Struct LayoutEngine 

pub struct LayoutEngine { /* private fields */ }

Layout engine backed by Taffy.

Manages a tree of layout nodes associated with widget IDs, computes CSS Flexbox and Grid layout, and returns integer-cell results.

Implementations

impl LayoutEngine

pub fn new() -> Self

Create a new empty layout engine.

pub fn add_node( &mut self, widget_id: WidgetId, style: Style, ) -> Result<(), LayoutError>

Add a leaf node with the given style.

pub fn add_node_with_children( &mut self, widget_id: WidgetId, style: Style, children: &[WidgetId], ) -> Result<(), LayoutError>

Add a node with children.

pub fn set_root(&mut self, widget_id: WidgetId) -> Result<(), LayoutError>

Set the root node for layout computation.

pub fn update_style( &mut self, widget_id: WidgetId, style: Style, ) -> Result<(), LayoutError>

Update the style of an existing node.

pub fn remove_node(&mut self, widget_id: WidgetId) -> Result<(), LayoutError>

Remove a node from the layout tree.

pub fn compute( &mut self, available_width: u16, available_height: u16, ) -> Result<(), LayoutError>

Compute layout using the given available space.

pub fn layout(&self, widget_id: WidgetId) -> Result<LayoutRect, LayoutError>

Get the computed layout for a widget as a LayoutRect.

pub fn layout_rect(&self, widget_id: WidgetId) -> Result<Rect, LayoutError>

Get the computed layout for a widget as a Rect.

pub fn has_node(&self, widget_id: WidgetId) -> bool

Check if a widget has a layout node.

pub fn node_count(&self) -> usize

Return the number of nodes in the tree.

Trait Implementations

impl Default for LayoutEngine

fn default() -> Self

Returns the “default value” for a type.