Class PaintEvent

java.lang.Object

java.util.EventObject

java.awt.AWTEvent

java.awt.event.ComponentEvent

java.awt.event.PaintEvent

All Implemented Interfaces:

Serializable

public class PaintEvent
extends ComponentEvent

The component-level paint event. This event is a special type which is used to ensure that paint/update method calls are serialized along with the other events delivered from the event queue. This event is not designed to be used with the Event Listener model; programs should continue to override paint/update methods in order render themselves properly.

An unspecified behavior will be caused if the id parameter of any particular PaintEvent instance is not in the range from PAINT_FIRST to PAINT_LAST.

Since:

1.1

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	PAINT	The paint event type.
static final int	PAINT_FIRST	Marks the first integer id for the range of paint event ids.
static final int	PAINT_LAST	Marks the last integer id for the range of paint event ids.
static final int	UPDATE	The update event type.

Fields declared in class ComponentEvent

COMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWN

Modifier and Type	Field	Description
static final int	COMPONENT_FIRST	The first number in the range of ids used for component events.
static final int	COMPONENT_HIDDEN	This event indicates that the component was rendered invisible.
static final int	COMPONENT_LAST	The last number in the range of ids used for component events.
static final int	COMPONENT_MOVED	This event indicates that the component's position changed.
static final int	COMPONENT_RESIZED	This event indicates that the component's size changed.
static final int	COMPONENT_SHOWN	This event indicates that the component was made visible.

Fields declared in class AWTEvent

ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, 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

Modifier and Type	Field	Description
static final long	ACTION_EVENT_MASK	The event mask for selecting action events.
static final long	ADJUSTMENT_EVENT_MASK	The event mask for selecting adjustment events.
static final long	COMPONENT_EVENT_MASK	The event mask for selecting component events.
protected boolean	consumed	Controls whether or not the event is sent back down to the peer once the source has processed it - false means it's sent to the peer; true means it's not.
static final long	CONTAINER_EVENT_MASK	The event mask for selecting container events.
static final long	FOCUS_EVENT_MASK	The event mask for selecting focus events.
static final long	HIERARCHY_BOUNDS_EVENT_MASK	The event mask for selecting hierarchy bounds events.
static final long	HIERARCHY_EVENT_MASK	The event mask for selecting hierarchy events.
protected int	id	The event's id.
static final long	INPUT_METHOD_EVENT_MASK	The event mask for selecting input method events.
static final long	INVOCATION_EVENT_MASK	The event mask for selecting invocation events.
static final long	ITEM_EVENT_MASK	The event mask for selecting item events.
static final long	KEY_EVENT_MASK	The event mask for selecting key events.
static final long	MOUSE_EVENT_MASK	The event mask for selecting mouse events.
static final long	MOUSE_MOTION_EVENT_MASK	The event mask for selecting mouse motion events.
static final long	MOUSE_WHEEL_EVENT_MASK	The event mask for selecting mouse wheel events.
static final long	PAINT_EVENT_MASK	The event mask for selecting paint events.
static final int	RESERVED_ID_MAX	The maximum value for reserved AWT event IDs.
static final long	TEXT_EVENT_MASK	The event mask for selecting text events.
static final long	WINDOW_EVENT_MASK	The event mask for selecting window events.
static final long	WINDOW_FOCUS_EVENT_MASK	The event mask for selecting window focus events.
static final long	WINDOW_STATE_EVENT_MASK	The event mask for selecting window state events.

Fields declared in class EventObject

source

Modifier and Type	Field	Description
protected Object	source	The object on which the Event initially occurred.

Constructor Summary

Constructors

Constructor	Description
PaintEvent(Component source, int id, Rectangle updateRect)	Constructs a PaintEvent object with the specified source component and type.

Method Summary

Modifier and Type	Method	Description
Rectangle	getUpdateRect()	Returns the rectangle representing the area which needs to be repainted in response to this event.
void	setUpdateRect(Rectangle updateRect)	Sets the rectangle representing the area which needs to be repainted in response to this event.

Methods declared in class ComponentEvent

getComponent, paramString

Modifier and Type	Method	Description
Component	getComponent()	Returns the originator of the event.
String	paramString()	Returns a parameter string identifying this event.

Methods declared in class AWTEvent

consume, getID, isConsumed, setSource, toString

Modifier and Type	Method	Description
protected void	consume()	Consumes this event, if this event can be consumed.
int	getID()	Returns the event type.
protected boolean	isConsumed()	Returns whether this event has been consumed.
void	setSource(Object newSource)	Retargets an event to a new source.
String	toString()	Returns a String representation of this object.

Methods declared in class EventObject

getSource

Modifier and Type	Method	Description
Object	getSource()	The object on which the Event initially occurred.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Field Details

PAINT_FIRST

public static final int PAINT_FIRST

Marks the first integer id for the range of paint event ids.

See Also:

• Constant Field Values

PAINT_LAST

public static final int PAINT_LAST

Marks the last integer id for the range of paint event ids.

See Also:

• Constant Field Values

PAINT

public static final int PAINT

The paint event type.

See Also:

• Constant Field Values

UPDATE

public static final int UPDATE

The update event type.

See Also:

• Constant Field Values

Constructor Details

PaintEvent

public PaintEvent(Component source,
 int id,
 Rectangle updateRect)

Constructs a PaintEvent object with the specified source component and type.

This method throws an IllegalArgumentException if source is null.

Parameters:

source - The object where the event originated

id - The integer that identifies the event type. For information on allowable values, see the class description for PaintEvent

updateRect - The rectangle area which needs to be repainted

Throws:

IllegalArgumentException - if source is null

See Also:

• EventObject.getSource()
• AWTEvent.getID()
• getUpdateRect()

Method Details

getUpdateRect

public Rectangle getUpdateRect()

Returns the rectangle representing the area which needs to be repainted in response to this event.

Returns:

the rectangle representing the area which needs to be repainted in response to this event

setUpdateRect

public void setUpdateRect(Rectangle updateRect)

Sets the rectangle representing the area which needs to be repainted in response to this event.

Parameters:

updateRect - the rectangle area which needs to be repainted