javax.swing
Class JDesktopPane

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JLayeredPane
                  javax.swing.JDesktopPane

All Implemented Interfaces:

javax.accessibility.Accessible, ImageObserver, MenuContainer, Serializable

public class JDesktopPane

extends JLayeredPane

implements javax.accessibility.Accessible

A container used to create a multiple-document interface or a virtual desktop. You create JInternalFrame objects and add them to the JDesktopPane. JDesktopPane extends JLayeredPane to manage the potentially overlapping internal frames. It also maintains a reference to an instance of DesktopManager that is set by the UI class for the current look and feel (L&F). Note that JDesktopPane does not support borders.

This class is normally used as the parent of JInternalFrames to provide a pluggable DesktopManager object to the JInternalFrames. The installUI of the L&F specific implementation is responsible for setting the desktopManager variable appropriately. When the parent of a JInternalFrame is a JDesktopPane, it should delegate most of its behavior to the desktopManager (closing, resizing, etc).

For the keyboard keys used by this component in the standard look and feel (L&F) renditions, see the JDesktopPane key assignments. For further documentation and examples see How to Use Internal Frames, a section in The Java Tutorial.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see XMLEncoder.

Author:

David Kloba

See Also:

JInternalFrame, JInternalFrame.JDesktopIcon, DesktopManager, Serialized Form

Nested Class Summary

protected class

JDesktopPane.AccessibleJDesktopPane This class implements accessibility support for the JDesktopPane class.

Nested classes inherited from class javax.swing.JLayeredPane

JLayeredPane.AccessibleJLayeredPane

Nested classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent, JComponent.ActionStandin, JComponent.IntVector, JComponent.KeyboardState

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

(package private) DesktopManager	desktopManager
private int	dragMode
static int	LIVE_DRAG_MODE Indicates that the entire contents of the item being dragged should appear inside the desktop pane.
static int	OUTLINE_DRAG_MODE Indicates that an outline only of the item being dragged should appear inside the desktop pane.
private JInternalFrame	selectedFrame
private static String	uiClassID

Fields inherited from class javax.swing.JLayeredPane

DEFAULT_LAYER, DRAG_LAYER, FRAME_CONTENT_LAYER, LAYER_PROPERTY, MODAL_LAYER, PALETTE_LAYER, POPUP_LAYER

Fields inherited from class javax.swing.JComponent

_bounds, accessibleContext, listenerList, paintingChild, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Container

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

JDesktopPane()
Creates a new JDesktopPane.

Method Summary

javax.accessibility.AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this JDesktopPane.
JInternalFrame[]	getAllFrames() Returns all JInternalFrames currently displayed in the desktop.
JInternalFrame[]	getAllFramesInLayer(int layer) Returns all JInternalFrames currently displayed in the specified layer of the desktop.
DesktopManager	getDesktopManager() Returns the DesktopManger that handles desktop-specific UI actions.
int	getDragMode() Gets the current "dragging style" used by the desktop pane.
JInternalFrame	getSelectedFrame() Returns the currently active JInternalFrame in this JDesktopPane, or null if no JInternalFrame is currently active.
DesktopPaneUI	getUI() Returns the L&F object that renders this component.
String	getUIClassID() Returns the name of the L&F class that renders this component.
boolean	isOpaque() Returns true to indicate that this component paints every pixel in its range.
protected String	paramString() Returns a string representation of this JDesktopPane.
void	setDesktopManager(DesktopManager d) Sets the DesktopManger that will handle desktop-specific UI actions.
void	setDragMode(int dragMode) Sets the "dragging style" used by the desktop pane.
void	setSelectedFrame(JInternalFrame f) Sets the currently active JInternalFrame in this JDesktopPane.
void	setUI(DesktopPaneUI ui) Sets the L&F object that renders this component.
void	updateUI() Notification from the UIManager that the L&F has changed.
private void	writeObject(ObjectOutputStream s) See readObject() and writeObject() in JComponent for more information about serialization in Swing.

Methods inherited from class javax.swing.JLayeredPane

addImpl, getComponentCountInLayer, getComponentsInLayer, getComponentToLayer, getIndexOf, getLayer, getLayer, getLayeredPaneAbove, getObjectForLayer, getPosition, highestLayer, insertIndexForLayer, isOptimizedDrawingEnabled, lowestLayer, moveToBack, moveToFront, paint, putLayer, remove, setLayer, setLayer, setPosition

