8186617: The "com.sun.awt.AWTUtilities" class can be dropped in favour of public API
Reviewed-by: azvegint, prr
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javax.swing;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.beans.PropertyVetoException;
import sun.awt.AWTAccessor;
import sun.awt.SunToolkit;
/** This is an implementation of the <code>DesktopManager</code>.
* It currently implements the basic behaviors for managing
* <code>JInternalFrame</code>s in an arbitrary parent.
* <code>JInternalFrame</code>s that are not children of a
* <code>JDesktop</code> will use this component
* to handle their desktop-like actions.
* <p>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.</p>
* @see JDesktopPane
* @see JInternalFrame
* @author David Kloba
* @author Steve Wilson
* @since 1.2
*/
@SuppressWarnings("serial") // No Interesting Non-Transient State
public class DefaultDesktopManager implements DesktopManager, java.io.Serializable {
static final String HAS_BEEN_ICONIFIED_PROPERTY = "wasIconOnce";
static final int DEFAULT_DRAG_MODE = 0;
static final int OUTLINE_DRAG_MODE = 1;
static final int FASTER_DRAG_MODE = 2;
int dragMode = DEFAULT_DRAG_MODE;
private transient Rectangle currentBounds = null;
private transient Graphics desktopGraphics = null;
private transient Rectangle desktopBounds = null;
private transient Rectangle[] floatingItems = {};
/**
* Set to true when the user actually drags a frame vs clicks on it
* to start the drag operation. This is only used when dragging with
* FASTER_DRAG_MODE.
*/
private transient boolean didDrag;
/** 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.
*/
public void openFrame(JInternalFrame f) {
if(f.getDesktopIcon().getParent() != null) {
f.getDesktopIcon().getParent().add(f);
removeIconFor(f);
}
}
/**
* Removes the frame, and, if necessary, the
* <code>desktopIcon</code>, from its parent.
* @param f the <code>JInternalFrame</code> to be removed
*/
public void closeFrame(JInternalFrame f) {
JDesktopPane d = f.getDesktopPane();
if (d == null) {
return;
}
boolean findNext = f.isSelected();
Container c = f.getParent();
JInternalFrame nextFrame = null;
if (findNext) {
nextFrame = d.getNextFrame(f);
try { f.setSelected(false); } catch (PropertyVetoException e2) { }
}
if(c != null) {
c.remove(f); // Removes the focus.
c.repaint(f.getX(), f.getY(), f.getWidth(), f.getHeight());
}
removeIconFor(f);
if(f.getNormalBounds() != null)
f.setNormalBounds(null);
if(wasIcon(f))
setWasIcon(f, null);
if (nextFrame != null) {
try { nextFrame.setSelected(true); }
catch (PropertyVetoException e2) { }
} else if (findNext && d.getComponentCount() == 0) {
// It was selected and was the last component on the desktop.
d.requestFocus();
}
}
/**
* Resizes the frame to fill its parents bounds.
* @param f the frame to be resized
*/
public void maximizeFrame(JInternalFrame f) {
if (f.isIcon()) {
try {
// In turn calls deiconifyFrame in the desktop manager.
// That method will handle the maximization of the frame.
f.setIcon(false);
} catch (PropertyVetoException e2) {
}
} else {
Container c = f.getParent();
if (c == null) {
return;
}
f.setNormalBounds(f.getBounds());
Rectangle desktopBounds = c.getBounds();
setBoundsForFrame(f, 0, 0,
desktopBounds.width, desktopBounds.height);
}
// Set the maximized frame as selected.
try {
f.setSelected(true);
} catch (PropertyVetoException e2) {
}
}
/**
* Restores the frame back to its size and position prior
* to a <code>maximizeFrame</code> call.
