Struct Viewport 

pub struct Viewport {
    pub area: Rectangle,
    pub zoom: f32,
    pub offset: Point,
}

Viewport management for chart rendering

Fields

area: Rectangle

The visible area

zoom: f32

Zoom level (1.0 = normal, >1.0 = zoomed in)

offset: Point

Pan offset

Implementations

impl Viewport

pub fn new(area: Rectangle) -> Self

Create a new viewport

pub fn with_zoom(self, zoom: f32) -> Self

Set the zoom level

pub fn with_offset(self, offset: Point) -> Self

Set the pan offset

pub fn transform_point( &self, data_point: Point, data_bounds: Rectangle, ) -> Point

Transform a point from data coordinates to screen coordinates

pub fn is_point_visible(&self, point: Point) -> bool

Check if a point is visible in the viewport

pub fn visible_data_bounds(&self, full_data_bounds: Rectangle) -> Rectangle

Get the visible data bounds for the current viewport

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Viewport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Viewport

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

Formats the value using the given formatter.

impl PartialEq for Viewport

fn eq(&self, other: &Viewport) -> 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 Copy for Viewport

impl StructuralPartialEq for Viewport