Module java.desktop

Interface ImageObserver

All 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, FileDialog, Frame, JApplet, JButton, JCheckBox, JCheckBoxMenuItem, JColorChooser, JComboBox, JComponent, JDesktopPane, JDialog, JEditorPane, JFileChooser, JFormattedTextField, JFrame, JInternalFrame, JInternalFrame.JDesktopIcon, JLabel, JLayer, 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, Scrollbar, ScrollPane, TextArea, TextComponent, TextField, Window

public interface ImageObserver
An asynchronous update interface for receiving notifications about Image information as the Image is constructed.
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    This flag in the infoflags argument to imageUpdate indicates that an image which was being tracked asynchronously was aborted before production was complete.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that a static image which was previously drawn is now complete and can be drawn again in its final form.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that an image which was being tracked asynchronously has encountered an error.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that another complete frame of a multi-frame image which was previously drawn is now available to be drawn again.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that the height of the base image is now available and can be taken from the height argument to the imageUpdate callback method.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that the properties of the image are now available.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that more pixels needed for drawing a scaled variation of the image are available.
    static final int
    This flag in the infoflags argument to imageUpdate indicates that the width of the base image is now available and can be taken from the width argument to the imageUpdate callback method.
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    imageUpdate​(Image img, int infoflags, int x, int y, int width, int height)
    This method is called when information about an image which was previously requested using an asynchronous interface becomes available.