fr.lri.swingstates.sm
Interface StateMachineListener

All Known Implementing Classes:

BasicInputStateMachine, CStateMachine, DnDStateMachine, JStateMachine, PressDragReleaseStateMachine, StateMachine

public interface StateMachineListener

The listener interface for receiving events fired by state machines. (An event is fired by a state machine when its method fireEvent has been called).

The class that is interested in processing events fired by a state machine implements this interface (and the method it contains).

The listener object created from that class is then registered with a state machine sm using the addStateMachineListener method on sm.

The following example is just an illustration of the mechanism and is not very useful. Note that a state machine is itself a StateMachineListener so a state machine can process events fired by other state machine. To see a more interesting example that uses two state machines, take a look at the pie menu applet example on SwingStates web site.

 CStateMachine sm = new CStateMachine() {
    public State start = new State() {
       Transition selectColor = new PressOnShape() {
        public void action() {
             fireEvent(new VirtualEvent(""+getShape().getFillPaint()));
          }
       };
    };
 };
 sm.addStateMachineListener(new StateMachineListener() {
    public void eventOccured(EventObject event) {
       System.out.println("The pressed shape is filled in "+((VirtualEvent)event).getName());
    };
 });
 

Author:

Caroline Appert

See Also:

StateMachineEvent, StateMachineEventAdapter

Method Summary

void	eventOccured(java.util.EventObject eventObject) Invoked when the state machine has fired an event.

Method Detail

eventOccured

void eventOccured(java.util.EventObject eventObject)

Invoked when the state machine has fired an event.

Parameters:

eventObject - the event.