* @param f the <code>JInternalFrame</code> to be restored
*/
public void minimizeFrame(JInternalFrame f) {
// If the frame was an icon restore it back to an icon.
if (f.isIcon()) {
iconifyFrame(f);
return;
}
if ((f.getNormalBounds()) != null) {
Rectangle r = f.getNormalBounds();
f.setNormalBounds(null);
try { f.setSelected(true); } catch (PropertyVetoException e2) { }
setBoundsForFrame(f, r.x, r.y, r.width, r.height);
}
}
/**
* Removes the frame from its parent and adds its
* <code>desktopIcon</code> to the parent.
* @param f the <code>JInternalFrame</code> to be iconified
*/
public void iconifyFrame(JInternalFrame f) {
JInternalFrame.JDesktopIcon desktopIcon;
Container c = f.getParent();
JDesktopPane d = f.getDesktopPane();
boolean findNext = f.isSelected();
desktopIcon = f.getDesktopIcon();
if(!wasIcon(f)) {
Rectangle r = getBoundsForIconOf(f);
desktopIcon.setBounds(r.x, r.y, r.width, r.height);
// we must validate the hierarchy to not break the hw/lw mixing
desktopIcon.revalidate();
setWasIcon(f, Boolean.TRUE);
}
if (c == null || d == null) {
return;
}
if (c instanceof JLayeredPane) {
JLayeredPane lp = (JLayeredPane)c;
int layer = JLayeredPane.getLayer(f);
JLayeredPane.putLayer(desktopIcon, layer);
}
d.setComponentOrderCheckingEnabled(true);
c.remove(f);
c.add(desktopIcon);
if (findNext) {
if (d.selectFrame(true) == null) {
// The icon is the last frame.
f.restoreSubcomponentFocus();
}
}
c.repaint(f.getX(), f.getY(), f.getWidth(), f.getHeight());
}
/**
* Removes the desktopIcon from its parent and adds its frame
* to the parent.
* @param f the <code>JInternalFrame</code> to be de-iconified
*/
public void deiconifyFrame(JInternalFrame f) {
JInternalFrame.JDesktopIcon desktopIcon = f.getDesktopIcon();
Container c = desktopIcon.getParent();
JDesktopPane d = f.getDesktopPane();
if (c != null && d != null) {
c.add(f);
// If the frame is to be restored to a maximized state make
// sure it still fills the whole desktop.
if (f.isMaximum()) {
Rectangle desktopBounds = c.getBounds();
if (f.getWidth() != desktopBounds.width ||
f.getHeight() != desktopBounds.height) {
setBoundsForFrame(f, 0, 0,
desktopBounds.width, desktopBounds.height);
}
}
removeIconFor(f);
if (f.isSelected()) {
f.moveToFront();
f.restoreSubcomponentFocus();
}
else {
try {
f.setSelected(true);
} catch (PropertyVetoException e2) {}
}
}
}
/** This will activate <b>f</b> moving it to the front. It will
* set the current active frame's (if any)
* <code>IS_SELECTED_PROPERTY</code> to <code>false</code>.
* There can be only one active frame across all Layers.
* @param f the <code>JInternalFrame</code> to be activated
*/
public void activateFrame(JInternalFrame f) {
Container p = f.getParent();
Component[] c;
JDesktopPane d = f.getDesktopPane();
JInternalFrame currentlyActiveFrame =
(d == null) ? null : d.getSelectedFrame();
// fix for bug: 4162443
if(p == null) {
// If the frame is not in parent, its icon maybe, check it
p = f.getDesktopIcon().getParent();
if(p == null)
return;
}
// we only need to keep track of the currentActive InternalFrame, if any
if (currentlyActiveFrame == null){
if (d != null) { d.setSelectedFrame(f);}
} else if (currentlyActiveFrame != f) {
// if not the same frame as the current active
// we deactivate the current
if (currentlyActiveFrame.isSelected()) {
try {
currentlyActiveFrame.setSelected(false);
}
catch(PropertyVetoException e2) {}
}
if (d != null) { d.setSelectedFrame(f);}
}
f.moveToFront();
}
// implements javax.swing.DesktopManager
public void deactivateFrame(JInternalFrame f) {
JDesktopPane d = f.getDesktopPane();
