[Chapter 21] PaintEvent

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| Chapter 21 java.awt.event Reference |

# PaintEvent

## Name

PaintEvent

##

## Description

The `PaintEvent` class represents the paint and update operations that the AWT performs on components. There is no `PaintListener` interface, so the only way to catch these events is to override `paint(Graphics)` and `update(Graphics)` in `Component`. This class exists so that paint events will get serialized properly.

## Class Definition

    public class java.awt.event.PaintEvent
       extends java.awt.event.ComponentEvent {
      // Constants
      public final static int PAINT;
      public final static int PAINT_FIRST;
      public final static int PAINT_LAST;
      public final static int UPDATE;
      // Constructor
      public PaintEvent (Component source, int id, Rectangle updateRect);
      // Instance Methods
      public Rectangle getUpdateRect();
      public String paramString();
      public void setUpdateRect (Rectangle updateRect);
    }

## Class Definition

    public class java.awt.event.PaintEvent
            extends java.awt.event.ComponentEvent {
      // Constants
      public final static int PAINT;
      public final static int PAINT_FIRST;
      public final static int PAINT_LAST;
      public final static int UPDATE;
      //Constructor
      public PaintEvent (Component source, int id, Rectangle updateRect);
      // Instance Methods
      public Rectangle getUpdateRect();
      public String paramString();
      public void setUpdateRect (Rectangle updateRect);
    }

## Constants

### PAINT

#### public final static int PAINT

The paint event type.

### PAINT_FIRST

#### public final static int PAINT_FIRST

Specifies the beginning range of paint event ID values.

### PAINT_LAST

#### public final static int PAINT_LAST

Specifies the ending range of paint event ID values.

### UPDATE

#### public final static int UPDATE

The update event type.

## Constructor

### PaintEvent

#### public PaintEvent (Component source, ind id, Rectangle updateRect)

Parameters

  source

    The source of the event.

  id

    The event type ID.

  g

    The rectangular area to paint.

Description

  Constructs a `PaintEvent` with the given characteristics.

## Instance Methods

### getUpdateRect

#### public Rectangle getUpdateRect()

Returns

  The rectangular area that needs painting.

### paramString

#### public String paramString()

Returns

  String with current settings of the `PaintEvent`.

Overrides

  `ComponentEvent``.paramString()`

Description

  Helper method for `toString()` to generate string of current settings.

### setUpdateRect

#### public void setUpdateRect (Rectangle updateRect)

Parameters

  updateRect

    The rectangular area to paint.

Description

  Changes the rectangular area that this `PaintEvent` will paint.

## See Also

`Component`, `ComponentEvent`, `Graphics`

MouseMotionListener |  | TextEvent