| /* |
| * Copyright (c) 1996, 2006, 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 java.awt; |
| |
| import java.awt.event.*; |
| import java.lang.reflect.Array; |
| import java.util.EventListener; |
| import java.io.Serializable; |
| import java.io.ObjectOutputStream; |
| import java.io.IOException; |
| import java.util.EventListener; |
| |
| |
| /** |
| * {@code AWTEventMulticaster} implements efficient and thread-safe multi-cast |
| * event dispatching for the AWT events defined in the {@code java.awt.event} |
| * package. |
| * <p> |
| * The following example illustrates how to use this class: |
| * |
| * <pre><code> |
| * public myComponent extends Component { |
| * ActionListener actionListener = null; |
| * |
| * public synchronized void addActionListener(ActionListener l) { |
| * actionListener = AWTEventMulticaster.add(actionListener, l); |
| * } |
| * public synchronized void removeActionListener(ActionListener l) { |
| * actionListener = AWTEventMulticaster.remove(actionListener, l); |
| * } |
| * public void processEvent(AWTEvent e) { |
| * // when event occurs which causes "action" semantic |
| * ActionListener listener = actionListener; |
| * if (listener != null) { |
| * listener.actionPerformed(new ActionEvent()); |
| * } |
| * } |
| * } |
| * </code></pre> |
| * The important point to note is the first argument to the {@code |
| * add} and {@code remove} methods is the field maintaining the |
| * listeners. In addition you must assign the result of the {@code add} |
| * and {@code remove} methods to the field maintaining the listeners. |
| * <p> |
| * {@code AWTEventMulticaster} is implemented as a pair of {@code |
| * EventListeners} that are set at construction time. {@code |
| * AWTEventMulticaster} is immutable. The {@code add} and {@code |
| * remove} methods do not alter {@code AWTEventMulticaster} in |
| * anyway. If necessary, a new {@code AWTEventMulticaster} is |
| * created. In this way it is safe to add and remove listeners during |
| * the process of an event dispatching. However, event listeners |
| * added during the process of an event dispatch operation are not |
| * notified of the event currently being dispatched. |
| * <p> |
| * All of the {@code add} methods allow {@code null} arguments. If the |
| * first argument is {@code null}, the second argument is returned. If |
| * the first argument is not {@code null} and the second argument is |
| * {@code null}, the first argument is returned. If both arguments are |
| * {@code non-null}, a new {@code AWTEventMulticaster} is created using |
| * the two arguments and returned. |
| * <p> |
| * For the {@code remove} methods that take two arguments, the following is |
| * returned: |
| * <ul> |
| * <li>{@code null}, if the first argument is {@code null}, or |
| * the arguments are equal, by way of {@code ==}. |
| * <li>the first argument, if the first argument is not an instance of |
| * {@code AWTEventMulticaster}. |
| * <li>result of invoking {@code remove(EventListener)} on the |
| * first argument, supplying the second argument to the |
| * {@code remove(EventListener)} method. |
| * </ul> |
| * <p>Swing makes use of |
| * {@link javax.swing.event.EventListenerList EventListenerList} for |
| * similar logic. Refer to it for details. |
| * |
| * @see javax.swing.event.EventListenerList |
| * |
| * @author John Rose |
| * @author Amy Fowler |
| * @since 1.1 |
| */ |
| |
| public class AWTEventMulticaster implements |
| ComponentListener, ContainerListener, FocusListener, KeyListener, |
| MouseListener, MouseMotionListener, WindowListener, WindowFocusListener, |
| WindowStateListener, ActionListener, ItemListener, AdjustmentListener, |
| TextListener, InputMethodListener, HierarchyListener, |
| HierarchyBoundsListener, MouseWheelListener { |
| |
| protected final EventListener a, b; |
| |
| /** |
| * Creates an event multicaster instance which chains listener-a |
| * with listener-b. Input parameters <code>a</code> and <code>b</code> |
| * should not be <code>null</code>, though implementations may vary in |
| * choosing whether or not to throw <code>NullPointerException</code> |
| * in that case. |
| * @param a listener-a |
