Struct SliverGridDelegateWithFixedCrossAxisCount 

pub struct SliverGridDelegateWithFixedCrossAxisCount {
    pub cross_axis_count: i32,
    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 a fixed number of tiles in the cross axis.

For example, if the grid is vertical, this delegate will create a layout with a fixed number of columns. If the grid is horizontal, this delegate will create a layout with a fixed number of rows.

This delegate creates grids with equally sized and spaced tiles.

Dart’s named constructor arguments are the fluent setters.

See also:

• SliverGridDelegateWithMaxCrossAxisExtent, which creates a layout with tiles that have a maximum cross-axis extent.
• SliverGridDelegate, which creates arbitrary layouts.
• RenderSliverGrid, which can use this delegate to control the layout of its tiles.

Fields

cross_axis_count: i32

The number of children 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 SliverGridDelegateWithFixedCrossAxisCount

pub fn new(cross_axis_count: i32) -> SliverGridDelegateWithFixedCrossAxisCount

Creates a delegate that makes grid layouts with a fixed number of tiles in the cross axis.

The cross_axis_count must be greater than zero.

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

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

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

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

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

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

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

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

Trait Implementations

impl Clone for SliverGridDelegateWithFixedCrossAxisCount

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 SliverGridDelegateWithFixedCrossAxisCount

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

Formats the value using the given formatter.

impl SliverGridDelegate for SliverGridDelegateWithFixedCrossAxisCount

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.