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Java example source code file (BasicPopupMenuUI.java)
This example Java source code file (BasicPopupMenuUI.java) is included in the alvinalexander.com
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Warehouse" project. The intent of this project is to help you "Learn
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Learn more about this Java project at its project page.
The BasicPopupMenuUI.java Java example source code
/*
* Copyright (c) 1997, 2013, 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.plaf.basic;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.border.*;
import java.applet.Applet;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.Window;
import java.awt.event.*;
import java.awt.AWTEvent;
import java.awt.Toolkit;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.util.*;
import sun.swing.DefaultLookup;
import sun.swing.UIAction;
import sun.awt.AppContext;
/**
* A Windows L&F implementation of PopupMenuUI. This implementation
* is a "combined" view/controller.
*
* @author Georges Saab
* @author David Karlton
* @author Arnaud Weber
*/
public class BasicPopupMenuUI extends PopupMenuUI {
static final StringBuilder MOUSE_GRABBER_KEY = new StringBuilder(
"javax.swing.plaf.basic.BasicPopupMenuUI.MouseGrabber");
static final StringBuilder MENU_KEYBOARD_HELPER_KEY = new StringBuilder(
"javax.swing.plaf.basic.BasicPopupMenuUI.MenuKeyboardHelper");
protected JPopupMenu popupMenu = null;
private transient PopupMenuListener popupMenuListener = null;
private MenuKeyListener menuKeyListener = null;
private static boolean checkedUnpostPopup;
private static boolean unpostPopup;
public static ComponentUI createUI(JComponent x) {
return new BasicPopupMenuUI();
}
public BasicPopupMenuUI() {
BasicLookAndFeel.needsEventHelper = true;
LookAndFeel laf = UIManager.getLookAndFeel();
if (laf instanceof BasicLookAndFeel) {
((BasicLookAndFeel)laf).installAWTEventListener();
}
}
public void installUI(JComponent c) {
popupMenu = (JPopupMenu) c;
installDefaults();
installListeners();
installKeyboardActions();
}
public void installDefaults() {
if (popupMenu.getLayout() == null ||
popupMenu.getLayout() instanceof UIResource)
popupMenu.setLayout(new DefaultMenuLayout(popupMenu, BoxLayout.Y_AXIS));
LookAndFeel.installProperty(popupMenu, "opaque", Boolean.TRUE);
LookAndFeel.installBorder(popupMenu, "PopupMenu.border");
LookAndFeel.installColorsAndFont(popupMenu,
"PopupMenu.background",
"PopupMenu.foreground",
"PopupMenu.font");
}
protected void installListeners() {
if (popupMenuListener == null) {
popupMenuListener = new BasicPopupMenuListener();
}
popupMenu.addPopupMenuListener(popupMenuListener);
if (menuKeyListener == null) {
menuKeyListener = new BasicMenuKeyListener();
}
popupMenu.addMenuKeyListener(menuKeyListener);
AppContext context = AppContext.getAppContext();
synchronized (MOUSE_GRABBER_KEY) {
MouseGrabber mouseGrabber = (MouseGrabber)context.get(
MOUSE_GRABBER_KEY);
if (mouseGrabber == null) {
mouseGrabber = new MouseGrabber();
context.put(MOUSE_GRABBER_KEY, mouseGrabber);
}
}
synchronized (MENU_KEYBOARD_HELPER_KEY) {
MenuKeyboardHelper helper =
(MenuKeyboardHelper)context.get(MENU_KEYBOARD_HELPER_KEY);
if (helper == null) {
helper = new MenuKeyboardHelper();
context.put(MENU_KEYBOARD_HELPER_KEY, helper);
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
msm.addChangeListener(helper);
}
}
}
protected void installKeyboardActions() {
}
static InputMap getInputMap(JPopupMenu popup, JComponent c) {
InputMap windowInputMap = null;
Object[] bindings = (Object[])UIManager.get("PopupMenu.selectedWindowInputMapBindings");
if (bindings != null) {
windowInputMap = LookAndFeel.makeComponentInputMap(c, bindings);
if (!popup.getComponentOrientation().isLeftToRight()) {
Object[] km = (Object[])UIManager.get("PopupMenu.selectedWindowInputMapBindings.RightToLeft");
if (km != null) {
