DataViz.Layout.Hierarchy.Types

data HierarchyNode a

Basic hierarchy node after construction Analogous to D3's Node structure but without layout-specific fields Type parameter a represents the user's data type

Note: This is a data type (not newtype or type synonym) to allow:

1. Recursive definition without cycles
2. Pattern matching
3. Direct field access via record syntax

Constructors

• HNode { children :: Array (HierarchyNode a), data_ :: a, depth :: Int, height :: Int, parent :: Maybe (HierarchyNode a) }

Instances

• (Eq a) => Eq (HierarchyNode a)
• (Show a) => Show (HierarchyNode a)

data ValuedNode a

Node with computed value (after calling .sum() or .count()) This is a separate type to ensure type safety - can't use value before computing it

Constructors

• VNode { children :: Array (ValuedNode a), data_ :: a, depth :: Int, height :: Int, parent :: Maybe (ValuedNode a), value :: Number }

Instances

• (Eq a) => Eq (ValuedNode a)
• (Show a) => Show (ValuedNode a)

getData :: forall a. HierarchyNode a -> a

Helper functions to access node fields

getDepth :: forall a. HierarchyNode a -> Int

getHeight :: forall a. HierarchyNode a -> Int

getParent :: forall a. HierarchyNode a -> Maybe (HierarchyNode a)

getChildren :: forall a. HierarchyNode a -> Array (HierarchyNode a)

getValuedData :: forall a. ValuedNode a -> a

Helper functions for ValuedNode

getValue :: forall a. ValuedNode a -> Number

getValuedDepth :: forall a. ValuedNode a -> Int

getValuedHeight :: forall a. ValuedNode a -> Int

getValuedChildren :: forall a. ValuedNode a -> Array (ValuedNode a)

type HierarchyConfig a = { children :: a -> Maybe (Array a) }

Configuration for hierarchy construction

type Hierarchy a = HierarchyNode a

Result of hierarchy construction Just a type alias for clarity

type ValuedHierarchy a = ValuedNode a

Result of sum/count operations Just a type alias for clarity