JInternalFrame currentlyActiveFrame =
(d == null) ? null : d.getSelectedFrame();
if (currentlyActiveFrame == f)
d.setSelectedFrame(null);
}
// implements javax.swing.DesktopManager
public void beginDraggingFrame(JComponent f) {
setupDragMode(f);
if (dragMode == FASTER_DRAG_MODE) {
Component desktop = f.getParent();
floatingItems = findFloatingItems(f);
currentBounds = f.getBounds();
if (desktop instanceof JComponent) {
desktopBounds = ((JComponent)desktop).getVisibleRect();
}
else {
desktopBounds = desktop.getBounds();
desktopBounds.x = desktopBounds.y = 0;
}
desktopGraphics = JComponent.safelyGetGraphics(desktop);
((JInternalFrame)f).isDragging = true;
didDrag = false;
}
}
private void setupDragMode(JComponent f) {
JDesktopPane p = getDesktopPane(f);
Container parent = f.getParent();
dragMode = DEFAULT_DRAG_MODE;
if (p != null) {
String mode = (String)p.getClientProperty("JDesktopPane.dragMode");
Window window = SwingUtilities.getWindowAncestor(f);
if (window != null && !window.isOpaque()) {
dragMode = DEFAULT_DRAG_MODE;
} else if (mode != null && mode.equals("outline")) {
dragMode = OUTLINE_DRAG_MODE;
} else if (mode != null && mode.equals("faster")
&& f instanceof JInternalFrame
&& ((JInternalFrame)f).isOpaque() &&
(parent == null || parent.isOpaque())) {
dragMode = FASTER_DRAG_MODE;
} else {
if (p.getDragMode() == JDesktopPane.OUTLINE_DRAG_MODE ) {
dragMode = OUTLINE_DRAG_MODE;
} else if ( p.getDragMode() == JDesktopPane.LIVE_DRAG_MODE
&& f instanceof JInternalFrame
&& ((JInternalFrame)f).isOpaque()) {
dragMode = FASTER_DRAG_MODE;
} else {
dragMode = DEFAULT_DRAG_MODE;
}
}
}
}
private transient Point currentLoc = null;
/**
* 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 <code>endDraggingFrame</code> is called.
*/
public void dragFrame(JComponent f, int newX, int newY) {
if (dragMode == OUTLINE_DRAG_MODE) {
JDesktopPane desktopPane = getDesktopPane(f);
if (desktopPane != null){
Graphics g = JComponent.safelyGetGraphics(desktopPane);
g.setXORMode(Color.white);
if (currentLoc != null) {
g.drawRect(currentLoc.x, currentLoc.y,
f.getWidth()-1, f.getHeight()-1);
}
g.drawRect( newX, newY, f.getWidth()-1, f.getHeight()-1);
/* Work around for 6635462: XOR mode may cause a SurfaceLost on first use.
* Swing doesn't expect that its XOR drawRect did
* not complete, so believes that on re-entering at
* the next update location, that there is an XOR rect
* to draw out at "currentLoc". But in fact
* its now got a new clean surface without that rect,
* so drawing it "out" in fact draws it on, leaving garbage.
* So only update/set currentLoc if the draw completed.
*/
sun.java2d.SurfaceData sData =
((sun.java2d.SunGraphics2D)g).getSurfaceData();
if (!sData.isSurfaceLost()) {
currentLoc = new Point (newX, newY);
}
;
g.dispose();
}
} else if (dragMode == FASTER_DRAG_MODE) {
dragFrameFaster(f, newX, newY);
} else {
setBoundsForFrame(f, newX, newY, f.getWidth(), f.getHeight());
}
}
// implements javax.swing.DesktopManager
public void endDraggingFrame(JComponent f) {
if ( dragMode == OUTLINE_DRAG_MODE && currentLoc != null) {
setBoundsForFrame(f, currentLoc.x, currentLoc.y, f.getWidth(), f.getHeight() );
currentLoc = null;
} else if (dragMode == FASTER_DRAG_MODE) {
currentBounds = null;
if (desktopGraphics != null) {
desktopGraphics.dispose();
desktopGraphics = null;
}
desktopBounds = null;
((JInternalFrame)f).isDragging = false;
}
}
// implements javax.swing.DesktopManager
public void beginResizingFrame(JComponent f, int direction) {
setupDragMode(f);
}
/**
* Calls <code>setBoundsForFrame</code> with the new values.