InputMap rightToLeftInputMap = LookAndFeel.makeComponentInputMap(c, km);
rightToLeftInputMap.setParent(windowInputMap);
windowInputMap = rightToLeftInputMap;
}
}
}
return windowInputMap;
}
static ActionMap getActionMap() {
return LazyActionMap.getActionMap(BasicPopupMenuUI.class,
"PopupMenu.actionMap");
}
static void loadActionMap(LazyActionMap map) {
map.put(new Actions(Actions.CANCEL));
map.put(new Actions(Actions.SELECT_NEXT));
map.put(new Actions(Actions.SELECT_PREVIOUS));
map.put(new Actions(Actions.SELECT_PARENT));
map.put(new Actions(Actions.SELECT_CHILD));
map.put(new Actions(Actions.RETURN));
BasicLookAndFeel.installAudioActionMap(map);
}
public void uninstallUI(JComponent c) {
uninstallDefaults();
uninstallListeners();
uninstallKeyboardActions();
popupMenu = null;
}
protected void uninstallDefaults() {
LookAndFeel.uninstallBorder(popupMenu);
}
protected void uninstallListeners() {
if (popupMenuListener != null) {
popupMenu.removePopupMenuListener(popupMenuListener);
}
if (menuKeyListener != null) {
popupMenu.removeMenuKeyListener(menuKeyListener);
}
}
protected void uninstallKeyboardActions() {
SwingUtilities.replaceUIActionMap(popupMenu, null);
SwingUtilities.replaceUIInputMap(popupMenu,
JComponent.WHEN_IN_FOCUSED_WINDOW, null);
}
static MenuElement getFirstPopup() {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement[] p = msm.getSelectedPath();
MenuElement me = null;
for(int i = 0 ; me == null && i < p.length ; i++) {
if (p[i] instanceof JPopupMenu)
me = p[i];
}
return me;
}
static JPopupMenu getLastPopup() {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement[] p = msm.getSelectedPath();
JPopupMenu popup = null;
for(int i = p.length - 1; popup == null && i >= 0; i--) {
if (p[i] instanceof JPopupMenu)
popup = (JPopupMenu)p[i];
}
return popup;
}
static List<JPopupMenu> getPopups() {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement[] p = msm.getSelectedPath();
List<JPopupMenu> list = new ArrayList(p.length);
for (MenuElement element : p) {
if (element instanceof JPopupMenu) {
list.add((JPopupMenu) element);
}
}
return list;
}
public boolean isPopupTrigger(MouseEvent e) {
return ((e.getID()==MouseEvent.MOUSE_RELEASED)
&& ((e.getModifiers() & MouseEvent.BUTTON3_MASK)!=0));
}
private static boolean checkInvokerEqual(MenuElement present, MenuElement last) {
Component invokerPresent = present.getComponent();
Component invokerLast = last.getComponent();
if (invokerPresent instanceof JPopupMenu) {
invokerPresent = ((JPopupMenu)invokerPresent).getInvoker();
}
if (invokerLast instanceof JPopupMenu) {
invokerLast = ((JPopupMenu)invokerLast).getInvoker();
}
return (invokerPresent == invokerLast);
}
/**
* This Listener fires the Action that provides the correct auditory
* feedback.
*
* @since 1.4
*/
private class BasicPopupMenuListener implements PopupMenuListener {
public void popupMenuCanceled(PopupMenuEvent e) {
}
public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
}
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
BasicLookAndFeel.playSound((JPopupMenu)e.getSource(),
"PopupMenu.popupSound");
}
}
/**
* Handles mnemonic for children JMenuItems.
* @since 1.5
*/
private class BasicMenuKeyListener implements MenuKeyListener {
MenuElement menuToOpen = null;
public void menuKeyTyped(MenuKeyEvent e) {
if (menuToOpen != null) {
// we have a submenu to open
JPopupMenu subpopup = ((JMenu)menuToOpen).getPopupMenu();
MenuElement subitem = findEnabledChild(
subpopup.getSubElements(), -1, true);
ArrayList<MenuElement> lst = new ArrayList(Arrays.asList(e.getPath()));
lst.add(menuToOpen);
lst.add(subpopup);
if (subitem != null) {
lst.add(subitem);
}
MenuElement newPath[] = new MenuElement[0];
newPath = lst.toArray(newPath);
MenuSelectionManager.defaultManager().setSelectedPath(newPath);
e.consume();
}
menuToOpen = null;
}
public void menuKeyPressed(MenuKeyEvent e) {
char keyChar = e.getKeyChar();
// Handle the case for Escape or Enter...
