Struct SliverGridDelegateWithMaxCrossAxisExtent 

pub struct SliverGridDelegateWithMaxCrossAxisExtent {
    pub max_cross_axis_extent: f64,
    pub main_axis_spacing: f64,
    pub cross_axis_spacing: f64,
    pub child_aspect_ratio: f64,
    pub main_axis_extent: Option<f64>,
}

Creates grid layouts with tiles that each have a maximum cross-axis extent.

This delegate will select a cross-axis extent for the tiles that is as large as possible subject to the following conditions:

• The extent evenly divides the cross-axis extent of the grid.
• The extent is at most max_cross_axis_extent.

For example, if the grid is vertical, the grid is 500.0 pixels wide, and max_cross_axis_extent is 150.0, this delegate will create a grid with 4 columns that are 125.0 pixels wide.

This delegate creates grids with equally sized and spaced tiles.

Dart’s named constructor arguments are the fluent setters.

See also:

• SliverGridDelegateWithFixedCrossAxisCount, which creates a layout with a fixed number of tiles in the cross axis.
• SliverGridDelegate, which creates arbitrary layouts.
• RenderSliverGrid, which can use this delegate to control the layout of its tiles.

Fields

max_cross_axis_extent: f64

The maximum extent of tiles in the cross axis.

main_axis_spacing: f64

The number of logical pixels between each child along the main axis.

cross_axis_spacing: f64

The number of logical pixels between each child along the cross axis.

child_aspect_ratio: f64

The ratio of the cross-axis to the main-axis extent of each child.

main_axis_extent: Option<f64>

The extent of each tile in the main axis. If provided it would define the logical pixels taken by each tile in the main-axis.

If None, child_aspect_ratio is used instead.

Implementations

impl SliverGridDelegateWithMaxCrossAxisExtent

pub fn new( max_cross_axis_extent: f64, ) -> SliverGridDelegateWithMaxCrossAxisExtent

Creates a delegate that makes grid layouts with tiles that have a maximum cross-axis extent.

The max_cross_axis_extent must be greater than zero.

pub fn main_axis_spacing(self, value: f64) -> Self

Dart SliverGridDelegateWithMaxCrossAxisExtent(mainAxisSpacing:). Must not be negative.

pub fn cross_axis_spacing(self, value: f64) -> Self

Dart SliverGridDelegateWithMaxCrossAxisExtent(crossAxisSpacing:). Must not be negative.

pub fn child_aspect_ratio(self, value: f64) -> Self

Dart SliverGridDelegateWithMaxCrossAxisExtent(childAspectRatio:). Must be greater than zero.

pub fn main_axis_extent(self, value: f64) -> Self

Dart SliverGridDelegateWithMaxCrossAxisExtent(mainAxisExtent:). Must not be negative.

Trait Implementations

impl Clone for SliverGridDelegateWithMaxCrossAxisExtent

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 SliverGridDelegateWithMaxCrossAxisExtent

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

Formats the value using the given formatter.

impl SliverGridDelegate for SliverGridDelegateWithMaxCrossAxisExtent

fn get_layout( &self, constraints: SliverConstraints, ) -> Box<dyn SliverGridLayout>

Returns information about the size and position of the tiles in the grid.

fn should_relayout(&self, old_delegate: &dyn SliverGridDelegate) -> bool

Override this method to return true when the children need to be laid out.

fn as_any(&self) -> &dyn Any

Downcast support for Dart’s runtimeType comparison and covariant parameters.