* @param f the component to be resized
* @param newX the new x-coordinate
* @param newY the new y-coordinate
* @param newWidth the new width
* @param newHeight the new height
*/
public void resizeFrame(JComponent f, int newX, int newY, int newWidth, int newHeight) {
if ( dragMode == DEFAULT_DRAG_MODE || dragMode == FASTER_DRAG_MODE ) {
setBoundsForFrame(f, newX, newY, newWidth, newHeight);
} else {
JDesktopPane desktopPane = getDesktopPane(f);
if (desktopPane != null){
Graphics g = JComponent.safelyGetGraphics(desktopPane);
g.setXORMode(Color.white);
if (currentBounds != null) {
g.drawRect( currentBounds.x, currentBounds.y, currentBounds.width-1, currentBounds.height-1);
}
g.drawRect( newX, newY, newWidth-1, newHeight-1);
// Work around for 6635462, see comment in dragFrame()
sun.java2d.SurfaceData sData =
((sun.java2d.SunGraphics2D)g).getSurfaceData();
if (!sData.isSurfaceLost()) {
currentBounds = new Rectangle (newX, newY, newWidth, newHeight);
}
g.setPaintMode();
g.dispose();
}
}
}
// implements javax.swing.DesktopManager
public void endResizingFrame(JComponent f) {
if ( dragMode == OUTLINE_DRAG_MODE && currentBounds != null) {
setBoundsForFrame(f, currentBounds.x, currentBounds.y, currentBounds.width, currentBounds.height );
currentBounds = null;
}
}
/** This moves the <code>JComponent</code> and repaints the damaged areas. */
public void setBoundsForFrame(JComponent f, int newX, int newY, int newWidth, int newHeight) {
f.setBounds(newX, newY, newWidth, newHeight);
// we must validate the hierarchy to not break the hw/lw mixing
f.revalidate();
}
/**
* Convenience method to remove the desktopIcon of <b>f</b> is necessary.
*
* @param f the {@code JInternalFrame} for which to remove the
* {@code desktopIcon}
*/
protected void removeIconFor(JInternalFrame f) {
JInternalFrame.JDesktopIcon di = f.getDesktopIcon();
Container c = di.getParent();
if(c != null) {
c.remove(di);
c.repaint(di.getX(), di.getY(), di.getWidth(), di.getHeight());
}
}
/**
* The {@code iconifyFrame()} code calls this to determine the proper bounds
* for the desktopIcon.
*
* @param f the {@code JInternalFrame} of interest
* @return a {@code Rectangle} containing bounds for the {@code desktopIcon}
*/
protected Rectangle getBoundsForIconOf(JInternalFrame f) {
//
// Get the icon for this internal frame and its preferred size
//
JInternalFrame.JDesktopIcon icon = f.getDesktopIcon();
Dimension prefSize = icon.getPreferredSize();
//
// Get the parent bounds and child components.
//
Container c = f.getParent();
if (c == null) {
c = f.getDesktopIcon().getParent();
}
if (c == null) {
/* the frame has not yet been added to the parent; how about (0,0) ?*/
return new Rectangle(0, 0, prefSize.width, prefSize.height);
}
Rectangle parentBounds = c.getBounds();
Component [] components = c.getComponents();
//
// Iterate through valid default icon locations and return the
// first one that does not intersect any other icons.