if (!Character.isLetterOrDigit(keyChar)) {
return;
}
MenuSelectionManager manager = e.getMenuSelectionManager();
MenuElement path[] = e.getPath();
MenuElement items[] = popupMenu.getSubElements();
int currentIndex = -1;
int matches = 0;
int firstMatch = -1;
int indexes[] = null;
for (int j = 0; j < items.length; j++) {
if (! (items[j] instanceof JMenuItem)) {
continue;
}
JMenuItem item = (JMenuItem)items[j];
int mnemonic = item.getMnemonic();
if (item.isEnabled() &&
item.isVisible() && lower(keyChar) == lower(mnemonic)) {
if (matches == 0) {
firstMatch = j;
matches++;
} else {
if (indexes == null) {
indexes = new int[items.length];
indexes[0] = firstMatch;
}
indexes[matches++] = j;
}
}
if (item.isArmed() || item.isSelected()) {
currentIndex = matches - 1;
}
}
if (matches == 0) {
// no op
} else if (matches == 1) {
// Invoke the menu action
JMenuItem item = (JMenuItem)items[firstMatch];
if (item instanceof JMenu) {
// submenus are handled in menuKeyTyped
menuToOpen = item;
} else if (item.isEnabled()) {
// we have a menu item
manager.clearSelectedPath();
item.doClick();
}
e.consume();
} else {
// Select the menu item with the matching mnemonic. If
// the same mnemonic has been invoked then select the next
// menu item in the cycle.
MenuElement newItem;
newItem = items[indexes[(currentIndex + 1) % matches]];
MenuElement newPath[] = new MenuElement[path.length+1];
System.arraycopy(path, 0, newPath, 0, path.length);
newPath[path.length] = newItem;
manager.setSelectedPath(newPath);
e.consume();
}
}
public void menuKeyReleased(MenuKeyEvent e) {
}
private char lower(char keyChar) {
return Character.toLowerCase(keyChar);
}
private char lower(int mnemonic) {
return Character.toLowerCase((char) mnemonic);
}
}
private static class Actions extends UIAction {
// Types of actions
private static final String CANCEL = "cancel";
private static final String SELECT_NEXT = "selectNext";
private static final String SELECT_PREVIOUS = "selectPrevious";
private static final String SELECT_PARENT = "selectParent";
private static final String SELECT_CHILD = "selectChild";
private static final String RETURN = "return";
// Used for next/previous actions
private static final boolean FORWARD = true;
private static final boolean BACKWARD = false;
// Used for parent/child actions
private static final boolean PARENT = false;
private static final boolean CHILD = true;
Actions(String key) {
super(key);
}
public void actionPerformed(ActionEvent e) {
String key = getName();
if (key == CANCEL) {
cancel();
}
else if (key == SELECT_NEXT) {
selectItem(FORWARD);
}
else if (key == SELECT_PREVIOUS) {
selectItem(BACKWARD);
}
else if (key == SELECT_PARENT) {
selectParentChild(PARENT);
}
else if (key == SELECT_CHILD) {
selectParentChild(CHILD);
}
else if (key == RETURN) {
doReturn();
}
}
private void doReturn() {
KeyboardFocusManager fmgr =
KeyboardFocusManager.getCurrentKeyboardFocusManager();
Component focusOwner = fmgr.getFocusOwner();
if(focusOwner != null && !(focusOwner instanceof JRootPane)) {
return;
}
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement path[] = msm.getSelectedPath();
MenuElement lastElement;
if(path.length > 0) {
lastElement = path[path.length-1];
if(lastElement instanceof JMenu) {
MenuElement newPath[] = new MenuElement[path.length+1];
System.arraycopy(path,0,newPath,0,path.length);
newPath[path.length] = ((JMenu)lastElement).getPopupMenu();
msm.setSelectedPath(newPath);
} else if(lastElement instanceof JMenuItem) {
JMenuItem mi = (JMenuItem)lastElement;
if (mi.getUI() instanceof BasicMenuItemUI) {
((BasicMenuItemUI)mi.getUI()).doClick(msm);
}
else {
msm.clearSelectedPath();
mi.doClick(0);
}
}
}
}
private void selectParentChild(boolean direction) {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement path[] = msm.getSelectedPath();
int len = path.length;
if (direction == PARENT) {
// selecting parent
int popupIndex = len-1;
if (len > 2 &&
// check if we have an open submenu. A submenu item may or
// may not be selected, so submenu popup can be either the
// last or next to the last item.
