java.awt.image

Interface ImageObserver

Known Implementing Classes:
AbstractButton, AbstractColorChooserPanel, Applet, BasicArrowButton, BasicComboBoxRenderer, BasicComboBoxRenderer.UIResource, BasicComboPopup, BasicInternalFrameTitlePane, BasicInternalFrameTitlePane.SystemMenuBar, BasicSplitPaneDivider, BasicToolBarUI.DragWindow, Box, Box.Filler, Button, Canvas, CellRendererPane, Checkbox, Choice, Component, Container, DefaultListCellRenderer, DefaultListCellRenderer.UIResource, DefaultTableCellRenderer, DefaultTableCellRenderer.UIResource, DefaultTreeCellEditor.DefaultTextField, DefaultTreeCellEditor.EditorContainer, DefaultTreeCellRenderer, Dialog, EmbeddedWindow, FileDialog, Frame, ImageViewer, JApplet, JButton, JCheckBox, JCheckBoxMenuItem, JColorChooser, JComboBox, JComponent, JDesktopPane, JDialog, JEditorPane, JFileChooser, JFormattedTextField, JFrame, JInternalFrame, JInternalFrame.JDesktopIcon, JLabel, JLayeredPane, JList, JMenu, JMenuBar, JMenuItem, JOptionPane, JPanel, JPasswordField, JPopupMenu, JPopupMenu.Separator, JProgressBar, JRadioButton, JRadioButtonMenuItem, JRootPane, JScrollBar, JScrollPane, JScrollPane.ScrollBar, JSeparator, JSlider, JSpinner, JSpinner.DateEditor, JSpinner.DefaultEditor, JSpinner.ListEditor, JSpinner.NumberEditor, JSplitPane, JTabbedPane, JTable, JTableHeader, JTextArea, JTextComponent, JTextField, JTextPane, JToggleButton, JToolBar, JToolBar.Separator, JToolTip, JTree, JViewport, JWindow, Label, List, MetalComboBoxButton, MetalComboBoxUI.MetalComboPopup, MetalFileChooserUI.FileRenderer, MetalFileChooserUI.FilterComboBoxRenderer, MetalInternalFrameTitlePane, MetalScrollButton, Panel, PrinterDialog, Scrollbar, ScrollPane, TextArea, TextComponent, TextEditor, TextField, TextViewer, Window

public interface ImageObserver

An object implementing the ImageObserver interface can receive updates on image construction from an ImageProducer asynchronously.
See Also:
ImageProducer

Field Summary

static int
ABORT
Production of the image was aborted.
static int
ALLBITS
An image with a single frame, a static image, is complete.
static int
ERROR
An error was encountered while producing the image.
static int
FRAMEBITS
All the pixels needed to draw a complete frame of a multi-frame image are available.
static int
HEIGHT
The height of the image has been provided as the height argument to imageUpdate.
static int
PROPERTIES
The properties of the image have been provided.
static int
SOMEBITS
More pixels are now available for drawing a scaled variation of the image.
static int
WIDTH
The width of the image has been provided as the width argument to imageUpdate.

Method Summary

boolean
imageUpdate(Image image, int flags, int x, int y, int width, int height)
This is a callback method for an asynchronous image producer to provide updates on the production of the image as it happens.

Field Details

ABORT

public static final int ABORT
Production of the image was aborted.
Field Value:
128

ALLBITS

public static final int ALLBITS
An image with a single frame, a static image, is complete.
Field Value:
32

ERROR

public static final int ERROR
An error was encountered while producing the image.
Field Value:
64

FRAMEBITS

public static final int FRAMEBITS
All the pixels needed to draw a complete frame of a multi-frame image are available.
Field Value:
16

HEIGHT

public static final int HEIGHT
The height of the image has been provided as the height argument to imageUpdate.
Field Value:
2

PROPERTIES

public static final int PROPERTIES
The properties of the image have been provided.
Field Value:
4

SOMEBITS

public static final int SOMEBITS
More pixels are now available for drawing a scaled variation of the image.
Field Value:
8

WIDTH

public static final int WIDTH
The width of the image has been provided as the width argument to imageUpdate.
Field Value:
1

Method Details

imageUpdate

public boolean imageUpdate(Image image,
                           int flags,
                           int x,
                           int y,
                           int width,
                           int height)
This is a callback method for an asynchronous image producer to provide updates on the production of the image as it happens.
Parameters:
image - the image the update refers to
flags - a bit mask indicating what is provided with this update
x - the x coordinate of the image
y - the y coordinate of the image
width - the width of the image
height - the height of the image
See Also:
Image

ImageObserver.java -- Java interface for asynchronous updates to an image Copyright (C) 1999 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.