Struct RowPositionSolver 

pub struct RowPositionSolver<D>
where
    D: Directional,
{ /* private fields */ }

Allows efficient implementations of draw / event handlers based on the layout representation.

This is only applicable where child widgets are contained in a Collection.

Implementations

impl<D> RowPositionSolver<D>

where D: Directional,

pub fn new(direction: D) -> RowPositionSolver<D>

Construct with given directionality

pub fn find_child_index<C>(self, widgets: &C, coord: Coord) -> Option<usize>

where C: Collection + ?Sized,

Find the child containing the given coordinates

Returns None when the coordinates lie within the margin area or outside of the parent widget. Also returns None if Collection::get_tile returns None for some index less than len (a theoretical but unexpected error case).

pub fn find_child<C>(self, widgets: &C, coord: Coord) -> Option<&dyn Tile>

where C: Collection + ?Sized,

Find the child containing the given coordinates

Returns None when the coordinates lie within the margin area or outside of the parent widget. Also returns None if Collection::get_tile returns None for some index less than len (a theoretical but unexpected error case).

pub fn find_child_mut<C>( self, widgets: &mut C, coord: Coord, ) -> Option<&mut dyn Tile>

where C: Collection + ?Sized,

Find the child containing the given coordinates

Returns None when the coordinates lie within the margin area or outside of the parent widget. Also returns None if Collection::get_tile returns None for some index less than len (a theoretical but unexpected error case).

pub fn for_children<C, F>(self, widgets: &C, rect: Rect, f: F)

where C: Collection + ?Sized, F: FnMut(&dyn Tile),

Call f on each child intersecting the given rect

Trait Implementations

impl<D> Clone for RowPositionSolver<D>

where D: Clone + Directional,

fn clone(&self) -> RowPositionSolver<D>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<D> Debug for RowPositionSolver<D>

where D: Debug + Directional,

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

Formats the value using the given formatter.

impl<D> Copy for RowPositionSolver<D>

where D: Copy + Directional,