y.view.hierarchy
Class HierarchyEvent

java.lang.Object
  java.util.EventObject
      y.view.hierarchy.HierarchyEvent

All Implemented Interfaces:

java.io.Serializable

public class HierarchyEvent
extends java.util.EventObject

Encapsulates information describing changes to a graph hierarchy and used to notify hierarchy listeners of the change.

See Also:

Serialized Form

Field Summary

static byte	BEGIN_BLOCK Event type specifier which indicates that a block of consecutive events starts.
static byte	EDGE_STATE_CHANGED Event type specifier which indicates that the inter-edge state of an edge has changed.
static byte	END_BLOCK Event type specifier which indicates that a block of consecutive events has ended.
static byte	NODE_ADDED Event type specifier which indicates that a node has been added to the graph hierarchy.
static byte	NODE_CHANGED Event type specifier which indicates that a property change on a node within the graph hierarchy has occurred.
static byte	NODE_REMOVED Event type specifier which indicates that a node has been removed from the graph hierarchy.
static byte	NODE_STATE_CHANGED Event type specifier which indicates that the folder state of a node has changed.
static byte	NODES_GROUPED Event type specifier which indicates that nodes within the hierarchy have been regrouped within the same graph.
static byte	NODES_MOVED Event type specifier which indicates that nodes within the hierarchy have been moved to another graph.
static byte	PRE_EDGE_STATE_CHANGE Event type specifier which indicates that the inter-edge state of an edge is about to change.
static byte	PRE_NODE_STATE_CHANGE Event type specifier which indicates that the folder state of a node is about to change.

Fields inherited from class java.util.EventObject

source

Constructor Summary

HierarchyEvent(HierarchyManager source, byte type, Graph graph, java.lang.Object data)
Creates a new instance of HierarchyEvent.

HierarchyEvent(HierarchyManager source, byte type, java.lang.Object context, java.lang.Object data)
Creates a new instance of HierarchyEvent.

Method Summary

java.lang.Object	getContext() the hierarchy level on which a change occurred
java.lang.Object	getData() data associated with a specific event type
Graph	getGraph() the hierarchy level on which a change occurred
HierarchyManager	getHierarchy() Returns the hierarchy manager that is the source of this event.
byte	getType() Returns the type specifier of this event.

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

NODE_ADDED

public static final byte NODE_ADDED

Event type specifier which indicates that a node has been added to the graph hierarchy. The associated event data will be the node that has been added.

See Also:

Constant Field Values

NODE_REMOVED

public static final byte NODE_REMOVED

Event type specifier which indicates that a node has been removed from the graph hierarchy. The associated event data will be the node that has been removed.

See Also:

Constant Field Values

NODE_CHANGED

public static final byte NODE_CHANGED

Event type specifier which indicates that a property change on a node within the graph hierarchy has occurred. The associated event data will be the node whose property has changed.

See Also:

Constant Field Values

NODES_MOVED

public static final byte NODES_MOVED

Event type specifier which indicates that nodes within the hierarchy have been moved to another graph. The associated event data will be of type NodeList. The node list will contain the nodes which have been moved. The graph associated with the event will be the source graph from where the nodes have been moved.

See Also:

Constant Field Values

NODE_STATE_CHANGED

public static final byte NODE_STATE_CHANGED

Event type specifier which indicates that the folder state of a node has changed. The associated event data will be the node whose folder state has changed.

See Also:

Constant Field Values

EDGE_STATE_CHANGED

public static final byte EDGE_STATE_CHANGED

Event type specifier which indicates that the inter-edge state of an edge has changed. The associated event data will be the edge whose inter-edge state has changed.

See Also:

Constant Field Values

PRE_NODE_STATE_CHANGE

public static final byte PRE_NODE_STATE_CHANGE

Event type specifier which indicates that the folder state of a node is about to change. The associated event data will be the node whose folder state has changed.

See Also:

Constant Field Values

PRE_EDGE_STATE_CHANGE

public static final byte PRE_EDGE_STATE_CHANGE

Event type specifier which indicates that the inter-edge state of an edge is about to change. The associated event data will be the edge whose inter-edge state has changed.

See Also:

Constant Field Values

NODES_GROUPED

public static final byte NODES_GROUPED

Event type specifier which indicates that nodes within the hierarchy have been regrouped within the same graph. The associated event data will be of type NodeList. The node list will contain the nodes which have been regrouped. The graph associated with the event will be the source graph from where the nodes have been moved.

See Also:

Constant Field Values

BEGIN_BLOCK

public static final byte BEGIN_BLOCK

Event type specifier which indicates that a block of consecutive events starts. There is no other consecutive event data These events may be nested!

See Also:

Constant Field Values

END_BLOCK

public static final byte END_BLOCK

Event type specifier which indicates that a block of consecutive events has ended. There is no other consecutive event data These events may be nested!

See Also:

Constant Field Values

Constructor Detail

HierarchyEvent

public HierarchyEvent(HierarchyManager source,
                      byte type,
                      Graph graph,
                      java.lang.Object data)

Creates a new instance of HierarchyEvent.

Parameters:

source - the emitter of this event

type - one of the event type specifiers defined in this class

graph - the hierarchy level on which a change occurred

data - data associated with a specific event type

HierarchyEvent

public HierarchyEvent(HierarchyManager source,
                      byte type,
                      java.lang.Object context,
                      java.lang.Object data)

Creates a new instance of HierarchyEvent.

Parameters:

source - the emitter of this event

type - one of the event type specifiers defined in this class

context - the hierarchy level on which a change occurred

data - data associated with a specific event type

Method Detail

getHierarchy

public HierarchyManager getHierarchy()

Returns the hierarchy manager that is the source of this event.

getType

public byte getType()

Returns the type specifier of this event.

Returns:

one of the type specifiers defined in this class.

getGraph

public Graph getGraph()

the hierarchy level on which a change occurred

getContext

public java.lang.Object getContext()

the hierarchy level on which a change occurred

getData

public java.lang.Object getData()

data associated with a specific event type