Package org.eclipse.zest.layouts.interfaces

Interface ExpandCollapseManager

All Known Implementing Classes:
DAGExpandCollapseManager
public interface ExpandCollapseManager
A manager that controls expanding and collapsing nodes in a Graph.
Since:
2.0

  • Method Details

    • initExpansion

      void initExpansion(LayoutContext context)
      Initializes the expansion state of all nodes in given layout context. The receiver can initialize its internal state related to the layout context and add its listeners if necessary.
      Parameters:
      context - the context to initialize

    • setExpanded

      void setExpanded(LayoutContext context, NodeLayout node, boolean expanded)
      Changes the expanded state of given node. It prunes/unprunes nodes and hides/shows connections in the graph according to its policy. If requested operation cannot be currently performed on the node, it does nothing.
      Parameters:
      context - context in which to perform the operation
      node - node to expand or collapse
      expanded - true to expand, false to collapse

    • canExpand

      boolean canExpand(LayoutContext context, NodeLayout node)
      Checks if given node can be expanded.
      Parameters:
      context - context containing the node
      node - node to check

    • canCollapse

      boolean canCollapse(LayoutContext context, NodeLayout node)
      Checks if given node can be collapsed.
      Parameters:
      context - context containing the node
      node - node to check