//
Rectangle availableRectangle = null;
JInternalFrame.JDesktopIcon currentIcon = null;
int x = 0;
int y = parentBounds.height - prefSize.height;
int w = prefSize.width;
int h = prefSize.height;
boolean found = false;
while (!found) {
availableRectangle = new Rectangle(x,y,w,h);
found = true;
for ( int i=0; i<components.length; i++ ) {
//
// Get the icon for this component
//
if ( components[i] instanceof JInternalFrame ) {
currentIcon = ((JInternalFrame)components[i]).getDesktopIcon();
}
else if ( components[i] instanceof JInternalFrame.JDesktopIcon ){
currentIcon = (JInternalFrame.JDesktopIcon)components[i];
} else
/* found a child that's neither an internal frame nor
an icon. I don't believe this should happen, but at
present it does and causes a null pointer exception.
Even when that gets fixed, this code protects against
the npe. hania */
continue;
//
// If this icon intersects the current location, get next location.
//
if ( !currentIcon.equals(icon) ) {
if ( availableRectangle.intersects(currentIcon.getBounds()) ) {
found = false;
break;
}
}
}
if (currentIcon == null)
/* didn't find any useful children above. This probably shouldn't
happen, but this check protects against an npe if it ever does
(and it's happening now) */
return availableRectangle;
x += currentIcon.getBounds().width;
if ( x + w > parentBounds.width ) {
x = 0;
y -= h;
}
}
return(availableRectangle);
}
/**
* Stores the bounds of the component just before a maximize call.
* @param f the component about to be resized
* @param r the normal bounds to be saved away
*/
protected void setPreviousBounds(JInternalFrame f, Rectangle r) {
f.setNormalBounds(r);
}
/**
* Gets the normal bounds of the component prior to the component
* being maximized.
* @param f the <code>JInternalFrame</code> of interest
* @return the normal bounds of the component
*/
protected Rectangle getPreviousBounds(JInternalFrame f) {
return f.getNormalBounds();
}
/**
* Sets that the component has been iconized and the bounds of the
* <code>desktopIcon</code> are valid.
*
* @param f the {@code JInternalFrame} of interest
* @param value a {@code Boolean} signifying if component has been iconized
*/
protected void setWasIcon(JInternalFrame f, Boolean value) {
if (value != null) {
f.putClientProperty(HAS_BEEN_ICONIFIED_PROPERTY, value);
}
}
/**
* Returns <code>true</code> if the component has been iconized
* and the bounds of the <code>desktopIcon</code> are valid,
* otherwise returns <code>false</code>.
*
* @param f the <code>JInternalFrame</code> of interest
* @return <code>true</code> if the component has been iconized;
* otherwise returns <code>false</code>
*/
protected boolean wasIcon(JInternalFrame f) {
return (f.getClientProperty(HAS_BEEN_ICONIFIED_PROPERTY) == Boolean.TRUE);
}
JDesktopPane getDesktopPane( JComponent frame ) {
JDesktopPane pane = null;
Component c = frame.getParent();
// Find the JDesktopPane
while ( pane == null ) {
if ( c instanceof JDesktopPane ) {
pane = (JDesktopPane)c;
}
else if ( c == null ) {
break;
}
else {
c = c.getParent();
}
}
return pane;
}
// =========== stuff for faster frame dragging ===================
private void dragFrameFaster(JComponent f, int newX, int newY) {
Rectangle previousBounds = new Rectangle(currentBounds.x,
currentBounds.y,
currentBounds.width,
currentBounds.height);
// move the frame
currentBounds.x = newX;
currentBounds.y = newY;
if (didDrag) {
// Only initiate cleanup if we have actually done a drag.
emergencyCleanup(f);
}
else {
didDrag = true;
// We reset the danger field as until now we haven't actually
// moved the internal frame so we don't need to initiate repaint.
