/* * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.swing; import javax.swing.event.*;import java.awt.event.*; import java.awt.Component;import java.awt.Container;import java.awt.Window;import java.beans.PropertyChangeListener;import java.beans.PropertyChangeEvent; import java.io.Serializable; /** * @author Dave Moore */ class AncestorNotifier implements ComponentListener, PropertyChangeListener, Serializable{ Component firstInvisibleAncestor; EventListenerList listenerList = new EventListenerList(); JComponent root; AncestorNotifier(JComponent root) { this.root = root; addListeners(root, true); } void addAncestorListener(AncestorListener l) { listenerList.add(AncestorListener.class, l); } void removeAncestorListener(AncestorListener l) { listenerList.remove(AncestorListener.class, l); } AncestorListener[] getAncestorListeners() { return listenerList.getListeners(AncestorListener.class); } /** * Notify all listeners that have registered interest for * notification on this event type. The event instance * is lazily created using the parameters passed into * the fire method. * @see EventListenerList */ protected void fireAncestorAdded(JComponent source, int id, Container ancestor, Container ancestorParent) { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for (int i = listeners.length-2; i>=0; i-=2) { if (listeners[i]==AncestorListener.class) { // Lazily create the event: AncestorEvent ancestorEvent = new AncestorEvent(source, id, ancestor, ancestorParent); ((AncestorListener)listeners[i+1]).ancestorAdded(ancestorEvent); } } } /** * Notify all listeners that have registered interest for * notification on this event type. The event instance * is lazily created using the parameters passed into * the fire method. * @see EventListenerList */ protected void fireAncestorRemoved(JComponent source, int id, Container ancestor, Container ancestorParent) { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for (int i = listeners.length-2; i>=0; i-=2) { if (listeners[i]==AncestorListener.class) { // Lazily create the event: AncestorEvent ancestorEvent = new AncestorEvent(source, id, ancestor, ancestorParent); ((AncestorListener)listeners[i+1]).ancestorRemoved(ancestorEvent); } } } /** * Notify all listeners that have registered interest for * notification on this event type. The event instance * is lazily created using the parameters passed into * the fire method. * @see EventListenerList */ protected void fireAncestorMoved(JComponent source, int id, Container ancestor, Container ancestorParent) { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for (int i = listeners.length-2; i>=0; i-=2) { if (listeners[i]==AncestorListener.class) { // Lazily create the event: AncestorEvent ancestorEvent = new AncestorEvent(source, id, ancestor, ancestorParent); ((AncestorListener)listeners[i+1]).ancestorMoved(ancestorEvent); } } } void removeAllListeners() { removeListeners(root); } void addListeners(Component ancestor, boolean addToFirst) { Component a; firstInvisibleAncestor = null; for (a = ancestor; firstInvisibleAncestor == null; a = a.getParent()) { if (addToFirst || a != ancestor) { a.addComponentListener(this); if (a instanceof JComponent) { JComponent jAncestor = (JComponent)a; jAncestor.addPropertyChangeListener(this); } } if (!a.isVisible() || a.getParent() == null || a instanceof Window) { firstInvisibleAncestor = a; } } if (firstInvisibleAncestor instanceof Window && firstInvisibleAncestor.isVisible()) { firstInvisibleAncestor = null; } } void removeListeners(Component ancestor) { Component a; for (a = ancestor; a != null; a = a.getParent()) { a.removeComponentListener(this); if (a instanceof JComponent) { JComponent jAncestor = (JComponent)a; jAncestor.removePropertyChangeListener(this); } if (a == firstInvisibleAncestor || a instanceof Window) { break; } } } public void componentResized(ComponentEvent e) {} public void componentMoved(ComponentEvent e) { Component source = e.getComponent(); fireAncestorMoved(root, AncestorEvent.ANCESTOR_MOVED, (Container)source, source.getParent()); } public void componentShown(ComponentEvent e) { Component ancestor = e.getComponent(); if (ancestor == firstInvisibleAncestor) { addListeners(ancestor, false); if (firstInvisibleAncestor == null) { fireAncestorAdded(root, AncestorEvent.ANCESTOR_ADDED, (Container)ancestor, ancestor.getParent()); } } } public void componentHidden(ComponentEvent e) { Component ancestor = e.getComponent(); boolean needsNotify = firstInvisibleAncestor == null; if ( !(ancestor instanceof Window) ) { removeListeners(ancestor.getParent()); } firstInvisibleAncestor = ancestor; if (needsNotify) { fireAncestorRemoved(root, AncestorEvent.ANCESTOR_REMOVED, (Container)ancestor, ancestor.getParent()); } } public void propertyChange(PropertyChangeEvent evt) { String s = evt.getPropertyName(); if (s!=null && (s.equals("parent") || s.equals("ancestor"))) { JComponent component = (JComponent)evt.getSource(); if (evt.getNewValue() != null) { if (component == firstInvisibleAncestor) { addListeners(component, false); if (firstInvisibleAncestor == null) { fireAncestorAdded(root, AncestorEvent.ANCESTOR_ADDED, component, component.getParent()); } } } else { boolean needsNotify = firstInvisibleAncestor == null; Container oldParent = (Container)evt.getOldValue(); removeListeners(oldParent); firstInvisibleAncestor = component; if (needsNotify) { fireAncestorRemoved(root, AncestorEvent.ANCESTOR_REMOVED, component, oldParent); } } } }}
/*
* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.swing;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.Component;
import java.awt.Container;
import java.awt.Window;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.io.Serializable;
/**
* @author Dave Moore
*/
class AncestorNotifier implements ComponentListener, PropertyChangeListener, Serializable
{
Component firstInvisibleAncestor;
EventListenerList listenerList = new EventListenerList();
JComponent root;
AncestorNotifier(JComponent root) {
this.root = root;
addListeners(root, true);
}
void addAncestorListener(AncestorListener l) {
listenerList.add(AncestorListener.class, l);
}
void removeAncestorListener(AncestorListener l) {
listenerList.remove(AncestorListener.class, l);
}
AncestorListener[] getAncestorListeners() {
return listenerList.getListeners(AncestorListener.class);
}
/**
* Notify all listeners that have registered interest for
* notification on this event type. The event instance
* is lazily created using the parameters passed into
* the fire method.