| * @param b listener-b |
| */ |
| protected AWTEventMulticaster(EventListener a, EventListener b) { |
| this.a = a; this.b = b; |
| } |
| |
| /** |
| * Removes a listener from this multicaster. |
| * <p> |
| * The returned multicaster contains all the listeners in this |
| * multicaster with the exception of all occurrences of {@code oldl}. |
| * If the resulting multicaster contains only one regular listener |
| * the regular listener may be returned. If the resulting multicaster |
| * is empty, then {@code null} may be returned instead. |
| * <p> |
| * No exception is thrown if {@code oldl} is {@code null}. |
| * |
| * @param oldl the listener to be removed |
| * @return resulting listener |
| */ |
| protected EventListener remove(EventListener oldl) { |
| if (oldl == a) return b; |
| if (oldl == b) return a; |
| EventListener a2 = removeInternal(a, oldl); |
| EventListener b2 = removeInternal(b, oldl); |
| if (a2 == a && b2 == b) { |
| return this; // it's not here |
| } |
| return addInternal(a2, b2); |
| } |
| |
| /** |
| * Handles the componentResized event by invoking the |
| * componentResized methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentResized(ComponentEvent e) { |
| ((ComponentListener)a).componentResized(e); |
| ((ComponentListener)b).componentResized(e); |
| } |
| |
| /** |
| * Handles the componentMoved event by invoking the |
| * componentMoved methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentMoved(ComponentEvent e) { |
| ((ComponentListener)a).componentMoved(e); |
| ((ComponentListener)b).componentMoved(e); |
| } |
| |
| /** |
| * Handles the componentShown event by invoking the |
| * componentShown methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentShown(ComponentEvent e) { |
| ((ComponentListener)a).componentShown(e); |
| ((ComponentListener)b).componentShown(e); |
| } |
| |
| /** |
| * Handles the componentHidden event by invoking the |
| * componentHidden methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentHidden(ComponentEvent e) { |
| ((ComponentListener)a).componentHidden(e); |
| ((ComponentListener)b).componentHidden(e); |
| } |
| |
| /** |
| * Handles the componentAdded container event by invoking the |
| * componentAdded methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentAdded(ContainerEvent e) { |
| ((ContainerListener)a).componentAdded(e); |
| ((ContainerListener)b).componentAdded(e); |
| } |
| |
| /** |
| * Handles the componentRemoved container event by invoking the |
| * componentRemoved methods on listener-a and listener-b. |
| * @param e the component event |
| */ |
| public void componentRemoved(ContainerEvent e) { |
| ((ContainerListener)a).componentRemoved(e); |
| ((ContainerListener)b).componentRemoved(e); |
| } |
| |
| /** |
| * Handles the focusGained event by invoking the |
| * focusGained methods on listener-a and listener-b. |
| * @param e the focus event |
| */ |
| public void focusGained(FocusEvent e) { |
| ((FocusListener)a).focusGained(e); |
| ((FocusListener)b).focusGained(e); |
| } |
| |
| /** |
| * Handles the focusLost event by invoking the |
| * focusLost methods on listener-a and listener-b. |
| * @param e the focus event |
| */ |
| public void focusLost(FocusEvent e) { |
| ((FocusListener)a).focusLost(e); |
| ((FocusListener)b).focusLost(e); |
| } |
| |
| /** |
| * Handles the keyTyped event by invoking the |
| * keyTyped methods on listener-a and listener-b. |
| * @param e the key event |
| */ |
| public void keyTyped(KeyEvent e) { |
| ((KeyListener)a).keyTyped(e); |
| ((KeyListener)b).keyTyped(e); |
| } |
| |
| /** |
| * Handles the keyPressed event by invoking the |
| * keyPressed methods on listener-a and listener-b. |
| * @param e the key event |
| */ |
| public void keyPressed(KeyEvent e) { |
| ((KeyListener)a).keyPressed(e); |
| ((KeyListener)b).keyPressed(e); |
| } |
| |
| /** |
| * Handles the keyReleased event by invoking the |
| * keyReleased methods on listener-a and listener-b. |
| * @param e the key event |
| */ |
| public void keyReleased(KeyEvent e) { |
| ((KeyListener)a).keyReleased(e); |
| ((KeyListener)b).keyReleased(e); |
| } |
| |
| /** |
| * Handles the mouseClicked event by invoking the |
