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TableColumnWidth

inset_rendering

Trait TableColumnWidth 

Source 
pub trait TableColumnWidth: Debug {
    // Required methods
    fn min_intrinsic_width(
        &self,
        app: &mut App,
        cells: &[AnyRenderBox],
        container_width: f64,
    ) -> f64;
    fn max_intrinsic_width(
        &self,
        app: &mut App,
        cells: &[AnyRenderBox],
        container_width: f64,
    ) -> f64;
    fn as_any(&self) -> &dyn Any;

    // Provided method
    fn flex(&self, app: &mut App, cells: &[AnyRenderBox]) -> Option<f64> { ... }
}
Expand description

Base class to describe how wide a column in a RenderTable should be.

To size a column to a specific number of pixels, use a FixedColumnWidth. This is the cheapest way to size a column.

Other algorithms that are relatively cheap include FlexColumnWidth, which distributes the space equally among the flexible columns, FractionColumnWidth, which sizes a column based on the size of the table’s container.

Required Methods§

Source

fn min_intrinsic_width( &self, app: &mut App, cells: &[AnyRenderBox], container_width: f64, ) -> f64

The smallest width that the column can have.

The cells argument is an iterable that provides all the cells in the table for this column. Walking the cells is by definition O(N), so algorithms that do that should be considered expensive.

The container_width argument is the max_width of the incoming constraints for the table, and might be infinite.

Source

fn max_intrinsic_width( &self, app: &mut App, cells: &[AnyRenderBox], container_width: f64, ) -> f64

The ideal width that the column should have. This must be equal to or greater than the min_intrinsic_width. The column might be bigger than this width, e.g. if the column is flexible or if the table’s width ends up being forced to be bigger than the sum of all the max_intrinsic_width values.

The cells argument is an iterable that provides all the cells in the table for this column. Walking the cells is by definition O(N), so algorithms that do that should be considered expensive.

The container_width argument is the max_width of the incoming constraints for the table, and might be infinite.

Source

fn as_any(&self) -> &dyn Any

Downcast support for Dart’s is checks on a column width.

Provided Methods§

Source

fn flex(&self, app: &mut App, cells: &[AnyRenderBox]) -> Option<f64>

The flex factor to apply to the cell if there is any room left over when laying out the table. The remaining space is distributed to any columns with flex in proportion to their flex value (higher values get more space).

The cells argument is an iterable that provides all the cells in the table for this column. Walking the cells is by definition O(N), so algorithms that do that should be considered expensive.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§