Struct Viewport 

pub struct Viewport {
    pub translation: Point,
    pub scale: f64,
}

Per-view viewport, excluded from document serialization and history.

Fields

translation: Point

Translation in screen CSS pixels.

scale: f64

Positive magnification (bounded to 0.1–4).

Implementations

impl Viewport

pub fn to_canvas(self, point: Point) -> Result<Point, MindMapError>

Convert view-local screen coordinates into unscaled canvas coordinates.

pub fn zoom_at(&mut self, scale: f64, anchor: Point) -> Result<(), MindMapError>

Zoom around a view-local anchor, preserving its canvas point.

pub fn pan(&mut self, delta: Point) -> Result<(), MindMapError>

Translate by a finite screen-space delta.

pub fn center(&mut self, target: Point, size: Point) -> Result<(), MindMapError>

Center a canvas-space point in the specified view dimensions.

pub fn validate(self) -> Result<(), MindMapError>

Check public fields before applying a transform.

Trait Implementations

impl Clone for Viewport

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 Viewport

impl Debug for Viewport

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

Formats the value using the given formatter.

impl Default for Viewport

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Viewport

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Viewport