Struct ZoomView 

pub struct ZoomView {
    pub scale: f32,
    pub center: Point,
    pub fit: bool,
    pub viewport: Size,
}

How a picture is being looked at: how much it is enlarged and which part is in the middle. ZoomPanView, ZoomControl and Minimap share one through a Binding, and each changes what it is responsible for.

While fit is on, ZoomPanView keeps the whole content in view and writes the scale this takes, so the value also reads correctly when the window is resized.

Fields

scale: f32

Screen pixels per unit of content: 1 is 100%.

center: Point

The point of the content in the middle of the view, from 0 to 1 on each axis.

fit: bool

Follows the view’s size to show the whole content.

viewport: Size

The size of the view on screen, written by ZoomPanView and read by Minimap.

Implementations

impl ZoomView

pub const fn fit() -> Self

Shows the whole content.

pub const fn at(scale: f32) -> Self

At this scale, centered.

pub const fn centered_on(self, center: Point) -> Self

The same view around this point of the content, from 0 to 1 on each axis.

pub fn placed(&self, content: Size) -> Rect

Where the whole content lands, relative to the top left corner of the view.

pub fn visible(&self, content: Size) -> Rect

The part of the content in view, from 0 to 1 on each axis.

Trait Implementations

impl Clone for ZoomView

fn clone(&self) -> ZoomView

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ZoomView

impl Debug for ZoomView

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

Formats the value using the given formatter.

impl Default for ZoomView

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ZoomView

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ZoomView