Struct ViewConfiguration 

pub struct ViewConfiguration {
    pub logical_constraints: BoxConstraints,
    pub physical_constraints: BoxConstraints,
    pub device_pixel_ratio: f64,
}

The layout constraints for the root render object.

Fields

logical_constraints: BoxConstraints

The constraints of the output surface in logical pixels.

physical_constraints: BoxConstraints

The constraints of the output surface in physical pixels.

device_pixel_ratio: f64

The pixel density of the output surface.

Implementations

impl ViewConfiguration

pub const fn new( physical_constraints: BoxConstraints, logical_constraints: BoxConstraints, device_pixel_ratio: f64, ) -> ViewConfiguration

Creates a view configuration.

By default, the view has zero constraints and a pixel ratio of 1.0.

pub fn from_view(view: &dyn View) -> ViewConfiguration

Creates a view configuration that matches view.

pub fn to_matrix(&self) -> Matrix4

Creates a transformation matrix that applies the device_pixel_ratio.

pub fn should_update_matrix( &self, old_configuration: &ViewConfiguration, ) -> bool

Returns whether to_matrix would return a different value for this configuration than it would for the given old_configuration.

pub fn to_physical_size(&self, logical_size: Size) -> Size

Transforms the provided logical_size to physical pixels.

Trait Implementations

impl Clone for ViewConfiguration

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 ViewConfiguration

impl Debug for ViewConfiguration

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

Formats the value using the given formatter.

impl Default for ViewConfiguration

fn default() -> ViewConfiguration

Returns the “default value” for a type.

impl PartialEq for ViewConfiguration

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ViewConfiguration