Struct ParentData 

pub struct ParentData {
    pub weight: f32,
    pub fill: bool,
    pub box_alignment: Option<Alignment>,
    pub row_alignment: Option<VerticalAlignment>,
    pub row_baseline: bool,
    pub column_alignment: Option<HorizontalAlignment>,
    pub fill_width_fraction: f32,
    pub fill_height_fraction: f32,
    pub layout_data: Option<Rc<dyn LayoutData>>,
}

Layout metadata supplied by a child for its direct parent.

Weight/fill apply to Row and Column. Alignment values override the corresponding parent layout’s default alignment for this child only.

Fields

weight: f32

The child’s share of a Row’s or Column’s room left over; 0 for none.

fill: bool

Whether a weighted child fills its share or may be smaller.

box_alignment: Option<Alignment>

Where the child sits in a Box, over the Box’s own alignment.

row_alignment: Option<VerticalAlignment>

Where the child sits across a Row, over the Row’s own alignment.

row_baseline: bool

Aligns this child’s first baseline with other baseline-aligned Row children.

column_alignment: Option<HorizontalAlignment>

Where the child sits across a Column, over the Column’s own alignment.

fill_width_fraction: f32

The fraction of the parent’s width the child’s outermost horizontal fill modifier asks for; 0 without one. A FlexBox reads it as the child’s default grow. Compose’s FillModifierParentData.

fill_height_fraction: f32

The same for height.

layout_data: Option<Rc<dyn LayoutData>>

The data of the child’s outermost LayoutData modifier, for a parent that reads it by its type.

Implementations

impl ParentData

pub fn has_weight(&self) -> bool

Whether the child takes a share of the room left over.

pub fn layout_data<T: Any>(&self) -> Option<&T>

The child’s LayoutData when it is a T.

Trait Implementations

impl Clone for ParentData

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParentData

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

Formats the value using the given formatter.

impl Default for ParentData

fn default() -> Self

Returns the “default value” for a type.

impl From<FlexParentData> for ParentData

fn from(value: FlexParentData) -> Self

Converts to this type from the input type.

impl PartialEq for ParentData

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

Equality operator ==.

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

Inequality operator !=.