Struct ViewportTransform 

pub struct ViewportTransform {
    pub pan: CanvasPoint,
    pub zoom: f32,
}

Current viewport transform.

pan is stored in canvas space and zoom is a positive scale factor. Screen projection follows (canvas + pan) * zoom, matching the existing fit-view helpers and persisted view-state.

Fields

pan: CanvasPoint

Canvas-space pan.

zoom: f32

Positive zoom factor.

Implementations

impl ViewportTransform

pub fn new(pan: CanvasPoint, zoom: f32) -> Option<Self>

Creates a viewport transform when pan is finite and zoom is positive finite.

pub fn is_valid(self) -> bool

Returns true when the transform can safely participate in viewport math.

pub fn from_view_state(view_state: &NodeGraphViewState) -> Option<Self>

Reads the viewport transform from a persisted view-state.

pub fn screen_point_for_canvas(self, canvas: CanvasPoint) -> Option<CanvasPoint>

Projects a canvas point into logical screen pixels.

pub fn canvas_point_at_screen(self, screen: CanvasPoint) -> CanvasPoint

Converts a logical screen-pixel point to canvas space.

Trait Implementations

impl Clone for ViewportTransform

fn clone(&self) -> ViewportTransform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ViewportTransform

impl Debug for ViewportTransform

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ViewportTransform

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ViewportTransform

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ViewportTransform

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ViewportTransform