Methods inherited from class javax.swing.JComponent

_paintImmediately, addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, alwaysOnTop, checkIfChildObscuredBySibling, componentInputMapChanged, computeVisibleRect, computeVisibleRect, compWriteObjectNotify, contains, createToolTip, disable, enable, enableSerialization, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getCreatedDoubleBuffer, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getManagingFocusBackwardTraversalKeys, getManagingFocusForwardTraversalKeys, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getWriteObjCounter, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isPaintingOrigin, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyBindings, processKeyBindingsForAllComponents, processKeyEvent, processMouseMotionEvent, putClientProperty, rectangleIsObscured, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setCreatedDoubleBuffer, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPaintingChild, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, setWriteObjCounter, shouldDebugGraphics, superProcessMouseMotionEvent, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

uiClassID

private static final String uiClassID

See Also:

getUIClassID(), JComponent.readObject(java.io.ObjectInputStream), Constant Field Values

desktopManager

transient DesktopManager desktopManager

selectedFrame

private transient JInternalFrame selectedFrame

LIVE_DRAG_MODE

public static int LIVE_DRAG_MODE

Indicates that the entire contents of the item being dragged should appear inside the desktop pane.

See Also:

OUTLINE_DRAG_MODE, setDragMode(int)

OUTLINE_DRAG_MODE

public static int OUTLINE_DRAG_MODE

Indicates that an outline only of the item being dragged should appear inside the desktop pane.

See Also:

LIVE_DRAG_MODE, setDragMode(int)

dragMode

private int dragMode

Constructor Detail

JDesktopPane

public JDesktopPane()

Creates a new JDesktopPane.

Method Detail

getUI

public DesktopPaneUI getUI()

Returns the L&F object that renders this component.

Returns:

the DesktopPaneUI object that renders this component

setUI

public void setUI(DesktopPaneUI ui)

Sets the L&F object that renders this component.

Parameters:

ui - the DesktopPaneUI L&F object

See Also:

UIDefaults.getUI(javax.swing.JComponent)

setDragMode

public void setDragMode(int dragMode)

Sets the "dragging style" used by the desktop pane. You may want to change to one mode or another for performance or aesthetic reasons.

Parameters:

dragMode - the style of drag to use for items in the Desktop

See Also:

LIVE_DRAG_MODE, OUTLINE_DRAG_MODE

getDragMode

public int getDragMode()

Gets the current "dragging style" used by the desktop pane.

Returns:

either Live_DRAG_MODE or OUTLINE_DRAG_MODE

See Also:

setDragMode(int)

getDesktopManager

public DesktopManager getDesktopManager()

Returns the DesktopManger that handles desktop-specific UI actions.

setDesktopManager

public void setDesktopManager(DesktopManager d)

Sets the DesktopManger that will handle desktop-specific UI actions.

Parameters:

d - the DesktopManager to use

updateUI

public void updateUI()

Notification from the UIManager that the L&F has changed. Replaces the current UI object with the latest version from the UIManager.

Overrides:

updateUI in class JComponent

See Also:

JComponent.updateUI()

getUIClassID

public String getUIClassID()

Returns the name of the L&F class that renders this component.

Overrides:

getUIClassID in class JComponent

Returns:

the string "DesktopPaneUI"

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

getAllFrames

public JInternalFrame[] getAllFrames()

Returns all JInternalFrames currently displayed in the desktop. Returns iconified frames as well as expanded frames.

Returns:

an array of JInternalFrame objects

getSelectedFrame

public JInternalFrame getSelectedFrame()

Returns the currently active JInternalFrame in this JDesktopPane, or null if no JInternalFrame is currently active.

Returns:

the currently active JInternalFrame or null

Since:

1.3

setSelectedFrame

public void setSelectedFrame(JInternalFrame f)

Sets the currently active JInternalFrame in this JDesktopPane.

Parameters:

f - the internal frame that's currently selected

Since:

1.3

getAllFramesInLayer

public JInternalFrame[] getAllFramesInLayer(int layer)

Returns all JInternalFrames currently displayed in the specified layer of the desktop. Returns iconified frames as well expanded frames.

Parameters:

layer - an int specifying the desktop layer

Returns:

an array of JInternalFrame objects

See Also:

JLayeredPane

isOpaque

public boolean isOpaque()

Returns true to indicate that this component paints every pixel in its range. (In other words, it does not have a transparent background or foreground.)

Overrides:

isOpaque in class JComponent

Returns:

true

See Also:

JComponent.isOpaque()

writeObject

private void writeObject(ObjectOutputStream s)
                  throws IOException

See readObject() and writeObject() in JComponent for more information about serialization in Swing.

Throws:

IOException

paramString

protected String paramString()

Returns a string representation of this JDesktopPane. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overrides:

paramString in class JLayeredPane

Returns:

a string representation of this JDesktopPane

getAccessibleContext

public javax.accessibility.AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JDesktopPane. For desktop panes, the AccessibleContext takes the form of an AccessibleJDesktopPane. A new AccessibleJDesktopPane instance is created if necessary.

Specified by:

getAccessibleContext in interface javax.accessibility.Accessible

Overrides:

getAccessibleContext in class JLayeredPane

Returns:

an AccessibleJDesktopPane that serves as the AccessibleContext of this JDesktopPane