(path[popupIndex] instanceof JPopupMenu ||
path[--popupIndex] instanceof JPopupMenu) &&
!((JMenu)path[popupIndex-1]).isTopLevelMenu()) {
// we have a submenu, just close it
MenuElement newPath[] = new MenuElement[popupIndex];
System.arraycopy(path, 0, newPath, 0, popupIndex);
msm.setSelectedPath(newPath);
return;
}
} else {
// selecting child
if (len > 0 && path[len-1] instanceof JMenu &&
!((JMenu)path[len-1]).isTopLevelMenu()) {
// we have a submenu, open it
JMenu menu = (JMenu)path[len-1];
JPopupMenu popup = menu.getPopupMenu();
MenuElement[] subs = popup.getSubElements();
MenuElement item = findEnabledChild(subs, -1, true);
MenuElement[] newPath;
if (item == null) {
newPath = new MenuElement[len+1];
} else {
newPath = new MenuElement[len+2];
newPath[len+1] = item;
}
System.arraycopy(path, 0, newPath, 0, len);
newPath[len] = popup;
msm.setSelectedPath(newPath);
return;
}
}
// check if we have a toplevel menu selected.
// If this is the case, we select another toplevel menu
if (len > 1 && path[0] instanceof JMenuBar) {
MenuElement currentMenu = path[1];
MenuElement nextMenu = findEnabledChild(
path[0].getSubElements(), currentMenu, direction);
if (nextMenu != null && nextMenu != currentMenu) {
MenuElement newSelection[];
if (len == 2) {
// menu is selected but its popup not shown
newSelection = new MenuElement[2];
newSelection[0] = path[0];
newSelection[1] = nextMenu;
} else {
// menu is selected and its popup is shown
newSelection = new MenuElement[3];
newSelection[0] = path[0];
newSelection[1] = nextMenu;
newSelection[2] = ((JMenu)nextMenu).getPopupMenu();
}
msm.setSelectedPath(newSelection);
}
}
}
private void selectItem(boolean direction) {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement path[] = msm.getSelectedPath();
if (path.length == 0) {
return;
}
int len = path.length;
if (len == 1 && path[0] instanceof JPopupMenu) {
JPopupMenu popup = (JPopupMenu) path[0];
MenuElement[] newPath = new MenuElement[2];
newPath[0] = popup;
newPath[1] = findEnabledChild(popup.getSubElements(), -1, direction);
msm.setSelectedPath(newPath);
} else if (len == 2 &&
path[0] instanceof JMenuBar && path[1] instanceof JMenu) {
// a toplevel menu is selected, but its popup not shown.
// Show the popup and select the first item
JPopupMenu popup = ((JMenu)path[1]).getPopupMenu();
MenuElement next =
findEnabledChild(popup.getSubElements(), -1, FORWARD);
MenuElement[] newPath;
if (next != null) {
// an enabled item found -- include it in newPath
newPath = new MenuElement[4];
newPath[3] = next;
} else {
// menu has no enabled items -- still must show the popup
newPath = new MenuElement[3];
}
System.arraycopy(path, 0, newPath, 0, 2);
newPath[2] = popup;
msm.setSelectedPath(newPath);
} else if (path[len-1] instanceof JPopupMenu &&
path[len-2] instanceof JMenu) {
// a menu (not necessarily toplevel) is open and its popup
// shown. Select the appropriate menu item
JMenu menu = (JMenu)path[len-2];
JPopupMenu popup = menu.getPopupMenu();
MenuElement next =
findEnabledChild(popup.getSubElements(), -1, direction);
if (next != null) {
MenuElement[] newPath = new MenuElement[len+1];
System.arraycopy(path, 0, newPath, 0, len);
newPath[len] = next;
msm.setSelectedPath(newPath);
} else {
// all items in the popup are disabled.
// We're going to find the parent popup menu and select
// its next item. If there's no parent popup menu (i.e.
// current menu is toplevel), do nothing
if (len > 2 && path[len-3] instanceof JPopupMenu) {
popup = ((JPopupMenu)path[len-3]);
next = findEnabledChild(popup.getSubElements(),
menu, direction);
if (next != null && next != menu) {
MenuElement[] newPath = new MenuElement[len-1];
System.arraycopy(path, 0, newPath, 0, len-2);
newPath[len-2] = next;
msm.setSelectedPath(newPath);
}
}
}
} else {
// just select the next item, no path expansion needed
MenuElement subs[] = path[len-2].getSubElements();
MenuElement nextChild =
findEnabledChild(subs, path[len-1], direction);
if (nextChild == null) {
nextChild = findEnabledChild(subs, -1, direction);
}
if (nextChild != null) {
path[len-1] = nextChild;
msm.setSelectedPath(path);
}
}
}
private void cancel() {
// 4234793: This action should call JPopupMenu.firePopupMenuCanceled but it's
// a protected method. The real solution could be to make
// firePopupMenuCanceled public and call it directly.