| * mouseClicked methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseClicked(MouseEvent e) { |
| ((MouseListener)a).mouseClicked(e); |
| ((MouseListener)b).mouseClicked(e); |
| } |
| |
| /** |
| * Handles the mousePressed event by invoking the |
| * mousePressed methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mousePressed(MouseEvent e) { |
| ((MouseListener)a).mousePressed(e); |
| ((MouseListener)b).mousePressed(e); |
| } |
| |
| /** |
| * Handles the mouseReleased event by invoking the |
| * mouseReleased methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseReleased(MouseEvent e) { |
| ((MouseListener)a).mouseReleased(e); |
| ((MouseListener)b).mouseReleased(e); |
| } |
| |
| /** |
| * Handles the mouseEntered event by invoking the |
| * mouseEntered methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseEntered(MouseEvent e) { |
| ((MouseListener)a).mouseEntered(e); |
| ((MouseListener)b).mouseEntered(e); |
| } |
| |
| /** |
| * Handles the mouseExited event by invoking the |
| * mouseExited methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseExited(MouseEvent e) { |
| ((MouseListener)a).mouseExited(e); |
| ((MouseListener)b).mouseExited(e); |
| } |
| |
| /** |
| * Handles the mouseDragged event by invoking the |
| * mouseDragged methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseDragged(MouseEvent e) { |
| ((MouseMotionListener)a).mouseDragged(e); |
| ((MouseMotionListener)b).mouseDragged(e); |
| } |
| |
| /** |
| * Handles the mouseMoved event by invoking the |
| * mouseMoved methods on listener-a and listener-b. |
| * @param e the mouse event |
| */ |
| public void mouseMoved(MouseEvent e) { |
| ((MouseMotionListener)a).mouseMoved(e); |
| ((MouseMotionListener)b).mouseMoved(e); |
| } |
| |
| /** |
| * Handles the windowOpened event by invoking the |
| * windowOpened methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowOpened(WindowEvent e) { |
| ((WindowListener)a).windowOpened(e); |
| ((WindowListener)b).windowOpened(e); |
| } |
| |
| /** |
| * Handles the windowClosing event by invoking the |
| * windowClosing methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowClosing(WindowEvent e) { |
| ((WindowListener)a).windowClosing(e); |
| ((WindowListener)b).windowClosing(e); |
| } |
| |
| /** |
| * Handles the windowClosed event by invoking the |
| * windowClosed methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowClosed(WindowEvent e) { |
| ((WindowListener)a).windowClosed(e); |
| ((WindowListener)b).windowClosed(e); |
| } |
| |
| /** |
| * Handles the windowIconified event by invoking the |
| * windowIconified methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowIconified(WindowEvent e) { |
| ((WindowListener)a).windowIconified(e); |
| ((WindowListener)b).windowIconified(e); |
| } |
| |
| /** |
| * Handles the windowDeiconfied event by invoking the |
| * windowDeiconified methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowDeiconified(WindowEvent e) { |
| ((WindowListener)a).windowDeiconified(e); |
| ((WindowListener)b).windowDeiconified(e); |
| } |
| |
| /** |
| * Handles the windowActivated event by invoking the |
| * windowActivated methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowActivated(WindowEvent e) { |
| ((WindowListener)a).windowActivated(e); |
| ((WindowListener)b).windowActivated(e); |
| } |
| |
| /** |
| * Handles the windowDeactivated event by invoking the |
| * windowDeactivated methods on listener-a and listener-b. |
| * @param e the window event |
| */ |
| public void windowDeactivated(WindowEvent e) { |
| ((WindowListener)a).windowDeactivated(e); |
| ((WindowListener)b).windowDeactivated(e); |
| } |
| |
| /** |
| * Handles the windowStateChanged event by invoking the |
| * windowStateChanged methods on listener-a and listener-b. |
| * @param e the window event |
| * @since 1.4 |
| */ |
| public void windowStateChanged(WindowEvent e) { |
| ((WindowStateListener)a).windowStateChanged(e); |
| ((WindowStateListener)b).windowStateChanged(e); |
| } |
| |
| |
| /** |
| * Handles the windowGainedFocus event by invoking the windowGainedFocus |
| * methods on listener-a and listener-b. |
| * @param e the window event |
| * @since 1.4 |
| */ |
