acceptsSource
public boolean acceptsSource(Object edge,
Object port) Returns true if port is a valid source for
edge. edge and port must be objects
previously obtained from this data source.
true if port is a valid source for
edge.
acceptsTarget
public boolean acceptsTarget(Object edge,
Object port) Returns true if port is a valid target for
edge. edge and port must be objects
previously obtained from this data source.
true if port is a valid target for
edge.
addGraphModelListener
public void addGraphModelListener(GraphModelListener l)
Adds a listener for the GraphModelEvent posted after the model changes.
addUndoableEditListener
public void addUndoableEditListener(UndoableEditListener listener)
Adds an undo listener for notification of any changes. Undo/Redo
operations performed on the UndoableEdit will cause the
appropriate ModelEvent to be fired to keep the view(s) in sync with the
model.
beginUpdate
public void beginUpdate()
Indicates the start of one level of an executable change
cloneCells
public Map cloneCells(Object[] cells)
Returns a map of (cell, clone)-pairs for all cells and
their children. Special care should be taken to replace references
between cells.
contains
public boolean contains(Object node)
Returns true if node or one of its
ancestors is in the model.
true if node is in the model
edges
public Iterator edges(Object port)
Returns an iterator of the edges connected to port.
port must be a object previously obtained from this data source.
This method never returns null.
port - a port in the graph, obtained from this data source
Iterator that represents the connected edges
edit
public void edit(Map attributes,
ConnectionSet cs,
ParentMap pm,
UndoableEdit[] e) Applies the propertyMap and the connection changes to the
model. The initial edits that triggered the call are
considered to be part of this transaction. Notifies the model- and undo
listeners of the change. Note: If only
edits is non-null, the edits are directly passed to the
UndoableEditListeners.
endUpdate
public void endUpdate()
Indicates the end of the current level of an executable change
execute
public void execute(ExecutableChange change)
Executes the specified executable change on this graph model
change - the change to be executed
getAttributes
public AttributeMap getAttributes(Object node)
Returns a AttributeMap that represents the properties for
the specified cell.
- properties of
node as a Map
getChild
public Object getChild(Object parent,
int index) Returns the child of parent at index index in the
parent's child array. parent must be a node previously obtained
from this data source. This should not return null if index is a
valid index for parent (that is index >= 0 && index
<32getChildCount( parent )).
parent - a node in the tree, obtained from this data source
- the child of parent at index index
getChildCount
public int getChildCount(Object parent)
Returns the number of children of parent . Returns 0 if the node
is a leaf or if it has no children. parent must be a node
previously obtained from this data source.
parent - a node in the tree, obtained from this data source
- the number of children of the node parent
getIndexOfChild
public int getIndexOfChild(Object parent,
Object child) Returns the index of child in parent. If either the parent or child is
null, returns -1.
parent - a note in the tree, obtained from this data sourcechild - the node we are interested in
- the index of the child in the parent, or -1 if either the parent
or the child is
null
getIndexOfRoot
public int getIndexOfRoot(Object root)
Returns the index of root in the model. If root is
null, returns -1.
root - a root in the model, obtained from this data source
- the index of the root in the model, or -1 if the parent is
null
getParent
public Object getParent(Object child)
Returns the parent of child in the model. child must be a
node previously obtained from this data source. This returns null if
child is a root in the model.
child - a node in the graph, obtained from this data source
getRootAt
public Object getRootAt(int index)
Returns the root at index index in the model. This should not
return null if index is a valid index for the model (that is
index >= 0 && index <32getRootCount()).
- the root of at index index
getRootCount
public int getRootCount()
Returns the number of roots in the model. Returns 0 if the model is
empty.
- the number of roots in the model
getSource
public Object getSource(Object edge)
Returns the source of edge. edge must be an
object previously obtained from this data source.
Object that represents the source of edge
getTarget
public Object getTarget(Object edge)
Returns the target of edge. edge must be an
object previously obtained from this data source.
Object that represents the target of edge
getValue
public Object getValue(Object node)
Returns the user object for the specified cell.
insert
public void insert(Object[] roots,
Map attributes,
ConnectionSet cs,
ParentMap pm,
UndoableEdit[] e) Inserts the cells and connections into the model, and
passes attributes to the views. Notifies the model- and
undo listeners of the change.
isEdge
public boolean isEdge(Object edge)
Returns true if edge is a valid edge.
true if edge is a valid edge.
isLeaf
public boolean isLeaf(Object node)
Returns whether the specified node is a leaf node. The way the test is
performed depends on the askAllowsChildren setting.
- true if the node is a leaf node
isPort
public boolean isPort(Object port)
Returns true if port is a valid port,
possibly supporting edge connection.
true if port is a valid port.
remove
public void remove(Object[] roots)
Removes cells from the model. Notifies the model- and undo
listeners of the change.
removeGraphModelListener
public void removeGraphModelListener(GraphModelListener l)
Removes a listener previously added with addGraphModelListener() .
removeUndoableEditListener
public void removeUndoableEditListener(UndoableEditListener listener)
Removes an undo listener.
toBack
public void toBack(Object[] cells)
Sends cells to back.
toFront
public void toFront(Object[] cells)
Brings cells to front.
valueForCellChanged
public Object valueForCellChanged(Object cell,
Object newValue) Messaged when the value of the cell has changed, eg from within the edit
method.