Incremental Hierarchical Layout

This demo shows how to run the HierarchicalLayout algorithm such that a predefined subset of nodes (called "incremental" nodes) is integrated into an existing drawing. While the existing elements may change their positions, their relative order is maintained.

To achieve this, two setup steps are necessary:

• The algorithm has to be told to work in incremental layout mode. To do so, the hierarchical layout's from sketch mode property has to be set to true.
• The algorithm has to know which set of nodes (and edges) should be integrated. The class HierarchicalLayoutData offers the incrementalNodes and incrementalEdges properties for this purpose.

In this demo, the algorithm considers all orange nodes to be "incremental".

Things to Try

Click the button in the toolbar to run the incremental layout and observe the effect.

Demos

More demos that make use of this feature:

• Hierarchical Layout with Exact Coordinates Demo
• Hierarchical Nesting Demo
• Hierarchical Nesting (Incremental) Demo
• Interactive Hierarchical Layout Demo
• Decision Tree Demo
• Collapsible Trees Demo
• Network Flows Demo

Documentation

• Run hierarchical layout on a subset of nodes
• Hierarchical layout algorithm
• HierarchicalLayout class
• HierarchicalLayoutData class