RelationshipLayout.h header

using ew::app::relationship::ForceLayoutParams = ew::app::graph::ForceLayoutParams

Tunables for forceDirectedLayout. The algorithm is shared with every other directed graph the app lays out, so the knobs are too.

using ew::app::relationship::RadialLayoutParams = ew::app::graph::RadialLayoutParams

Tunables for radialLayout. Shared for the same reason as ForceLayoutParams.

ew::app::graph::DirectedGraph ew::app::relationship::directedGraph(const RelationshipGraph &graph)

The relationship graph as the bare nodes-and-edges a layout needs.

The layouts read only ids and endpoints – never an entity's name, category or a reference field's label – so handing them the whole relationship graph told them things they had no use for and made them unusable by anything that was not a codex.

std::map< ew::core::foundation::ContentId, QPointF > ew::app::relationship::forceDirectedLayout(const RelationshipGraph &graph, const ForceLayoutParams &params={})

Computes a force-directed layout for graph; see ew::app::graph::forceDirectedLayout, including its cost on a large codex.

std::map< ew::core::foundation::ContentId, QPointF > ew::app::relationship::hierarchicalLayout(const RelationshipGraph &graph)

Computes a top-down hierarchical (layered) layout for graph; see ew::app::graph::hierarchicalLayout. Positions are keyed by entity id.

std::map< ew::core::foundation::ContentId, QPointF > ew::app::relationship::radialLayout(const RelationshipGraph &graph, ew::core::foundation::ContentId focusId, const std::map< ew::core::foundation::ContentId, int > &depths, const RadialLayoutParams &params={})

Computes a radial (concentric-by-depth) layout around focusId; see ew::app::graph::radialLayout. depths is the nodeDepths map for focusId.