Struct SliverGridGeometry 

pub struct SliverGridGeometry {
    pub scroll_offset: f64,
    pub cross_axis_offset: f64,
    pub main_axis_extent: f64,
    pub cross_axis_extent: f64,
}

Describes the placement of a child in a RenderSliverGrid.

This class is similar to Rect, in that it gives a two-dimensional position and a two-dimensional dimension, but is direction-agnostic.

See also:

• SliverGridLayout, which represents the geometry of all the tiles in a grid.
• SliverGridLayout::get_geometry_for_child_index, which returns this object to describe the child’s placement.
• RenderSliverGrid, which uses this class during its perform_layout method.

Fields

scroll_offset: f64

The scroll offset of the leading edge of the child relative to the leading edge of the parent.

cross_axis_offset: f64

The offset of the child in the non-scrolling axis.

If the scroll axis is vertical, this offset is from the left-most edge of the parent to the left-most edge of the child. If the scroll axis is horizontal, this offset is from the top-most edge of the parent to the top-most edge of the child.

main_axis_extent: f64

The extent of the child in the scrolling axis.

If the scroll axis is vertical, this extent is the child’s height. If the scroll axis is horizontal, this extent is the child’s width.

cross_axis_extent: f64

The extent of the child in the non-scrolling axis.

If the scroll axis is vertical, this extent is the child’s width. If the scroll axis is horizontal, this extent is the child’s height.

Implementations

impl SliverGridGeometry

pub const fn new( scroll_offset: f64, cross_axis_offset: f64, main_axis_extent: f64, cross_axis_extent: f64, ) -> SliverGridGeometry

Creates an object that describes the placement of a child in a RenderSliverGrid.

pub fn trailing_scroll_offset(&self) -> f64

The scroll offset of the trailing edge of the child relative to the leading edge of the parent.

pub fn get_box_constraints( &self, constraints: SliverConstraints, ) -> BoxConstraints

Returns a tight BoxConstraints that forces the child to have the required size, given a SliverConstraints.

Trait Implementations

impl Clone for SliverGridGeometry

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 SliverGridGeometry

impl Debug for SliverGridGeometry

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

Formats the value using the given formatter.