org.eclipse.gef4.layout.listeners

Interface ILayoutListener

public interface ILayoutListener

Noimplement:

This interface is not intended to be implemented by clients.

Noextend:

This interface is not intended to be extended by clients.

Method Summary

Modifier and Type	Method and Description
boolean	nodeMoved(ILayoutContext context, INodeLayout node) This method is called whenever location of a particular node is changed within observed context.
boolean	nodeResized(ILayoutContext context, INodeLayout node) This method is called whenever size of a particular node is changed within observed context.
boolean	subgraphMoved(ILayoutContext context, ISubgraphLayout subgraph) This method is called whenever location of a particular subgraph is changed within observed context.
boolean	subgraphResized(ILayoutContext context, ISubgraphLayout subgraph) This method is called whenever size of a particular subgraph is changed within observed context.

Method Detail

nodeMoved

boolean nodeMoved(ILayoutContext context,
                  INodeLayout node)

This method is called whenever location of a particular node is changed within observed context. This usually implicates change of position (the center of the node) and the receiver should be aware of it (no additional nodeMoved(ILayoutContext, INodeLayout) event will be fired). If true is returned, no dynamic layout will be applied after notifying all listeners, i.e. a dynamic layout pass will only be applied when all registered ILayoutListeners return false.

Parameters:

context - the layout context that fired the event

node - the node that has moved

Returns:

true if no dynamic layout should be applied afterwards.

nodeResized

boolean nodeResized(ILayoutContext context,
                    INodeLayout node)

This method is called whenever size of a particular node is changed within observed context. This usually implicates change of position (the center of the node) and the receiver should be aware of it (no additional nodeMoved(ILayoutContext, INodeLayout) event will be fired). If true is returned, no dynamic layout will be applied after notifying all listeners, i.e. a dynamic layout pass will only be applied when all registered ILayoutListeners return false.

Parameters:

context - the layout context that fired the event

node - the node that was resized

Returns:

true if no dynamic layout should be applied afterwards.

subgraphMoved

boolean subgraphMoved(ILayoutContext context,
                      ISubgraphLayout subgraph)

This method is called whenever location of a particular subgraph is changed within observed context. If true is returned, no dynamic layout will be applied after notifying all listeners, i.e. a dynamic layout pass will only be applied when all registered ILayoutListeners return false.

Parameters:

context - the layout context that fired the event

subgraph - the subgraph that has moved

Returns:

true if no dynamic layout should be applied afterwards.

subgraphResized

boolean subgraphResized(ILayoutContext context,
                        ISubgraphLayout subgraph)

This method is called whenever size of a particular subgraph is changed within observed context. This usually implicates change of position (the center of the node) and the receiver should be aware of it (no additional nodeMoved(ILayoutContext, INodeLayout) event will be fired). If true is returned, no dynamic layout will be applied after notifying all listeners, i.e. a dynamic layout pass will only be applied when all registered ILayoutListeners return false.

Parameters:

context - the layout context that fired the event

subgraph - the subgraph that was resized

Returns:

true if no dynamic layout should be applied afterwards.