JPopupMenu lastPopup = getLastPopup();
if (lastPopup != null) {
lastPopup.putClientProperty("JPopupMenu.firePopupMenuCanceled", Boolean.TRUE);
}
String mode = UIManager.getString("Menu.cancelMode");
if ("hideMenuTree".equals(mode)) {
MenuSelectionManager.defaultManager().clearSelectedPath();
} else {
shortenSelectedPath();
}
}
private void shortenSelectedPath() {
MenuElement path[] = MenuSelectionManager.defaultManager().getSelectedPath();
if (path.length <= 2) {
MenuSelectionManager.defaultManager().clearSelectedPath();
return;
}
// unselect MenuItem and its Popup by default
int value = 2;
MenuElement lastElement = path[path.length - 1];
JPopupMenu lastPopup = getLastPopup();
if (lastElement == lastPopup) {
MenuElement previousElement = path[path.length - 2];
if (previousElement instanceof JMenu) {
JMenu lastMenu = (JMenu) previousElement;
if (lastMenu.isEnabled() && lastPopup.getComponentCount() > 0) {
// unselect the last visible popup only
value = 1;
} else {
// unselect invisible popup and two visible elements
value = 3;
}
}
}
if (path.length - value <= 2
&& !UIManager.getBoolean("Menu.preserveTopLevelSelection")) {
// clear selection for the topLevelMenu
value = path.length;
}
MenuElement newPath[] = new MenuElement[path.length - value];
System.arraycopy(path, 0, newPath, 0, path.length - value);
MenuSelectionManager.defaultManager().setSelectedPath(newPath);
}
}
private static MenuElement nextEnabledChild(MenuElement e[],
int fromIndex, int toIndex) {
for (int i=fromIndex; i<=toIndex; i++) {
if (e[i] != null) {
Component comp = e[i].getComponent();
if ( comp != null
&& (comp.isEnabled() || UIManager.getBoolean("MenuItem.disabledAreNavigable"))
&& comp.isVisible()) {
return e[i];
}
}
}
return null;
}
private static MenuElement previousEnabledChild(MenuElement e[],
int fromIndex, int toIndex) {
for (int i=fromIndex; i>=toIndex; i--) {
if (e[i] != null) {
Component comp = e[i].getComponent();
if ( comp != null
&& (comp.isEnabled() || UIManager.getBoolean("MenuItem.disabledAreNavigable"))
&& comp.isVisible()) {
return e[i];
}
}
}
return null;
}
static MenuElement findEnabledChild(MenuElement e[], int fromIndex,
boolean forward) {
MenuElement result;
if (forward) {
result = nextEnabledChild(e, fromIndex+1, e.length-1);
if (result == null) result = nextEnabledChild(e, 0, fromIndex-1);
} else {
result = previousEnabledChild(e, fromIndex-1, 0);
if (result == null) result = previousEnabledChild(e, e.length-1,
fromIndex+1);
}
return result;
}
static MenuElement findEnabledChild(MenuElement e[],
MenuElement elem, boolean forward) {
for (int i=0; i<e.length; i++) {
if (e[i] == elem) {
return findEnabledChild(e, i, forward);
}
}
return null;
}
static class MouseGrabber implements ChangeListener,
AWTEventListener, ComponentListener, WindowListener {
Window grabbedWindow;
MenuElement[] lastPathSelected;
public MouseGrabber() {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
msm.addChangeListener(this);
this.lastPathSelected = msm.getSelectedPath();
if(this.lastPathSelected.length != 0) {
grabWindow(this.lastPathSelected);
}
}
void uninstall() {
synchronized (MOUSE_GRABBER_KEY) {
MenuSelectionManager.defaultManager().removeChangeListener(this);
ungrabWindow();
AppContext.getAppContext().remove(MOUSE_GRABBER_KEY);
}
}
void grabWindow(MenuElement[] newPath) {
// A grab needs to be added
final Toolkit tk = Toolkit.getDefaultToolkit();
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Object>() {
public Object run() {
tk.addAWTEventListener(MouseGrabber.this,
AWTEvent.MOUSE_EVENT_MASK |
AWTEvent.MOUSE_MOTION_EVENT_MASK |
AWTEvent.MOUSE_WHEEL_EVENT_MASK |
AWTEvent.WINDOW_EVENT_MASK | sun.awt.SunToolkit.GRAB_EVENT_MASK);
return null;
}
}
);
Component invoker = newPath[0].getComponent();
if (invoker instanceof JPopupMenu) {
invoker = ((JPopupMenu)invoker).getInvoker();
}
grabbedWindow = invoker instanceof Window?
