /* private fields */ }

Reactive interaction-policy bundle owned by Scene. Apps configure pan/zoom behaviour by writing to these signals; gesture closures in SceneView read them live, so runtime mode switches (e.g. a toolbar toggling pan locks) take effect on the next event without rebuilding the view.

All four signals are exposed individually via Scene accessors (pan_axes_signal, pan_bounds_signal, zoom_range_signal, zoomable_signal). Per-(sub-)scene independence falls out of the model: each nested SceneView carries its own Scene with its own SceneConstraints.

View-level tightening overrides (pan_bounds_override, zoom_range_override) layer on top per-SceneView — the effective constraint is the intersection. Two views over the same Scene can lock down independently; neither can loosen what the Scene declares.

Implementations

impl SceneConstraints

pub fn pan_axes_signal(&self) -> Signal<PanAxes>

Reactive pan-axes signal. Gesture handlers read live.

pub fn pan_bounds_signal(&self) -> Signal<Option<Rect>>

Reactive pan-bounds signal. None = unconstrained.

pub fn zoom_range_signal(&self) -> Signal<Option<RangeInclusive<f32>>>

Reactive zoom-range signal. None = unconstrained from the Scene side.

pub fn zoomable_signal(&self) -> Signal<bool>

Reactive zoomable-on/off signal. Equivalent to a zero-width zoom_range — kept as a separate boolean for clarity and efficient short-circuit at gesture time.

Trait Implementations

impl Debug for SceneConstraints

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

Formats the value using the given formatter.

impl Default for SceneConstraints

fn default() -> Self

Returns the “default value” for a type.