| public void windowGainedFocus(WindowEvent e) { |
| ((WindowFocusListener)a).windowGainedFocus(e); |
| ((WindowFocusListener)b).windowGainedFocus(e); |
| } |
| |
| /** |
| * Handles the windowLostFocus event by invoking the windowLostFocus |
| * methods on listener-a and listener-b. |
| * @param e the window event |
| * @since 1.4 |
| */ |
| public void windowLostFocus(WindowEvent e) { |
| ((WindowFocusListener)a).windowLostFocus(e); |
| ((WindowFocusListener)b).windowLostFocus(e); |
| } |
| |
| /** |
| * Handles the actionPerformed event by invoking the |
| * actionPerformed methods on listener-a and listener-b. |
| * @param e the action event |
| */ |
| public void actionPerformed(ActionEvent e) { |
| ((ActionListener)a).actionPerformed(e); |
| ((ActionListener)b).actionPerformed(e); |
| } |
| |
| /** |
| * Handles the itemStateChanged event by invoking the |
| * itemStateChanged methods on listener-a and listener-b. |
| * @param e the item event |
| */ |
| public void itemStateChanged(ItemEvent e) { |
| ((ItemListener)a).itemStateChanged(e); |
| ((ItemListener)b).itemStateChanged(e); |
| } |
| |
| /** |
| * Handles the adjustmentValueChanged event by invoking the |
| * adjustmentValueChanged methods on listener-a and listener-b. |
| * @param e the adjustment event |
| */ |
| public void adjustmentValueChanged(AdjustmentEvent e) { |
| ((AdjustmentListener)a).adjustmentValueChanged(e); |
| ((AdjustmentListener)b).adjustmentValueChanged(e); |
| } |
| public void textValueChanged(TextEvent e) { |
| ((TextListener)a).textValueChanged(e); |
| ((TextListener)b).textValueChanged(e); |
| } |
| |
| /** |
| * Handles the inputMethodTextChanged event by invoking the |
| * inputMethodTextChanged methods on listener-a and listener-b. |
| * @param e the item event |
| */ |
| public void inputMethodTextChanged(InputMethodEvent e) { |
| ((InputMethodListener)a).inputMethodTextChanged(e); |
| ((InputMethodListener)b).inputMethodTextChanged(e); |
| } |
| |
| /** |
| * Handles the caretPositionChanged event by invoking the |
| * caretPositionChanged methods on listener-a and listener-b. |
| * @param e the item event |
| */ |
| public void caretPositionChanged(InputMethodEvent e) { |
| ((InputMethodListener)a).caretPositionChanged(e); |
| ((InputMethodListener)b).caretPositionChanged(e); |
| } |
| |
| /** |
| * Handles the hierarchyChanged event by invoking the |
| * hierarchyChanged methods on listener-a and listener-b. |
| * @param e the item event |
| * @since 1.3 |
| */ |
| public void hierarchyChanged(HierarchyEvent e) { |
| ((HierarchyListener)a).hierarchyChanged(e); |
| ((HierarchyListener)b).hierarchyChanged(e); |
| } |
| |
| /** |
| * Handles the ancestorMoved event by invoking the |
| * ancestorMoved methods on listener-a and listener-b. |
| * @param e the item event |
| * @since 1.3 |
| */ |
| public void ancestorMoved(HierarchyEvent e) { |
| ((HierarchyBoundsListener)a).ancestorMoved(e); |
| ((HierarchyBoundsListener)b).ancestorMoved(e); |
| } |
| |
| /** |
| * Handles the ancestorResized event by invoking the |
| * ancestorResized methods on listener-a and listener-b. |
| * @param e the item event |
| * @since 1.3 |
| */ |
| public void ancestorResized(HierarchyEvent e) { |
| ((HierarchyBoundsListener)a).ancestorResized(e); |
| ((HierarchyBoundsListener)b).ancestorResized(e); |
| } |
| |
| /** |
| * Handles the mouseWheelMoved event by invoking the |
| * mouseWheelMoved methods on listener-a and listener-b. |
| * @param e the mouse event |
| * @since 1.4 |
| */ |
| public void mouseWheelMoved(MouseWheelEvent e) { |
| ((MouseWheelListener)a).mouseWheelMoved(e); |
| ((MouseWheelListener)b).mouseWheelMoved(e); |
| } |
| |
| /** |
| * Adds component-listener-a with component-listener-b and |
| * returns the resulting multicast listener. |
| * @param a component-listener-a |
| * @param b component-listener-b |
| */ |
| public static ComponentListener add(ComponentListener a, ComponentListener b) { |
| return (ComponentListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds container-listener-a with container-listener-b and |
| * returns the resulting multicast listener. |
| * @param a container-listener-a |
| * @param b container-listener-b |