(Window)invoker :
SwingUtilities.getWindowAncestor(invoker);
if(grabbedWindow != null) {
if(tk instanceof sun.awt.SunToolkit) {
((sun.awt.SunToolkit)tk).grab(grabbedWindow);
} else {
grabbedWindow.addComponentListener(this);
grabbedWindow.addWindowListener(this);
}
}
}
void ungrabWindow() {
final Toolkit tk = Toolkit.getDefaultToolkit();
// The grab should be removed
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Object>() {
public Object run() {
tk.removeAWTEventListener(MouseGrabber.this);
return null;
}
}
);
realUngrabWindow();
}
void realUngrabWindow() {
Toolkit tk = Toolkit.getDefaultToolkit();
if(grabbedWindow != null) {
if(tk instanceof sun.awt.SunToolkit) {
((sun.awt.SunToolkit)tk).ungrab(grabbedWindow);
} else {
grabbedWindow.removeComponentListener(this);
grabbedWindow.removeWindowListener(this);
}
grabbedWindow = null;
}
}
public void stateChanged(ChangeEvent e) {
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
MenuElement[] p = msm.getSelectedPath();
if (lastPathSelected.length == 0 && p.length != 0) {
grabWindow(p);
}
if (lastPathSelected.length != 0 && p.length == 0) {
ungrabWindow();
}
lastPathSelected = p;
}
public void eventDispatched(AWTEvent ev) {
if(ev instanceof sun.awt.UngrabEvent) {
// Popup should be canceled in case of ungrab event
cancelPopupMenu( );
return;
}
if (!(ev instanceof MouseEvent)) {
// We are interested in MouseEvents only
return;
}
MouseEvent me = (MouseEvent) ev;
Component src = me.getComponent();
switch (me.getID()) {
case MouseEvent.MOUSE_PRESSED:
if (isInPopup(src) ||
(src instanceof JMenu && ((JMenu)src).isSelected())) {
return;
}
if (!(src instanceof JComponent) ||
! (((JComponent)src).getClientProperty("doNotCancelPopup")
== BasicComboBoxUI.HIDE_POPUP_KEY)) {
// Cancel popup only if this property was not set.
// If this property is set to TRUE component wants
// to deal with this event by himself.
cancelPopupMenu();
// Ask UIManager about should we consume event that closes
// popup. This made to match native apps behaviour.
boolean consumeEvent =
UIManager.getBoolean("PopupMenu.consumeEventOnClose");
// Consume the event so that normal processing stops.
if(consumeEvent && !(src instanceof MenuElement)) {
me.consume();
}
}
break;
case MouseEvent.MOUSE_RELEASED:
if(!(src instanceof MenuElement)) {
// Do not forward event to MSM, let component handle it
if (isInPopup(src)) {
break;
}
}
if(src instanceof JMenu || !(src instanceof JMenuItem)) {
MenuSelectionManager.defaultManager().
processMouseEvent(me);
}
break;
case MouseEvent.MOUSE_DRAGGED:
if(!(src instanceof MenuElement)) {
// For the MOUSE_DRAGGED event the src is
// the Component in which mouse button was pressed.
// If the src is in popupMenu,
// do not forward event to MSM, let component handle it.
if (isInPopup(src)) {
break;
}
}
MenuSelectionManager.defaultManager().
processMouseEvent(me);
break;
case MouseEvent.MOUSE_WHEEL:
if (isInPopup(src)) {
return;
}
cancelPopupMenu();
break;
}
}
boolean isInPopup(Component src) {
for (Component c=src; c!=null; c=c.getParent()) {
if (c instanceof Applet || c instanceof Window) {
break;
} else if (c instanceof JPopupMenu) {
return true;
}
}
return false;
}
void cancelPopupMenu() {
// We should ungrab window if a user code throws
// an unexpected runtime exception. See 6495920.
try {
// 4234793: This action should call firePopupMenuCanceled but it's
// a protected method. The real solution could be to make
// firePopupMenuCanceled public and call it directly.
