Struct MeasureInput 

pub struct MeasureInput {
    pub known_width: Option<f32>,
    pub known_height: Option<f32>,
    pub available_width: AvailableSpace,
    pub available_height: AvailableSpace,
    pub scale: f32,
}

What one measure call offers a widget.

Fields

known_width: Option<f32>

The width of the content box the layout engine treats as fixed for this call, inside the node’s padding and border.

A fixed size comes from the node’s style or from a container that stretches the node across this axis. It can be absent even when the node’s style fixes a width: the engine’s final layout pass passes no fixed size at all.

known_height: Option<f32>

The height of the content box the layout engine treats as fixed for this call, inside the node’s padding and border.

A fixed size comes from the node’s style or from a container that stretches the node across this axis. It can be absent even when the node’s style fixes a height: the engine’s final layout pass passes no fixed size at all.

available_width: AvailableSpace

The space offered on the x axis, inside the node’s padding and border.

available_height: AvailableSpace

The space offered on the y axis, inside the node’s padding and border.

scale: f32

The number of physical pixels per logical pixel the window runs at, so a widget that sizes itself from pixel data, such as an image, can divide it out.

Trait Implementations

impl Clone for MeasureInput

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 MeasureInput

impl Debug for MeasureInput

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

Formats the value using the given formatter.