| */ |
| public static ContainerListener add(ContainerListener a, ContainerListener b) { |
| return (ContainerListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds focus-listener-a with focus-listener-b and |
| * returns the resulting multicast listener. |
| * @param a focus-listener-a |
| * @param b focus-listener-b |
| */ |
| public static FocusListener add(FocusListener a, FocusListener b) { |
| return (FocusListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds key-listener-a with key-listener-b and |
| * returns the resulting multicast listener. |
| * @param a key-listener-a |
| * @param b key-listener-b |
| */ |
| public static KeyListener add(KeyListener a, KeyListener b) { |
| return (KeyListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds mouse-listener-a with mouse-listener-b and |
| * returns the resulting multicast listener. |
| * @param a mouse-listener-a |
| * @param b mouse-listener-b |
| */ |
| public static MouseListener add(MouseListener a, MouseListener b) { |
| return (MouseListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds mouse-motion-listener-a with mouse-motion-listener-b and |
| * returns the resulting multicast listener. |
| * @param a mouse-motion-listener-a |
| * @param b mouse-motion-listener-b |
| */ |
| public static MouseMotionListener add(MouseMotionListener a, MouseMotionListener b) { |
| return (MouseMotionListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds window-listener-a with window-listener-b and |
| * returns the resulting multicast listener. |
| * @param a window-listener-a |
| * @param b window-listener-b |
| */ |
| public static WindowListener add(WindowListener a, WindowListener b) { |
| return (WindowListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds window-state-listener-a with window-state-listener-b |
| * and returns the resulting multicast listener. |
| * @param a window-state-listener-a |
| * @param b window-state-listener-b |
| * @since 1.4 |
| */ |
| public static WindowStateListener add(WindowStateListener a, |
| WindowStateListener b) { |
| return (WindowStateListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds window-focus-listener-a with window-focus-listener-b |
| * and returns the resulting multicast listener. |
| * @param a window-focus-listener-a |
| * @param b window-focus-listener-b |
| * @since 1.4 |
| */ |
| public static WindowFocusListener add(WindowFocusListener a, |
| WindowFocusListener b) { |
| return (WindowFocusListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds action-listener-a with action-listener-b and |
| * returns the resulting multicast listener. |
| * @param a action-listener-a |
| * @param b action-listener-b |
| */ |
| public static ActionListener add(ActionListener a, ActionListener b) { |
| return (ActionListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds item-listener-a with item-listener-b and |
| * returns the resulting multicast listener. |
| * @param a item-listener-a |
| * @param b item-listener-b |
| */ |
| public static ItemListener add(ItemListener a, ItemListener b) { |
| return (ItemListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds adjustment-listener-a with adjustment-listener-b and |
| * returns the resulting multicast listener. |
| * @param a adjustment-listener-a |
| * @param b adjustment-listener-b |
| */ |
| public static AdjustmentListener add(AdjustmentListener a, AdjustmentListener b) { |
| return (AdjustmentListener)addInternal(a, b); |
| } |
| public static TextListener add(TextListener a, TextListener b) { |
| return (TextListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds input-method-listener-a with input-method-listener-b and |
| * returns the resulting multicast listener. |
| * @param a input-method-listener-a |
| * @param b input-method-listener-b |
| */ |
| public static InputMethodListener add(InputMethodListener a, InputMethodListener b) { |
| return (InputMethodListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds hierarchy-listener-a with hierarchy-listener-b and |
| * returns the resulting multicast listener. |
| * @param a hierarchy-listener-a |
| * @param b hierarchy-listener-b |
| * @since 1.3 |
| */ |