List<JPopupMenu> popups = getPopups();
for (JPopupMenu popup : popups) {
popup.putClientProperty("JPopupMenu.firePopupMenuCanceled", Boolean.TRUE);
}
MenuSelectionManager.defaultManager().clearSelectedPath();
} catch (RuntimeException ex) {
realUngrabWindow();
throw ex;
} catch (Error err) {
realUngrabWindow();
throw err;
}
}
public void componentResized(ComponentEvent e) {
cancelPopupMenu();
}
public void componentMoved(ComponentEvent e) {
cancelPopupMenu();
}
public void componentShown(ComponentEvent e) {
cancelPopupMenu();
}
public void componentHidden(ComponentEvent e) {
cancelPopupMenu();
}
public void windowClosing(WindowEvent e) {
cancelPopupMenu();
}
public void windowClosed(WindowEvent e) {
cancelPopupMenu();
}
public void windowIconified(WindowEvent e) {
cancelPopupMenu();
}
public void windowDeactivated(WindowEvent e) {
cancelPopupMenu();
}
public void windowOpened(WindowEvent e) {}
public void windowDeiconified(WindowEvent e) {}
public void windowActivated(WindowEvent e) {}
}
/**
* This helper is added to MenuSelectionManager as a ChangeListener to
* listen to menu selection changes. When a menu is activated, it passes
* focus to its parent JRootPane, and installs an ActionMap/InputMap pair
* on that JRootPane. Those maps are necessary in order for menu
* navigation to work. When menu is being deactivated, it restores focus
* to the component that has had it before menu activation, and uninstalls
* the maps.
* This helper is also installed as a KeyListener on root pane when menu
* is active. It forwards key events to MenuSelectionManager for mnemonic
* keys handling.
*/
static class MenuKeyboardHelper
implements ChangeListener, KeyListener {
private Component lastFocused = null;
private MenuElement[] lastPathSelected = new MenuElement[0];
private JPopupMenu lastPopup;
private JRootPane invokerRootPane;
private ActionMap menuActionMap = getActionMap();
private InputMap menuInputMap;
private boolean focusTraversalKeysEnabled;
/*
* Fix for 4213634
* If this is false, KEY_TYPED and KEY_RELEASED events are NOT
* processed. This is needed to avoid activating a menuitem when
* the menu and menuitem share the same mnemonic.
*/
private boolean receivedKeyPressed = false;
void removeItems() {
if (lastFocused != null) {
if(!lastFocused.requestFocusInWindow()) {
// Workarounr for 4810575.
// If lastFocused is not in currently focused window
// requestFocusInWindow will fail. In this case we must
// request focus by requestFocus() if it was not
// transferred from our popup.
Window cfw = KeyboardFocusManager
.getCurrentKeyboardFocusManager()
.getFocusedWindow();
if(cfw != null &&
"###focusableSwingPopup###".equals(cfw.getName())) {
lastFocused.requestFocus();
}
}
lastFocused = null;
}
if (invokerRootPane != null) {
invokerRootPane.removeKeyListener(this);
invokerRootPane.setFocusTraversalKeysEnabled(focusTraversalKeysEnabled);
removeUIInputMap(invokerRootPane, menuInputMap);
removeUIActionMap(invokerRootPane, menuActionMap);
invokerRootPane = null;
}
receivedKeyPressed = false;
}
private FocusListener rootPaneFocusListener = new FocusAdapter() {
public void focusGained(FocusEvent ev) {
Component opposite = ev.getOppositeComponent();
if (opposite != null) {
lastFocused = opposite;
}
ev.getComponent().removeFocusListener(this);
}
};
/**
* Return the last JPopupMenu in <code>path,
* or <code>null if none found
*/
JPopupMenu getActivePopup(MenuElement[] path) {
for (int i=path.length-1; i>=0; i--) {
MenuElement elem = path[i];
if (elem instanceof JPopupMenu) {
return (JPopupMenu)elem;
}
}
return null;
}
void addUIInputMap(JComponent c, InputMap map) {
InputMap lastNonUI = null;
InputMap parent = c.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
while (parent != null && !(parent instanceof UIResource)) {
lastNonUI = parent;
parent = parent.getParent();
}
if (lastNonUI == null) {
c.setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW, map);
} else {
lastNonUI.setParent(map);
