com.mxgraph.sharing
Class mxSharedState

java.lang.Object
  com.mxgraph.util.mxEventSource
      com.mxgraph.sharing.mxSharedState

Direct Known Subclasses:

mxSharedGraphModel

public class mxSharedState
extends mxEventSource

Implements a diagram that may be shared among multiple sessions. This implementation is based only on string, it does not have a model instance. The diagram is represented by its initial state and the sequence of edits as applied to the diagram.

Nested Class Summary

static interface

mxSharedState.mxDiagramChangeListener Defines the requirements for an object that listens to changes on the shared diagram.

Nested classes/interfaces inherited from class com.mxgraph.util.mxEventSource

mxEventSource.mxIEventListener

Field Summary

protected StringBuffer	delta Holds the history of all changes of initial state.
protected List<mxSharedState.mxDiagramChangeListener>	diagramChangeListeners Holds a list of diagram change listeners.
protected String	state Holds the initial state of the diagram.

Fields inherited from class com.mxgraph.util.mxEventSource

eventListeners, eventsEnabled, eventSource

Constructor Summary

mxSharedState(String state)
Constructs a new diagram with the given state.

Method Summary

void	addDelta(String xml)
void	addDiagramChangeListener(mxSharedState.mxDiagramChangeListener listener) Adds the given listener to the list of diagram change listeners.
String	getDelta() Returns the history of all changes as a string.
String	getState() Returns the initial state of the diagram.
void	processDelta(Object sender, Node delta) Appends the given string to the history and dispatches the change to all sessions that are listening to this shared diagram.
protected String	processEdit(Node node)
void	removeDiagramChangeListener(mxSharedState.mxDiagramChangeListener listener) Removes the given listener from the list of diagram change listeners.
void	resetDelta() Clears the history of all changes.

Methods inherited from class com.mxgraph.util.mxEventSource

addListener, fireEvent, fireEvent, getEventSource, isEventsEnabled, removeListener, removeListener, setEventsEnabled, setEventSource

Methods inherited from class java.lang.Object

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

Field Detail

diagramChangeListeners

protected List<mxSharedState.mxDiagramChangeListener> diagramChangeListeners

Holds a list of diagram change listeners.

state

protected String state

Holds the initial state of the diagram.

delta

protected StringBuffer delta

Holds the history of all changes of initial state.

Constructor Detail

mxSharedState

public mxSharedState(String state)

Constructs a new diagram with the given state.

Parameters:

state - Initial state of the diagram.

Method Detail

getState

public String getState()

Returns the initial state of the diagram.

getDelta

public String getDelta()

Returns the history of all changes as a string.

processDelta

public void processDelta(Object sender,
                         Node delta)

Appends the given string to the history and dispatches the change to all sessions that are listening to this shared diagram.

Parameters:

sender - Session where the change originated from.

delta - XML that represents the change.

processEdit

protected String processEdit(Node node)

addDelta

public void addDelta(String xml)

resetDelta

public void resetDelta()

Clears the history of all changes.

addDiagramChangeListener

public void addDiagramChangeListener(mxSharedState.mxDiagramChangeListener listener)

Adds the given listener to the list of diagram change listeners.

Parameters:

listener - Diagram change listener to be added.

removeDiagramChangeListener

public void removeDiagramChangeListener(mxSharedState.mxDiagramChangeListener listener)

Removes the given listener from the list of diagram change listeners.

Parameters:

listener - Diagram change listener to be removed.