| public static HierarchyListener add(HierarchyListener a, HierarchyListener b) { |
| return (HierarchyListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds hierarchy-bounds-listener-a with hierarchy-bounds-listener-b and |
| * returns the resulting multicast listener. |
| * @param a hierarchy-bounds-listener-a |
| * @param b hierarchy-bounds-listener-b |
| * @since 1.3 |
| */ |
| public static HierarchyBoundsListener add(HierarchyBoundsListener a, HierarchyBoundsListener b) { |
| return (HierarchyBoundsListener)addInternal(a, b); |
| } |
| |
| /** |
| * Adds mouse-wheel-listener-a with mouse-wheel-listener-b and |
| * returns the resulting multicast listener. |
| * @param a mouse-wheel-listener-a |
| * @param b mouse-wheel-listener-b |
| * @since 1.4 |
| */ |
| public static MouseWheelListener add(MouseWheelListener a, |
| MouseWheelListener b) { |
| return (MouseWheelListener)addInternal(a, b); |
| } |
| |
| /** |
| * Removes the old component-listener from component-listener-l and |
| * returns the resulting multicast listener. |
| * @param l component-listener-l |
| * @param oldl the component-listener being removed |
| */ |
| public static ComponentListener remove(ComponentListener l, ComponentListener oldl) { |
| return (ComponentListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old container-listener from container-listener-l and |
| * returns the resulting multicast listener. |
| * @param l container-listener-l |
| * @param oldl the container-listener being removed |
| */ |
| public static ContainerListener remove(ContainerListener l, ContainerListener oldl) { |
| return (ContainerListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old focus-listener from focus-listener-l and |
| * returns the resulting multicast listener. |
| * @param l focus-listener-l |
| * @param oldl the focus-listener being removed |
| */ |
| public static FocusListener remove(FocusListener l, FocusListener oldl) { |
| return (FocusListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old key-listener from key-listener-l and |
| * returns the resulting multicast listener. |
| * @param l key-listener-l |
| * @param oldl the key-listener being removed |
| */ |
| public static KeyListener remove(KeyListener l, KeyListener oldl) { |
| return (KeyListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old mouse-listener from mouse-listener-l and |
| * returns the resulting multicast listener. |
| * @param l mouse-listener-l |
| * @param oldl the mouse-listener being removed |
| */ |
| public static MouseListener remove(MouseListener l, MouseListener oldl) { |
| return (MouseListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old mouse-motion-listener from mouse-motion-listener-l |
| * and returns the resulting multicast listener. |
| * @param l mouse-motion-listener-l |
| * @param oldl the mouse-motion-listener being removed |
| */ |
| public static MouseMotionListener remove(MouseMotionListener l, MouseMotionListener oldl) { |
| return (MouseMotionListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old window-listener from window-listener-l and |
| * returns the resulting multicast listener. |
| * @param l window-listener-l |
| * @param oldl the window-listener being removed |
| */ |
| public static WindowListener remove(WindowListener l, WindowListener oldl) { |
| return (WindowListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old window-state-listener from window-state-listener-l |
| * and returns the resulting multicast listener. |
| * @param l window-state-listener-l |
| * @param oldl the window-state-listener being removed |
| * @since 1.4 |
| */ |
| public static WindowStateListener remove(WindowStateListener l, |
| WindowStateListener oldl) { |
| return (WindowStateListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old window-focus-listener from window-focus-listener-l |
| * and returns the resulting multicast listener. |
| * @param l window-focus-listener-l |
| * @param oldl the window-focus-listener being removed |
| * @since 1.4 |
| */ |
| public static WindowFocusListener remove(WindowFocusListener l, |
| WindowFocusListener oldl) { |