}
map.setParent(parent);
}
void addUIActionMap(JComponent c, ActionMap map) {
ActionMap lastNonUI = null;
ActionMap parent = c.getActionMap();
while (parent != null && !(parent instanceof UIResource)) {
lastNonUI = parent;
parent = parent.getParent();
}
if (lastNonUI == null) {
c.setActionMap(map);
} else {
lastNonUI.setParent(map);
}
map.setParent(parent);
}
void removeUIInputMap(JComponent c, InputMap map) {
InputMap im = null;
InputMap parent = c.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
while (parent != null) {
if (parent == map) {
if (im == null) {
c.setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW,
map.getParent());
} else {
im.setParent(map.getParent());
}
break;
}
im = parent;
parent = parent.getParent();
}
}
void removeUIActionMap(JComponent c, ActionMap map) {
ActionMap im = null;
ActionMap parent = c.getActionMap();
while (parent != null) {
if (parent == map) {
if (im == null) {
c.setActionMap(map.getParent());
} else {
im.setParent(map.getParent());
}
break;
}
im = parent;
parent = parent.getParent();
}
}
public void stateChanged(ChangeEvent ev) {
if (!(UIManager.getLookAndFeel() instanceof BasicLookAndFeel)) {
uninstall();
return;
}
MenuSelectionManager msm = (MenuSelectionManager)ev.getSource();
MenuElement[] p = msm.getSelectedPath();
JPopupMenu popup = getActivePopup(p);
if (popup != null && !popup.isFocusable()) {
// Do nothing for non-focusable popups
return;
}
if (lastPathSelected.length != 0 && p.length != 0 ) {
if (!checkInvokerEqual(p[0],lastPathSelected[0])) {
removeItems();
lastPathSelected = new MenuElement[0];
}
}
if (lastPathSelected.length == 0 && p.length > 0) {
// menu posted
JComponent invoker;
if (popup == null) {
if (p.length == 2 && p[0] instanceof JMenuBar &&
p[1] instanceof JMenu) {
// a menu has been selected but not open
invoker = (JComponent)p[1];
popup = ((JMenu)invoker).getPopupMenu();
} else {
return;
}
} else {
Component c = popup.getInvoker();
if(c instanceof JFrame) {
invoker = ((JFrame)c).getRootPane();
} else if(c instanceof JDialog) {
invoker = ((JDialog)c).getRootPane();
} else if(c instanceof JApplet) {
invoker = ((JApplet)c).getRootPane();
} else {
while (!(c instanceof JComponent)) {
if (c == null) {
return;
}
c = c.getParent();
}
invoker = (JComponent)c;
}
}
// remember current focus owner
lastFocused = KeyboardFocusManager.
getCurrentKeyboardFocusManager().getFocusOwner();
// request focus on root pane and install keybindings
// used for menu navigation
invokerRootPane = SwingUtilities.getRootPane(invoker);
if (invokerRootPane != null) {
invokerRootPane.addFocusListener(rootPaneFocusListener);
invokerRootPane.requestFocus(true);
invokerRootPane.addKeyListener(this);
focusTraversalKeysEnabled = invokerRootPane.
getFocusTraversalKeysEnabled();
invokerRootPane.setFocusTraversalKeysEnabled(false);
menuInputMap = getInputMap(popup, invokerRootPane);
addUIInputMap(invokerRootPane, menuInputMap);
addUIActionMap(invokerRootPane, menuActionMap);
}
} else if (lastPathSelected.length != 0 && p.length == 0) {
// menu hidden -- return focus to where it had been before
// and uninstall menu keybindings
removeItems();
} else {
if (popup != lastPopup) {
receivedKeyPressed = false;
}
}
// Remember the last path selected
lastPathSelected = p;
lastPopup = popup;
}
public void keyPressed(KeyEvent ev) {
receivedKeyPressed = true;
MenuSelectionManager.defaultManager().processKeyEvent(ev);
}
public void keyReleased(KeyEvent ev) {
if (receivedKeyPressed) {
receivedKeyPressed = false;
MenuSelectionManager.defaultManager().processKeyEvent(ev);
}
}
public void keyTyped(KeyEvent ev) {
if (receivedKeyPressed) {
MenuSelectionManager.defaultManager().processKeyEvent(ev);
}
}
void uninstall() {
synchronized (MENU_KEYBOARD_HELPER_KEY) {
MenuSelectionManager.defaultManager().removeChangeListener(this);
AppContext.getAppContext().remove(MENU_KEYBOARD_HELPER_KEY);
}
}
}
}
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