edu.princeton.cs.algs4.growingtree.framework
Class TreeMessageEvent

java.lang.Object
  java.util.EventObject
      java.awt.AWTEvent
          edu.princeton.cs.algs4.growingtree.framework.TreeMessageEvent

All Implemented Interfaces:

java.io.Serializable

public class TreeMessageEvent
extends java.awt.AWTEvent

A semantic event which indicates that a TreeMessage-defined action occured. This high-level event is generated by an Tree Object when an action occurs (such as a change in size). The event is passed to every TreeMessageListener object that registered to receive such events using the Animation's addTreeMessageListener method.

The object that implements the TreeMessageListener interface gets this TreeMessageEvent when the event occurs. The listener is therefore spared the details of processing individual selection, and can instead process a "meaningful" (semantic) event.

Version:

1.3 9/15/01

Author:

Corey Sanders

See Also:

Serialized Form

Field Summary

static int	ANIMATION ID for the Animation event.
static java.lang.String	ANIMATION_CHANGE command passed for animation change.
static java.lang.String	ANIMATION_STEP_CHANGE command passed for animation step change.
static java.lang.String	COLOR_CHANGE command passed for a change in color choice.
static java.lang.String	COLOR_PANEL command passed for color panel request.
static java.lang.String	ERROR_MESSAGE command passed for an error message.
static java.lang.String	KEY_TYPE_CHANGE command passed for change of key type.
static int	PANEL ID for the Panel event.
static java.lang.String	SET_INPUT_OPTIONS command passed for set input options request.
static java.lang.String	SET_PRESET_COLOR_OPTIONS command passed for set color settings request.
static java.lang.String	STATUS_MESSAGE command passed for status message.
static int	TREE ID for the Tree event.

Fields inherited from class java.awt.AWTEvent

ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, WINDOW_STATE_EVENT_MASK

Constructor Summary

TreeMessageEvent(java.lang.Object source, int id, java.lang.String msg)
Constructs a TreeMessageEvent object.

TreeMessageEvent(java.lang.Object source, int id, java.lang.String msg, java.lang.Object msgObject)
Constructs a TreeMessageEvent object with a message object.

Method Summary

java.lang.String	getMessage() Returns the description String associated with this AnimationEvent.
java.lang.Object	getMessageObject() Returns the status String associated with this AnimationEvent.

Methods inherited from class java.awt.AWTEvent

getID, paramString, setSource, toString

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

TREE

public static final int TREE

ID for the Tree event.

See Also:

Constant Field Values

PANEL

public static final int PANEL

ID for the Panel event.

See Also:

Constant Field Values

ANIMATION

public static final int ANIMATION

ID for the Animation event.

See Also:

Constant Field Values

KEY_TYPE_CHANGE

public static final java.lang.String KEY_TYPE_CHANGE

command passed for change of key type.

See Also:

Constant Field Values

ERROR_MESSAGE

public static final java.lang.String ERROR_MESSAGE

command passed for an error message.

See Also:

Constant Field Values

COLOR_PANEL

public static final java.lang.String COLOR_PANEL

command passed for color panel request.

See Also:

Constant Field Values

ANIMATION_CHANGE

public static final java.lang.String ANIMATION_CHANGE

command passed for animation change.

See Also:

Constant Field Values

ANIMATION_STEP_CHANGE

public static final java.lang.String ANIMATION_STEP_CHANGE

command passed for animation step change.

See Also:

Constant Field Values

STATUS_MESSAGE

public static final java.lang.String STATUS_MESSAGE

command passed for status message.

See Also:

Constant Field Values

SET_INPUT_OPTIONS

public static final java.lang.String SET_INPUT_OPTIONS

command passed for set input options request.

See Also:

Constant Field Values

SET_PRESET_COLOR_OPTIONS

public static final java.lang.String SET_PRESET_COLOR_OPTIONS

command passed for set color settings request.

See Also:

Constant Field Values

COLOR_CHANGE

public static final java.lang.String COLOR_CHANGE

command passed for a change in color choice.

See Also:

Constant Field Values

Constructor Detail

TreeMessageEvent

public TreeMessageEvent(java.lang.Object source,
                        int id,
                        java.lang.String msg)

Constructs a TreeMessageEvent object.

Parameters:

source - the object that originated the event

id - an integer that identifies the event

msg - String message.

TreeMessageEvent

public TreeMessageEvent(java.lang.Object source,
                        int id,
                        java.lang.String msg,
                        java.lang.Object msgObject)

Constructs a TreeMessageEvent object with a message object.

Parameters:

source - the object that originated the event

id - an integer that identifies the event

msg - String message.

msgObject - object that refers to the String message.

Method Detail

getMessage

public java.lang.String getMessage()

Returns the description String associated with this AnimationEvent.

Returns:

the string identifying the description for this event

getMessageObject

public java.lang.Object getMessageObject()

Returns the status String associated with this AnimationEvent.

Returns:

the string identifying the status for this event