Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class JDesktopPane - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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javax.swing
Class JDesktopPane

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

public class JDesktopPane
extends JLayeredPane
implements 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).

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.

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. A future release of Swing will provide support for long term persistence.

See Also:: JInternalFrame, JInternalFrame.JDesktopIcon, DesktopManager, Serialized Form

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)

getDesktopManager

public DesktopManager getDesktopManager()

Returns the DesktopManger that handles desktop-specific UI actions.

Parameters:: d - the DesktopManager currently in use

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:: "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

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()

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 AccessibleContext getAccessibleContext()

Get the AccessibleContext associated with this JComponent

Specified by:: getAccessibleContext in interface Accessible
Overrides:: getAccessibleContext in class JLayeredPane

Returns:: the AccessibleContext of this JComponent