((JInternalFrame)f).danger = false;
}
boolean floaterCollision = isFloaterCollision(previousBounds, currentBounds);
JComponent parent = (JComponent)f.getParent();
Rectangle visBounds = previousBounds.intersection(desktopBounds);
RepaintManager currentManager = RepaintManager.currentManager(f);
currentManager.beginPaint();
try {
if(!floaterCollision) {
currentManager.copyArea(parent, desktopGraphics, visBounds.x,
visBounds.y,
visBounds.width,
visBounds.height,
newX - previousBounds.x,
newY - previousBounds.y,
true);
}
f.setBounds(currentBounds);
if (!floaterCollision) {
Rectangle r = currentBounds;
currentManager.notifyRepaintPerformed(parent, r.x, r.y, r.width, r.height);
}
if(floaterCollision) {
// since we couldn't blit we just redraw as fast as possible
// the isDragging mucking is to avoid activating emergency
// cleanup
((JInternalFrame)f).isDragging = false;
parent.paintImmediately(currentBounds);
((JInternalFrame)f).isDragging = true;
}
// fake out the repaint manager. We'll take care of everything
currentManager.markCompletelyClean(parent);
currentManager.markCompletelyClean(f);
// compute the minimal newly exposed area
// if the rects intersect then we use computeDifference. Otherwise
// we'll repaint the entire previous bounds
Rectangle[] dirtyRects = null;
if ( previousBounds.intersects(currentBounds) ) {
dirtyRects = SwingUtilities.computeDifference(previousBounds,
currentBounds);
} else {
dirtyRects = new Rectangle[1];
dirtyRects[0] = previousBounds;
};
// Fix the damage
for (int i = 0; i < dirtyRects.length; i++) {
parent.paintImmediately(dirtyRects[i]);
Rectangle r = dirtyRects[i];
currentManager.notifyRepaintPerformed(parent, r.x, r.y, r.width, r.height);
}
// new areas of blit were exposed
if ( !(visBounds.equals(previousBounds)) ) {
dirtyRects = SwingUtilities.computeDifference(previousBounds,
desktopBounds);
for (int i = 0; i < dirtyRects.length; i++) {
dirtyRects[i].x += newX - previousBounds.x;
dirtyRects[i].y += newY - previousBounds.y;
((JInternalFrame)f).isDragging = false;
parent.paintImmediately(dirtyRects[i]);
((JInternalFrame)f).isDragging = true;
Rectangle r = dirtyRects[i];
currentManager.notifyRepaintPerformed(parent, r.x, r.y, r.width, r.height);
}
}
} finally {
currentManager.endPaint();
}
// update window if it's non-opaque
Window topLevel = SwingUtilities.getWindowAncestor(f);
Toolkit tk = Toolkit.getDefaultToolkit();
if (!topLevel.isOpaque() &&
(tk instanceof SunToolkit) &&
((SunToolkit)tk).needUpdateWindow())
{
AWTAccessor.getWindowAccessor().updateWindow(topLevel);
}
}
private boolean isFloaterCollision(Rectangle moveFrom, Rectangle moveTo) {
if (floatingItems.length == 0) {
// System.out.println("no floaters");
return false;
}
for (int i = 0; i < floatingItems.length; i++) {
boolean intersectsFrom = moveFrom.intersects(floatingItems[i]);
if (intersectsFrom) {
return true;
}
boolean intersectsTo = moveTo.intersects(floatingItems[i]);
if (intersectsTo) {
return true;
}
}
return false;
}
private Rectangle[] findFloatingItems(JComponent f) {
Container desktop = f.getParent();
Component[] children = desktop.getComponents();
int i = 0;
for (i = 0; i < children.length; i++) {
if (children[i] == f) {
break;
}
}
// System.out.println(i);
Rectangle[] floaters = new Rectangle[i];
for (i = 0; i < floaters.length; i++) {
floaters[i] = children[i].getBounds();
}
return floaters;
}
/**
* This method is here to clean up problems associated
* with a race condition which can occur when the full contents
* of a copyArea's source argument is not available onscreen.
* This uses brute force to clean up in case of possible damage
*/
private void emergencyCleanup(final JComponent f) {
if ( ((JInternalFrame)f).danger ) {
SwingUtilities.invokeLater( new Runnable(){
public void run(){
((JInternalFrame)f).isDragging = false;
f.paintImmediately(0,0,
f.getWidth(),
f.getHeight());
//finalFrame.repaint();
((JInternalFrame)f).isDragging = true;
// System.out.println("repair complete");
}});
((JInternalFrame)f).danger = false;
}
}
}