| return (WindowFocusListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old action-listener from action-listener-l and |
| * returns the resulting multicast listener. |
| * @param l action-listener-l |
| * @param oldl the action-listener being removed |
| */ |
| public static ActionListener remove(ActionListener l, ActionListener oldl) { |
| return (ActionListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old item-listener from item-listener-l and |
| * returns the resulting multicast listener. |
| * @param l item-listener-l |
| * @param oldl the item-listener being removed |
| */ |
| public static ItemListener remove(ItemListener l, ItemListener oldl) { |
| return (ItemListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old adjustment-listener from adjustment-listener-l and |
| * returns the resulting multicast listener. |
| * @param l adjustment-listener-l |
| * @param oldl the adjustment-listener being removed |
| */ |
| public static AdjustmentListener remove(AdjustmentListener l, AdjustmentListener oldl) { |
| return (AdjustmentListener) removeInternal(l, oldl); |
| } |
| public static TextListener remove(TextListener l, TextListener oldl) { |
| return (TextListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old input-method-listener from input-method-listener-l and |
| * returns the resulting multicast listener. |
| * @param l input-method-listener-l |
| * @param oldl the input-method-listener being removed |
| */ |
| public static InputMethodListener remove(InputMethodListener l, InputMethodListener oldl) { |
| return (InputMethodListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old hierarchy-listener from hierarchy-listener-l and |
| * returns the resulting multicast listener. |
| * @param l hierarchy-listener-l |
| * @param oldl the hierarchy-listener being removed |
| * @since 1.3 |
| */ |
| public static HierarchyListener remove(HierarchyListener l, HierarchyListener oldl) { |
| return (HierarchyListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old hierarchy-bounds-listener from |
| * hierarchy-bounds-listener-l and returns the resulting multicast |
| * listener. |
| * @param l hierarchy-bounds-listener-l |
| * @param oldl the hierarchy-bounds-listener being removed |
| * @since 1.3 |
| */ |
| public static HierarchyBoundsListener remove(HierarchyBoundsListener l, HierarchyBoundsListener oldl) { |
| return (HierarchyBoundsListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Removes the old mouse-wheel-listener from mouse-wheel-listener-l |
| * and returns the resulting multicast listener. |
| * @param l mouse-wheel-listener-l |
| * @param oldl the mouse-wheel-listener being removed |
| * @since 1.4 |
| */ |
| public static MouseWheelListener remove(MouseWheelListener l, |
| MouseWheelListener oldl) { |
| return (MouseWheelListener) removeInternal(l, oldl); |
| } |
| |
| /** |
| * Returns the resulting multicast listener from adding listener-a |
| * and listener-b together. |
| * If listener-a is null, it returns listener-b; |
| * If listener-b is null, it returns listener-a |
| * If neither are null, then it creates and returns |
| * a new AWTEventMulticaster instance which chains a with b. |
| * @param a event listener-a |
| * @param b event listener-b |
| */ |
| protected static EventListener addInternal(EventListener a, EventListener b) { |
| if (a == null) return b; |
| if (b == null) return a; |
| return new AWTEventMulticaster(a, b); |
| } |
| |
| /** |
| * Returns the resulting multicast listener after removing the |
| * old listener from listener-l. |
| * If listener-l equals the old listener OR listener-l is null, |
| * returns null. |
| * Else if listener-l is an instance of AWTEventMulticaster, |
| * then it removes the old listener from it. |
| * Else, returns listener l. |
| * @param l the listener being removed from |
| * @param oldl the listener being removed |
| */ |
| protected static EventListener removeInternal(EventListener l, EventListener oldl) { |
| if (l == oldl || l == null) { |
| return null; |
| } else if (l instanceof AWTEventMulticaster) { |
| return ((AWTEventMulticaster)l).remove(oldl); |
| } else { |
| return l; // it's not here |
| } |
| } |
| |
| |
| /* Serialization support. |
| */ |
| |
