Class DefaultDesktopManager

All Implemented Interfaces:
Serializable, DesktopManager 
public class DefaultDesktopManager
extends Object
implements DesktopManager, Serializable

This is an implementation of the DesktopManager. It currently implements the basic behaviors for managing JInternalFrames in an arbitrary parent. JInternalFrames that are not children of a JDesktop will use this component to handle their desktop-like actions.

This class provides a policy for the various JInternalFrame methods, it is not meant to be called directly rather the various JInternalFrame methods will call into the DesktopManager.

Since:
1.2
See Also:
JDesktopPane, JInternalFrame, Serialized Form

Constructors

Constructor Description
DefaultDesktopManager()

Methods

Modifier and Type Method Description
void activateFrame​(JInternalFrame f)

This will activate f moving it to the front.
void closeFrame​(JInternalFrame f)

Removes the frame, and, if necessary, the desktopIcon, from its parent.
void deiconifyFrame​(JInternalFrame f)

Removes the desktopIcon from its parent and adds its frame to the parent.
void dragFrame​(JComponent f, int newX, int newY)

Moves the visible location of the frame being dragged to the location specified.
protected Rectangle getBoundsForIconOf​(JInternalFrame f)

The iconifyFrame() code calls this to determine the proper bounds for the desktopIcon.
protected Rectangle getPreviousBounds​(JInternalFrame f)

Gets the normal bounds of the component prior to the component being maximized.
void iconifyFrame​(JInternalFrame f)

Removes the frame from its parent and adds its desktopIcon to the parent.
void maximizeFrame​(JInternalFrame f)

Resizes the frame to fill its parents bounds.
void minimizeFrame​(JInternalFrame f)

Restores the frame back to its size and position prior to a maximizeFrame call.
void openFrame​(JInternalFrame f)

Normally this method will not be called.
protected void removeIconFor​(JInternalFrame f)

Convenience method to remove the desktopIcon of f is necessary.
void resizeFrame​(JComponent f, int newX, int newY, int newWidth, int newHeight)

Calls setBoundsForFrame with the new values.
void setBoundsForFrame​(JComponent f, int newX, int newY, int newWidth, int newHeight)

This moves the JComponent and repaints the damaged areas.
protected void setPreviousBounds​(JInternalFrame f, Rectangle r)

Stores the bounds of the component just before a maximize call.
protected void setWasIcon​(JInternalFrame f, Boolean value)

Sets that the component has been iconized and the bounds of the desktopIcon are valid.
protected boolean wasIcon​(JInternalFrame f)

Returns true if the component has been iconized and the bounds of the desktopIcon are valid, otherwise returns false.

Methods declared in class java.lang.Object

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

Methods declared in interface javax.swing.DesktopManager

beginDraggingFrame, beginResizingFrame, deactivateFrame, endDraggingFrame, endResizingFrame

Constructors

DefaultDesktopManager

public DefaultDesktopManager()

Methods

openFrame

public void openFrame(JInternalFrame f)

Normally this method will not be called. If it is, it tries to determine the appropriate parent from the desktopIcon of the frame. Will remove the desktopIcon from its parent if it successfully adds the frame.

Specified by:
openFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be displayed

closeFrame

public void closeFrame(JInternalFrame f)

Removes the frame, and, if necessary, the desktopIcon, from its parent.

Specified by:
closeFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be removed

maximizeFrame

public void maximizeFrame(JInternalFrame f)

Resizes the frame to fill its parents bounds.

Specified by:
maximizeFrame in interface DesktopManager
Parameters:
f - the frame to be resized

minimizeFrame

public void minimizeFrame(JInternalFrame f)

Restores the frame back to its size and position prior to a maximizeFrame call.

Specified by:
minimizeFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be restored

iconifyFrame

public void iconifyFrame(JInternalFrame f)

Removes the frame from its parent and adds its desktopIcon to the parent.

Specified by:
iconifyFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be iconified

deiconifyFrame

public void deiconifyFrame(JInternalFrame f)

Removes the desktopIcon from its parent and adds its frame to the parent.

Specified by:
deiconifyFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be de-iconified

activateFrame

public void activateFrame(JInternalFrame f)

This will activate f moving it to the front. It will set the current active frame's (if any) IS_SELECTED_PROPERTY to false. There can be only one active frame across all Layers.

Specified by:
activateFrame in interface DesktopManager
Parameters:
f - the JInternalFrame to be activated

dragFrame

public void dragFrame(JComponent f,
                      int newX,
                      int newY)

Moves the visible location of the frame being dragged to the location specified. The means by which this occurs can vary depending on the dragging algorithm being used. The actual logical location of the frame might not change until endDraggingFrame is called.

Specified by:
dragFrame in interface DesktopManager
Parameters:
f - the JComponent being dragged
newX - the new x-coordinate
newY - the new y-coordinate

resizeFrame

public void resizeFrame(JComponent f,
                        int newX,
                        int newY,
                        int newWidth,
                        int newHeight)

Calls setBoundsForFrame with the new values.

Specified by:
resizeFrame in interface DesktopManager
Parameters:
f - the component to be resized
newX - the new x-coordinate
newY - the new y-coordinate
newWidth - the new width
newHeight - the new height

setBoundsForFrame

public void setBoundsForFrame(JComponent f,
                              int newX,
                              int newY,
                              int newWidth,
                              int newHeight)

This moves the JComponent and repaints the damaged areas.

Specified by:
setBoundsForFrame in interface DesktopManager
Parameters:
f - the JComponent being moved or resized
newX - the new x-coordinate
newY - the new y-coordinate
newWidth - the new width
newHeight - the new height

removeIconFor

protected void removeIconFor(JInternalFrame f)

Convenience method to remove the desktopIcon of f is necessary.

Parameters:
f - the JInternalFrame for which to remove the desktopIcon

getBoundsForIconOf

protected Rectangle getBoundsForIconOf(JInternalFrame f)

The iconifyFrame() code calls this to determine the proper bounds for the desktopIcon.

Parameters:
f - the JInternalFrame of interest
Returns:
a Rectangle containing bounds for the desktopIcon

setPreviousBounds

protected void setPreviousBounds(JInternalFrame f,
                                 Rectangle r)

Stores the bounds of the component just before a maximize call.

Parameters:
f - the component about to be resized
r - the normal bounds to be saved away

getPreviousBounds

protected Rectangle getPreviousBounds(JInternalFrame f)

Gets the normal bounds of the component prior to the component being maximized.

Parameters:
f - the JInternalFrame of interest
Returns:
the normal bounds of the component

setWasIcon

protected void setWasIcon(JInternalFrame f,
                          Boolean value)

Sets that the component has been iconized and the bounds of the desktopIcon are valid.

Parameters:
f - the JInternalFrame of interest
value - a Boolean signifying if component has been iconized

wasIcon

protected boolean wasIcon(JInternalFrame f)

Returns true if the component has been iconized and the bounds of the desktopIcon are valid, otherwise returns false.

Parameters:
f - the JInternalFrame of interest
Returns:
true if the component has been iconized; otherwise returns false

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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/DefaultDesktopManager.html