Enum GroupLayout 

pub enum GroupLayout {
    Leaf(usize),
    Split {
        direction: SplitDirection,
        ratio: f32,
        first: Box<GroupLayout>,
        second: Box<GroupLayout>,
    },
}

Recursive binary split tree describing how panes are arranged.

Leaf(k) references the pane at index k in the controller’s internal pane vec. Split describes how a rect is divided between two sub-trees.

In-order leaf traversal gives panes from first (left/top) to last (right/bottom). In-order split traversal gives dividers in the same display order, matching the divider_idx used in events and handle_drag_start.

The controller maintains the invariant that every pane vec index 0..n appears exactly once as a leaf, so Leaf(k) always corresponds to pane k in the vec.

Variants

Leaf(usize)

A single pane (referenced by vec index).

Split

A binary split: first occupies ratio of the parent rect, second gets the rest.

Fields

direction: SplitDirection

Split orientation for this node.

ratio: f32

Fraction of the parent rect assigned to first (0.0–1.0).

first: Box<GroupLayout>

Left/top sub-tree.

second: Box<GroupLayout>

Right/bottom sub-tree.

Implementations

impl GroupLayout

pub fn leaf_count(&self) -> usize

Number of leaves in the tree.

Trait Implementations

impl Clone for GroupLayout

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 GroupLayout

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

Formats the value using the given formatter.

impl PartialEq for GroupLayout

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for GroupLayout