| protected void saveInternal(ObjectOutputStream s, String k) throws IOException { |
| if (a instanceof AWTEventMulticaster) { |
| ((AWTEventMulticaster)a).saveInternal(s, k); |
| } |
| else if (a instanceof Serializable) { |
| s.writeObject(k); |
| s.writeObject(a); |
| } |
| |
| if (b instanceof AWTEventMulticaster) { |
| ((AWTEventMulticaster)b).saveInternal(s, k); |
| } |
| else if (b instanceof Serializable) { |
| s.writeObject(k); |
| s.writeObject(b); |
| } |
| } |
| |
| protected static void save(ObjectOutputStream s, String k, EventListener l) throws IOException { |
| if (l == null) { |
| return; |
| } |
| else if (l instanceof AWTEventMulticaster) { |
| ((AWTEventMulticaster)l).saveInternal(s, k); |
| } |
| else if (l instanceof Serializable) { |
| s.writeObject(k); |
| s.writeObject(l); |
| } |
| } |
| |
| /* |
| * Recursive method which returns a count of the number of listeners in |
| * EventListener, handling the (common) case of l actually being an |
| * AWTEventMulticaster. Additionally, only listeners of type listenerType |
| * are counted. Method modified to fix bug 4513402. -bchristi |
| */ |
| private static int getListenerCount(EventListener l, Class listenerType) { |
| if (l instanceof AWTEventMulticaster) { |
| AWTEventMulticaster mc = (AWTEventMulticaster)l; |
| return getListenerCount(mc.a, listenerType) + |
| getListenerCount(mc.b, listenerType); |
| } |
| else { |
| // Only count listeners of correct type |
| return listenerType.isInstance(l) ? 1 : 0; |
| } |
| } |
| |
| /* |
| * Recusive method which populates EventListener array a with EventListeners |
| * from l. l is usually an AWTEventMulticaster. Bug 4513402 revealed that |
| * if l differed in type from the element type of a, an ArrayStoreException |
| * would occur. Now l is only inserted into a if it's of the appropriate |
| * type. -bchristi |
| */ |
| private static int populateListenerArray(EventListener[] a, EventListener l, int index) { |
| if (l instanceof AWTEventMulticaster) { |
| AWTEventMulticaster mc = (AWTEventMulticaster)l; |
| int lhs = populateListenerArray(a, mc.a, index); |
| return populateListenerArray(a, mc.b, lhs); |
| } |
| else if (a.getClass().getComponentType().isInstance(l)) { |
| a[index] = l; |
| return index + 1; |
| } |
| // Skip nulls, instances of wrong class |
| else { |
| return index; |
| } |
| } |
| |
| /** |
| * Returns an array of all the objects chained as |
| * <code><em>Foo</em>Listener</code>s by the specified |
| * <code>java.util.EventListener</code>. |
| * <code><em>Foo</em>Listener</code>s are chained by the |
| * <code>AWTEventMulticaster</code> using the |
| * <code>add<em>Foo</em>Listener</code> method. |
| * If a <code>null</code> listener is specified, this method returns an |
| * empty array. If the specified listener is not an instance of |
| * <code>AWTEventMulticaster</code>, this method returns an array which |
| * contains only the specified listener. If no such listeners are chanined, |
| * this method returns an empty array. |
| * |
| * @param l the specified <code>java.util.EventListener</code> |
| * @param listenerType the type of listeners requested; this parameter |
| * should specify an interface that descends from |
| * <code>java.util.EventListener</code> |
| * @return an array of all objects chained as |
| * <code><em>Foo</em>Listener</code>s by the specified multicast |
| * listener, or an empty array if no such listeners have been |
| * chained by the specified multicast listener |
| * @exception NullPointerException if the specified |
| * {@code listenertype} parameter is {@code null} |
| * @exception ClassCastException if <code>listenerType</code> |
| * doesn't specify a class or interface that implements |
| * <code>java.util.EventListener</code> |
| * |
| * @since 1.4 |
| */ |
| public static <T extends EventListener> T[] |
| getListeners(EventListener l, Class<T> listenerType) |
| { |
| if (listenerType == null) { |
| throw new NullPointerException ("Listener type should not be null"); |
| } |
| |
| int n = getListenerCount(l, listenerType); |
| T[] result = (T[])Array.newInstance(listenerType, n); |
| populateListenerArray(result, l, 0); |
| return result; |
| } |
| } |