* @see EventListenerList
*/
protected void fireAncestorAdded(JComponent source, int id, Container ancestor, Container ancestorParent) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners[i]==AncestorListener.class) {
// Lazily create the event:
AncestorEvent ancestorEvent =
new AncestorEvent(source, id, ancestor, ancestorParent);
((AncestorListener)listeners[i+1]).ancestorAdded(ancestorEvent);
}
}
}
/**
* Notify all listeners that have registered interest for
* notification on this event type. The event instance
* is lazily created using the parameters passed into
* the fire method.
* @see EventListenerList
*/
protected void fireAncestorRemoved(JComponent source, int id, Container ancestor, Container ancestorParent) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners[i]==AncestorListener.class) {
// Lazily create the event:
AncestorEvent ancestorEvent =
new AncestorEvent(source, id, ancestor, ancestorParent);
((AncestorListener)listeners[i+1]).ancestorRemoved(ancestorEvent);
}
}
}
/**
* Notify all listeners that have registered interest for
* notification on this event type. The event instance
* is lazily created using the parameters passed into
* the fire method.
* @see EventListenerList
*/
protected void fireAncestorMoved(JComponent source, int id, Container ancestor, Container ancestorParent) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners[i]==AncestorListener.class) {
// Lazily create the event:
AncestorEvent ancestorEvent =
new AncestorEvent(source, id, ancestor, ancestorParent);
((AncestorListener)listeners[i+1]).ancestorMoved(ancestorEvent);
}
}
}
void removeAllListeners() {
removeListeners(root);
}
void addListeners(Component ancestor, boolean addToFirst) {
Component a;
firstInvisibleAncestor = null;
for (a = ancestor;
firstInvisibleAncestor == null;
a = a.getParent()) {
if (addToFirst || a != ancestor) {
a.addComponentListener(this);
if (a instanceof JComponent) {
JComponent jAncestor = (JComponent)a;
jAncestor.addPropertyChangeListener(this);
}
}
if (!a.isVisible() || a.getParent() == null || a instanceof Window) {
firstInvisibleAncestor = a;
}
}
if (firstInvisibleAncestor instanceof Window &&
firstInvisibleAncestor.isVisible()) {
firstInvisibleAncestor = null;
}
}
void removeListeners(Component ancestor) {
Component a;
for (a = ancestor; a != null; a = a.getParent()) {
a.removeComponentListener(this);
if (a instanceof JComponent) {
JComponent jAncestor = (JComponent)a;
jAncestor.removePropertyChangeListener(this);
}
if (a == firstInvisibleAncestor || a instanceof Window) {
break;
}
}
}
public void componentResized(ComponentEvent e) {}
public void componentMoved(ComponentEvent e) {
Component source = e.getComponent();
fireAncestorMoved(root, AncestorEvent.ANCESTOR_MOVED,
(Container)source, source.getParent());
}
public void componentShown(ComponentEvent e) {
Component ancestor = e.getComponent();
if (ancestor == firstInvisibleAncestor) {
addListeners(ancestor, false);
if (firstInvisibleAncestor == null) {
fireAncestorAdded(root, AncestorEvent.ANCESTOR_ADDED,
(Container)ancestor, ancestor.getParent());
}
}
}
public void componentHidden(ComponentEvent e) {
Component ancestor = e.getComponent();
boolean needsNotify = firstInvisibleAncestor == null;
if ( !(ancestor instanceof Window) ) {
removeListeners(ancestor.getParent());
}
firstInvisibleAncestor = ancestor;
if (needsNotify) {
fireAncestorRemoved(root, AncestorEvent.ANCESTOR_REMOVED,
(Container)ancestor, ancestor.getParent());
}
}
public void propertyChange(PropertyChangeEvent evt) {
String s = evt.getPropertyName();
if (s!=null && (s.equals("parent") || s.equals("ancestor"))) {
JComponent component = (JComponent)evt.getSource();
if (evt.getNewValue() != null) {
if (component == firstInvisibleAncestor) {
addListeners(component, false);
if (firstInvisibleAncestor == null) {
fireAncestorAdded(root, AncestorEvent.ANCESTOR_ADDED,
component, component.getParent());
}
}
} else {
boolean needsNotify = firstInvisibleAncestor == null;
Container oldParent = (Container)evt.getOldValue();
removeListeners(oldParent);
firstInvisibleAncestor = component;
if (needsNotify) {
fireAncestorRemoved(root, AncestorEvent.ANCESTOR_REMOVED,
component, oldParent);
}
}
}
}
}